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1 | #include <string.h> |
1 | #include <string.h> |
2 | #include "printf_P.h" |
2 | #include "printf_P.h" |
3 | #include "timer0.h" |
3 | #include "timer0.h" |
4 | #include "fat16.h" |
4 | #include "fat16.h" |
5 | #include "sdc.h" |
5 | #include "sdc.h" |
6 | #include "uart1.h" |
6 | #include "uart1.h" |
7 | 7 | ||
8 | 8 | ||
9 | /* |
9 | /* |
10 | FAT16 Drive Layout: |
10 | FAT16 Drive Layout: |
11 | Description Offset |
11 | Description Offset |
12 | Volume Boot Sector Start of Partition |
12 | Volume Boot Sector Start of Partition |
13 | Fat Tables Start + # of Reserved Sectors |
13 | Fat Tables Start + # of Reserved Sectors |
14 | Root Directory Entry Start + # of Reserved + (# of Sectors Per FAT * 2) |
14 | Root Directory Entry Start + # of Reserved + (# of Sectors Per FAT * 2) |
15 | Data Area (Starts with Cluster #2) Start + # of Reserved + (# of Sectors Per FAT * 2) + ((Maximum Root Directory Entries * 32) / Bytes per Sector) |
15 | Data Area (Starts with Cluster #2) Start + # of Reserved + (# of Sectors Per FAT * 2) + ((Maximum Root Directory Entries * 32) / Bytes per Sector) |
16 | */ |
16 | */ |
17 | 17 | ||
18 | 18 | ||
19 | /* |
19 | /* |
20 | ________________________________________________________________________________________________________________________________________ |
20 | ________________________________________________________________________________________________________________________________________ |
21 | 21 | ||
22 | Structure of an partition entry |
22 | Structure of an partition entry |
23 | ________________________________________________________________________________________________________________________________________ |
23 | ________________________________________________________________________________________________________________________________________ |
24 | 24 | ||
25 | Partition Entry is 16 bytes long |
25 | Partition Entry is 16 bytes long |
26 | */ |
26 | */ |
27 | typedef struct |
27 | typedef struct |
28 | { |
28 | { |
29 | uint8_t PartitionState; // Current State of Partition (00h=Inactive, 80h=Active) |
29 | uint8_t PartitionState; // Current State of Partition (00h=Inactive, 80h=Active) |
30 | uint8_t BeginningHead; // Beginning of Partition - Head |
30 | uint8_t BeginningHead; // Beginning of Partition - Head |
31 | uint16_t BeginningCylSec; // Beginning of Partition - Cylinder/Sector (See Below) |
31 | uint16_t BeginningCylSec; // Beginning of Partition - Cylinder/Sector (See Below) |
32 | uint8_t Type; // Type of Partition (See List Below) |
32 | uint8_t Type; // Type of Partition (See List Below) |
33 | uint8_t EndHead; // End of Partition - Head |
33 | uint8_t EndHead; // End of Partition - Head |
34 | uint16_t EndCylSec; // End of Partition - Cylinder/Sector |
34 | uint16_t EndCylSec; // End of Partition - Cylinder/Sector |
35 | uint32_t NoSectorsBeforePartition; // Number of Sectors between the MBR and the First Sector in the Partition |
35 | uint32_t NoSectorsBeforePartition; // Number of Sectors between the MBR and the First Sector in the Partition |
36 | uint32_t NoSectorsPartition ; // Number of Sectors in the Partition |
36 | uint32_t NoSectorsPartition ; // Number of Sectors in the Partition |
37 | } __attribute__((packed)) PartitionEntry_t; |
37 | } __attribute__((packed)) PartitionEntry_t; |
38 | 38 | ||
39 | /* |
39 | /* |
40 | Coding of Cylinder/Sector words |
40 | Coding of Cylinder/Sector words |
41 | 41 | ||
42 | Cylinder is 10 bits: [7:0] at [15:8] and [9:8] at [7:6] |
42 | Cylinder is 10 bits: [7:0] at [15:8] and [9:8] at [7:6] |
43 | Sector is 5 bits: [5:0] at [5:0] |
43 | Sector is 5 bits: [5:0] at [5:0] |
44 | */ |
44 | */ |
45 | 45 | ||
46 | // Partition Types: |
46 | // Partition Types: |
47 | #define PART_TYPE_UNKNOWN 0x00 |
47 | #define PART_TYPE_UNKNOWN 0x00 |
48 | #define PART_TYPE_FAT12 0x01 |
48 | #define PART_TYPE_FAT12 0x01 |
49 | #define PART_TYPE_XENIX 0x02 |
49 | #define PART_TYPE_XENIX 0x02 |
50 | #define PART_TYPE_FAT16_ST_32_MB 0x04 |
50 | #define PART_TYPE_FAT16_ST_32_MB 0x04 |
51 | #define PART_TYPE_EXTDOS 0x05 |
51 | #define PART_TYPE_EXTDOS 0x05 |
52 | #define PART_TYPE_FAT16_LT_32_MB 0x06 |
52 | #define PART_TYPE_FAT16_LT_32_MB 0x06 |
53 | #define PART_TYPE_NTFS 0x07 |
53 | #define PART_TYPE_NTFS 0x07 |
54 | #define PART_TYPE_FAT32 0x0B |
54 | #define PART_TYPE_FAT32 0x0B |
55 | #define PART_TYPE_FAT32LBA 0x0C |
55 | #define PART_TYPE_FAT32LBA 0x0C |
56 | #define PART_TYPE_FAT16LBA 0x0E |
56 | #define PART_TYPE_FAT16LBA 0x0E |
57 | #define PART_TYPE_EXTDOSLBA 0x0F |
57 | #define PART_TYPE_EXTDOSLBA 0x0F |
58 | #define PART_TYPE_EISA 0x12 |
58 | #define PART_TYPE_EISA 0x12 |
59 | #define PART_TYPE_ONTRACK 0x33 |
59 | #define PART_TYPE_ONTRACK 0x33 |
60 | #define PART_TYPE_NOVELL 0x40 |
60 | #define PART_TYPE_NOVELL 0x40 |
61 | #define PART_TYPE_DYNAMIC 0x42 |
61 | #define PART_TYPE_DYNAMIC 0x42 |
62 | #define PART_TYPE_PCIX 0x4B |
62 | #define PART_TYPE_PCIX 0x4B |
63 | #define PART_TYPE_LINUX_SWAP 0x82 |
63 | #define PART_TYPE_LINUX_SWAP 0x82 |
64 | #define PART_TYPE_LINUX_NATIVE 0x83 |
64 | #define PART_TYPE_LINUX_NATIVE 0x83 |
65 | #define PART_TYPE_LINUX_LVM 0x8E |
65 | #define PART_TYPE_LINUX_LVM 0x8E |
66 | #define PART_TYPE_PHOENIXSAVE 0xA0 |
66 | #define PART_TYPE_PHOENIXSAVE 0xA0 |
67 | #define PART_TYPE_FREEBSD 0xA5 |
67 | #define PART_TYPE_FREEBSD 0xA5 |
68 | #define PART_TYPE_OPENBSD 0xA6 |
68 | #define PART_TYPE_OPENBSD 0xA6 |
69 | #define PART_TYPE_NETNBSD 0xA9 |
69 | #define PART_TYPE_NETNBSD 0xA9 |
70 | #define PART_TYPE_CPM 0xDB |
70 | #define PART_TYPE_CPM 0xDB |
71 | #define PART_TYPE_DBFS 0xE0 |
71 | #define PART_TYPE_DBFS 0xE0 |
72 | #define PART_TYPE_BBT 0xFF |
72 | #define PART_TYPE_BBT 0xFF |
73 | 73 | ||
74 | 74 | ||
75 | /* |
75 | /* |
76 | ________________________________________________________________________________________________________________________________________ |
76 | ________________________________________________________________________________________________________________________________________ |
77 | 77 | ||
78 | Structure of the MasterBootRecord |
78 | Structure of the MasterBootRecord |
79 | ________________________________________________________________________________________________________________________________________ |
79 | ________________________________________________________________________________________________________________________________________ |
80 | 80 | ||
81 | Master Boot Record is 512 bytes long |
81 | Master Boot Record is 512 bytes long |
82 | The Master Boot Record is the same for pretty much all Operating Systems. |
82 | The Master Boot Record is the same for pretty much all Operating Systems. |
83 | It is located on the first Sector of the Hard Drive, at Cylinder 0, Head 0, Sector 1 |
83 | It is located on the first Sector of the Hard Drive, at Cylinder 0, Head 0, Sector 1 |
84 | */ |
84 | */ |
85 | typedef struct |
85 | typedef struct |
86 | { |
86 | { |
87 | uint8_t ExecutableCode[446]; // 446 bytes for machine start code |
87 | uint8_t ExecutableCode[446]; // 446 bytes for machine start code |
88 | PartitionEntry_t PartitionEntry1; // 16 bytes for partition entry 1 |
88 | PartitionEntry_t PartitionEntry1; // 16 bytes for partition entry 1 |
89 | PartitionEntry_t PartitionEntry2; // 16 bytes for partition entry 2 |
89 | PartitionEntry_t PartitionEntry2; // 16 bytes for partition entry 2 |
90 | PartitionEntry_t PartitionEntry3; // 16 bytes for partition entry 3 |
90 | PartitionEntry_t PartitionEntry3; // 16 bytes for partition entry 3 |
91 | PartitionEntry_t PartitionEntry4; // 16 bytes for partition entry 4 |
91 | PartitionEntry_t PartitionEntry4; // 16 bytes for partition entry 4 |
92 | uint16_t ExecutableMarker; // BIOS-Signature (0x55 0xAA) |
92 | uint16_t ExecutableMarker; // BIOS-Signature (0x55 0xAA) |
93 | } __attribute__((packed)) MBR_Entry_t; |
93 | } __attribute__((packed)) MBR_Entry_t; |
94 | 94 | ||
95 | 95 | ||
96 | /* |
96 | /* |
97 | ________________________________________________________________________________________________________________________________________ |
97 | ________________________________________________________________________________________________________________________________________ |
98 | 98 | ||
99 | Structure of the VolumeBootRecord |
99 | Structure of the VolumeBootRecord |
100 | ________________________________________________________________________________________________________________________________________ |
100 | ________________________________________________________________________________________________________________________________________ |
101 | 101 | ||
102 | The Volume Boot Record is 512 bytes long |
102 | The Volume Boot Record is 512 bytes long |
103 | This information is located in the first sector of every partition. |
103 | This information is located in the first sector of every partition. |
104 | */ |
104 | */ |
105 | typedef struct |
105 | typedef struct |
106 | { |
106 | { |
107 | uint8_t JumpCode[3]; // Jump Code + NOP |
107 | uint8_t JumpCode[3]; // Jump Code + NOP |
108 | int8_t OEMName[8]; // OEM Name |
108 | int8_t OEMName[8]; // OEM Name |
109 | uint16_t BytesPerSector; // Bytes Per Sector |
109 | uint16_t BytesPerSector; // Bytes Per Sector |
110 | uint8_t SectorsPerCluster; // Sectors Per Cluster |
110 | uint8_t SectorsPerCluster; // Sectors Per Cluster |
111 | uint16_t ReservedSectors; // Reserved Sectors |
111 | uint16_t ReservedSectors; // Reserved Sectors |
112 | uint8_t NoFATCopies; // Number of Copies of FAT |
112 | uint8_t NoFATCopies; // Number of Copies of FAT |
113 | uint16_t MaxRootEntries; // Maximum Root Directory Entries |
113 | uint16_t MaxRootEntries; // Maximum Root Directory Entries |
114 | uint16_t NoSectorsInPartSml32MB; // Number of Sectors in Partition Smaller than 32 MB |
114 | uint16_t NoSectorsInPartSml32MB; // Number of Sectors in Partition Smaller than 32 MB |
115 | uint8_t MediaDescriptor; // Media Descriptor (0xF8 for Hard Disks) |
115 | uint8_t MediaDescriptor; // Media Descriptor (0xF8 for Hard Disks) |
116 | uint16_t SectorsPerFAT; // Sectors Per FAT |
116 | uint16_t SectorsPerFAT; // Sectors Per FAT |
117 | uint16_t SectorsPerTrack; // Sectors Per Track |
117 | uint16_t SectorsPerTrack; // Sectors Per Track |
118 | uint16_t NoHeads; // Number of Heads |
118 | uint16_t NoHeads; // Number of Heads |
119 | uint32_t NoHiddenSectors; // Number of Hidden Sectors in Partition |
119 | uint32_t NoHiddenSectors; // Number of Hidden Sectors in Partition |
120 | uint32_t NoSectors; // Number of Sectors in Partition |
120 | uint32_t NoSectors; // Number of Sectors in Partition |
121 | uint16_t DriveNo; // Logical Drive Number of Partition |
121 | uint16_t DriveNo; // Logical Drive Number of Partition |
122 | uint8_t ExtendedSig; // Extended Signature (0x29) |
122 | uint8_t ExtendedSig; // Extended Signature (0x29) |
123 | uint32_t SerialNo; // Serial Number of the Partition |
123 | uint32_t SerialNo; // Serial Number of the Partition |
124 | int8_t VolumeName[11]; // Volume Name of the Partititon |
124 | int8_t VolumeName[11]; // Volume Name of the Partititon |
125 | int8_t FATName[8]; // FAT Name (FAT16) |
125 | int8_t FATName[8]; // FAT Name (FAT16) |
126 | uint8_t ExecutableCode[446]; // 446 bytes for machine start code |
126 | uint8_t ExecutableCode[446]; // 446 bytes for machine start code |
127 | uint16_t ExecutableMarker; // Executable Marker (0x55 0xAA) |
127 | uint16_t ExecutableMarker; // Executable Marker (0x55 0xAA) |
128 | } __attribute__((packed)) VBR_Entry_t; |
128 | } __attribute__((packed)) VBR_Entry_t; |
129 | 129 | ||
130 | 130 | ||
131 | 131 | ||
132 | /* |
132 | /* |
133 | ________________________________________________________________________________________________________________________________________ |
133 | ________________________________________________________________________________________________________________________________________ |
134 | 134 | ||
135 | Structure of an directory entry |
135 | Structure of an directory entry |
136 | ________________________________________________________________________________________________________________________________________ |
136 | ________________________________________________________________________________________________________________________________________ |
137 | 137 | ||
138 | Directory entry is 32 bytes. |
138 | Directory entry is 32 bytes. |
139 | */ |
139 | */ |
140 | typedef struct |
140 | typedef struct |
141 | { |
141 | { |
142 | int8_t Name[8]; // 8 bytes name, padded with spaces. |
142 | int8_t Name[8]; // 8 bytes name, padded with spaces. |
143 | uint8_t Extension[3]; // 3 bytes extension, padded with spaces. |
143 | uint8_t Extension[3]; // 3 bytes extension, padded with spaces. |
144 | uint8_t Attribute; // attribute of the directory entry (unused,archive,read-only,system,directory,volume) |
144 | uint8_t Attribute; // attribute of the directory entry (unused,archive,read-only,system,directory,volume) |
145 | uint8_t Reserved[10]; // reserved bytes within the directory entry. |
145 | uint8_t Reserved[10]; // reserved bytes within the directory entry. |
146 | uint32_t DateTime; // date and time of last write access to the file or directory. |
146 | uint32_t DateTime; // date and time of last write access to the file or directory. |
147 | uint16_t StartCluster; // first cluster of the file or directory. |
147 | uint16_t StartCluster; // first cluster of the file or directory. |
148 | uint32_t Size; // size of the file or directory in bytes. |
148 | uint32_t Size; // size of the file or directory in bytes. |
149 | } __attribute__((packed)) DirEntry_t; |
149 | } __attribute__((packed)) DirEntry_t; |
150 | 150 | ||
151 | #define SLOT_EMPTY 0x00 // slot has never been used |
151 | #define SLOT_EMPTY 0x00 // slot has never been used |
152 | #define SLOT_E5 0x05 // the real value is 0xe5 |
152 | #define SLOT_E5 0x05 // the real value is 0xe5 |
153 | #define SLOT_DELETED 0xE5 // file in this slot deleted |
153 | #define SLOT_DELETED 0xE5 // file in this slot deleted |
154 | 154 | ||
155 | #define ATTR_NONE 0x00 // normal file |
155 | #define ATTR_NONE 0x00 // normal file |
156 | #define ATTR_READONLY 0x01 // file is readonly |
156 | #define ATTR_READONLY 0x01 // file is readonly |
157 | #define ATTR_HIDDEN 0x02 // file is hidden |
157 | #define ATTR_HIDDEN 0x02 // file is hidden |
158 | #define ATTR_SYSTEM 0x04 // file is a system file |
158 | #define ATTR_SYSTEM 0x04 // file is a system file |
159 | #define ATTR_VOLUMELABEL 0x08 // entry is a volume label |
159 | #define ATTR_VOLUMELABEL 0x08 // entry is a volume label |
160 | #define ATTR_LONG_FILENAME 0x0F // this is a long filename entry |
160 | #define ATTR_LONG_FILENAME 0x0F // this is a long filename entry |
161 | #define ATTR_SUBDIRECTORY 0x10 // entry is a directory name |
161 | #define ATTR_SUBDIRECTORY 0x10 // entry is a directory name |
162 | #define ATTR_ARCHIVE 0x20 // file is new or modified |
162 | #define ATTR_ARCHIVE 0x20 // file is new or modified |
163 | 163 | ||
164 | 164 | ||
165 | /* |
165 | /* |
166 | ________________________________________________________________________________________________________________________________________ |
166 | ________________________________________________________________________________________________________________________________________ |
167 | 167 | ||
168 | Structure of an entry within the fileallocationtable. |
168 | Structure of an entry within the fileallocationtable. |
169 | ________________________________________________________________________________________________________________________________________ |
169 | ________________________________________________________________________________________________________________________________________ |
170 | */ |
170 | */ |
171 | typedef struct |
171 | typedef struct |
172 | { |
172 | { |
173 | uint16_t NextCluster; // the next cluster of the file. |
173 | uint16_t NextCluster; // the next cluster of the file. |
174 | } __attribute__((packed)) Fat16Entry_t; |
174 | } __attribute__((packed)) Fat16Entry_t; |
175 | 175 | ||
176 | // secial fat entries |
176 | // secial fat entries |
177 | #define FAT16_CLUSTER_FREE 0x0000 |
177 | #define FAT16_CLUSTER_FREE 0x0000 |
178 | #define FAT16_CLUSTER_RESERVED 0x0001 |
178 | #define FAT16_CLUSTER_RESERVED 0x0001 |
179 | #define FAT16_CLUSTER_USED_MIN 0x0002 |
179 | #define FAT16_CLUSTER_USED_MIN 0x0002 |
180 | #define FAT16_CLUSTER_USED_MAX 0xFFEF |
180 | #define FAT16_CLUSTER_USED_MAX 0xFFEF |
181 | #define FAT16_CLUSTER_ROOTDIR_MIN 0xFFF0 |
181 | #define FAT16_CLUSTER_ROOTDIR_MIN 0xFFF0 |
182 | #define FAT16_CLUSTER_ROOTDIR_MAX 0xFFF6 |
182 | #define FAT16_CLUSTER_ROOTDIR_MAX 0xFFF6 |
183 | #define FAT16_CLUSTER_BAD 0xFFF7 |
183 | #define FAT16_CLUSTER_BAD 0xFFF7 |
184 | #define FAT16_CLUSTER_LAST_MIN 0xFFF8 |
184 | #define FAT16_CLUSTER_LAST_MIN 0xFFF8 |
185 | #define FAT16_CLUSTER_LAST_MAX 0xFFFF |
185 | #define FAT16_CLUSTER_LAST_MAX 0xFFFF |
186 | 186 | ||
187 | /*****************************************************************************************************************************************/ |
187 | /*****************************************************************************************************************************************/ |
188 | /* */ |
188 | /* */ |
189 | /* Global variables needed for read- or write-acces to the FAT16- filesystem. */ |
189 | /* Global variables needed for read- or write-acces to the FAT16- filesystem. */ |
190 | /* */ |
190 | /* */ |
191 | /*****************************************************************************************************************************************/ |
191 | /*****************************************************************************************************************************************/ |
192 | 192 | ||
193 | #define MBR_SECTOR 0x00 // the masterboot record is located in sector 0. |
193 | #define MBR_SECTOR 0x00 // the masterboot record is located in sector 0. |
194 | #define DIRENTRY_SIZE 32 //bytes |
194 | #define DIRENTRY_SIZE 32 //bytes |
195 | #define DIRENTRIES_PER_SECTOR BYTES_PER_SECTOR/DIRENTRY_SIZE |
195 | #define DIRENTRIES_PER_SECTOR BYTES_PER_SECTOR/DIRENTRY_SIZE |
196 | #define FAT16_BYTES 2 |
196 | #define FAT16_BYTES 2 |
197 | #define FAT16_ENTRIES_PER_SECTOR BYTES_PER_SECTOR/FAT16_BYTES |
197 | #define FAT16_ENTRIES_PER_SECTOR BYTES_PER_SECTOR/FAT16_BYTES |
198 | 198 | ||
199 | #define FSTATE_UNUSED 0 |
199 | #define FSTATE_UNUSED 0 |
200 | #define FSTATE_USED 1 |
200 | #define FSTATE_USED 1 |
201 | 201 | ||
202 | typedef struct |
202 | typedef struct |
203 | { |
203 | { |
204 | uint8_t IsValid; // 0 means invalid, else valid |
204 | uint8_t IsValid; // 0 means invalid, else valid |
205 | uint8_t SectorsPerCluster; // how many sectors does a cluster contain? |
205 | uint8_t SectorsPerCluster; // how many sectors does a cluster contain? |
206 | uint8_t FatCopies; // Numbers of copies of the FAT |
206 | uint8_t FatCopies; // Numbers of copies of the FAT |
207 | uint16_t MaxRootEntries; // Possible number of entries in the root directory. |
207 | uint16_t MaxRootEntries; // Possible number of entries in the root directory. |
208 | uint16_t SectorsPerFat; // how many sectors does a fat16 contain? |
208 | uint16_t SectorsPerFat; // how many sectors does a fat16 contain? |
209 | uint32_t FirstFatSector; // sector of the start of the fat |
209 | uint32_t FirstFatSector; // sector of the start of the fat |
210 | uint32_t FirstRootDirSector; // sector of the rootdirectory |
210 | uint32_t FirstRootDirSector; // sector of the rootdirectory |
211 | uint32_t FirstDataSector; // sector of the first cluster containing data (cluster2). |
211 | uint32_t FirstDataSector; // sector of the first cluster containing data (cluster2). |
212 | uint32_t LastDataSector; // the last data sector of the partition |
212 | uint32_t LastDataSector; // the last data sector of the partition |
213 | } Partition_t; |
213 | } Partition_t; |
214 | 214 | ||
215 | Partition_t Partition; // Structure holds partition information |
215 | Partition_t Partition; // Structure holds partition information |
216 | 216 | ||
217 | File_t FilePointer[FILE_MAX_OPEN]; // Allocate Memmoryspace for each filepointer used. |
217 | File_t FilePointer[FILE_MAX_OPEN]; // Allocate Memmoryspace for each filepointer used. |
218 | 218 | ||
219 | 219 | ||
