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| Rev 380 | Rev 383 | ||
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| Line 60... | Line 60... | ||
| 60 | #include "fat16.h" |
60 | #include "fat16.h" |
| 61 | #include "sdc.h" |
61 | #include "sdc.h" |
| 62 | #include "uart1.h" |
62 | #include "uart1.h" |
| 63 | #include "main.h" |
63 | #include "main.h" |
| Line -... | Line 64... | ||
| - | 64 | ||
| 64 | 65 | ||
| 65 | //________________________________________________________________________________________________________________________________________ |
66 | //________________________________________________________________________________________________________________________________________ |
| 66 | // Module name: fat16.c |
67 | // Module name: fat16.c |
| 67 | // Compiler used: avr-gcc 3.4.5 |
68 | // Compiler used: avr-gcc 3.4.5 |
| 68 | // Last Modifikation: 20.03.2010 |
69 | // Last Modifikation: 20.03.2010 |
| Line 981... | Line 982... | ||
| 981 | u16 AppendCluster(File_t *file) |
982 | u16 AppendCluster(File_t *file) |
| 982 | { |
983 | { |
| 983 | u16 last_cluster, new_cluster = CLUSTER_UNDEFINED; |
984 | u16 last_cluster, new_cluster = CLUSTER_UNDEFINED; |
| 984 | u32 fat_byte_offset, sector, byte; |
985 | u32 fat_byte_offset, sector, byte; |
| 985 | Fat16Entry_t * fat; |
986 | Fat16Entry_t * fat; |
| 986 | // s8 text[64]; |
- | |
| Line 987... | Line 987... | ||
| 987 | 987 | ||
| Line 988... | Line 988... | ||
| 988 | if((!Partition.IsValid) || (file == NULL)) return(new_cluster); |
988 | if((!Partition.IsValid) || (file == NULL)) return(new_cluster); |
| 989 | 989 | ||
| 990 | new_cluster = FindNextFreeCluster(file); // the next free cluster found on the disk. |
990 | new_cluster = FindNextFreeCluster(file); // the next free cluster found on the disk. |
| 991 | if(new_cluster != CLUSTER_UNDEFINED) |
- | |
| 992 | { // A free cluster was found and can be added to the end of the file. |
- | |
| 993 | // is there at least one cluster appended to the file? |
- | |
| 994 | if(file->FirstSectorOfLastCluster == CLUSTER_UNDEFINED) |
991 | if(new_cluster != CLUSTER_UNDEFINED) |
| 995 | { |
- | |
| 996 | fseek_(file, 0, SEEK_END); // jump to the end of the file |
- | |
| 997 | // remember the first sector of the last cluster |
992 | { // A free cluster was found and can be added to the end of the file. |
| 998 | file->FirstSectorOfLastCluster = file->FirstSectorOfCurrCluster; |
- | |
| 999 | last_cluster = SectorToFat16Cluster(file->FirstSectorOfCurrCluster); // determine current file cluster |
- | |
| 1000 | } |
- | |
| 1001 | else |
- | |
| 1002 | { |
- | |
| 1003 | last_cluster = SectorToFat16Cluster(file->FirstSectorOfLastCluster); // determine current file cluster |
- | |
| 1004 | } |
993 | fseek_(file, 0, SEEK_END); // jump to the end of the file |
| 1005 | 994 | last_cluster = SectorToFat16Cluster(file->FirstSectorOfCurrCluster); // determine current file cluster |
|
| 1006 | if(last_cluster != CLUSTER_UNDEFINED) |
995 | if(last_cluster != CLUSTER_UNDEFINED) |
| 1007 | { |
996 | { |
| 1008 | // update FAT entry of last cluster |
997 | // update FAT entry of last cluster |
| Line 1024... | Line 1013... | ||
| 1024 | if(SD_SUCCESS != SDC_PutSector(file->SectorInCache, file->Cache)) // save the modified sector to the FAT. |
1013 | if(SD_SUCCESS != SDC_PutSector(file->SectorInCache, file->Cache)) // save the modified sector to the FAT. |
| 1025 | { |
1014 | { |
| 1026 | Fat16_Deinit(); |
1015 | Fat16_Deinit(); |
| 1027 | return(0); |
1016 | return(0); |
| 1028 | } |
1017 | } |
| 1029 | // now the new cluster appended to the fat is the last cluster |
- | |
| 1030 | file->FirstSectorOfLastCluster = Fat16ClusterToSector(new_cluster); |
- | |
| 1031 | } |
1018 | } |
| 1032 | else // last cluster of the file is undefined |
1019 | else // last cluster of the file is undefined |
| 1033 | { // then the new cluster must be the first one of the file |
1020 | { // then the new cluster must be the first one of the file |
| 1034 | // and its cluster number must be set in the direntry |
1021 | // and its cluster number must be set in the direntry |
| 1035 | DirEntry_t * dir; |
1022 | DirEntry_t * dir; |
| Line 1054... | Line 1041... | ||
| 1054 | Fat16_Deinit(); |
1041 | Fat16_Deinit(); |
| 1055 | return(CLUSTER_UNDEFINED); |
1042 | return(CLUSTER_UNDEFINED); |
| 1056 | } |
1043 | } |
| 1057 | // update file info |
1044 | // update file info |
| 1058 | file->FirstSectorOfFirstCluster = Fat16ClusterToSector(new_cluster); |
1045 | file->FirstSectorOfFirstCluster = Fat16ClusterToSector(new_cluster); |
| 1059 | file->FirstSectorOfLastCluster = file->FirstSectorOfFirstCluster; |
- | |
| 1060 | file->Size = 0; |
1046 | file->Size = 0; |
| 1061 | file->Position = 0; |
1047 | file->Position = 0; |
| 1062 | } |
1048 | } |
| 1063 | // update file pointes |
1049 | // update file pointes |
| 1064 | file->FirstSectorOfCurrCluster = Fat16ClusterToSector(new_cluster); |
1050 | file->FirstSectorOfCurrCluster = Fat16ClusterToSector(new_cluster); |
| Line 1816... | Line 1802... | ||
| 1816 | 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. |
1802 | 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. |
| 1817 | file->Position++; // the actual positon within the file. |
1803 | file->Position++; // the actual positon within the file. |
| 1818 | file->ByteOfCurrSector++; // goto next byte in sector |
1804 | file->ByteOfCurrSector++; // goto next byte in sector |
| 1819 | if(file->ByteOfCurrSector >= BYTES_PER_SECTOR) // if the end of this sector is reached yet |
1805 | if(file->ByteOfCurrSector >= BYTES_PER_SECTOR) // if the end of this sector is reached yet |
| 1820 | { // save the sector to the sd-card |
1806 | { // save the sector to the sd-card |
| - | 1807 | ||
| 1821 | if(SD_SUCCESS != SDC_PutSector(file->SectorInCache, file->Cache)) |
1808 | if(SD_SUCCESS != SDC_PutSector(file->SectorInCache, file->Cache)) |
| 1822 | { |
1809 | { |
| 1823 | Fat16_Deinit(); |
1810 | Fat16_Deinit(); |
| 1824 | return(EOF); |
1811 | return(EOF); |
| 1825 | } |
1812 | } |