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| 1 | - | ||
| 2 | #include <avr/io.h> |
1 | #include <avr/io.h> |
| 3 | #include "fat16.h" |
- | |
| 4 | #include "ssc.h" |
2 | #include "ssc.h" |
| 5 | - | ||
| 6 | //________________________________________________________________________________________________________________________________________ |
- | |
| 7 | // Module name: fat16.c |
- | |
| 8 | // Compiler used: avr-gcc 3.4.5 |
- | |
| 9 | // Last Modifikation: 24.07.2007 |
- | |
| 10 | // Version: 1.03 |
- | |
| 11 | // Authors: Stephan Busker |
- | |
| 12 | // Description: Source files for access to the synchrnous serial channel. |
- | |
| 13 | // Copyright (C) 2007 Stephan Busker |
- | |
| 14 | //........................................................................................................................................ |
- | |
| 15 | // Functions: extern void SSC_Init(void); |
- | |
| 16 | // extern u8 SSC_GetChar (void); |
- | |
| 17 | // extern void SSC_PutChar (u8 Byte); |
- | |
| 18 | // extern void SSC_Disable(void); |
- | |
| 19 | // extern void SSC_Enable(void); |
- | |
| 20 | //........................................................................................................................................ |
- | |
| 21 | // ext. functions: extern u8 SDC_GetSector (u32,u8*); |
- | |
| 22 | // extern u8 SDC_PutSector (u32,u8*); |
- | |
| 23 | //........................................................................................................................................ |
- | |
| 24 | // |
- | |
| 25 | // URL: www.Mikro-Control.de |
- | |
| 26 | // mailto: stephan.busker@mikro-control.de |
- | |
| - | 3 | ||
| - | 4 | ||
| - | 5 | ||
| - | 6 | //-------------------------------------- Hardware specific definitions -------------------------------------- |
|
| - | 7 | #define PORTR_SPI PINB |
|
| - | 8 | #define PORTW_SPI PORTB //Port to which the sd-card is connected (SPI Port) |
|
| - | 9 | #define PORT_MISO PORTB6 //Port Pin that is connected to the DO of the MMC/SD-card |
|
| - | 10 | #define PORT_MOSI PORTB5 //Port Pin that is connected to DI of the MMC/SD-card |
|
| - | 11 | #define PORT_SCK PORTB7 //Port Pin that is connected the CLK of the MMC/SD-card |
|
| - | 12 | #define PORT_SS PORTB4 //Slave Select is not used in SPI Master Mode, but must be defined |
|
| - | 13 | #define PORT_CS PORTB4 //Port Pin that is connected to /CS of the MMC/SD-Karte |
|
| - | 14 | ||
| - | 15 | ||
| - | 16 | #ifdef USE_SDLOGGER |
|
| - | 17 | #define __SD_INTERFACE_INVERTED // the interface between the controller and the SD-card uses an inverting leveltranslator (transistorinverter) |
|
| - | 18 | #endif // and therefore the signals to or from the memorycard have to be inverted. |
|
| - | 19 | ||
| - | 20 | #ifdef USE_FOLLOWME // uses resitors, therefore its not inverted |
|
| - | 21 | //#define __SD_INTERFACE_INVERTED // the interface between the controller and the MMC/SD-card uses an inverting leveltranslator (transistorinverter) |
|
| - | 22 | #endif |
|
| - | 23 | ||
| - | 24 | #define DDR_SPI DDRB |
|
| - | 25 | #define DD_MISO DDB6 //Port Pin that is connected to the DO of the MMC/SD-card |
|
| - | 26 | #define DD_MOSI DDB5 //Port Pin that is connected to DI of the MMC/SD-card |
|
| - | 27 | #define DD_SCK DDB7 //Port Pin that is connected the CLK of the MMC/SD-card |
|
| - | 28 | #define DD_SS DDB4 //Slave Select is not used in SPI Master Mode, but must be defined |
|
| - | 29 | #define DD_CS DDB4 //Port Pin that is connected to /CS of the MMC/SD-Karte |
|
| - | 30 | ||
| - | 31 | // for compatibility reasons gcc3.x <-> gcc4.x |
|
| - | 32 | #ifndef SPCR |
|
| - | 33 | #define SPCR SPCR0 |
|
| - | 34 | #endif |
|
| - | 35 | #ifndef SPIE |
|
| - | 36 | #define SPIE SPIE0 |
|
| - | 37 | #endif |
|
| - | 38 | #ifndef SPE |
|
| - | 39 | #define SPE SPE0 |
|
| - | 40 | #endif |
|
| - | 41 | #ifndef DORD |
|
| - | 42 | #define DORD DORD0 |
|
| - | 43 | #endif |
|
| - | 44 | #ifndef MSTR |
|
| - | 45 | #define MSTR MSTR0 |
|
| - | 46 | #endif |
|
| - | 47 | #ifndef CPOL |
|
| - | 48 | #define CPOL CPOL0 |
|
| - | 49 | #endif |
|
| - | 50 | #ifndef CPHA |
|
| - | 51 | #define CPHA CPHA0 |
|
| - | 52 | #endif |
|
| - | 53 | #ifndef SPR1 |
|
| - | 54 | #define SPR1 SPR01 |
|
| - | 55 | #endif |
|