220 | /****************************************************************************************************************************************/ |
220 | /****************************************************************************************************************************************/ |
221 | /* Function: FileDateTime(DateTime_t *); */ |
221 | /* Function: FileDateTime(DateTime_t *); */ |
222 | /* */ |
222 | /* */ |
223 | /* Description: This function calculates the DOS date time from a pointer to a time structure. */ |
223 | /* Description: This function calculates the DOS date time from a pointer to a time structure. */ |
224 | /* */ |
224 | /* */ |
225 | /* Returnvalue: Returns the DOS date time. */ |
225 | /* Returnvalue: Returns the DOS date time. */ |
226 | /****************************************************************************************************************************************/ |
226 | /****************************************************************************************************************************************/ |
227 | 227 | ||
228 | uint32_t FileDateTime(DateTime_t * pTimeStruct) |
228 | uint32_t FileDateTime(DateTime_t * pTimeStruct) |
229 | { |
229 | { |
230 | uint32_t datetime = 0; |
230 | uint32_t datetime = 0; |
231 | if((pTimeStruct == 0) || !(pTimeStruct->Valid)) return datetime; |
231 | if((pTimeStruct == 0) || !(pTimeStruct->Valid)) return datetime; |
232 | 232 | ||
233 | datetime |= (0x0000007FL & (uint32_t)(pTimeStruct->Year - 1980))<<25; // set year |
233 | datetime |= (0x0000007FL & (uint32_t)(pTimeStruct->Year - 1980))<<25; // set year |
234 | datetime |= (0x0000000FL & (uint32_t)(pTimeStruct->Month))<<21; // set month |
234 | datetime |= (0x0000000FL & (uint32_t)(pTimeStruct->Month))<<21; // set month |
235 | datetime |= (0x0000001FL & (uint32_t)(pTimeStruct->Day))<<16; |
235 | datetime |= (0x0000001FL & (uint32_t)(pTimeStruct->Day))<<16; |
236 | datetime |= (0x0000001FL & (uint32_t)(pTimeStruct->Hour))<<11; |
236 | datetime |= (0x0000001FL & (uint32_t)(pTimeStruct->Hour))<<11; |
237 | datetime |= (0x0000003FL & (uint32_t)(pTimeStruct->Min))<<5; |
237 | datetime |= (0x0000003FL & (uint32_t)(pTimeStruct->Min))<<5; |
238 | datetime |= (0x0000001FL & (uint32_t)(pTimeStruct->Sec/2)); |
238 | datetime |= (0x0000001FL & (uint32_t)(pTimeStruct->Sec/2)); |
239 | return datetime; |
239 | return datetime; |
240 | } |
240 | } |
241 | 241 | ||
242 | 242 | ||
243 | /****************************************************************************************************************************************/ |
243 | /****************************************************************************************************************************************/ |
244 | /* Function: LockFilePointer(); */ |
244 | /* Function: LockFilePointer(); */ |
245 | /* */ |
245 | /* */ |
246 | /* Description: This function trys to lock a free file pointer. */ |
246 | /* Description: This function trys to lock a free file pointer. */ |
247 | /* */ |
247 | /* */ |
248 | /* Returnvalue: Returns the Filepointer on success or 0. */ |
248 | /* Returnvalue: Returns the Filepointer on success or 0. */ |
249 | /****************************************************************************************************************************************/ |
249 | /****************************************************************************************************************************************/ |
250 | File_t * LockFilePointer(void) |
250 | File_t * LockFilePointer(void) |
251 | { |
251 | { |
252 | uint8_t i; |
252 | uint8_t i; |
253 | File_t * File = 0; |
253 | File_t * File = 0; |
254 | for(i = 0; i < FILE_MAX_OPEN; i++) |
254 | for(i = 0; i < FILE_MAX_OPEN; i++) |
255 | { |
255 | { |
256 | if(FilePointer[i].State == FSTATE_UNUSED) // found an unused one |
256 | if(FilePointer[i].State == FSTATE_UNUSED) // found an unused one |
257 | { |
257 | { |
258 | File = &FilePointer[i]; // set pointer to that entry |
258 | File = &FilePointer[i]; // set pointer to that entry |
259 | FilePointer[i].State = FSTATE_USED; // mark it as used |
259 | FilePointer[i].State = FSTATE_USED; // mark it as used |
260 | break; |
260 | break; |
261 | } |
261 | } |
262 | } |
262 | } |
263 | return(File); |
263 | return(File); |
264 | } |
264 | } |
265 | 265 | ||
266 | /****************************************************************************************************************************************/ |
266 | /****************************************************************************************************************************************/ |
267 | /* Function: UnlockFilePointer(file_t *); */ |
267 | /* Function: UnlockFilePointer(file_t *); */ |
268 | /* */ |
268 | /* */ |
269 | /* Description: This function trys to unlock a file pointer. */ |
269 | /* Description: This function trys to unlock a file pointer. */ |
270 | /* */ |
270 | /* */ |
271 | /* Returnvalue: Returns 1 if file pointer was freed else 0. */ |
271 | /* Returnvalue: Returns 1 if file pointer was freed else 0. */ |
272 | /****************************************************************************************************************************************/ |
272 | /****************************************************************************************************************************************/ |
273 | uint8_t UnlockFilePointer(File_t * file) |
273 | uint8_t UnlockFilePointer(File_t * file) |
274 | { |
274 | { |
275 | uint8_t cnt; |
275 | uint8_t cnt; |
276 | if(file == NULL) return(0); |
276 | if(file == NULL) return(0); |
277 | for(cnt = 0; cnt < FILE_MAX_OPEN; cnt++) |
277 | for(cnt = 0; cnt < FILE_MAX_OPEN; cnt++) |
278 | { |
278 | { |
279 | if(&FilePointer[cnt] == file) // filepointer to be freed found? |
279 | if(&FilePointer[cnt] == file) // filepointer to be freed found? |
280 | { |
280 | { |
281 | file->State = FSTATE_UNUSED; |
281 | file->State = FSTATE_UNUSED; |
282 | file->FirstSectorOfFirstCluster = 0; // Sectorpointer to the first sector of the first datacluster of the file. |
282 | file->FirstSectorOfFirstCluster = 0; // Sectorpointer to the first sector of the first datacluster of the file. |
283 | file->FirstSectorOfCurrCluster = 0; |
283 | file->FirstSectorOfCurrCluster = 0; |
284 | file->SectorOfCurrCluster = 0; // Pointer to the cluster which is edited at the moment. |
284 | file->SectorOfCurrCluster = 0; // Pointer to the cluster which is edited at the moment. |
285 | file->SectorOfCurrCluster = 0; // The sector which is edited at the moment (cluster_pointer + sector_index). |
285 | file->SectorOfCurrCluster = 0; // The sector which is edited at the moment (cluster_pointer + sector_index). |
286 | file->ByteOfCurrSector = 0; // The bytelocation within the current sector (cluster_pointer + sector_index + byte_index). |
286 | file->ByteOfCurrSector = 0; // The bytelocation within the current sector (cluster_pointer + sector_index + byte_index). |
287 | file->Mode = 0; // mode of fileoperation (read,write) |
287 | file->Mode = 0; // mode of fileoperation (read,write) |
288 | file->Size = 0; // the size of the opend file in bytes. |
288 | file->Size = 0; // the size of the opend file in bytes. |
289 | file->Position = 0; // pointer to a character within the file 0 < fileposition < filesize |
289 | file->Position = 0; // pointer to a character within the file 0 < fileposition < filesize |
290 | file->SectorInCache = 0; // the last sector read, wich is still in the sectorbuffer. |
290 | file->SectorInCache = 0; // the last sector read, wich is still in the sectorbuffer. |
291 | file->DirectorySector = 0; // the sectorposition where the directoryentry has been made. |
291 | file->DirectorySector = 0; // the sectorposition where the directoryentry has been made. |
292 | file->DirectoryIndex = 0; // the index to the directoryentry within the specified sector. |
292 | file->DirectoryIndex = 0; // the index to the directoryentry within the specified sector. |
293 | file->Attribute = 0; // the attribute of the file opened. |
293 | file->Attribute = 0; // the attribute of the file opened. |
294 | file = NULL; |
294 | file = NULL; |
295 | return(1); |
295 | return(1); |
296 | } |
296 | } |
297 | } |
297 | } |
298 | return(0); |
298 | return(0); |
299 | } |
299 | } |
300 | 300 | ||
301 | /****************************************************************************************************************************************/ |
301 | /****************************************************************************************************************************************/ |
302 | /* Function: SeperateDirName(int8_t*, int8_t*); */ |
302 | /* Function: SeperateDirName(int8_t*, int8_t*); */ |
303 | /* */ |
303 | /* */ |
304 | /* Description: This function seperates the first dirname from filepath and brings them */ |
304 | /* Description: This function seperates the first dirname from filepath and brings them */ |
305 | /* into the needed format ('test.txt' -> 'TEST TXT') */ |
305 | /* into the needed format ('test.txt' -> 'TEST TXT') */ |
306 | /* The subpath is the pointer to the remaining substring if the filepath */ |
306 | /* The subpath is the pointer to the remaining substring if the filepath */ |
307 | /* */ |
307 | /* */ |
308 | /* Returnvalue: Return NULL on error or pointer to subpath */ |
308 | /* Returnvalue: Return NULL on error or pointer to subpath */ |
309 | /****************************************************************************************************************************************/ |
309 | /****************************************************************************************************************************************/ |
310 | int8_t* SeperateDirName(const int8_t *filepath, int8_t *dirname) |
310 | int8_t* SeperateDirName(const int8_t *filepath, int8_t *dirname) |
311 | { |
311 | { |
312 | int8_t* subpath = NULL; |
312 | int8_t* subpath = NULL; |
313 | uint8_t readpointer = 0; |
313 | uint8_t readpointer = 0; |
314 | uint8_t writepointer = 0; |
314 | uint8_t writepointer = 0; |
315 | 315 | ||
316 | // search subpath from beginning of filepath |
316 | // search subpath from beginning of filepath |
317 | subpath = NULL; |
317 | subpath = NULL; |
318 | readpointer = 0; |
318 | readpointer = 0; |
319 | if(filepath[0] == '/') readpointer = 1; // ignore first '/' |
319 | if(filepath[0] == '/') readpointer = 1; // ignore first '/' |
320 | while(subpath == NULL) // search the filepath until a subpath was found. |
320 | while(subpath == NULL) // search the filepath until a subpath was found. |
321 | { |
321 | { |
322 | if(((filepath[readpointer] == 0) || (filepath[readpointer] == '/'))) // if '/' found or end of filepath reached |
322 | if(((filepath[readpointer] == 0) || (filepath[readpointer] == '/'))) // if '/' found or end of filepath reached |
323 | { |
323 | { |
324 | subpath = (int8_t*)&filepath[readpointer]; // store the position of the first "/" found after the beginning of the filenpath |
324 | subpath = (int8_t*)&filepath[readpointer]; // store the position of the first "/" found after the beginning of the filenpath |
325 | } |
325 | } |
326 | readpointer++; |
326 | readpointer++; |
327 | } |
327 | } |
328 | 328 | ||
329 | // clear dirname with spaces |
329 | // clear dirname with spaces |
330 | dirname[11] = 0; // terminate dirname |
330 | dirname[11] = 0; // terminate dirname |
331 | for(writepointer = 0; writepointer < 11; writepointer++) dirname[writepointer] = ' '; |
331 | for(writepointer = 0; writepointer < 11; writepointer++) dirname[writepointer] = ' '; |
332 | writepointer = 0; |
332 | writepointer = 0; |
333 | // start seperating the dirname from the filepath. |
333 | // start seperating the dirname from the filepath. |
334 | readpointer = 0; |
334 | readpointer = 0; |
335 | if(filepath[0] == '/') readpointer = 1; // ignore first '/' |
335 | if(filepath[0] == '/') readpointer = 1; // ignore first '/' |
336 | while( &filepath[readpointer] < subpath) |
336 | while( &filepath[readpointer] < subpath) |
337 | { |
337 | { |
338 | if(writepointer >= 11) return(NULL); // dirname to long |
338 | if(writepointer >= 11) return(NULL); // dirname to long |
339 | if(filepath[readpointer] == '.') // seperating dirname and extension. |
339 | if(filepath[readpointer] == '.') // seperating dirname and extension. |
340 | { |
340 | { |
341 | if(writepointer <= 8) |
341 | if(writepointer <= 8) |
342 | { |
342 | { |
343 | readpointer++; // next character in filename |
343 | readpointer++; // next character in filename |
344 | writepointer = 8; // jump to start of extension |
344 | writepointer = 8; // jump to start of extension |
345 | } |
345 | } |
346 | else return(NULL); // dirbasename to long |
346 | else return(NULL); // dirbasename to long |
347 | } |
347 | } |
348 | else |
348 | else |
349 | { |
349 | { |
350 | if((0x60 < filepath[readpointer]) && (filepath[readpointer] < 0x7B)) |
350 | if((0x60 < filepath[readpointer]) && (filepath[readpointer] < 0x7B)) |
351 | { |
351 | { |
352 | dirname[writepointer] = (filepath[readpointer] - 0x20); // all characters must be upper case. |
352 | dirname[writepointer] = (filepath[readpointer] - 0x20); // all characters must be upper case. |
353 | } |
353 | } |
354 | else |
354 | else |
355 | { |
355 | { |
356 | dirname[writepointer] = filepath[readpointer]; |
356 | dirname[writepointer] = filepath[readpointer]; |
357 | } |
357 | } |
358 | readpointer++; |
358 | readpointer++; |
359 | writepointer++; |
359 | writepointer++; |
360 | } |
360 | } |
361 | } |
361 | } |
362 | return(subpath); |
362 | return(subpath); |
363 | } |
363 | } |
364 | 364 | ||
365 | 365 | ||
366 | /**************************************************************************************************************************************+*/ |
366 | /**************************************************************************************************************************************+*/ |
367 | /* Function: Fat16ClusterToSector( uint16_t cluster); */ |
367 | /* Function: Fat16ClusterToSector( uint16_t cluster); */ |
368 | /* */ |
368 | /* */ |
369 | /* Description: This function converts a cluster number given by the fat to the corresponding */ |
369 | /* Description: This function converts a cluster number given by the fat to the corresponding */ |
370 | /* sector that points to the start of the data area that is represented by the cluster number. */ |
370 | /* sector that points to the start of the data area that is represented by the cluster number. */ |
371 | /* */ |
371 | /* */ |
372 | /* Returnvalue: The sector number with the data area of the given cluster */ |
372 | /* Returnvalue: The sector number with the data area of the given cluster */ |
373 | /****************************************************************************************************************************************/ |
373 | /****************************************************************************************************************************************/ |
374 | uint32_t Fat16ClusterToSector(uint16_t cluster) |
374 | uint32_t Fat16ClusterToSector(uint16_t cluster) |
375 | { |
375 | { |
376 | if(!Partition.IsValid) return 0; |
376 | if(!Partition.IsValid) return 0; |
377 | if (cluster < 2) cluster = 2; // the 0. and 1. cluster in the fat are used for the media descriptor |
377 | if (cluster < 2) cluster = 2; // the 0. and 1. cluster in the fat are used for the media descriptor |
378 | return ( (cluster - 2) * Partition.SectorsPerCluster) + Partition.FirstDataSector; // the first data sector is represented by the 2nd cluster |
378 | return ( (cluster - 2) * Partition.SectorsPerCluster) + Partition.FirstDataSector; // the first data sector is represented by the 2nd cluster |
379 | } |
379 | } |
380 | 380 | ||
381 | /****************************************************************************************************************************************/ |
381 | /****************************************************************************************************************************************/ |
382 | /* Function: SectorToFat16Cluster( uint32_t sector); */ |
382 | /* Function: SectorToFat16Cluster( uint32_t sector); */ |
383 | /* */ |
383 | /* */ |
384 | /* Description: This function converts a given sector number given to the corresponding */ |
384 | /* Description: This function converts a given sector number given to the corresponding */ |
385 | /* cluster number in the fat that represents this data area. */ |
385 | /* cluster number in the fat that represents this data area. */ |
386 | /* */ |
386 | /* */ |
387 | /* Returnvalue: The cluster number representing the data area of the sector. */ |
387 | /* Returnvalue: The cluster number representing the data area of the sector. */ |
388 | /****************************************************************************************************************************************/ |
388 | /****************************************************************************************************************************************/ |
389 | uint16_t SectorToFat16Cluster(uint32_t sector) |
389 | uint16_t SectorToFat16Cluster(uint32_t sector) |
390 | { |
390 | { |
391 | if(!Partition.IsValid) return 0; |
391 | if(!Partition.IsValid) return 0; |
392 | return ((uint16_t)((sector - Partition.FirstDataSector) / Partition.SectorsPerCluster) + 2); |
392 | return ((uint16_t)((sector - Partition.FirstDataSector) / Partition.SectorsPerCluster) + 2); |
393 | } |
393 | } |
394 | 394 | ||
395 | 395 | ||
396 | /****************************************************************************************************************************************/ |
396 | /****************************************************************************************************************************************/ |
397 | /* Function: Fat16_Deinit(void); */ |
397 | /* Function: Fat16_Deinit(void); */ |
398 | /* */ |
398 | /* */ |
399 | /* Description: This function uninitializes the fat 16 api */ |
399 | /* Description: This function uninitializes the fat 16 api */ |
400 | /* */ |
400 | /* */ |
401 | /* Returnvalue: The function returns "0" on success */ |
401 | /* Returnvalue: The function returns "0" on success */ |
402 | /****************************************************************************************************************************************/ |
402 | /****************************************************************************************************************************************/ |
403 | uint8_t Fat16_Deinit(void) |
403 | uint8_t Fat16_Deinit(void) |
404 | { |
404 | { |
405 | int16_t returnvalue = 0; |
405 | int16_t returnvalue = 0; |
406 | uint8_t cnt; |
406 | uint8_t cnt; |
407 | // declare the filepointers as unused. |
407 | // declare the filepointers as unused. |
408 | for(cnt = 0; cnt < FILE_MAX_OPEN; cnt++) |
408 | for(cnt = 0; cnt < FILE_MAX_OPEN; cnt++) |
409 | { |
409 | { |
410 | if(FilePointer[cnt].State == FSTATE_USED) |
410 | if(FilePointer[cnt].State == FSTATE_USED) |
411 | { |
411 | { |
412 | returnvalue += fclose_(&FilePointer[cnt]); // try to close open file pointers |
412 | returnvalue += fclose_(&FilePointer[cnt]); // try to close open file pointers |
413 | } |
413 | } |
414 | 414 | ||
415 | } |
415 | } |
416 | SDC_Deinit(); // uninitialize interface to sd-card |
416 | SDC_Deinit(); // uninitialize interface to sd-card |
417 | Partition.IsValid = 0; // mark data in partition structure as invalid |
417 | Partition.IsValid = 0; // mark data in partition structure as invalid |
418 | return(returnvalue); |
418 | return(returnvalue); |
419 | } |
419 | } |
420 | 420 | ||
421 | /****************************************************************************************************************************************/ |
421 | /****************************************************************************************************************************************/ |
422 | /* Function: Fat16_Init(void); */ |
422 | /* Function: Fat16_Init(void); */ |
423 | /* */ |
423 | /* */ |
424 | /* Description: This function reads the Masterbootrecord and finds the position of the Volumebootrecord, the FAT and the Rootdir */ |
424 | /* Description: This function reads the Masterbootrecord and finds the position of the Volumebootrecord, the FAT and the Rootdir */ |
425 | /* and stores the information in global variables. */ |
425 | /* and stores the information in global variables. */ |
426 | /* */ |
426 | /* */ |
427 | /* Returnvalue: The function returns "0" if the filesystem is initialized. */ |
427 | /* Returnvalue: The function returns "0" if the filesystem is initialized. */ |
428 | /****************************************************************************************************************************************/ |
428 | /****************************************************************************************************************************************/ |
429 | uint8_t Fat16_Init(void) |
429 | uint8_t Fat16_Init(void) |
430 | { |
430 | { |
431 | uint8_t cnt = 0; |
431 | uint8_t cnt = 0; |
432 | uint32_t partitionfirstsector; |
432 | uint32_t partitionfirstsector; |
433 | VBR_Entry_t *VBR; |
433 | VBR_Entry_t *VBR; |
434 | MBR_Entry_t *MBR; |
434 | MBR_Entry_t *MBR; |
435 | File_t *file; |
435 | File_t *file; |
436 | uint8_t result = 0; |
436 | uint8_t result = 0; |
437 | 437 | ||
438 | printf("\r\n FAT16 init..."); |
438 | printf("\r\n FAT16 init..."); |
439 | Partition.IsValid = 0; |
439 | Partition.IsValid = 0; |
440 | 440 | ||
441 | // declare the filepointers as unused. |
441 | // declare the filepointers as unused. |
442 | for(cnt = 0; cnt < FILE_MAX_OPEN; cnt++) |
442 | for(cnt = 0; cnt < FILE_MAX_OPEN; cnt++) |
443 | { |
443 | { |
444 | FilePointer[cnt].State = FSTATE_UNUSED; |
444 | FilePointer[cnt].State = FSTATE_UNUSED; |
445 | } |
445 | } |
446 | // set current file pinter to first position in list |
446 | // set current file pinter to first position in list |
447 | file = &FilePointer[0]; |
447 | file = &FilePointer[0]; |
448 | 448 | ||
449 | // try to initialise the sd-card. |
449 | // try to initialise the sd-card. |
450 | if(SD_SUCCESS != SDC_Init()) |
450 | if(SD_SUCCESS != SDC_Init()) |
451 | { |
451 | { |
452 | printf("SD-Card could not be initialized."); |
452 | printf("SD-Card could not be initialized."); |
453 | result = 1; |
453 | result = 1; |
454 | goto end; |
454 | goto end; |
455 | } |
455 | } |
456 | 456 | ||
457 | // SD-Card is initialized successfully |
457 | // SD-Card is initialized successfully |
458 | if(SD_SUCCESS != SDC_GetSector((uint32_t)MBR_SECTOR,file->Cache)) // Read the MasterBootRecord |
458 | if(SD_SUCCESS != SDC_GetSector((uint32_t)MBR_SECTOR,file->Cache)) // Read the MasterBootRecord |
459 | { |
459 | { |
460 | printf("Error reading the MBR."); |
460 | printf("Error reading the MBR."); |
461 | result = 2; |
461 | result = 2; |
462 | goto end; |
462 | goto end; |
463 | } |
463 | } |
464 | MBR = (MBR_Entry_t *)file->Cache; // Enter the MBR using the structure MBR_Entry_t. |
464 | MBR = (MBR_Entry_t *)file->Cache; // Enter the MBR using the structure MBR_Entry_t. |
465 | if((MBR->PartitionEntry1.Type == PART_TYPE_FAT16_ST_32_MB) || |
465 | if((MBR->PartitionEntry1.Type == PART_TYPE_FAT16_ST_32_MB) || |
466 | (MBR->PartitionEntry1.Type == PART_TYPE_FAT16_LT_32_MB) || |
466 | (MBR->PartitionEntry1.Type == PART_TYPE_FAT16_LT_32_MB) || |
467 | (MBR->PartitionEntry1.Type == PART_TYPE_FAT16LBA)) |
467 | (MBR->PartitionEntry1.Type == PART_TYPE_FAT16LBA)) |
468 | { |
468 | { |
469 | // get sector offset 1st partition |
469 | // get sector offset 1st partition |
470 | partitionfirstsector = MBR->PartitionEntry1.NoSectorsBeforePartition; |
470 | partitionfirstsector = MBR->PartitionEntry1.NoSectorsBeforePartition; |
471 | // Start of Partition is the Volume Boot Sector |
471 | // Start of Partition is the Volume Boot Sector |
472 | if(SD_SUCCESS != SDC_GetSector(partitionfirstsector,file->Cache)) // Read the volume boot record |
472 | if(SD_SUCCESS != SDC_GetSector(partitionfirstsector,file->Cache)) // Read the volume boot record |
473 | { |
473 | { |
474 | printf("Error reading the VBR."); |
474 | printf("Error reading the VBR."); |
475 | result = 3; |
475 | result = 3; |
476 | goto end; |
476 | goto end; |
477 | } |
477 | } |
478 | } |
478 | } |
479 | else // maybe the medium has no partition assuming sector 0 is the vbr |
479 | else // maybe the medium has no partition assuming sector 0 is the vbr |
480 | { |
480 | { |
481 | partitionfirstsector = 0; |
481 | partitionfirstsector = 0; |
482 | } |
482 | } |
483 | 483 | ||
484 | VBR = (VBR_Entry_t *) file->Cache; // Enter the VBR using the structure VBR_Entry_t. |
484 | VBR = (VBR_Entry_t *) file->Cache; // Enter the VBR using the structure VBR_Entry_t. |
485 | if(VBR->BytesPerSector != BYTES_PER_SECTOR) |
485 | if(VBR->BytesPerSector != BYTES_PER_SECTOR) |
486 | { |
486 | { |
487 | printf("VBR: Sector size not supported."); |
487 | printf("VBR: Sector size not supported."); |
488 | result = 4; |
488 | result = 4; |
489 | goto end; |
489 | goto end; |
490 | } |
490 | } |
491 | Partition.SectorsPerCluster = VBR->SectorsPerCluster; // Number of sectors per cluster. Depends on the memorysize of the sd-card. |
491 | Partition.SectorsPerCluster = VBR->SectorsPerCluster; // Number of sectors per cluster. Depends on the memorysize of the sd-card. |
492 | Partition.FatCopies = VBR->NoFATCopies; // Number of fatcopies. |
492 | Partition.FatCopies = VBR->NoFATCopies; // Number of fatcopies. |
493 | Partition.MaxRootEntries = VBR->MaxRootEntries; // How many Entries are possible in the rootdirectory (FAT16 allows max. 512 entries). |
493 | Partition.MaxRootEntries = VBR->MaxRootEntries; // How many Entries are possible in the rootdirectory (FAT16 allows max. 512 entries). |
494 | Partition.SectorsPerFat = VBR->SectorsPerFAT; // The number of sectors per FAT. |
494 | Partition.SectorsPerFat = VBR->SectorsPerFAT; // The number of sectors per FAT. |
495 | 495 | ||
496 | /* Calculate the sectorpositon of the FAT, the Rootdirectory and the first Datacluster. */ |
496 | /* Calculate the sectorpositon of the FAT, the Rootdirectory and the first Datacluster. */ |
497 | // Calculate the position of the FileAllocationTable: |
497 | // Calculate the position of the FileAllocationTable: |
498 | // Start + # of Reserved Sectors |
498 | // Start + # of Reserved Sectors |
499 | Partition.FirstFatSector = (uint32_t)(partitionfirstsector + (uint32_t)(VBR->ReservedSectors)); |
499 | Partition.FirstFatSector = (uint32_t)(partitionfirstsector + (uint32_t)(VBR->ReservedSectors)); |
500 | // Calculate the position of the Rootdirectory: |
500 | // Calculate the position of the Rootdirectory: |
501 | // Start + # of Reserved Sectors + (# of Sectors Per FAT * # of FAT Copies) |
501 | // Start + # of Reserved Sectors + (# of Sectors Per FAT * # of FAT Copies) |
502 | Partition.FirstRootDirSector = Partition.FirstFatSector + (uint32_t)((uint32_t)Partition.SectorsPerFat*(uint32_t)Partition.FatCopies); |
502 | Partition.FirstRootDirSector = Partition.FirstFatSector + (uint32_t)((uint32_t)Partition.SectorsPerFat*(uint32_t)Partition.FatCopies); |
503 | // Calculate the position of the first datacluster: |
503 | // Calculate the position of the first datacluster: |
504 | // Start + # of Reserved + (# of Sectors Per FAT * # of FAT Copies) + ((Maximum Root Directory Entries * 32) / Bytes per Sector) |
504 | // Start + # of Reserved + (# of Sectors Per FAT * # of FAT Copies) + ((Maximum Root Directory Entries * 32) / Bytes per Sector) |
505 | Partition.FirstDataSector = Partition.FirstRootDirSector + (uint32_t)(Partition.MaxRootEntries>>4); // assuming 512 Byte Per Sector |
505 | Partition.FirstDataSector = Partition.FirstRootDirSector + (uint32_t)(Partition.MaxRootEntries>>4); // assuming 512 Byte Per Sector |
506 | // Calculate the last data sector |
506 | // Calculate the last data sector |
507 | if(VBR->NoSectors == 0) |
507 | if(VBR->NoSectors == 0) |
508 | { |
508 | { |
509 | printf("VBR: Bad number of sectors."); |
509 | printf("VBR: Bad number of sectors."); |
510 | result = 5; |
510 | result = 5; |
511 | goto end; |
511 | goto end; |
512 | } |
512 | } |
513 | Partition.LastDataSector = Partition.FirstDataSector + VBR->NoSectors - 1; |
513 | Partition.LastDataSector = Partition.FirstDataSector + VBR->NoSectors - 1; |
514 | // check for FAT16 in VBR of first partition |
514 | // check for FAT16 in VBR of first partition |
515 | if(!((VBR->FATName[0]=='F') && (VBR->FATName[1]=='A') && (VBR->FATName[2]=='T') && (VBR->FATName[3]=='1')&&(VBR->FATName[4]=='6'))) |
515 | if(!((VBR->FATName[0]=='F') && (VBR->FATName[1]=='A') && (VBR->FATName[2]=='T') && (VBR->FATName[3]=='1')&&(VBR->FATName[4]=='6'))) |
516 | { |
516 | { |
517 | printf("VBR: Partition ist not FAT16 type."); |
517 | printf("VBR: Partition ist not FAT16 type."); |
518 | result = 6; |
518 | result = 6; |
519 | goto end; |
519 | goto end; |
520 | } |
520 | } |
521 | Partition.IsValid = 1; // mark data in partition structure as valid |
521 | Partition.IsValid = 1; // mark data in partition structure as valid |
522 | result = 0; |
522 | result = 0; |
523 | end: |
523 | end: |
524 | if(result != 0) Fat16_Deinit(); |
524 | if(result != 0) Fat16_Deinit(); |
525 | else printf(" ...ok"); |
525 | else printf(" ...ok"); |
526 | return(result); |
526 | return(result); |
527 | } |
527 | } |
528 | 528 | ||
529 | /****************************************************************************************************************************************/ |
529 | /****************************************************************************************************************************************/ |
530 | /* Function: Fat16_IsValid(void); */ |
530 | /* Function: Fat16_IsValid(void); */ |
531 | /* */ |
531 | /* */ |
532 | /* Description: This function return the Fat 15 filesystem state */ |
532 | /* Description: This function return the Fat 15 filesystem state */ |
533 | /* */ |
533 | /* */ |
534 | /* Returnvalue: The function returns "1" on success */ |
534 | /* Returnvalue: The function returns "1" on success */ |
535 | /****************************************************************************************************************************************/ |
535 | /****************************************************************************************************************************************/ |
536 | uint8_t Fat16_IsValid(void) |
536 | uint8_t Fat16_IsValid(void) |
537 | { |
537 | { |
538 | return(Partition.IsValid); |
538 | return(Partition.IsValid); |
539 | } |
539 | } |
540 | 540 | ||
541 | /****************************************************************************************************************************************/ |
541 | /****************************************************************************************************************************************/ |
542 | /* Function: ClearCurrCluster(File_t*); */ |
542 | /* Function: ClearCurrCluster(File_t*); */ |
543 | /* */ |
543 | /* */ |
544 | /* Description: This function fills the current cluster with 0. */ |
544 | /* Description: This function fills the current cluster with 0. */ |
545 | /* */ |
545 | /* */ |
546 | /* Returnvalue: The function returns 1 on success else 0. */ |
546 | /* Returnvalue: The function returns 1 on success else 0. */ |
547 | /****************************************************************************************************************************************/ |
547 | /****************************************************************************************************************************************/ |
548 | uint8_t ClearCurrCluster(File_t * file) |
548 | uint8_t ClearCurrCluster(File_t * file) |
549 | { |
549 | { |
550 | uint8_t retvalue = 1; |
550 | uint8_t retvalue = 1; |
551 | uint32_t i; |
551 | uint32_t i; |
552 | 552 | ||
553 | if((!Partition.IsValid) || (file == NULL)) return(0); |
553 | if((!Partition.IsValid) || (file == NULL)) return(0); |
554 | 554 | ||
555 | for(i = 0; i < BYTES_PER_SECTOR; i++) file->Cache[i] = 0; // clear file cache |
555 | for(i = 0; i < BYTES_PER_SECTOR; i++) file->Cache[i] = 0; // clear file cache |
556 | for(i = 0; i < Partition.SectorsPerCluster; i++) |
556 | for(i = 0; i < Partition.SectorsPerCluster; i++) |
557 | { |
557 | { |
558 | file->SectorInCache = file->FirstSectorOfCurrCluster + i; |
558 | file->SectorInCache = file->FirstSectorOfCurrCluster + i; |
559 | if(SD_SUCCESS != SDC_PutSector(file->SectorInCache, file->Cache)) |
559 | if(SD_SUCCESS != SDC_PutSector(file->SectorInCache, file->Cache)) |
560 | { |
560 | { |
561 | Fat16_Deinit(); |
561 | Fat16_Deinit(); |
562 | retvalue = 0; |
562 | retvalue = 0; |
563 | } |
563 | } |
564 | } |
564 | } |
565 | return(retvalue); |
565 | return(retvalue); |
566 | } |
566 | } |
567 | 567 | ||
568 | /*****************************************************************************************************************************************/ |
568 | /*****************************************************************************************************************************************/ |
569 | /* Function: GetNextCluster(File_t* ); */ |
569 | /* Function: GetNextCluster(File_t* ); */ |
570 | /* */ |
570 | /* */ |
571 | /* Description: This function finds the next datacluster of the file specified with File *File. */ |
571 | /* Description: This function finds the next datacluster of the file specified with File *File. */ |
572 | /* */ |
572 | /* */ |
573 | /* Returnvalue: The function returns the next cluster or 0 if the last cluster has already reached. */ |
573 | /* Returnvalue: The function returns the next cluster or 0 if the last cluster has already reached. */ |
574 | /*****************************************************************************************************************************************/ |
574 | /*****************************************************************************************************************************************/ |
575 | uint16_t GetNextCluster(File_t * file) |
575 | uint16_t GetNextCluster(File_t * file) |
576 | { |
576 | { |
577 | uint16_t cluster = 0; |
577 | uint16_t cluster = 0; |
578 | uint32_t fat_byte_offset, sector, byte; |
578 | uint32_t fat_byte_offset, sector, byte; |
579 | Fat16Entry_t * fat; |
579 | Fat16Entry_t * fat; |
580 | 580 | ||
581 | if((!Partition.IsValid) || (file == NULL)) return(cluster); |
581 | if((!Partition.IsValid) || (file == NULL)) return(cluster); |
582 | // if sector is within the data area |
582 | // if sector is within the data area |
583 | if((Partition.FirstDataSector <= file->FirstSectorOfCurrCluster)&& (file->FirstSectorOfCurrCluster <= Partition.LastDataSector)) |
583 | if((Partition.FirstDataSector <= file->FirstSectorOfCurrCluster)&& (file->FirstSectorOfCurrCluster <= Partition.LastDataSector)) |
584 | { |
584 | { |
585 | // determine current file cluster |
585 | // determine current file cluster |
586 | cluster = SectorToFat16Cluster(file->FirstSectorOfCurrCluster); |
586 | cluster = SectorToFat16Cluster(file->FirstSectorOfCurrCluster); |
587 | // calculate byte offset in the fat for corresponding entry |
587 | // calculate byte offset in the fat for corresponding entry |
588 | fat_byte_offset = ((uint32_t)cluster)<<1; // two FAT bytes (16 bits) for every cluster |
588 | fat_byte_offset = ((uint32_t)cluster)<<1; // two FAT bytes (16 bits) for every cluster |
589 | // calculate the sector that contains the current cluster within the fat |
589 | // calculate the sector that contains the current cluster within the fat |
590 | sector = Partition.FirstFatSector + ( fat_byte_offset / BYTES_PER_SECTOR); |
590 | sector = Partition.FirstFatSector + ( fat_byte_offset / BYTES_PER_SECTOR); |
591 | // calculate byte offset of the current cluster within that fat sector |
591 | // calculate byte offset of the current cluster within that fat sector |
592 | byte = fat_byte_offset % BYTES_PER_SECTOR; |
592 | byte = fat_byte_offset % BYTES_PER_SECTOR; |
593 | // read this sector to the file cache |
593 | // read this sector to the file cache |
594 | if(file->SectorInCache != sector) |
594 | if(file->SectorInCache != sector) |
595 | { |
595 | { |
596 | file->SectorInCache = sector; // update sector stored in buffer |
596 | file->SectorInCache = sector; // update sector stored in buffer |
597 | if(SD_SUCCESS != SDC_GetSector(file->SectorInCache, file->Cache)) // read sector from sd-card |
597 | if(SD_SUCCESS != SDC_GetSector(file->SectorInCache, file->Cache)) // read sector from sd-card |
598 | { |
598 | { |
599 | Fat16_Deinit(); |
599 | Fat16_Deinit(); |
600 | return (cluster); |
600 | return (cluster); |
601 | } |
601 | } |
602 | } |
602 | } |
603 | // read the next cluster from cache |
603 | // read the next cluster from cache |
604 | fat = (Fat16Entry_t *)(&(file->Cache[byte])); |
604 | fat = (Fat16Entry_t *)(&(file->Cache[byte])); |
605 | cluster = fat->NextCluster; |
605 | cluster = fat->NextCluster; |
606 | // if last cluster fat entry |
606 | // if last cluster fat entry |
607 | if(FAT16_CLUSTER_LAST_MIN <= cluster) |
607 | if(FAT16_CLUSTER_LAST_MIN <= cluster) |
608 | { |
608 | { |
609 | cluster = 0; |
609 | cluster = 0; |
610 | } |
610 | } |
611 | else |
611 | else |
612 | { |
612 | { |
613 | file->FirstSectorOfCurrCluster = Fat16ClusterToSector(cluster); |
613 | file->FirstSectorOfCurrCluster = Fat16ClusterToSector(cluster); |
614 | file->SectorOfCurrCluster = 0; |
614 | file->SectorOfCurrCluster = 0; |
615 | file->ByteOfCurrSector = 0; |
615 | file->ByteOfCurrSector = 0; |
616 | } |
616 | } |
617 | } |
617 | } |
618 | return(cluster); |
618 | return(cluster); |
619 | } |
619 | } |
620 | 620 | ||
621 | 621 | ||
622 | /****************************************************************************************************************************************/ |
622 | /****************************************************************************************************************************************/ |
623 | /* Function: FindNextFreeCluster(File_t *); */ |
623 | /* Function: FindNextFreeCluster(File_t *); */ |
624 | /* */ |
624 | /* */ |
625 | /* Description: This function looks in the fat to find the next free cluster */ |
625 | /* Description: This function looks in the fat to find the next free cluster */ |
626 | /* */ |
626 | /* */ |
627 | /* Returnvalue: The function returns the cluster number of the next free cluster found within the fat. */ |
627 | /* Returnvalue: The function returns the cluster number of the next free cluster found within the fat. */ |
628 | /****************************************************************************************************************************************/ |
628 | /****************************************************************************************************************************************/ |
629 | uint16_t FindNextFreeCluster(File_t *file) |
629 | uint16_t FindNextFreeCluster(File_t *file) |
630 | { |
630 | { |
631 | uint32_t fat_sector; // current sector within the fat relative to the first sector of the fat. |
631 | uint32_t fat_sector; // current sector within the fat relative to the first sector of the fat. |
632 | uint32_t curr_sector; // current sector |
632 | uint32_t curr_sector; // current sector |
633 | uint16_t fat_entry; // index to an fatentry within the actual sector (256 fatentries are possible within one sector). |
633 | uint16_t fat_entry; // index to an fatentry within the actual sector (256 fatentries are possible within one sector). |
634 | uint16_t free_cluster = 0; // next free cluster number. |
634 | uint16_t free_cluster = 0; // next free cluster number. |
635 | Fat16Entry_t * fat; |
635 | Fat16Entry_t * fat; |
636 | 636 | ||
637 | if((!Partition.IsValid) || (file == NULL)) return(0); |
637 | if((!Partition.IsValid) || (file == NULL)) return(0); |
638 | 638 | ||
639 | // start searching for an empty cluster at the beginning of the fat. |
639 | // start searching for an empty cluster at the beginning of the fat. |
640 | fat_sector = 0; |
640 | fat_sector = 0; |
641 | do |
641 | do |
642 | { |
642 | { |
643 | curr_sector = Partition.FirstFatSector + fat_sector; // calculate sector to read |
643 | curr_sector = Partition.FirstFatSector + fat_sector; // calculate sector to read |
644 | file->SectorInCache = curr_sector; // upate the sector number of file cache. |
644 | file->SectorInCache = curr_sector; // upate the sector number of file cache. |
645 | if( SD_SUCCESS != SDC_GetSector(file->SectorInCache, file->Cache)) // read sector of fat from sd-card. |
645 | if( SD_SUCCESS != SDC_GetSector(file->SectorInCache, file->Cache)) // read sector of fat from sd-card. |
646 | { |
646 | { |
647 | Fat16_Deinit(); |
647 | Fat16_Deinit(); |
648 | return(free_cluster); |
648 | return(free_cluster); |
649 | } |
649 | } |
650 | 650 | ||
651 | fat = (Fat16Entry_t *)file->Cache; // set fat pointer to file cache |
651 | fat = (Fat16Entry_t *)file->Cache; // set fat pointer to file cache |
652 | 652 | ||
653 | for(fat_entry = 0; fat_entry < FAT16_ENTRIES_PER_SECTOR; fat_entry++) // look for an free cluster at all entries in this sector of the fat. |
653 | for(fat_entry = 0; fat_entry < FAT16_ENTRIES_PER_SECTOR; fat_entry++) // look for an free cluster at all entries in this sector of the fat. |
654 | { |
654 | { |
655 | if(fat[fat_entry].NextCluster == FAT16_CLUSTER_FREE) // empty cluster found!! |
655 | if(fat[fat_entry].NextCluster == FAT16_CLUSTER_FREE) // empty cluster found!! |
656 | { |
656 | { |
657 | fat[fat_entry].NextCluster = FAT16_CLUSTER_LAST_MAX; // mark this fat-entry as used |
657 | fat[fat_entry].NextCluster = FAT16_CLUSTER_LAST_MAX; // mark this fat-entry as used |
658 | if(SD_SUCCESS != SDC_PutSector(file->SectorInCache, file->Cache)) // and save the sector at the sd-card. |
658 | if(SD_SUCCESS != SDC_PutSector(file->SectorInCache, file->Cache)) // and save the sector at the sd-card. |
659 | { |
659 | { |
660 | Fat16_Deinit(); |
660 | Fat16_Deinit(); |
661 | return(free_cluster); |
661 | return(free_cluster); |
662 | } |
662 | } |
663 | free_cluster = (uint16_t)(fat_sector * FAT16_ENTRIES_PER_SECTOR + (uint32_t)fat_entry); |
663 | free_cluster = (uint16_t)(fat_sector * FAT16_ENTRIES_PER_SECTOR + (uint32_t)fat_entry); |
664 | fat_entry = FAT16_ENTRIES_PER_SECTOR; // terminate the search for a free cluster in this sector. |
664 | fat_entry = FAT16_ENTRIES_PER_SECTOR; // terminate the search for a free cluster in this sector. |
665 | } |
665 | } |
666 | } |
666 | } |
667 | fat_sector++; // continue the search in next fat sector |
667 | fat_sector++; // continue the search in next fat sector |
668 | // repeat until the end of the fat is reached and no free cluster has been found so far |
668 | // repeat until the end of the fat is reached and no free cluster has been found so far |
669 | }while((fat_sector < Partition.SectorsPerFat) && (!free_cluster)); |
669 | }while((fat_sector < Partition.SectorsPerFat) && (!free_cluster)); |
670 | return(free_cluster); |
670 | return(free_cluster); |
671 | } |
671 | } |
672 | 672 | ||
673 | 673 | ||
674 | /****************************************************************************************************************************************************/ |
674 | /****************************************************************************************************************************************************/ |
675 | /* Function: int16_t fseek_(File_t *, int32_t *, uint8_t) */ |
675 | /* Function: int16_t fseek_(File_t *, int32_t *, uint8_t) */ |
676 | /* */ |
676 | /* */ |
677 | /* Description: This function sets the pointer of the stream relative to the position */ |
677 | /* Description: This function sets the pointer of the stream relative to the position */ |
678 | /* specified by origin (SEEK_SET, SEEK_CUR, SEEK_END) */ |
678 | /* specified by origin (SEEK_SET, SEEK_CUR, SEEK_END) */ |
679 | /* Returnvalue: Is 1 if seek was successful */ |
679 | /* Returnvalue: Is 1 if seek was successful */ |
680 | /****************************************************************************************************************************************************/ |
680 | /****************************************************************************************************************************************************/ |
681 | int16_t fseek_(File_t * const file, int32_t offset, int16_t origin) |
681 | int16_t fseek_(File_t * const file, int32_t offset, int16_t origin) |
682 | { |
682 | { |
683 | int32_t fposition = 0; |
683 | int32_t fposition = 0; |
684 | int16_t retvalue = 1; |
684 | int16_t retvalue = 1; |
685 | 685 | ||
686 | if((!Partition.IsValid) || (file == NULL)) return(0); |
686 | if((!Partition.IsValid) || (file == NULL)) return(0); |
687 | switch(origin) |
687 | switch(origin) |
688 | { |
688 | { |
689 | case SEEK_SET: // Fileposition relative to the beginning of the file. |
689 | case SEEK_SET: // Fileposition relative to the beginning of the file. |
690 | fposition = 0; |
690 | fposition = 0; |
691 | break; |
691 | break; |
692 | case SEEK_END: // Fileposition relative to the end of the file. |
692 | case SEEK_END: // Fileposition relative to the end of the file. |
693 | fposition = (int32_t)file->Size; |
693 | fposition = (int32_t)file->Size; |
694 | break; |
694 | break; |
695 | case SEEK_CUR: // Fileposition relative to the current position of the file. |
695 | case SEEK_CUR: // Fileposition relative to the current position of the file. |
696 | default: |
696 | default: |
697 | fposition = file->Position; |
697 | fposition = file->Position; |
698 | break; |
698 | break; |
699 | } |
699 | } |
700 | 700 | ||
701 | fposition += offset; |
701 | fposition += offset; |
702 | 702 | ||
703 | if((fposition >= 0) && (fposition <= (int32_t)file->Size)) // is the pointer still within the file? |
703 | if((fposition >= 0) && (fposition <= (int32_t)file->Size)) // is the pointer still within the file? |
704 | { |
704 | { |
705 | // reset file position to start of the file |
705 | // reset file position to start of the file |
706 | file->FirstSectorOfCurrCluster = file->FirstSectorOfFirstCluster; |
706 | file->FirstSectorOfCurrCluster = file->FirstSectorOfFirstCluster; |
707 | file->SectorOfCurrCluster = 0; |
707 | file->SectorOfCurrCluster = 0; |
708 | file->ByteOfCurrSector = 0; |
708 | file->ByteOfCurrSector = 0; |
709 | file->Position = 0; |
709 | file->Position = 0; |
710 | 710 | ||
711 | while(file->Position < fposition) // repeat until the current position is less than target |
711 | while(file->Position < fposition) // repeat until the current position is less than target |
712 | { |
712 | { |
713 | file->Position++; // increment file position |
713 | file->Position++; // increment file position |
714 | file->ByteOfCurrSector++; // next byte in current sector |
714 | file->ByteOfCurrSector++; // next byte in current sector |
715 | if(file->ByteOfCurrSector >= BYTES_PER_SECTOR) |
715 | if(file->ByteOfCurrSector >= BYTES_PER_SECTOR) |
716 | { |
716 | { |
717 | file->ByteOfCurrSector = 0; // reading at the beginning of new sector. |
717 | file->ByteOfCurrSector = 0; // reading at the beginning of new sector. |
718 | file->SectorOfCurrCluster++; // continue reading in next sector |
718 | file->SectorOfCurrCluster++; // continue reading in next sector |
719 | if(file->SectorOfCurrCluster >= Partition.SectorsPerCluster) // if end of cluster is reached, the next datacluster has to be searched in the FAT. |
719 | if(file->SectorOfCurrCluster >= Partition.SectorsPerCluster) // if end of cluster is reached, the next datacluster has to be searched in the FAT. |
720 | { |
720 | { |
721 | if(GetNextCluster(file)) // Sets the clusterpointer of the file to the next datacluster. |
721 | if(GetNextCluster(file)) // Sets the clusterpointer of the file to the next datacluster. |
722 | { |
722 | { |
723 | file->SectorOfCurrCluster = 0; |
723 | file->SectorOfCurrCluster = 0; |
724 | } |
724 | } |
725 | else // the last cluster was allready reached |
725 | else // the last cluster was allready reached |
726 | { |
726 | { |
727 | file->SectorOfCurrCluster--; // jump back to the ast sector in the last cluster |
727 | file->SectorOfCurrCluster--; // jump back to the ast sector in the last cluster |
728 | file->ByteOfCurrSector = BYTES_PER_SECTOR; // set ByteOfCurrSector one byte over sector end |
728 | file->ByteOfCurrSector = BYTES_PER_SECTOR; // set ByteOfCurrSector one byte over sector end |
729 | } |
729 | } |
730 | } |
730 | } |
731 | } |
731 | } |
732 | } |
732 | } |
733 | } |
733 | } |
734 | if(file->Position == fposition) retvalue = 0; |
734 | if(file->Position == fposition) retvalue = 0; |
735 | return(retvalue); |
735 | return(retvalue); |
736 | } |
736 | } |
737 | 737 | ||
738 | 738 | ||
739 | /****************************************************************************************************************************************/ |
739 | /****************************************************************************************************************************************/ |
740 | /* Function: uint16_t DeleteClusterChain(File *file); */ |
740 | /* Function: uint16_t DeleteClusterChain(File *file); */ |
741 | /* */ |
741 | /* */ |
742 | /* Description: This function trances along a cluster chain in the fat and frees all clusters visited. */ |
742 | /* Description: This function trances along a cluster chain in the fat and frees all clusters visited. */ |
743 | /* */ |
743 | /* */ |
744 | /****************************************************************************************************************************************/ |
744 | /****************************************************************************************************************************************/ |
745 | uint8_t DeleteClusterChain(uint16_t StartCluster) |
745 | uint8_t DeleteClusterChain(uint16_t StartCluster) |
746 | { |
746 | { |
747 | uint16_t cluster; |
747 | uint16_t cluster; |
748 | uint32_t fat_byte_offset, sector, byte; |
748 | uint32_t fat_byte_offset, sector, byte; |
749 | Fat16Entry_t * fat; |
749 | Fat16Entry_t * fat; |
750 | uint8_t buffer[BYTES_PER_SECTOR]; |
750 | uint8_t buffer[BYTES_PER_SECTOR]; |
751 | uint32_t sector_in_buffer = 0; |
751 | uint32_t sector_in_buffer = 0; |
752 | uint8_t repeat = 0; |
752 | uint8_t repeat = 0; |
753 | 753 | ||
754 | if(!Partition.IsValid) return 0; |
754 | if(!Partition.IsValid) return 0; |
755 | 755 | ||
756 | cluster = StartCluster; // init chain trace |
756 | cluster = StartCluster; // init chain trace |
757 | // calculate byte offset in the fat for corresponding entry |
757 | // calculate byte offset in the fat for corresponding entry |
758 | fat_byte_offset = ((uint32_t)cluster)<<1; // two FAT bytes (16 bits) for every cluster |
758 | fat_byte_offset = ((uint32_t)cluster)<<1; // two FAT bytes (16 bits) for every cluster |
759 | // calculate the sector that contains the current cluster within the fat |
759 | // calculate the sector that contains the current cluster within the fat |
760 | sector = Partition.FirstFatSector + ( fat_byte_offset / BYTES_PER_SECTOR); |
760 | sector = Partition.FirstFatSector + ( fat_byte_offset / BYTES_PER_SECTOR); |
761 | // calculate byte offset of the current cluster within that fat sector |
761 | // calculate byte offset of the current cluster within that fat sector |
762 | byte = fat_byte_offset % BYTES_PER_SECTOR; |
762 | byte = fat_byte_offset % BYTES_PER_SECTOR; |
763 | do |
763 | do |
764 | { |
764 | { |
765 | if(sector != sector_in_buffer) |
765 | if(sector != sector_in_buffer) |
766 | { |
766 | { |
767 | // read this sector to buffer |
767 | // read this sector to buffer |
768 | sector_in_buffer = sector; |
768 | sector_in_buffer = sector; |
769 | if(SD_SUCCESS != SDC_GetSector(sector_in_buffer, buffer)) return 0; // read sector from sd-card |
769 | if(SD_SUCCESS != SDC_GetSector(sector_in_buffer, buffer)) return 0; // read sector from sd-card |
770 | } |
770 | } |
771 | // read the next cluster from cache |
771 | // read the next cluster from cache |
772 | fat = (Fat16Entry_t *)(&(buffer[byte])); |
772 | fat = (Fat16Entry_t *)(&(buffer[byte])); |
773 | cluster = fat->NextCluster; |
773 | cluster = fat->NextCluster; |
774 | if((FAT16_CLUSTER_USED_MIN <= cluster) && (cluster <= FAT16_CLUSTER_USED_MAX) ) repeat = 1; |
774 | if((FAT16_CLUSTER_USED_MIN <= cluster) && (cluster <= FAT16_CLUSTER_USED_MAX) ) repeat = 1; |
775 | else repeat = 0; |
775 | else repeat = 0; |
776 | 776 | ||
777 | fat->NextCluster = FAT16_CLUSTER_FREE; // mark current cluster as free |
777 | fat->NextCluster = FAT16_CLUSTER_FREE; // mark current cluster as free |
778 | // calculate byte offset in the fat for corresponding entry |
778 | // calculate byte offset in the fat for corresponding entry |
779 | fat_byte_offset = ((uint32_t)cluster)<<1; // two FAT bytes (16 bits) for every cluster |
779 | fat_byte_offset = ((uint32_t)cluster)<<1; // two FAT bytes (16 bits) for every cluster |
780 | // calculate the sector that contains the current cluster within the fat |
780 | // calculate the sector that contains the current cluster within the fat |
781 | sector = Partition.FirstFatSector + ( fat_byte_offset / BYTES_PER_SECTOR); |
781 | sector = Partition.FirstFatSector + ( fat_byte_offset / BYTES_PER_SECTOR); |
782 | // calculate byte offset of the current cluster within that fat sector |
782 | // calculate byte offset of the current cluster within that fat sector |
783 | byte = fat_byte_offset % BYTES_PER_SECTOR; |
783 | byte = fat_byte_offset % BYTES_PER_SECTOR; |
784 | // if new sector is not the sector in buffer or the last cluster in the chain was traced |
784 | // if new sector is not the sector in buffer or the last cluster in the chain was traced |
785 | if((sector != sector_in_buffer) || !repeat) |
785 | if((sector != sector_in_buffer) || !repeat) |
786 | { // write sector in buffer |
786 | { // write sector in buffer |
787 | if(SD_SUCCESS != SDC_PutSector(sector_in_buffer,buffer)) return 0; |
787 | if(SD_SUCCESS != SDC_PutSector(sector_in_buffer,buffer)) return 0; |
788 | } |
788 | } |
789 | } |
789 | } |
790 | while(repeat); |
790 | while(repeat); |
791 | 791 | ||
792 | return 1; |
792 | return 1; |
793 | } |
793 | } |
794 | 794 | ||
795 | 795 | ||
796 | /****************************************************************************************************************************************/ |
796 | /****************************************************************************************************************************************/ |
797 | /* Function: uint16_t AppendCluster(File *file); */ |
797 | /* Function: uint16_t AppendCluster(File *file); */ |
798 | /* */ |
798 | /* */ |
799 | /* Description: This function looks in the fat to find the next free cluster and appends it to the file. */ |
799 | /* Description: This function looks in the fat to find the next free cluster and appends it to the file. */ |
800 | /* */ |
800 | /* */ |
801 | /* Returnvalue: The function returns the appened cluster number or 0 of no cluster was appended. */ |
801 | /* Returnvalue: The function returns the appened cluster number or 0 of no cluster was appended. */ |
802 | /****************************************************************************************************************************************/ |
802 | /****************************************************************************************************************************************/ |
803 | uint16_t AppendCluster(File_t *file) |
803 | uint16_t AppendCluster(File_t *file) |
804 | { |
804 | { |
805 | uint16_t last_cluster, new_cluster = 0; |
805 | uint16_t last_cluster, new_cluster = 0; |
806 | uint32_t fat_byte_offset, sector, byte; |
806 | uint32_t fat_byte_offset, sector, byte; |
807 | Fat16Entry_t * fat; |
807 | Fat16Entry_t * fat; |
808 | 808 | ||
809 | if((!Partition.IsValid) || (file == NULL)) return(new_cluster); |
809 | if((!Partition.IsValid) || (file == NULL)) return(new_cluster); |
810 | 810 | ||
811 | new_cluster = FindNextFreeCluster(file); // the next free cluster found on the disk. |
811 | new_cluster = FindNextFreeCluster(file); // the next free cluster found on the disk. |
812 | if(new_cluster) |
812 | if(new_cluster) |
813 | { // A free cluster was found and can be added to the end of the file. |
813 | { // A free cluster was found and can be added to the end of the file. |
814 | fseek_(file, 0, SEEK_END); // jump to the end of the file |
814 | fseek_(file, 0, SEEK_END); // jump to the end of the file |
815 | last_cluster = SectorToFat16Cluster(file->FirstSectorOfCurrCluster); // determine current file cluster |
815 | last_cluster = SectorToFat16Cluster(file->FirstSectorOfCurrCluster); // determine current file cluster |
816 | fat_byte_offset = ((uint32_t)last_cluster)<<1; |
816 | fat_byte_offset = ((uint32_t)last_cluster)<<1; |
817 | sector = Partition.FirstFatSector + ( fat_byte_offset / BYTES_PER_SECTOR); |
817 | sector = Partition.FirstFatSector + ( fat_byte_offset / BYTES_PER_SECTOR); |
818 | byte = fat_byte_offset % BYTES_PER_SECTOR; |
818 | byte = fat_byte_offset % BYTES_PER_SECTOR; |
819 | 819 | ||
820 | if(file->SectorInCache != sector) |
820 | if(file->SectorInCache != sector) |
821 | { |
821 | { |
822 | file->SectorInCache = sector; // update sector stored in buffer |
822 | file->SectorInCache = sector; // update sector stored in buffer |
823 | if(SD_SUCCESS != SDC_GetSector(file->SectorInCache, file->Cache)) // read sector from sd-card |
823 | if(SD_SUCCESS != SDC_GetSector(file->SectorInCache, file->Cache)) // read sector from sd-card |
824 | { |
824 | { |
825 | Fat16_Deinit(); |
825 | Fat16_Deinit(); |
826 | return(0); |
826 | return(0); |
827 | } |
827 | } |
828 | } |
828 | } |
829 | fat = (Fat16Entry_t *)(&(file->Cache[byte])); |
829 | fat = (Fat16Entry_t *)(&(file->Cache[byte])); |
830 | fat->NextCluster = new_cluster; // append the free cluster to the end of the file in the FAT. |
830 | fat->NextCluster = new_cluster; // append the free cluster to the end of the file in the FAT. |
831 | if(SD_SUCCESS != SDC_PutSector(file->SectorInCache, file->Cache)) // save the modified sector to the FAT. |
831 | if(SD_SUCCESS != SDC_PutSector(file->SectorInCache, file->Cache)) // save the modified sector to the FAT. |
832 | { |
832 | { |
833 | Fat16_Deinit(); |
833 | Fat16_Deinit(); |
834 | return(0); |
834 | return(0); |
835 | } |
835 | } |
836 | file->FirstSectorOfCurrCluster = Fat16ClusterToSector(new_cluster); |
836 | file->FirstSectorOfCurrCluster = Fat16ClusterToSector(new_cluster); |
837 | file->SectorOfCurrCluster = 0; |
837 | file->SectorOfCurrCluster = 0; |
838 | file->ByteOfCurrSector = 0; |
838 | file->ByteOfCurrSector = 0; |
839 | } |
839 | } |
840 | return(new_cluster); |
840 | return(new_cluster); |
841 | } |
841 | } |
842 | 842 | ||
843 | /****************************************************************************************************************************************************/ |
843 | /****************************************************************************************************************************************************/ |
844 | /* Function: DirectoryEntryExist(int8_t *, uint8_t, uint8_t, File_t *) */ |
844 | /* Function: DirectoryEntryExist(int8_t *, uint8_t, uint8_t, File_t *) */ |
845 | /* */ |
845 | /* */ |
846 | /* Description: This function searches all possible dir entries until the file or directory is found or the end of the directory is reached */ |
846 | /* Description: This function searches all possible dir entries until the file or directory is found or the end of the directory is reached */ |
847 | /* */ |
847 | /* */ |
848 | /* Returnvalue: This function returns 1 if the directory entry specified was found. */ |
848 | /* Returnvalue: This function returns 1 if the directory entry specified was found. */ |
849 | /****************************************************************************************************************************************************/ |
849 | /****************************************************************************************************************************************************/ |
850 | uint8_t DirectoryEntryExist(int8_t *dirname, uint8_t attribfilter, uint8_t attribmask, File_t *file) |
850 | uint8_t DirectoryEntryExist(int8_t *dirname, uint8_t attribfilter, uint8_t attribmask, File_t *file) |
851 | { |
851 | { |
852 | uint32_t dir_sector, max_dir_sector, curr_sector; |
852 | uint32_t dir_sector, max_dir_sector, curr_sector; |
853 | uint16_t dir_entry = 0; |
853 | uint16_t dir_entry = 0; |
854 | 854 | ||
855 | uint16_t end_of_directory_not_reached = 0; |
855 | uint16_t end_of_directory_not_reached = 0; |
856 | uint8_t i = 0; |
856 | uint8_t i = 0; |
857 | uint8_t direntry_exist = 0; |
857 | uint8_t direntry_exist = 0; |
858 | DirEntry_t * dir; |
858 | DirEntry_t * dir; |
859 | 859 | ||
860 | // if incomming pointers are useless return immediatly |
860 | // if incomming pointers are useless return immediatly |
861 | if((!Partition.IsValid) || (file == NULL) || (dirname == NULL)) return(direntry_exist); |
861 | if((!Partition.IsValid) || (file == NULL) || (dirname == NULL)) return(direntry_exist); |
862 | 862 | ||
863 | // dir entries can be searched only in filesclusters that have |
863 | // dir entries can be searched only in filesclusters that have |
864 | // a corresponding dir entry with adir-flag set in its attribute |
864 | // a corresponding dir entry with adir-flag set in its attribute |
865 | // or direct within the root directory area |
865 | // or direct within the root directory area |
866 | 866 | ||
867 | file->FirstSectorOfFirstCluster = 0; |
867 | file->FirstSectorOfFirstCluster = 0; |
868 | // no current directory exist therefore assume searching in the root |
868 | // no current directory exist therefore assume searching in the root |
869 | if(file->DirectorySector == 0) |
869 | if(file->DirectorySector == 0) |
870 | { |
870 | { |
871 | max_dir_sector = (Partition.MaxRootEntries * DIRENTRY_SIZE)/BYTES_PER_SECTOR; |
871 | max_dir_sector = (Partition.MaxRootEntries * DIRENTRY_SIZE)/BYTES_PER_SECTOR; |
872 | file->FirstSectorOfFirstCluster = Partition.FirstRootDirSector; |
872 | file->FirstSectorOfFirstCluster = Partition.FirstRootDirSector; |
873 | } |
873 | } |
874 | // within the root directory area we can read sectors sequentially until the end of this area |
874 | // within the root directory area we can read sectors sequentially until the end of this area |
875 | else if((Partition.FirstRootDirSector <= file->DirectorySector) && (file->DirectorySector < Partition.FirstDataSector)) |
875 | else if((Partition.FirstRootDirSector <= file->DirectorySector) && (file->DirectorySector < Partition.FirstDataSector)) |
876 | { |
876 | { |
877 | max_dir_sector = (Partition.MaxRootEntries * DIRENTRY_SIZE)/BYTES_PER_SECTOR; |
877 | max_dir_sector = (Partition.MaxRootEntries * DIRENTRY_SIZE)/BYTES_PER_SECTOR; |
878 | } |
878 | } |
879 | // within the data clusters we can read sectors sequentially only within the cluster |
879 | // within the data clusters we can read sectors sequentially only within the cluster |
880 | else if((Partition.FirstDataSector <= file->DirectorySector) && (file->DirectorySector <= Partition.LastDataSector)) |
880 | else if((Partition.FirstDataSector <= file->DirectorySector) && (file->DirectorySector <= Partition.LastDataSector)) |
881 | { |
881 | { |
882 | max_dir_sector = Partition.SectorsPerCluster; // limit max secters before next cluster |
882 | max_dir_sector = Partition.SectorsPerCluster; // limit max secters before next cluster |
883 | } |
883 | } |
884 | else return (direntry_exist); // bad sector range for directory sector of the file |
884 | else return (direntry_exist); // bad sector range for directory sector of the file |
885 | // if search area is not defined yet |
885 | // if search area is not defined yet |
886 | if(file->FirstSectorOfFirstCluster == 0) |
886 | if(file->FirstSectorOfFirstCluster == 0) |
887 | { |
887 | { |
888 | // check if the directory entry of current file is existent and has the dir-flag set |
888 | // check if the directory entry of current file is existent and has the dir-flag set |
889 | file->SectorInCache = file->DirectorySector; // update the sector number of file cache. |
889 | file->SectorInCache = file->DirectorySector; // update the sector number of file cache. |
890 | if(SD_SUCCESS != SDC_GetSector(file->SectorInCache, file->Cache))// read in the sector. |
890 | if(SD_SUCCESS != SDC_GetSector(file->SectorInCache, file->Cache))// read in the sector. |
891 | { |
891 | { |
892 | Fat16_Deinit(); |
892 | Fat16_Deinit(); |
893 | return(direntry_exist); |
893 | return(direntry_exist); |
894 | } |
894 | } |
895 | dir = (DirEntry_t *)file->Cache; // set pointer to directory |
895 | dir = (DirEntry_t *)file->Cache; // set pointer to directory |
896 | switch((uint8_t)dir[file->DirectoryIndex].Name[0]) // check if current directory exist |
896 | switch((uint8_t)dir[file->DirectoryIndex].Name[0]) // check if current directory exist |
897 | { |
897 | { |
898 | case SLOT_EMPTY: |
898 | case SLOT_EMPTY: |
899 | case SLOT_DELETED: |
899 | case SLOT_DELETED: |
900 | // the directrory pointer of this file points to a deleted or not existen directory |
900 | // the directrory pointer of this file points to a deleted or not existen directory |
901 | // therefore no file or subdirectory can be created |
901 | // therefore no file or subdirectory can be created |
902 | return (direntry_exist); |
902 | return (direntry_exist); |
903 | break; |
903 | break; |
904 | default: // and is a real directory |
904 | default: // and is a real directory |
905 | if((dir[file->DirectoryIndex].Attribute & ATTR_SUBDIRECTORY) != ATTR_SUBDIRECTORY) |
905 | if((dir[file->DirectoryIndex].Attribute & ATTR_SUBDIRECTORY) != ATTR_SUBDIRECTORY) |
906 | { // current file is not a directory therefore no file or subdirectory can be created here |
906 | { // current file is not a directory therefore no file or subdirectory can be created here |
907 | return (direntry_exist); |
907 | return (direntry_exist); |
908 | } |
908 | } |
909 | break; |
909 | break; |
910 | } |
910 | } |
911 | file->FirstSectorOfFirstCluster = Fat16ClusterToSector(dir[file->DirectoryIndex].StartCluster); |
911 | file->FirstSectorOfFirstCluster = Fat16ClusterToSector(dir[file->DirectoryIndex].StartCluster); |
912 | } |
912 | } |
913 | 913 | ||
914 | // update current file data area position to start of first cluster |
914 | // update current file data area position to start of first cluster |
915 | file->FirstSectorOfCurrCluster = file->FirstSectorOfFirstCluster; |
915 | file->FirstSectorOfCurrCluster = file->FirstSectorOfFirstCluster; |
916 | file->SectorOfCurrCluster = 0; |
916 | file->SectorOfCurrCluster = 0; |
917 | file->ByteOfCurrSector = 0; |
917 | file->ByteOfCurrSector = 0; |
918 | 918 | ||
919 | do // loop over all data clusters of the current directory entry |
919 | do // loop over all data clusters of the current directory entry |
920 | { |
920 | { |
921 | dir_sector = 0; // reset sector counter within a new cluster |
921 | dir_sector = 0; // reset sector counter within a new cluster |
922 | do // loop over all sectors of a cluster or all sectors of the root directory |
922 | do // loop over all sectors of a cluster or all sectors of the root directory |
923 | { |
923 | { |
924 | curr_sector = file->FirstSectorOfCurrCluster + dir_sector; // calculate sector number |
924 | curr_sector = file->FirstSectorOfCurrCluster + dir_sector; // calculate sector number |
925 | file->SectorInCache = curr_sector; // upate the sector number of file cache. |
925 | file->SectorInCache = curr_sector; // upate the sector number of file cache. |
926 | if(SD_SUCCESS != SDC_GetSector(file->SectorInCache, file->Cache))// read the sector |
926 | if(SD_SUCCESS != SDC_GetSector(file->SectorInCache, file->Cache))// read the sector |
927 | { |
927 | { |
928 | Fat16_Deinit(); |
928 | Fat16_Deinit(); |
929 | return(direntry_exist); |
929 | return(direntry_exist); |
930 | } |
930 | } |
931 | dir = (DirEntry_t *)file->Cache; // set pointer to directory |
931 | dir = (DirEntry_t *)file->Cache; // set pointer to directory |
932 | // search all directory entries within that sector |
932 | // search all directory entries within that sector |
933 | for(dir_entry = 0; dir_entry < DIRENTRIES_PER_SECTOR; dir_entry++) |
933 | for(dir_entry = 0; dir_entry < DIRENTRIES_PER_SECTOR; dir_entry++) |
934 | { // check for existing dir entry |
934 | { // check for existing dir entry |
935 | switch((uint8_t)dir[dir_entry].Name[0]) |
935 | switch((uint8_t)dir[dir_entry].Name[0]) |
936 | { |
936 | { |
937 | case SLOT_EMPTY: |
937 | case SLOT_EMPTY: |
938 | case SLOT_DELETED: |
938 | case SLOT_DELETED: |
939 | // ignore empty or deleted dir entries |
939 | // ignore empty or deleted dir entries |
940 | break; |
940 | break; |
941 | default: |
941 | default: |
942 | // if existing check attributes before names are compared will safe performance |
942 | // if existing check attributes before names are compared will safe performance |
943 | if ((dir[dir_entry].Attribute & attribmask) != attribfilter) break; // attribute must match |
943 | if ((dir[dir_entry].Attribute & attribmask) != attribfilter) break; // attribute must match |
944 | // then compare the name to the giveb dirname (first 11 characters include 8 chars of basename and 3 chars extension.) |
944 | // then compare the name to the giveb dirname (first 11 characters include 8 chars of basename and 3 chars extension.) |
945 | i = 0; |
945 | i = 0; |
946 | while((i < 11) && (dir[dir_entry].Name[i] == dirname[i])) i++; |
946 | while((i < 11) && (dir[dir_entry].Name[i] == dirname[i])) i++; |
947 | if (i < 10) break; // names does not match |
947 | if (i < 10) break; // names does not match |
948 | // if dirname and attribute have matched |
948 | // if dirname and attribute have matched |
949 | file->Attribute = dir[dir_entry].Attribute; // store attribute of found dir entry |
949 | file->Attribute = dir[dir_entry].Attribute; // store attribute of found dir entry |
950 | file->FirstSectorOfFirstCluster = Fat16ClusterToSector(dir[dir_entry].StartCluster); // set sector of first data cluster |
950 | file->FirstSectorOfFirstCluster = Fat16ClusterToSector(dir[dir_entry].StartCluster); // set sector of first data cluster |
951 | file->FirstSectorOfCurrCluster = file->FirstSectorOfFirstCluster; |
951 | file->FirstSectorOfCurrCluster = file->FirstSectorOfFirstCluster; |
952 | file->SectorOfCurrCluster = 0; |
952 | file->SectorOfCurrCluster = 0; |
953 | file->ByteOfCurrSector = 0; |
953 | file->ByteOfCurrSector = 0; |
954 | file->DirectorySector = curr_sector; // current sector |
954 | file->DirectorySector = curr_sector; // current sector |
955 | file->DirectoryIndex = dir_entry; // current direntry in current sector |
955 | file->DirectoryIndex = dir_entry; // current direntry in current sector |
956 | file->Size = dir[dir_entry].Size; |
956 | file->Size = dir[dir_entry].Size; |
957 | direntry_exist = 1; // mark as found |
957 | direntry_exist = 1; // mark as found |
958 | dir_entry = DIRENTRIES_PER_SECTOR; // stop for-loop |
958 | dir_entry = DIRENTRIES_PER_SECTOR; // stop for-loop |
959 | } // end of first byte of name check |
959 | } // end of first byte of name check |
960 | } |
960 | } |
961 | dir_sector++; // search next sector |
961 | dir_sector++; // search next sector |
962 | // stop if we reached the end of the cluster or the end of the root dir |
962 | // stop if we reached the end of the cluster or the end of the root dir |
963 | }while((dir_sector < max_dir_sector) && (!direntry_exist)); |
963 | }while((dir_sector < max_dir_sector) && (!direntry_exist)); |
964 | 964 | ||
965 | // if we are seaching in the data area and the file not found in this cluster so take next cluster. |
965 | // if we are seaching in the data area and the file not found in this cluster so take next cluster. |
966 | if(!direntry_exist && ( Partition.FirstDataSector <= file->FirstSectorOfCurrCluster)) |
966 | if(!direntry_exist && ( Partition.FirstDataSector <= file->FirstSectorOfCurrCluster)) |
967 | { |
967 | { |
968 | end_of_directory_not_reached = GetNextCluster(file); // updates File->FirstSectorOfCurrCluster |
968 | end_of_directory_not_reached = GetNextCluster(file); // updates File->FirstSectorOfCurrCluster |
969 | } |
969 | } |
970 | }while((end_of_directory_not_reached) && (!direntry_exist)); // repeat until a next cluster exist an no |
970 | }while((end_of_directory_not_reached) && (!direntry_exist)); // repeat until a next cluster exist an no |
971 | return(direntry_exist); |
971 | return(direntry_exist); |
972 | } |
972 | } |
973 | 973 | ||
974 | 974 | ||
975 | /****************************************************************************************************************************************/ |
975 | /****************************************************************************************************************************************/ |
976 | /* Function: CreateDirectoryEntry(int8_t *, uint16_t, File_t *) */ |
976 | /* Function: CreateDirectoryEntry(int8_t *, uint16_t, File_t *) */ |
977 | /* */ |
977 | /* */ |
978 | /* Description: This function looks for the next free position in the directory and creates an entry. */ |
978 | /* Description: This function looks for the next free position in the directory and creates an entry. */ |
979 | /* The type of an directory entry is specified by the file attribute. */ |
979 | /* The type of an directory entry is specified by the file attribute. */ |
980 | /* */ |
980 | /* */ |
981 | /* Returnvalue: Return 0 on error */ |
981 | /* Returnvalue: Return 0 on error */ |
982 | /****************************************************************************************************************************************/ |
982 | /****************************************************************************************************************************************/ |
983 | uint8_t CreateDirectoryEntry(int8_t *dirname, uint8_t attrib, File_t *file) |
983 | uint8_t CreateDirectoryEntry(int8_t *dirname, uint8_t attrib, File_t *file) |
984 | { |
984 | { |
985 | uint32_t dir_sector, max_dir_sector, curr_sector; |
985 | uint32_t dir_sector, max_dir_sector, curr_sector; |
986 | uint16_t dir_entry = 0; |
986 | uint16_t dir_entry = 0; |
987 | uint16_t subdircluster, dircluster = 0; |
987 | uint16_t subdircluster, dircluster = 0; |
988 | uint16_t end_of_directory_not_reached = 0; |
988 | uint16_t end_of_directory_not_reached = 0; |
989 | uint8_t i = 0; |
989 | uint8_t i = 0; |
990 | uint8_t retvalue = 0; |
990 | uint8_t retvalue = 0; |
991 | DirEntry_t* dir; |
991 | DirEntry_t* dir; |
992 | 992 | ||
993 | if((!Partition.IsValid) || (file == NULL) || (dirname == NULL)) return (retvalue); |
993 | if((!Partition.IsValid) || (file == NULL) || (dirname == NULL)) return (retvalue); |
994 | // It is not checked here that the dir entry that should be created is already existent! |
994 | // It is not checked here that the dir entry that should be created is already existent! |
995 | 995 | ||
996 | // Dir entries can be created only in file-clusters that have |
996 | // Dir entries can be created only in file-clusters that have |
997 | // the dir-flag set in its attribute or within the root directory |
997 | // the dir-flag set in its attribute or within the root directory |
998 | 998 | ||
999 | file->FirstSectorOfFirstCluster = 0; |
999 | file->FirstSectorOfFirstCluster = 0; |
1000 | // no current directory exist therefore assume creating in the root |
1000 | // no current directory exist therefore assume creating in the root |
1001 | if(file->DirectorySector == 0) |
1001 | if(file->DirectorySector == 0) |
1002 | { |
1002 | { |
1003 | max_dir_sector = (Partition.MaxRootEntries * DIRENTRY_SIZE)/BYTES_PER_SECTOR; |
1003 | max_dir_sector = (Partition.MaxRootEntries * DIRENTRY_SIZE)/BYTES_PER_SECTOR; |
1004 | dircluster = 0; |
1004 | dircluster = 0; |
1005 | file->FirstSectorOfFirstCluster = Partition.FirstRootDirSector; |
1005 | file->FirstSectorOfFirstCluster = Partition.FirstRootDirSector; |
1006 | } |
1006 | } |
1007 | // within the root directory area we can read sectors sequentially until the end of this area |
1007 | // within the root directory area we can read sectors sequentially until the end of this area |
1008 | else if((Partition.FirstRootDirSector <= file->DirectorySector) && (file->DirectorySector < Partition.FirstDataSector)) |
1008 | else if((Partition.FirstRootDirSector <= file->DirectorySector) && (file->DirectorySector < Partition.FirstDataSector)) |
1009 | { |
1009 | { |
1010 | max_dir_sector = (Partition.MaxRootEntries * DIRENTRY_SIZE)/BYTES_PER_SECTOR; |
1010 | max_dir_sector = (Partition.MaxRootEntries * DIRENTRY_SIZE)/BYTES_PER_SECTOR; |
1011 | } |
1011 | } |
1012 | // within the data clusters we can read sectors sequentially only within the cluster |
1012 | // within the data clusters we can read sectors sequentially only within the cluster |
1013 | else if((Partition.FirstDataSector <= file->DirectorySector) && (file->DirectorySector <= Partition.LastDataSector)) |
1013 | else if((Partition.FirstDataSector <= file->DirectorySector) && (file->DirectorySector <= Partition.LastDataSector)) |
1014 | { |
1014 | { |
1015 | max_dir_sector = Partition.SectorsPerCluster; |
1015 | max_dir_sector = Partition.SectorsPerCluster; |
1016 | } |
1016 | } |
1017 | else return (retvalue); // bad sector range for directory sector of the file |
1017 | else return (retvalue); // bad sector range for directory sector of the file |
1018 | // if search area is not defined yet |
1018 | // if search area is not defined yet |
1019 | if(file->FirstSectorOfFirstCluster == 0) |
1019 | if(file->FirstSectorOfFirstCluster == 0) |
1020 | { |
1020 | { |
1021 | // check if the directory entry of current file is existent and has the dir-flag set |
1021 | // check if the directory entry of current file is existent and has the dir-flag set |
1022 | file->SectorInCache = file->DirectorySector; // update the sector number of file cache. |
1022 | file->SectorInCache = file->DirectorySector; // update the sector number of file cache. |
1023 | if(SD_SUCCESS != SDC_GetSector(file->SectorInCache, file->Cache))// read in the sector. |
1023 | if(SD_SUCCESS != SDC_GetSector(file->SectorInCache, file->Cache))// read in the sector. |
1024 | { |
1024 | { |
1025 | Fat16_Deinit(); |
1025 | Fat16_Deinit(); |
1026 | return(retvalue); |
1026 | return(retvalue); |
1027 | } |
1027 | } |
1028 | dir = (DirEntry_t *)file->Cache; // set pointer to directory |
1028 | dir = (DirEntry_t *)file->Cache; // set pointer to directory |
1029 | switch((uint8_t)dir[file->DirectoryIndex].Name[0]) // check if current directory exist |
1029 | switch((uint8_t)dir[file->DirectoryIndex].Name[0]) // check if current directory exist |
1030 | { |
1030 | { |
1031 | case SLOT_EMPTY: |
1031 | case SLOT_EMPTY: |
1032 | case SLOT_DELETED: |
1032 | case SLOT_DELETED: |
1033 | return (retvalue); |
1033 | return (retvalue); |
1034 | break; |
1034 | break; |
1035 | default: // and is a real directory |
1035 | default: // and is a real directory |
1036 | if((dir[file->DirectoryIndex].Attribute & ATTR_SUBDIRECTORY) != ATTR_SUBDIRECTORY) |
1036 | if((dir[file->DirectoryIndex].Attribute & ATTR_SUBDIRECTORY) != ATTR_SUBDIRECTORY) |
1037 | { // current file is not a directory therefore no file or subdirectory can be created here |
1037 | { // current file is not a directory therefore no file or subdirectory can be created here |
1038 | return (retvalue); |
1038 | return (retvalue); |
1039 | } |
1039 | } |
1040 | break; |
1040 | break; |
1041 | } |
1041 | } |
1042 | dircluster = dir[file->DirectoryIndex].StartCluster; |
1042 | dircluster = dir[file->DirectoryIndex].StartCluster; |
1043 | file->FirstSectorOfFirstCluster = Fat16ClusterToSector(dircluster); |
1043 | file->FirstSectorOfFirstCluster = Fat16ClusterToSector(dircluster); |
1044 | } |
1044 | } |
1045 | 1045 | ||
1046 | subdircluster = FindNextFreeCluster(file); // get the next free cluster on the disk and mark it as used. |
1046 | subdircluster = FindNextFreeCluster(file); // get the next free cluster on the disk and mark it as used. |
1047 | if(subdircluster) |
1047 | if(subdircluster) |
1048 | { |
1048 | { |
1049 | file->FirstSectorOfCurrCluster = file->FirstSectorOfFirstCluster; |
1049 | file->FirstSectorOfCurrCluster = file->FirstSectorOfFirstCluster; |
1050 | file->SectorOfCurrCluster = 0; |
1050 | file->SectorOfCurrCluster = 0; |
1051 | do // loop over all clusters of current directory |
1051 | do // loop over all clusters of current directory |
1052 | { |
1052 | { |
1053 | dir_sector = 0; // reset sector counter within a new cluster |
1053 | dir_sector = 0; // reset sector counter within a new cluster |
1054 | do // loop over all sectors of a cluster or all sectors of the root directory |
1054 | do // loop over all sectors of a cluster or all sectors of the root directory |
1055 | { |
1055 | { |
1056 | curr_sector = file->FirstSectorOfCurrCluster + dir_sector; // calculate sector number |
1056 | curr_sector = file->FirstSectorOfCurrCluster + dir_sector; // calculate sector number |
1057 | file->SectorInCache = curr_sector; // upate the sector number of file cache. |
1057 | file->SectorInCache = curr_sector; // upate the sector number of file cache. |
1058 | if(SD_SUCCESS != SDC_GetSector(file->SectorInCache, file->Cache))// read in the sector. |
1058 | if(SD_SUCCESS != SDC_GetSector(file->SectorInCache, file->Cache))// read in the sector. |
1059 | { |
1059 | { |
1060 | Fat16_Deinit(); |
1060 | Fat16_Deinit(); |
1061 | return(retvalue); |
1061 | return(retvalue); |
1062 | } |
1062 | } |
1063 | dir = (DirEntry_t *)file->Cache; // set pointer to directory |
1063 | dir = (DirEntry_t *)file->Cache; // set pointer to directory |
1064 | // search all directory entries of a sector |
1064 | // search all directory entries of a sector |
1065 | for(dir_entry = 0; dir_entry < DIRENTRIES_PER_SECTOR; dir_entry++) |
1065 | for(dir_entry = 0; dir_entry < DIRENTRIES_PER_SECTOR; dir_entry++) |
1066 | { // check if current direntry is available |
1066 | { // check if current direntry is available |
1067 | if(((uint8_t)dir[dir_entry].Name[0] == SLOT_EMPTY) || ((uint8_t)dir[dir_entry].Name[0] == SLOT_DELETED)) |
1067 | if(((uint8_t)dir[dir_entry].Name[0] == SLOT_EMPTY) || ((uint8_t)dir[dir_entry].Name[0] == SLOT_DELETED)) |
1068 | { // a free direntry was found |
1068 | { // a free direntry was found |
1069 | for(i = 0; i < 11; i++) dir[dir_entry].Name[i] = dirname[i]; // Set dir name |
1069 | for(i = 0; i < 11; i++) dir[dir_entry].Name[i] = dirname[i]; // Set dir name |
1070 | dir[dir_entry].Attribute = attrib; // Set the attribute of the new directoryentry. |
1070 | dir[dir_entry].Attribute = attrib; // Set the attribute of the new directoryentry. |
1071 | dir[dir_entry].StartCluster = subdircluster; // copy the location of the first datacluster to the directoryentry. |
1071 | dir[dir_entry].StartCluster = subdircluster; // copy the location of the first datacluster to the directoryentry. |
1072 | dir[dir_entry].DateTime = FileDateTime(&SystemTime); // set date/time |
1072 | dir[dir_entry].DateTime = FileDateTime(&SystemTime); // set date/time |
1073 | dir[dir_entry].Size = 0; // the new createted file has no content yet. |
1073 | dir[dir_entry].Size = 0; // the new createted file has no content yet. |
1074 | if(SD_SUCCESS != SDC_PutSector(file->SectorInCache, file->Cache)) // write back to card |
1074 | if(SD_SUCCESS != SDC_PutSector(file->SectorInCache, file->Cache)) // write back to card |
1075 | { |
1075 | { |
1076 | Fat16_Deinit(); |
1076 | Fat16_Deinit(); |
1077 | return(retvalue); |
1077 | return(retvalue); |
1078 | } |
1078 | } |
1079 | file->FirstSectorOfFirstCluster = Fat16ClusterToSector(subdircluster); // Calculate absolute sectorposition of first datacluster. |
1079 | file->FirstSectorOfFirstCluster = Fat16ClusterToSector(subdircluster); // Calculate absolute sectorposition of first datacluster. |
1080 | file->FirstSectorOfCurrCluster = file->FirstSectorOfFirstCluster; // Start reading the file with the first sector of the first datacluster. |
1080 | file->FirstSectorOfCurrCluster = file->FirstSectorOfFirstCluster; // Start reading the file with the first sector of the first datacluster. |
1081 | file->SectorOfCurrCluster = 0; // reset sector of cureen cluster |
1081 | file->SectorOfCurrCluster = 0; // reset sector of cureen cluster |
1082 | file->ByteOfCurrSector = 0; // reset the byte location within the current sector |
1082 | file->ByteOfCurrSector = 0; // reset the byte location within the current sector |
1083 | file->Attribute = attrib; // set file attribute to dir attribute |
1083 | file->Attribute = attrib; // set file attribute to dir attribute |
1084 | file->Size = 0; // new file has no size |
1084 | file->Size = 0; // new file has no size |
1085 | file->DirectorySector = curr_sector; |
1085 | file->DirectorySector = curr_sector; |
1086 | file->DirectoryIndex = dir_entry; |
1086 | file->DirectoryIndex = dir_entry; |
1087 | if((attrib & ATTR_SUBDIRECTORY) == ATTR_SUBDIRECTORY) // if a new directory was created then initilize the data area |
1087 | if((attrib & ATTR_SUBDIRECTORY) == ATTR_SUBDIRECTORY) // if a new directory was created then initilize the data area |
1088 | { |
1088 | { |
1089 | ClearCurrCluster(file); // fill cluster with zeros |
1089 | ClearCurrCluster(file); // fill cluster with zeros |
1090 | file->SectorInCache = file->FirstSectorOfFirstCluster; |
1090 | file->SectorInCache = file->FirstSectorOfFirstCluster; |
1091 | if(SD_SUCCESS != SDC_GetSector(file->SectorInCache, file->Cache))// read in the sector. |
1091 | if(SD_SUCCESS != SDC_GetSector(file->SectorInCache, file->Cache))// read in the sector. |
1092 | { |
1092 | { |
1093 | Fat16_Deinit(); |
1093 | Fat16_Deinit(); |
1094 | return(retvalue); |
1094 | return(retvalue); |
1095 | } |
1095 | } |
1096 | dir = (DirEntry_t *)file->Cache; |
1096 | dir = (DirEntry_t *)file->Cache; |
1097 | // create direntry "." to current dir |
1097 | // create direntry "." to current dir |
1098 | dir[0].Name[0] = 0x2E; |
1098 | dir[0].Name[0] = 0x2E; |
1099 | for(i = 1; i < 11; i++) dir[0].Name[i] = ' '; |
1099 | for(i = 1; i < 11; i++) dir[0].Name[i] = ' '; |
1100 | dir[0].Attribute = ATTR_SUBDIRECTORY; |
1100 | dir[0].Attribute = ATTR_SUBDIRECTORY; |
1101 | dir[0].StartCluster = subdircluster; |
1101 | dir[0].StartCluster = subdircluster; |
1102 | dir[0].DateTime = 0; |
1102 | dir[0].DateTime = 0; |
1103 | dir[0].Size = 0; |
1103 | dir[0].Size = 0; |
1104 | // create direntry ".." to the upper dir |
1104 | // create direntry ".." to the upper dir |
1105 | dir[1].Name[0] = 0x2E; |
1105 | dir[1].Name[0] = 0x2E; |
1106 | dir[1].Name[1] = 0x2E; |
1106 | dir[1].Name[1] = 0x2E; |
1107 | for(i = 2; i < 11; i++) dir[1].Name[i] = ' '; |
1107 | for(i = 2; i < 11; i++) dir[1].Name[i] = ' '; |
1108 | dir[1].Attribute = ATTR_SUBDIRECTORY; |
1108 | dir[1].Attribute = ATTR_SUBDIRECTORY; |
1109 | dir[1].StartCluster = dircluster; |
1109 | dir[1].StartCluster = dircluster; |
1110 | dir[1].DateTime = 0; |
1110 | dir[1].DateTime = 0; |
1111 | dir[1].Size = 0; |
1111 | dir[1].Size = 0; |
1112 | if(SD_SUCCESS != SDC_PutSector(file->SectorInCache, file->Cache))// read in the sector. |
1112 | if(SD_SUCCESS != SDC_PutSector(file->SectorInCache, file->Cache))// read in the sector. |
1113 | { |
1113 | { |
1114 | Fat16_Deinit(); |
1114 | Fat16_Deinit(); |
1115 | return(retvalue); |
1115 | return(retvalue); |
1116 | } |
1116 | } |
1117 | } |
1117 | } |
1118 | retvalue = 1; |
1118 | retvalue = 1; |
1119 | dir_entry = DIRENTRIES_PER_SECTOR; // stop for-loop |
1119 | dir_entry = DIRENTRIES_PER_SECTOR; // stop for-loop |
1120 | } |
1120 | } |
1121 | } |
1121 | } |
1122 | dir_sector++; // search next sector |
1122 | dir_sector++; // search next sector |
1123 | // stop if we reached the end of the cluster or the end of the root dir |
1123 | // stop if we reached the end of the cluster or the end of the root dir |
1124 | }while((dir_sector < max_dir_sector) && (!retvalue)); |
1124 | }while((dir_sector < max_dir_sector) && (!retvalue)); |
1125 | 1125 | ||
1126 | // if we are seaching in the data area and the file not found in this cluster so take next cluster. |
1126 | // if we are seaching in the data area and the file not found in this cluster so take next cluster. |
1127 | if(!retvalue && ( Partition.FirstDataSector <= file->FirstSectorOfCurrCluster)) |
1127 | if(!retvalue && ( Partition.FirstDataSector <= file->FirstSectorOfCurrCluster)) |
1128 | { |
1128 | { |
1129 | end_of_directory_not_reached = GetNextCluster(file); // updates File->FirstSectorOfCurrCluster |
1129 | end_of_directory_not_reached = GetNextCluster(file); // updates File->FirstSectorOfCurrCluster |
1130 | } |
1130 | } |
1131 | }while((end_of_directory_not_reached) && (!retvalue)); |
1131 | }while((end_of_directory_not_reached) && (!retvalue)); |
1132 | // Perhaps we are at the end of the last cluster of a directory file an have no free direntry found. |
1132 | // Perhaps we are at the end of the last cluster of a directory file an have no free direntry found. |
1133 | // Then we would need to add a cluster to that file and create the new direntry there. |
1133 | // Then we would need to add a cluster to that file and create the new direntry there. |
1134 | // This code is not implemented yet, because its occurs only if more that 32*32=1024 direntries are |
1134 | // This code is not implemented yet, because its occurs only if more that 32*32=1024 direntries are |
1135 | // within a subdirectory of root. |
1135 | // within a subdirectory of root. |
1136 | } |
1136 | } |
1137 | return(retvalue); // return 1 if file has been created otherwise return 0. |
1137 | return(retvalue); // return 1 if file has been created otherwise return 0. |
1138 | } |
1138 | } |
1139 | 1139 | ||
1140 | /********************************************************************************************************************************************/ |
1140 | /********************************************************************************************************************************************/ |
1141 | /* Function: FileExist(const int8_t* filename, uint8_t attribfilter, uint8_t attribmask, File_t *file); */ |
1141 | /* Function: FileExist(const int8_t* filename, uint8_t attribfilter, uint8_t attribmask, File_t *file); */ |
1142 | /* */ |
1142 | /* */ |
1143 | /* Description: This function looks for the specified file including its subdirectories beginning */ |
1143 | /* Description: This function looks for the specified file including its subdirectories beginning */ |
1144 | /* in the rootdirectory of the drive. If the file is found the Filepointer properties are */ |
1144 | /* in the rootdirectory of the drive. If the file is found the Filepointer properties are */ |
1145 | /* updated. */ |
1145 | /* updated. */ |
1146 | /* */ |
1146 | /* */ |
1147 | /* Returnvalue: 1 if file is found else 0. */ |
1147 | /* Returnvalue: 1 if file is found else 0. */ |
1148 | /********************************************************************************************************************************************/ |
1148 | /********************************************************************************************************************************************/ |
1149 | uint8_t FileExist(const int8_t* filename, const uint8_t attribfilter, const uint8_t attribmask, File_t *file) |
1149 | uint8_t FileExist(const int8_t* filename, const uint8_t attribfilter, const uint8_t attribmask, File_t *file) |
1150 | { |
1150 | { |
1151 | int8_t* path = 0; |
1151 | int8_t* path = 0; |
1152 | int8_t* subpath = 0; |
1152 | int8_t* subpath = 0; |
1153 | uint8_t af, am, file_exist = 0; |
1153 | uint8_t af, am, file_exist = 0; |
1154 | int8_t dirname[12]; // 8+3 + temination character |
1154 | int8_t dirname[12]; // 8+3 + temination character |
1155 | 1155 | ||
1156 | // if incomming pointers are useless return immediatly |
1156 | // if incomming pointers are useless return immediatly |
1157 | if ((filename == NULL) || (file == NULL) || (!Partition.IsValid)) return 0; |
1157 | if ((filename == NULL) || (file == NULL) || (!Partition.IsValid)) return 0; |
1158 | 1158 | ||
1159 | // trace along the filepath |
1159 | // trace along the filepath |
1160 | path = (int8_t*)filename; // start a the beginning of the filename string |
1160 | path = (int8_t*)filename; // start a the beginning of the filename string |
1161 | file->DirectorySector = 0; // start at RootDirectory with file search |
1161 | file->DirectorySector = 0; // start at RootDirectory with file search |
1162 | file->DirectoryIndex = 0; |
1162 | file->DirectoryIndex = 0; |
1163 | // as long as the file was not found and the remaining path is not empty |
1163 | // as long as the file was not found and the remaining path is not empty |
1164 | while((*path != 0) && !file_exist) |
1164 | while((*path != 0) && !file_exist) |
1165 | { // separate dirname and subpath from filepath string |
1165 | { // separate dirname and subpath from filepath string |
1166 | subpath = SeperateDirName(path, dirname); |
1166 | subpath = SeperateDirName(path, dirname); |
1167 | if(subpath != NULL) |
1167 | if(subpath != NULL) |
1168 | { |
1168 | { |
1169 | if(*subpath == 0) |
1169 | if(*subpath == 0) |
1170 | { // empty subpath indicates last element of dir chain |
1170 | { // empty subpath indicates last element of dir chain |
1171 | af = attribfilter; |
1171 | af = attribfilter; |
1172 | am = attribmask; |
1172 | am = attribmask; |
1173 | } |
1173 | } |
1174 | else // it must be a subdirectory and no volume label |
1174 | else // it must be a subdirectory and no volume label |
1175 | { |
1175 | { |
1176 | af = ATTR_SUBDIRECTORY; |
1176 | af = ATTR_SUBDIRECTORY; |
1177 | am = ATTR_SUBDIRECTORY|ATTR_VOLUMELABEL; |
1177 | am = ATTR_SUBDIRECTORY|ATTR_VOLUMELABEL; |
1178 | } |
1178 | } |
1179 | if(!DirectoryEntryExist(dirname, af, am, file)) |
1179 | if(!DirectoryEntryExist(dirname, af, am, file)) |
1180 | { |
1180 | { |
1181 | return (file_exist); // subdirectory does not exist |
1181 | return (file_exist); // subdirectory does not exist |
1182 | } |
1182 | } |
1183 | else |
1183 | else |
1184 | { |
1184 | { |
1185 | if (*subpath == 0) |
1185 | if (*subpath == 0) |
1186 | { |
1186 | { |
1187 | file_exist = 1; // last element of path chain was found with the given attribute filter |
1187 | file_exist = 1; // last element of path chain was found with the given attribute filter |
1188 | } |
1188 | } |
1189 | } |
1189 | } |
1190 | } |
1190 | } |
1191 | else // error seperating the subpath |
1191 | else // error seperating the subpath |
1192 | { |
1192 | { |
1193 | return file_exist; // bad subdir format |
1193 | return file_exist; // bad subdir format |
1194 | } |
1194 | } |
1195 | path = subpath; |
1195 | path = subpath; |
1196 | subpath = 0; |
1196 | subpath = 0; |
1197 | } |
1197 | } |
1198 | return (file_exist); |
1198 | return (file_exist); |
1199 | } |
1199 | } |
1200 | 1200 | ||
1201 | 1201 | ||
1202 | /********************************************************************************************************************************************/ |
1202 | /********************************************************************************************************************************************/ |
1203 | /* Function: FileCreate(const s8* filename, u8 attrib, File_t *file); */ |
1203 | /* Function: FileCreate(const s8* filename, u8 attrib, File_t *file); */ |
1204 | /* */ |
1204 | /* */ |
1205 | /* Description: This function looks for the specified file including its subdirectories beginning */ |
1205 | /* Description: This function looks for the specified file including its subdirectories beginning */ |
1206 | /* in the rootdirectory of the partition. If the file is found the Filepointer properties are */ |
1206 | /* in the rootdirectory of the partition. If the file is found the Filepointer properties are */ |
1207 | /* updated. If file or its subdirectories are not found they will be created */ |
1207 | /* updated. If file or its subdirectories are not found they will be created */ |
1208 | /* */ |
1208 | /* */ |
1209 | /* Returnvalue: 1 if file was created else 0. */ |
1209 | /* Returnvalue: 1 if file was created else 0. */ |
1210 | /********************************************************************************************************************************************/ |
1210 | /********************************************************************************************************************************************/ |
1211 | uint8_t FileCreate(const int8_t* filename, const uint8_t attrib, File_t *file) |
1211 | uint8_t FileCreate(const int8_t* filename, const uint8_t attrib, File_t *file) |
1212 | { |
1212 | { |
1213 | int8_t *path = 0; |
1213 | int8_t *path = 0; |
1214 | int8_t *subpath = 0; |
1214 | int8_t *subpath = 0; |
1215 | uint8_t af, am, file_created = 0; |
1215 | uint8_t af, am, file_created = 0; |
1216 | int8_t dirname[12]; |
1216 | int8_t dirname[12]; |
1217 | 1217 | ||
1218 | // if incomming pointers are useless return immediatly |
1218 | // if incomming pointers are useless return immediatly |
1219 | if ((filename == NULL) || (file == NULL) || (!Partition.IsValid)) return 0; |
1219 | if ((filename == NULL) || (file == NULL) || (!Partition.IsValid)) return 0; |
1220 | 1220 | ||
1221 | // trace along the filepath |
1221 | // trace along the filepath |
1222 | path = (int8_t*)filename; // start a the beginning of the filename string |
1222 | path = (int8_t*)filename; // start a the beginning of the filename string |
1223 | file->DirectorySector = 0; // start at RootDirectory with file search |
1223 | file->DirectorySector = 0; // start at RootDirectory with file search |
1224 | file->DirectoryIndex = 0; |
1224 | file->DirectoryIndex = 0; |
1225 | // as long as the file was not created and the remaining file path is not empty |
1225 | // as long as the file was not created and the remaining file path is not empty |
1226 | while((*path != 0) && !file_created) |
1226 | while((*path != 0) && !file_created) |
1227 | { // separate dirname and subpath from filepath string |
1227 | { // separate dirname and subpath from filepath string |
1228 | subpath = SeperateDirName(path, dirname); |
1228 | subpath = SeperateDirName(path, dirname); |
1229 | if(subpath != NULL) |
1229 | if(subpath != NULL) |
1230 | { |
1230 | { |
1231 | if(*subpath == 0) |
1231 | if(*subpath == 0) |
1232 | { // empty subpath indicates last element of dir chain |
1232 | { // empty subpath indicates last element of dir chain |
1233 | af = ATTR_NONE; |
1233 | af = ATTR_NONE; |
1234 | am = ATTR_SUBDIRECTORY|ATTR_VOLUMELABEL; // any file that is no subdir or volume label |
1234 | am = ATTR_SUBDIRECTORY|ATTR_VOLUMELABEL; // any file that is no subdir or volume label |
1235 | } |
1235 | } |
1236 | else // it must be a subdirectory and no volume label |
1236 | else // it must be a subdirectory and no volume label |
1237 | { |
1237 | { |
1238 | af = ATTR_SUBDIRECTORY; |
1238 | af = ATTR_SUBDIRECTORY; |
1239 | am = ATTR_SUBDIRECTORY|ATTR_VOLUMELABEL; |
1239 | am = ATTR_SUBDIRECTORY|ATTR_VOLUMELABEL; |
1240 | } |
1240 | } |
1241 | if(!DirectoryEntryExist(dirname, af, am, file)) // if subdir or file is not existent |
1241 | if(!DirectoryEntryExist(dirname, af, am, file)) // if subdir or file is not existent |
1242 | { // try to create subdir or file |
1242 | { // try to create subdir or file |
1243 | if(*subpath == 0) af = attrib; // if last element in dir chain take the given attribute |
1243 | if(*subpath == 0) af = attrib; // if last element in dir chain take the given attribute |
1244 | if(!CreateDirectoryEntry(dirname, af, file)) |
1244 | if(!CreateDirectoryEntry(dirname, af, file)) |
1245 | { // could not be created |
1245 | { // could not be created |
1246 | return(file_created); |
1246 | return(file_created); |
1247 | } |
1247 | } |
1248 | else if (*subpath == 0) file_created = 1; // last element of path chain was created |
1248 | else if (*subpath == 0) file_created = 1; // last element of path chain was created |
1249 | } |
1249 | } |
1250 | } |
1250 | } |
1251 | else // error seperating the subpath |
1251 | else // error seperating the subpath |
1252 | { |
1252 | { |
1253 | return file_created; // bad subdir format |
1253 | return file_created; // bad subdir format |
1254 | } |
1254 | } |
1255 | path = subpath; |
1255 | path = subpath; |
1256 | subpath = 0; |
1256 | subpath = 0; |
1257 | } |
1257 | } |
1258 | return (file_created); |
1258 | return (file_created); |
1259 | } |
1259 | } |
1260 | 1260 | ||
1261 | 1261 | ||
1262 | /********************************************************************************************************************************************/ |
1262 | /********************************************************************************************************************************************/ |
1263 | /* Function: File_t * fopen_(int8_t* filename, int8_t mode); */ |
1263 | /* Function: File_t * fopen_(int8_t* filename, int8_t mode); */ |
1264 | /* */ |
1264 | /* */ |
1265 | /* Description: This function looks for the specified file in the rootdirectory of the drive. If the file is found the number of the */ |
1265 | /* Description: This function looks for the specified file in the rootdirectory of the drive. If the file is found the number of the */ |
1266 | /* corrosponding filepointer is returned. Only modes 'r' (reading) and 'a' append are implemented yet. */ |
1266 | /* corrosponding filepointer is returned. Only modes 'r' (reading) and 'a' append are implemented yet. */ |
1267 | /* */ |
1267 | /* */ |
1268 | /* Returnvalue: The filepointer to the file or 0 if faild. */ |
1268 | /* Returnvalue: The filepointer to the file or 0 if faild. */ |
1269 | /********************************************************************************************************************************************/ |
1269 | /********************************************************************************************************************************************/ |
1270 | File_t * fopen_(int8_t * const filename, const int8_t mode) |
1270 | File_t * fopen_(int8_t * const filename, const int8_t mode) |
1271 | { |
1271 | { |
1272 | File_t *file = 0; |
1272 | File_t *file = 0; |
1273 | 1273 | ||
1274 | if((!Partition.IsValid) || (filename == 0)) return(file); |
1274 | if((!Partition.IsValid) || (filename == 0)) return(file); |
1275 | 1275 | ||
1276 | // Look for an unused filepointer in the file pointer list? |
1276 | // Look for an unused filepointer in the file pointer list? |
1277 | file = LockFilePointer(); |
1277 | file = LockFilePointer(); |
1278 | // if no unused file pointer was found return 0 |
1278 | // if no unused file pointer was found return 0 |
1279 | if(file == NULL) return(file); |
1279 | if(file == NULL) return(file); |
1280 | 1280 | ||
1281 | // now we have found a free filepointer and claimed it |
1281 | // now we have found a free filepointer and claimed it |
1282 | // so let initiate its property values |
1282 | // so let initiate its property values |
1283 | file->FirstSectorOfFirstCluster = 0; // Sectorpointer to the first sector of the first datacluster of the file. |
1283 | file->FirstSectorOfFirstCluster = 0; // Sectorpointer to the first sector of the first datacluster of the file. |
1284 | file->FirstSectorOfCurrCluster = 0; // Pointer to the cluster which is edited at the moment. |
1284 | file->FirstSectorOfCurrCluster = 0; // Pointer to the cluster which is edited at the moment. |
1285 | file->SectorOfCurrCluster = 0; // The sector which is edited at the moment (cluster_pointer + sector_index). |
1285 | file->SectorOfCurrCluster = 0; // The sector which is edited at the moment (cluster_pointer + sector_index). |
1286 | file->ByteOfCurrSector = 0; // The bytelocation within the current sector (cluster_pointer + sector_index + byte_index). |
1286 | file->ByteOfCurrSector = 0; // The bytelocation within the current sector (cluster_pointer + sector_index + byte_index). |
1287 | file->Mode = mode; // mode of fileoperation (read,write) |
1287 | file->Mode = mode; // mode of fileoperation (read,write) |
1288 | file->Size = 0; // the size of the opened file in bytes. |
1288 | file->Size = 0; // the size of the opened file in bytes. |
1289 | file->Position = 0; // pointer to a byte within the file 0 < fileposition < filesize |
1289 | file->Position = 0; // pointer to a byte within the file 0 < fileposition < filesize |
1290 | file->SectorInCache = 0; // the last sector read, wich is still in the sectorbuffer. |
1290 | file->SectorInCache = 0; // the last sector read, wich is still in the sectorbuffer. |
1291 | file->DirectorySector = 0; // the sectorposition where the directoryentry has been made. |
1291 | file->DirectorySector = 0; // the sectorposition where the directoryentry has been made. |
1292 | file->DirectoryIndex = 0; // the index to the directoryentry within the specified sector. |
1292 | file->DirectoryIndex = 0; // the index to the directoryentry within the specified sector. |
1293 | file->Attribute = 0; // the attribute of the file opened. |
1293 | file->Attribute = 0; // the attribute of the file opened. |
1294 | 1294 | ||
1295 | // check if a real file (no directory) to the given filename exist |
1295 | // check if a real file (no directory) to the given filename exist |
1296 | if(FileExist(filename, ATTR_NONE, ATTR_SUBDIRECTORY|ATTR_VOLUMELABEL, file)) |
1296 | if(FileExist(filename, ATTR_NONE, ATTR_SUBDIRECTORY|ATTR_VOLUMELABEL, file)) |
1297 | { // file exist |
1297 | { // file exist |
1298 | switch(mode) // check mode |
1298 | switch(mode) // check mode |
1299 | { |
1299 | { |
1300 | case 'a': // if mode is: append to file |
1300 | case 'a': // if mode is: append to file |
1301 | if((file->Attribute & ATTR_READONLY) == ATTR_READONLY) |
1301 | if((file->Attribute & ATTR_READONLY) == ATTR_READONLY) |
1302 | { // file is marked as readonly --> do not open this file |
1302 | { // file is marked as readonly --> do not open this file |
1303 | fclose_(file); |
1303 | fclose_(file); |
1304 | file = NULL; |
1304 | file = NULL; |
1305 | } |
1305 | } |
1306 | else |
1306 | else |
1307 | { // file is not marked as read only --> goto end of file |
1307 | { // file is not marked as read only --> goto end of file |
1308 | fseek_(file, 0, SEEK_END); // point to the end of the file |
1308 | fseek_(file, 0, SEEK_END); // point to the end of the file |
1309 | } |
1309 | } |
1310 | break; |
1310 | break; |
1311 | case 'w': // if mode is: write to file |
1311 | case 'w': // if mode is: write to file |
1312 | if((file->Attribute & ATTR_READONLY) == ATTR_READONLY) |
1312 | if((file->Attribute & ATTR_READONLY) == ATTR_READONLY) |
1313 | { // file is marked as readonly --> do not open this file |
1313 | { // file is marked as readonly --> do not open this file |
1314 | fclose_(file); |
1314 | fclose_(file); |
1315 | file = NULL; |
1315 | file = NULL; |
1316 | } |
1316 | } |
1317 | else |
1317 | else |
1318 | { // file is not marked as read only --> goto start of file |
1318 | { // file is not marked as read only --> goto start of file |
1319 | // free all clusters of that file |
1319 | // free all clusters of that file |
1320 | DeleteClusterChain(SectorToFat16Cluster(file->FirstSectorOfFirstCluster)); |
1320 | DeleteClusterChain(SectorToFat16Cluster(file->FirstSectorOfFirstCluster)); |
1321 | // mar an empy cluster as the last one and store the corresponding sector |
1321 | // mar an empy cluster as the last one and store the corresponding sector |
1322 | file->FirstSectorOfFirstCluster = Fat16ClusterToSector(FindNextFreeCluster(file)); |
1322 | file->FirstSectorOfFirstCluster = Fat16ClusterToSector(FindNextFreeCluster(file)); |
1323 | file->FirstSectorOfCurrCluster = file->FirstSectorOfFirstCluster; |
1323 | file->FirstSectorOfCurrCluster = file->FirstSectorOfFirstCluster; |
1324 | file->SectorOfCurrCluster = 0; |
1324 | file->SectorOfCurrCluster = 0; |
1325 | file->ByteOfCurrSector = 0; |
1325 | file->ByteOfCurrSector = 0; |
1326 | file->Size = 0; |
1326 | file->Size = 0; |
1327 | file->Position = 0; |
1327 | file->Position = 0; |
1328 | fseek_(file, 0, SEEK_SET); |
1328 | fseek_(file, 0, SEEK_SET); |
1329 | } |
1329 | } |
1330 | break; |
1330 | break; |
1331 | case 'r': // if mode is: read from file |
1331 | case 'r': // if mode is: read from file |
1332 | // goto end of file |
1332 | // goto end of file |
1333 | fseek_(file, 0, SEEK_SET); |
1333 | fseek_(file, 0, SEEK_SET); |
1334 | break; |
1334 | break; |
1335 | default: // other modes are not supported |
1335 | default: // other modes are not supported |
1336 | fclose_(file); |
1336 | fclose_(file); |
1337 | file = NULL; |
1337 | file = NULL; |
1338 | break; |
1338 | break; |
1339 | } |
1339 | } |
1340 | return(file); |
1340 | return(file); |
1341 | } |
1341 | } |
1342 | else // file does not exist |
1342 | else // file does not exist |
1343 | { |
1343 | { |
1344 | switch(mode) // check mode |
1344 | switch(mode) // check mode |
1345 | { |
1345 | { |
1346 | case 'a': |
1346 | case 'a': |
1347 | case 'w': // if mode is write or append |
1347 | case 'w': // if mode is write or append |
1348 | // try to create the file |
1348 | // try to create the file |
1349 | if(!FileCreate(filename, ATTR_ARCHIVE, file)) |
1349 | if(!FileCreate(filename, ATTR_ARCHIVE, file)) |
1350 | { // if it could not be created |
1350 | { // if it could not be created |
1351 | fclose_(file); |
1351 | fclose_(file); |
1352 | file = NULL; |
1352 | file = NULL; |
1353 | } |
1353 | } |
1354 | break; |
1354 | break; |
1355 | case 'r': // else opened for 'r' |
1355 | case 'r': // else opened for 'r' |
1356 | default: // of unsupported mode |
1356 | default: // of unsupported mode |
1357 | fclose_(file); |
1357 | fclose_(file); |
1358 | file = NULL; |
1358 | file = NULL; |
1359 | break; |
1359 | break; |
1360 | } |
1360 | } |
1361 | return(file); |
1361 | return(file); |
1362 | } |
1362 | } |
1363 | // we should never come to this point |
1363 | // we should never come to this point |
1364 | fclose_(file); |
1364 | fclose_(file); |
1365 | file = NULL; |
1365 | file = NULL; |
1366 | return(file); |
1366 | return(file); |
1367 | } |
1367 | } |
1368 | 1368 | ||
1369 | /****************************************************************************************************************************************************/ |
1369 | /****************************************************************************************************************************************************/ |
1370 | /* Function: fflush_(File *); */ |
1370 | /* Function: fflush_(File *); */ |
1371 | /* */ |
1371 | /* */ |
1372 | /* Description: This function writes the data already in the buffer but not yet written to the file. */ |
1372 | /* Description: This function writes the data already in the buffer but not yet written to the file. */ |
1373 | /* */ |
1373 | /* */ |
1374 | /* Returnvalue: 0 on success EOF on error */ |
1374 | /* Returnvalue: 0 on success EOF on error */ |
1375 | /****************************************************************************************************************************************************/ |
1375 | /****************************************************************************************************************************************************/ |
1376 | int16_t fflush_(File_t * const file) |
1376 | int16_t fflush_(File_t * const file) |
1377 | { |
1377 | { |
1378 | DirEntry_t *dir; |
1378 | DirEntry_t *dir; |
1379 | 1379 | ||
1380 | if((file == NULL) || (!Partition.IsValid)) return (EOF); |
1380 | if((file == NULL) || (!Partition.IsValid)) return (EOF); |
1381 | 1381 | ||
1382 | switch(file->Mode) |
1382 | switch(file->Mode) |
1383 | { |
1383 | { |
1384 | case 'a': |
1384 | case 'a': |
1385 | case 'w': |
1385 | case 'w': |
1386 | if(file->ByteOfCurrSector > 0) // has data been added to the file? |
1386 | if(file->ByteOfCurrSector > 0) // has data been added to the file? |
1387 | { |
1387 | { |
1388 | if(SD_SUCCESS != SDC_PutSector(file->SectorInCache, file->Cache))// save the data still in the buffer |
1388 | if(SD_SUCCESS != SDC_PutSector(file->SectorInCache, file->Cache))// save the data still in the buffer |
1389 | { |
1389 | { |
1390 | Fat16_Deinit(); |
1390 | Fat16_Deinit(); |
1391 | return(EOF); |
1391 | return(EOF); |
1392 | } |
1392 | } |
1393 | } |
1393 | } |
1394 | file->SectorInCache = file->DirectorySector; |
1394 | file->SectorInCache = file->DirectorySector; |
1395 | if(SD_SUCCESS != SDC_GetSector(file->SectorInCache, file->Cache)) // read the directory entry for this file. |
1395 | if(SD_SUCCESS != SDC_GetSector(file->SectorInCache, file->Cache)) // read the directory entry for this file. |
1396 | { |
1396 | { |
1397 | Fat16_Deinit(); |
1397 | Fat16_Deinit(); |
1398 | return(EOF); |
1398 | return(EOF); |
1399 | } |
1399 | } |
1400 | 1400 | ||
1401 | dir = (DirEntry_t *)file->Cache; |
1401 | dir = (DirEntry_t *)file->Cache; |
1402 | dir[file->DirectoryIndex].Size = file->Size; // update file size |
1402 | dir[file->DirectoryIndex].Size = file->Size; // update file size |
1403 | dir[file->DirectoryIndex].DateTime = FileDateTime(&SystemTime); // update date time |
1403 | dir[file->DirectoryIndex].DateTime = FileDateTime(&SystemTime); // update date time |
1404 | if(SD_SUCCESS != SDC_PutSector(file->SectorInCache, file->Cache)) // write back to sd-card |
1404 | if(SD_SUCCESS != SDC_PutSector(file->SectorInCache, file->Cache)) // write back to sd-card |
1405 | { |
1405 | { |
1406 | Fat16_Deinit(); |
1406 | Fat16_Deinit(); |
1407 | return(EOF); |
1407 | return(EOF); |
1408 | } |
1408 | } |
1409 | break; |
1409 | break; |
1410 | case 'r': |
1410 | case 'r': |
1411 | default: |
1411 | default: |
1412 | return(EOF); |
1412 | return(EOF); |
1413 | break; |
1413 | break; |
1414 | 1414 | ||
1415 | } |
1415 | } |
1416 | return(0); |
1416 | return(0); |
1417 | } |
1417 | } |
1418 | 1418 | ||
1419 | /****************************************************************************************************************************************/ |
1419 | /****************************************************************************************************************************************/ |
1420 | /* Function: fclose_(File *file); */ |
1420 | /* Function: fclose_(File *file); */ |
1421 | /* */ |
1421 | /* */ |
1422 | /* Description: This function closes the open file by writing the remaining data */ |
1422 | /* Description: This function closes the open file by writing the remaining data */ |
1423 | /* from the buffer to the device and entering the filesize in the directory entry. */ |
1423 | /* from the buffer to the device and entering the filesize in the directory entry. */ |
1424 | /* */ |
1424 | /* */ |
1425 | /* Returnvalue: 0 on success EOF on error */ |
1425 | /* Returnvalue: 0 on success EOF on error */ |
1426 | /****************************************************************************************************************************************/ |
1426 | /****************************************************************************************************************************************/ |
1427 | int16_t fclose_(File_t *file) |
1427 | int16_t fclose_(File_t *file) |
1428 | { |
1428 | { |
1429 | int16_t returnvalue = EOF; |
1429 | int16_t returnvalue = EOF; |
1430 | 1430 | ||
1431 | if(file == NULL) return(returnvalue); |
1431 | if(file == NULL) return(returnvalue); |
1432 | returnvalue = fflush_(file); |
1432 | returnvalue = fflush_(file); |
1433 | UnlockFilePointer(file); |
1433 | UnlockFilePointer(file); |
1434 | return(returnvalue); |
1434 | return(returnvalue); |
1435 | } |
1435 | } |
1436 | 1436 | ||
1437 | /********************************************************************************************************************************************/ |
1437 | /********************************************************************************************************************************************/ |
1438 | /* Function: fgetc_(File *file); */ |
1438 | /* Function: fgetc_(File *file); */ |
1439 | /* */ |
1439 | /* */ |
1440 | /* Description: This function reads and returns one character from the specified file. Is the end of the actual sector reached the */ |
1440 | /* Description: This function reads and returns one character from the specified file. Is the end of the actual sector reached the */ |
1441 | /* next sector of the cluster is read. If the last sector of the cluster read the next cluster will be searched in FAT. */ |
1441 | /* next sector of the cluster is read. If the last sector of the cluster read the next cluster will be searched in FAT. */ |
1442 | /* */ |
1442 | /* */ |
1443 | /* Returnvalue: The function returns the character read from the specified memorylocation as u8 casted to s16 or EOF. */ |
1443 | /* Returnvalue: The function returns the character read from the specified memorylocation as u8 casted to s16 or EOF. */ |
1444 | /********************************************************************************************************************************************/ |
1444 | /********************************************************************************************************************************************/ |
1445 | int16_t fgetc_(File_t * const file) |
1445 | int16_t fgetc_(File_t * const file) |
1446 | { |
1446 | { |
1447 | int16_t c = EOF; |
1447 | int16_t c = EOF; |
1448 | uint32_t curr_sector; |
1448 | uint32_t curr_sector; |
1449 | 1449 | ||
1450 | if( (!Partition.IsValid) || (file == NULL)) return(c); |
1450 | if( (!Partition.IsValid) || (file == NULL)) return(c); |
1451 | // if the end of the file is not reached, get the next character. |
1451 | // if the end of the file is not reached, get the next character. |
1452 | if((0 < file->Size) && ((file->Position+1) < file->Size) ) |
1452 | if((0 < file->Size) && ((file->Position+1) < file->Size) ) |
1453 | { |
1453 | { |
1454 | curr_sector = file->FirstSectorOfCurrCluster; // calculate the sector of the next character to be read. |
1454 | curr_sector = file->FirstSectorOfCurrCluster; // calculate the sector of the next character to be read. |
1455 | curr_sector += file->SectorOfCurrCluster; |
1455 | curr_sector += file->SectorOfCurrCluster; |
1456 | 1456 | ||
1457 | if(file->SectorInCache != curr_sector) |
1457 | if(file->SectorInCache != curr_sector) |
1458 | { |
1458 | { |
1459 | file->SectorInCache = curr_sector; |
1459 | file->SectorInCache = curr_sector; |
1460 | if(SD_SUCCESS != SDC_GetSector(file->SectorInCache,file->Cache)) |
1460 | if(SD_SUCCESS != SDC_GetSector(file->SectorInCache,file->Cache)) |
1461 | { |
1461 | { |
1462 | Fat16_Deinit(); |
1462 | Fat16_Deinit(); |
1463 | return(c); |
1463 | return(c); |
1464 | } |
1464 | } |
1465 | } |
1465 | } |
1466 | c = (int16_t) file->Cache[file->ByteOfCurrSector]; |
1466 | c = (int16_t) file->Cache[file->ByteOfCurrSector]; |
1467 | file->Position++; // increment file position |
1467 | file->Position++; // increment file position |
1468 | file->ByteOfCurrSector++; // goto next byte in sector |
1468 | file->ByteOfCurrSector++; // goto next byte in sector |
1469 | if(file->ByteOfCurrSector >= BYTES_PER_SECTOR) // if end of sector |
1469 | if(file->ByteOfCurrSector >= BYTES_PER_SECTOR) // if end of sector |
1470 | { |
1470 | { |
1471 | file->ByteOfCurrSector = 0; // reset byte location |
1471 | file->ByteOfCurrSector = 0; // reset byte location |
1472 | file->SectorOfCurrCluster++; // next sector |
1472 | file->SectorOfCurrCluster++; // next sector |
1473 | if(file->SectorOfCurrCluster >= Partition.SectorsPerCluster) // if end of cluster is reached, the next datacluster has to be searched in the FAT. |
1473 | if(file->SectorOfCurrCluster >= Partition.SectorsPerCluster) // if end of cluster is reached, the next datacluster has to be searched in the FAT. |
1474 | { |
1474 | { |
1475 | 1475 | ||
1476 | if(GetNextCluster(file)) // Sets the clusterpointer of the file to the next datacluster. |
1476 | if(GetNextCluster(file)) // Sets the clusterpointer of the file to the next datacluster. |
1477 | { |
1477 | { |
1478 | file->SectorOfCurrCluster = 0; // start reading new cluster at first sector of the cluster. |
1478 | file->SectorOfCurrCluster = 0; // start reading new cluster at first sector of the cluster. |
1479 | } |
1479 | } |
1480 | else // the last cluster was allready reached |
1480 | else // the last cluster was allready reached |
1481 | { |
1481 | { |
1482 | file->SectorOfCurrCluster--; // jump back to the last sector in the last cluster |
1482 | file->SectorOfCurrCluster--; // jump back to the last sector in the last cluster |
1483 | file->ByteOfCurrSector = BYTES_PER_SECTOR; // set ByteOfCurrSector one byte over sector end |
1483 | file->ByteOfCurrSector = BYTES_PER_SECTOR; // set ByteOfCurrSector one byte over sector end |
1484 | } |
1484 | } |
1485 | } |
1485 | } |
1486 | } |
1486 | } |
1487 | } |
1487 | } |
1488 | return(c); |
1488 | return(c); |
1489 | } |
1489 | } |
1490 | 1490 | ||
1491 | /********************************************************************************************************************************************/ |
1491 | /********************************************************************************************************************************************/ |
1492 | /* Function: fputc_( const s8 c, File *file); */ |
1492 | /* Function: fputc_( const s8 c, File *file); */ |
1493 | /* */ |
1493 | /* */ |
1494 | /* Description: This function writes a byte to the specified file and takes care of writing the necessary FAT- Entries. */ |
1494 | /* Description: This function writes a byte to the specified file and takes care of writing the necessary FAT- Entries. */ |
1495 | /* next sector of the cluster is read. If the last sector of the cluster read the next cluster will be searched in FAT. */ |
1495 | /* next sector of the cluster is read. If the last sector of the cluster read the next cluster will be searched in FAT. */ |
1496 | /* */ |
1496 | /* */ |
1497 | /* Returnvalue: The function returns the character written to the stream or EOF on error. */ |
1497 | /* Returnvalue: The function returns the character written to the stream or EOF on error. */ |
1498 | /********************************************************************************************************************************************/ |
1498 | /********************************************************************************************************************************************/ |
1499 | int16_t fputc_(const int8_t c, File_t * const file) |
1499 | int16_t fputc_(const int8_t c, File_t * const file) |
1500 | { |
1500 | { |
1501 | uint32_t curr_sector = 0; |
1501 | uint32_t curr_sector = 0; |
1502 | 1502 | ||
1503 | if((!Partition.IsValid) || (file == NULL)) return(EOF); |
1503 | if((!Partition.IsValid) || (file == NULL)) return(EOF); |
1504 | 1504 | ||
1505 | // If file position equals to file size, then the end of file has reached. |
1505 | // If file position equals to file size, then the end of file has reached. |
1506 | // In this chase it has to be checked that the ByteOfCurrSector is BYTES_PER_SECTOR |
1506 | // In this chase it has to be checked that the ByteOfCurrSector is BYTES_PER_SECTOR |
1507 | // and a new cluster should be appended. |
1507 | // and a new cluster should be appended. |
1508 | if((file->Position >= file->Size) && (file->ByteOfCurrSector >= BYTES_PER_SECTOR)) |
1508 | if((file->Position >= file->Size) && (file->ByteOfCurrSector >= BYTES_PER_SECTOR)) |
1509 | { |
1509 | { |
1510 | if(!AppendCluster(file)) return(EOF); |
1510 | if(!AppendCluster(file)) return(EOF); |
1511 | } |
1511 | } |
1512 | 1512 | ||
1513 | curr_sector = file->FirstSectorOfCurrCluster; |
1513 | curr_sector = file->FirstSectorOfCurrCluster; |
1514 | curr_sector += file->SectorOfCurrCluster; |
1514 | curr_sector += file->SectorOfCurrCluster; |
1515 | if(file->SectorInCache != curr_sector) |
1515 | if(file->SectorInCache != curr_sector) |
1516 | { |
1516 | { |
1517 | file->SectorInCache = curr_sector; |
1517 | file->SectorInCache = curr_sector; |
1518 | if(SD_SUCCESS != SDC_GetSector(file->SectorInCache, file->Cache)) |
1518 | if(SD_SUCCESS != SDC_GetSector(file->SectorInCache, file->Cache)) |
1519 | { |
1519 | { |
1520 | Fat16_Deinit(); |
1520 | Fat16_Deinit(); |
1521 | return(EOF); |
1521 | return(EOF); |
1522 | } |
1522 | } |
1523 | } |
1523 | } |
1524 | 1524 | ||
1525 | file->Cache[file->ByteOfCurrSector] = (uint8_t)c; // write databyte into the buffer. The byte will be written to the device at once |
1525 | file->Cache[file->ByteOfCurrSector] = (uint8_t)c; // write databyte into the buffer. The byte will be written to the device at once |
1526 | if(file->Size == file->Position) file->Size++; // a character has been written to the file so the size is incremented only when the character has been added at the end of the file. |
1526 | if(file->Size == file->Position) file->Size++; // a character has been written to the file so the size is incremented only when the character has been added at the end of the file. |
1527 | file->Position++; // the actual positon within the file. |
1527 | file->Position++; // the actual positon within the file. |
1528 | file->ByteOfCurrSector++; // goto next byte in sector |
1528 | file->ByteOfCurrSector++; // goto next byte in sector |
1529 | if(file->ByteOfCurrSector >= BYTES_PER_SECTOR) // if the end of this sector is reached yet |
1529 | if(file->ByteOfCurrSector >= BYTES_PER_SECTOR) // if the end of this sector is reached yet |
1530 | { // save the sector to the sd-card |
1530 | { // save the sector to the sd-card |
1531 | if(SD_SUCCESS != SDC_PutSector(file->SectorInCache, file->Cache)) |
1531 | if(SD_SUCCESS != SDC_PutSector(file->SectorInCache, file->Cache)) |
1532 | { |
1532 | { |
1533 | Fat16_Deinit(); |
1533 | Fat16_Deinit(); |
1534 | return(EOF); |
1534 | return(EOF); |
1535 | } |
1535 | } |
1536 | file->ByteOfCurrSector = 0; // reset byte location |
1536 | file->ByteOfCurrSector = 0; // reset byte location |
1537 | file->SectorOfCurrCluster++; // next sector |
1537 | file->SectorOfCurrCluster++; // next sector |
1538 | if(file->SectorOfCurrCluster >= Partition.SectorsPerCluster)// if end of cluster is reached, the next datacluster has to be searched in the FAT. |
1538 | if(file->SectorOfCurrCluster >= Partition.SectorsPerCluster)// if end of cluster is reached, the next datacluster has to be searched in the FAT. |
1539 | { |
1539 | { |
1540 | if(!GetNextCluster(file)) // Sets the clusterpointer of the file to the next datacluster. |
1540 | if(!GetNextCluster(file)) // Sets the clusterpointer of the file to the next datacluster. |
1541 | { // if current cluster was the last cluster of the file |
1541 | { // if current cluster was the last cluster of the file |
1542 | if(!AppendCluster(file)) // append a new and free cluster at the end of the file. |
1542 | if(!AppendCluster(file)) // append a new and free cluster at the end of the file. |
1543 | { |
1543 | { |
1544 | file->SectorOfCurrCluster--; // jump back to last sector of last cluster |
1544 | file->SectorOfCurrCluster--; // jump back to last sector of last cluster |
1545 | file->ByteOfCurrSector = BYTES_PER_SECTOR; // set byte location to 1 byte over sector len |
1545 | file->ByteOfCurrSector = BYTES_PER_SECTOR; // set byte location to 1 byte over sector len |
1546 | return(EOF); |
1546 | return(EOF); |
1547 | } |
1547 | } |
1548 | } |
1548 | } |
1549 | else // next cluster |
1549 | else // next cluster |
1550 | { |
1550 | { |
1551 | file->SectorOfCurrCluster = 0; // start reading new cluster at first sector of the cluster. |
1551 | file->SectorOfCurrCluster = 0; // start reading new cluster at first sector of the cluster. |
1552 | } |
1552 | } |
1553 | } |
1553 | } |
1554 | } |
1554 | } |
1555 | return(0); |
1555 | return(0); |
1556 | } |
1556 | } |
1557 | 1557 | ||
1558 | 1558 | ||
1559 | /****************************************************************************************************************************************/ |
1559 | /****************************************************************************************************************************************/ |
1560 | /* Function: fread_(void *buffer, uint32_t size, uint32_t count, File *File); */ |
1560 | /* Function: fread_(void *buffer, uint32_t size, uint32_t count, File *File); */ |
1561 | /* */ |
1561 | /* */ |
1562 | /* Description: This function reads count objects of the specified size */ |
1562 | /* Description: This function reads count objects of the specified size */ |
1563 | /* from the actual position of the file to the specified buffer. */ |
1563 | /* from the actual position of the file to the specified buffer. */ |
1564 | /* */ |
1564 | /* */ |
1565 | /* Returnvalue: The function returns the number of objects (not bytes) read from the file. */ |
1565 | /* Returnvalue: The function returns the number of objects (not bytes) read from the file. */ |
1566 | /****************************************************************************************************************************************/ |
1566 | /****************************************************************************************************************************************/ |
1567 | uint32_t fread_(void * const buffer, uint32_t size, uint32_t count, File_t * const file) |
1567 | uint32_t fread_(void * const buffer, uint32_t size, uint32_t count, File_t * const file) |
1568 | { |
1568 | { |
1569 | uint32_t object_cnt = 0; // count the number of objects read from the file. |
1569 | uint32_t object_cnt = 0; // count the number of objects read from the file. |
1570 | uint32_t object_size = 0; // count the number of bytes read from the actual object. |
1570 | uint32_t object_size = 0; // count the number of bytes read from the actual object. |
1571 | uint8_t *pbuff = 0; // a pointer to the actual bufferposition. |
1571 | uint8_t *pbuff = 0; // a pointer to the actual bufferposition. |
1572 | uint8_t success = 1; // no error occured during read operation to the file. |
1572 | uint8_t success = 1; // no error occured during read operation to the file. |
1573 | int16_t c; |
1573 | int16_t c; |
1574 | 1574 | ||
1575 | if((!Partition.IsValid) || (file == NULL) || (buffer == NULL)) return(0); |
1575 | if((!Partition.IsValid) || (file == NULL) || (buffer == NULL)) return(0); |
1576 | 1576 | ||
1577 | pbuff = (uint8_t *) buffer; // cast the void pointer to an u8 * |
1577 | pbuff = (uint8_t *) buffer; // cast the void pointer to an u8 * |
1578 | 1578 | ||
1579 | while((object_cnt < count) && success) |
1579 | while((object_cnt < count) && success) |
1580 | { |
1580 | { |
1581 | object_size = size; |
1581 | object_size = size; |
1582 | while((size > 0) && success) |
1582 | while((size > 0) && success) |
1583 | { |
1583 | { |
1584 | c = fgetc_(file); |
1584 | c = fgetc_(file); |
1585 | if(c != EOF) |
1585 | if(c != EOF) |
1586 | { |
1586 | { |
1587 | *pbuff = (uint8_t)c; // read a byte from the buffer to the opened file. |
1587 | *pbuff = (uint8_t)c; // read a byte from the buffer to the opened file. |
1588 | pbuff++; |
1588 | pbuff++; |
1589 | size--; |
1589 | size--; |
1590 | } |
1590 | } |
1591 | else // error or end of file reached |
1591 | else // error or end of file reached |
1592 | { |
1592 | { |
1593 | success = 0; |
1593 | success = 0; |
1594 | } |
1594 | } |
1595 | } |
1595 | } |
1596 | if(success) object_cnt++; |
1596 | if(success) object_cnt++; |
1597 | } |
1597 | } |
1598 | return(object_cnt); // return the number of objects succesfully read from the file |
1598 | return(object_cnt); // return the number of objects succesfully read from the file |
1599 | } |
1599 | } |
1600 | 1600 | ||
1601 | 1601 | ||
1602 | /****************************************************************************************************************************************/ |
1602 | /****************************************************************************************************************************************/ |
1603 | /* Function: fwrite_(void *buffer, uint32_t size, uint32_t count, File *file); */ |
1603 | /* Function: fwrite_(void *buffer, uint32_t size, uint32_t count, File *file); */ |
1604 | /* */ |
1604 | /* */ |
1605 | /* Description: This function writes count objects of the specified size */ |
1605 | /* Description: This function writes count objects of the specified size */ |
1606 | /* from the buffer pointer to the actual position in the file. */ |
1606 | /* from the buffer pointer to the actual position in the file. */ |
1607 | /* */ |
1607 | /* */ |
1608 | /* Returnvalue: The function returns the number of objects (not bytes) read from the file. */ |
1608 | /* Returnvalue: The function returns the number of objects (not bytes) read from the file. */ |
1609 | /****************************************************************************************************************************************/ |
1609 | /****************************************************************************************************************************************/ |
1610 | uint32_t fwrite_(void * const buffer, uint32_t size, uint32_t count, File_t * const file) |
1610 | uint32_t fwrite_(void * const buffer, uint32_t size, uint32_t count, File_t * const file) |
1611 | { |
1611 | { |
1612 | uint32_t object_cnt = 0; // count the number of objects written to the file. |
1612 | uint32_t object_cnt = 0; // count the number of objects written to the file. |
1613 | uint32_t object_size = 0; // count the number of bytes written from the actual object. |
1613 | uint32_t object_size = 0; // count the number of bytes written from the actual object. |
1614 | uint8_t *pbuff = 0; // a pointer to the actual bufferposition. |
1614 | uint8_t *pbuff = 0; // a pointer to the actual bufferposition. |
1615 | uint8_t success = 1; // no error occured during write operation to the file. |
1615 | uint8_t success = 1; // no error occured during write operation to the file. |
1616 | int16_t c; |
1616 | int16_t c; |
1617 | 1617 | ||
1618 | if((!Partition.IsValid) || (file == NULL) || (buffer == NULL)) return(0); |
1618 | if((!Partition.IsValid) || (file == NULL) || (buffer == NULL)) return(0); |
1619 | 1619 | ||
1620 | pbuff = (uint8_t *) buffer; // cast the void pointer to an u8 * |
1620 | pbuff = (uint8_t *) buffer; // cast the void pointer to an u8 * |
1621 | 1621 | ||
1622 | while((object_cnt < count) && success) |
1622 | while((object_cnt < count) && success) |
1623 | { |
1623 | { |
1624 | object_size = size; |
1624 | object_size = size; |
1625 | while((size > 0) && success) |
1625 | while((size > 0) && success) |
1626 | { |
1626 | { |
1627 | c = fputc_(*pbuff, file); // write a byte from the buffer to the opened file. |
1627 | c = fputc_(*pbuff, file); // write a byte from the buffer to the opened file. |
1628 | if(c != EOF) |
1628 | if(c != EOF) |
1629 | { |
1629 | { |
1630 | pbuff++; |
1630 | pbuff++; |
1631 | size--; |
1631 | size--; |
1632 | } |
1632 | } |
1633 | else |
1633 | else |
1634 | { |
1634 | { |
1635 | success = 0; |
1635 | success = 0; |
1636 | } |
1636 | } |
1637 | } |
1637 | } |
1638 | if(success) object_cnt++; |
1638 | if(success) object_cnt++; |
1639 | } |
1639 | } |
1640 | 1640 | ||
1641 | return(object_cnt); // return the number of objects succesfully written to the file |
1641 | return(object_cnt); // return the number of objects succesfully written to the file |
1642 | } |
1642 | } |
1643 | 1643 | ||
1644 | 1644 | ||
1645 | /****************************************************************************************************************************************/ |
1645 | /****************************************************************************************************************************************/ |
1646 | /* Function: fputs_(const int8_t *string, File_t *File); */ |
1646 | /* Function: fputs_(const int8_t *string, File_t *File); */ |
1647 | /* */ |
1647 | /* */ |
1648 | /* Description: This function writes a string to the specified file. */ |
1648 | /* Description: This function writes a string to the specified file. */ |
1649 | /* */ |
1649 | /* */ |
1650 | /* Returnvalue: The function returns a no negative value or EOF on error. */ |
1650 | /* Returnvalue: The function returns a no negative value or EOF on error. */ |
1651 | /****************************************************************************************************************************************/ |
1651 | /****************************************************************************************************************************************/ |
1652 | int16_t fputs_(int8_t * const string, File_t * const file) |
1652 | int16_t fputs_(int8_t * const string, File_t * const file) |
1653 | { |
1653 | { |
1654 | uint8_t i=0; |
1654 | uint8_t i=0; |
1655 | int16_t c = 0; |
1655 | int16_t c = 0; |
1656 | 1656 | ||
1657 | if((!Partition.IsValid) || (file == NULL) || (string == NULL)) return(0); |
1657 | if((!Partition.IsValid) || (file == NULL) || (string == NULL)) return(0); |
1658 | 1658 | ||
1659 | while((string[i] != 0)&& (c != EOF)) |
1659 | while((string[i] != 0)&& (c != EOF)) |
1660 | { |
1660 | { |
1661 | c = fputc_(string[i], file); |
1661 | c = fputc_(string[i], file); |
1662 | i++; |
1662 | i++; |
1663 | } |
1663 | } |
1664 | return(c); |
1664 | return(c); |
1665 | } |
1665 | } |
1666 | 1666 | ||
1667 | /****************************************************************************************************************************************/ |
1667 | /****************************************************************************************************************************************/ |
1668 | /* Function: fgets_(int8 *, int16_t , File_t *); */ |
1668 | /* Function: fgets_(int8 *, int16_t , File_t *); */ |
1669 | /* */ |
1669 | /* */ |
1670 | /* Description: This function reads a string from the file to the specifies string. */ |
1670 | /* Description: This function reads a string from the file to the specifies string. */ |
1671 | /* */ |
1671 | /* */ |
1672 | /* Returnvalue: A pointer to the string read from the file or 0 on error. */ |
1672 | /* Returnvalue: A pointer to the string read from the file or 0 on error. */ |
1673 | /****************************************************************************************************************************************/ |
1673 | /****************************************************************************************************************************************/ |
1674 | int8_t * fgets_(int8_t * const string, int16_t length, File_t * const file) |
1674 | int8_t * fgets_(int8_t * const string, int16_t length, File_t * const file) |
1675 | { |
1675 | { |
1676 | int8_t *pbuff; |
1676 | int8_t *pbuff; |
1677 | int16_t c = 0, bytecount; |
1677 | int16_t c = 0, bytecount; |
1678 | 1678 | ||
- | 1679 | if( (!Partition.IsValid) || (file == NULL) || (string == NULL) || (length < 1) ) return (0); |
|
1679 | if((!Partition.IsValid) || (file == NULL) || (string == NULL) || (length > 1)) return (0); |
1680 | |
1680 | pbuff = string; |
1681 | pbuff = string; |
1681 | bytecount = length; |
1682 | bytecount = length; |
1682 | while(bytecount > 1) // read the count-1 characters from the file to the string. |
1683 | while(bytecount > 1) // read the count-1 characters from the file to the string. |
1683 | { |
1684 | { |
1684 | c = fgetc_(file); // read a character from the opened file. |
1685 | c = fgetc_(file); // read a character from the opened file. |
- | 1686 | ||
1685 | switch(c) |
1687 | switch(c) |
1686 | { |
1688 | { |
1687 | case 0x0A: |
1689 | case 0x0A: |
1688 | *pbuff = 0; // set string terminator |
1690 | *pbuff = 0; // set string terminator |
1689 | return(string); // stop loop |
1691 | return(string); // stop loop |
1690 | break; |
1692 | break; |
1691 | 1693 | ||
1692 | case EOF: |
1694 | case EOF: |
1693 | *pbuff = 0; // set string terminator |
1695 | *pbuff = 0; // set string terminator |
1694 | return(0); |
1696 | return(0); |
1695 | default: |
1697 | default: |
1696 | *pbuff++ = (int8_t)c; // copy byte to string |
1698 | *pbuff++ = (int8_t)c; // copy byte to string |
1697 | bytecount--; |
1699 | bytecount--; |
1698 | break; |
1700 | break; |
1699 | } |
1701 | } |
1700 | } |
1702 | } |
1701 | *pbuff = 0; |
1703 | *pbuff = 0; |
1702 | return(string); |
1704 | return(string); |
1703 | } |
1705 | } |
1704 | 1706 | ||
1705 | /****************************************************************************************************************************************/ |
1707 | /****************************************************************************************************************************************/ |
1706 | /* Function: fexist_(const int8_t*); */ |
1708 | /* Function: fexist_(const int8_t*); */ |
1707 | /* */ |
1709 | /* */ |
1708 | /* Description: This function checks if a file already exist. */ |
1710 | /* Description: This function checks if a file already exist. */ |
1709 | /* */ |
1711 | /* */ |
1710 | /* Returnvalue: 1 if the file exist else 0. */ |
1712 | /* Returnvalue: 1 if the file exist else 0. */ |
1711 | /****************************************************************************************************************************************/ |
1713 | /****************************************************************************************************************************************/ |
1712 | uint8_t fexist_(int8_t* const filename) |
1714 | uint8_t fexist_(int8_t* const filename) |
1713 | { |
1715 | { |
1714 | uint8_t exist = 0; |
1716 | uint8_t exist = 0; |
1715 | File_t *file = 0; |
1717 | File_t *file = 0; |
1716 | file = LockFilePointer(); |
1718 | file = LockFilePointer(); |
1717 | exist = FileExist(filename, ATTR_NONE, ATTR_SUBDIRECTORY|ATTR_VOLUMELABEL, file); |
1719 | exist = FileExist(filename, ATTR_NONE, ATTR_SUBDIRECTORY|ATTR_VOLUMELABEL, file); |
1718 | UnlockFilePointer(file); |
1720 | UnlockFilePointer(file); |
1719 | return(exist); |
1721 | return(exist); |
1720 | } |
1722 | } |
1721 | 1723 | ||
1722 | /****************************************************************************************************************************************/ |
1724 | /****************************************************************************************************************************************/ |
1723 | /* Function: feof_(File_t *File); */ |
1725 | /* Function: feof_(File_t *File); */ |
1724 | /* */ |
1726 | /* */ |
1725 | /* Description: This function checks wether the end of the file has been reached. */ |
1727 | /* Description: This function checks wether the end of the file has been reached. */ |
1726 | /* */ |
1728 | /* */ |
1727 | /* Returnvalue: 0 if the end of the file was not reached otherwise 1. */ |
1729 | /* Returnvalue: 0 if the end of the file was not reached otherwise 1. */ |
1728 | /****************************************************************************************************************************************/ |
1730 | /****************************************************************************************************************************************/ |
1729 | uint8_t feof_(File_t *file) |
1731 | uint8_t feof_(File_t *file) |
1730 | { |
1732 | { |
1731 | if(((file->Position)+1) < (file->Size)) |
1733 | if(((file->Position)+1) < (file->Size)) |
1732 | { |
1734 | { |
1733 | return(0); |
1735 | return(0); |
1734 | } |
1736 | } |
1735 | else |
1737 | else |
1736 | { |
1738 | { |
1737 | return(1); |
1739 | return(1); |
1738 | } |
1740 | } |
1739 | } |
1741 | } |
1740 | 1742 | ||
1741 | 1743 | ||
1742 | 1744 |