| - | 56 | #ifndef SPR0 |
|
| - | 57 | #define SPR0 SPR00 |
|
| - | 58 | #endif |
|
| - | 59 | ||
| - | 60 | #ifndef SPDR |
|
| - | 61 | #define SPDR SPDR0 |
|
| - | 62 | #endif |
|
| - | 63 | ||
| - | 64 | #ifndef SPSR |
|
| - | 65 | #define SPSR SPSR0 |
|
| - | 66 | #endif |
|
| - | 67 | #ifndef SPIF |
|
| - | 68 | #define SPIF SPIF0 |
|
| - | 69 | #endif |
|
| - | 70 | #ifndef WCOL |
|
| - | 71 | #define WCOL WCOL0 |
|
| - | 72 | #endif |
|
| 27 | //________________________________________________________________________________________________________________________________________ |
73 | #ifndef SPI2X |
| 28 | 74 | #define SPI2X SPI2X0 |
|
| 29 | 75 | #endif |
|
| 30 | 76 | ||
| 31 | 77 | ||
| 32 | //________________________________________________________________________________________________________________________________________ |
78 | //________________________________________________________________________________________________________________________________________ |
| 33 | // Funtion: SSC_Init(void); |
79 | // Funtion: SSC_Init(void); |
| 34 | // |
80 | // |
| 35 | // Description: This function initialises the synchronus serial channel to the sdcard. |
81 | // Description: This function initialises the synchronus serial channel to the sdcard. |
| 36 | // |
82 | // |
| 37 | // |
83 | // |
| 38 | // Returnvalue: none |
84 | // Returnvalue: none |
| 39 | //________________________________________________________________________________________________________________________________________ |
85 | //________________________________________________________________________________________________________________________________________ |
| 40 | 86 | ||
| 41 | void SSC_Init(void) |
87 | void SSC_Init(void) |
| 42 | { |
88 | { |
| 43 | MMC_Direction_REG &=~(1<<SPI_DI); // Set the direction of the ssc-port |
89 | // Set MOSI,SCK and CS as output |
| 44 | MMC_Direction_REG |= (1<<SPI_Clock); // _______ _______ |
- | |
| 45 | MMC_Direction_REG |= (1<<SPI_DO); // CS \________________________/ |
- | |
| 46 | MMC_Direction_REG |= (1<<MMC_Chip_Select); // |
90 | DDR_SPI |= (1<<DD_MOSI)|(1<<DD_SCK)|(1<<DD_CS); |
| 47 | MMC_Direction_REG |= (1<<SPI_SS); // ___ ___ ___ |
- | |
| 48 | // clk __________/ \___/ \___/ \_________ |
- | |
| 49 | // |
91 | // set MISO as input |
| 50 | SSC_Disable(); // ___ ___ |
92 | DDR_SPI &= ~(1<<DD_MISO); |
| 51 | // data_________/ \___________/ \___________ |
- | |
| 52 | 93 | ||
| 53 | // initialise ssc, clock = Idel low |
- | |
| 54 | // devide clock by 32 |
- | |
| 55 | SPCR = (1<<SPE)|(1<<MSTR)|(1<<SPR1)|(1<<CPOL); // Enable SSC in mastermode, invert clockpolarity (idle high) |
- | |
| 56 | SPSR = SPSR|(1<<SPI2X); |
94 | SSC_Disable(); |
| 57 | } |
- | |
| 58 | - | ||
| 59 | - | ||
| 60 | - | ||
| 61 | 95 | ||
| 62 | //________________________________________________________________________________________________________________________________________ |
- | |
| - | 96 | // 20MHz / 32 = 625 kHz |
|
| 63 | // Funtion: void SSC_ClearRxFifo(void); |
97 | #ifdef __SD_INTERFACE_INVERTED |
| 64 | // |
- | |
| 65 | // Description: Clears the fifo of the ssc if the controller used has a builtin fifo. |
98 | SPCR = (1<<SPE)|(1<<MSTR)|(0<<DORD)|(1<<CPOL)|(0<<CPHA)|(1<<SPR1)|(1<<SPR0); // Enable SSC in mastermode, inverted clockpolarity (idle high) |
| 66 | // |
99 | #else |
| - | 100 | SPCR = (1<<SPE)|(1<<MSTR)|(0<<DORD)|(0<<CPOL)|(0<<CPHA)|(1<<SPR1)|(1<<SPR0); // Enable SSC in mastermode, noninverted clockpolarity (idle low) |
|
| 67 | // |
101 | #endif |
| 68 | // Returnvalue: none |
102 | SPSR |= (1<<SPI2X); |
| 69 | //________________________________________________________________________________________________________________________________________ |
- | |
| - | 103 | ||
| - | 104 | // set port pin as input pullup for SD-Card switch |
|
| - | 105 | #ifdef USE_FOLLOWME |
|
| - | 106 | PORTB |= (1 << PORTB2); |
|
| - | 107 | DDRB &= ~(1 << DDB2); |
|
| 70 | 108 | #endif |
|
| - | 109 | ||
| - | 110 | #ifdef USE_SDLOGGER |
|
| 71 | 111 | PORTB |= (1 << PORTB3); |
|
| 72 | void SSC_ClearRxFifo(void) |
- | |
| 73 | { |
112 | DDRB &= ~(1 << DDB3); |
| - | 113 | #endif |
|
| - | 114 | } |
|
| - | 115 | ||
| 74 | // enter your code here to clear the rx-fifo of the ssc. |
116 | void SSC_Deinit(void) |
| 75 | } |
117 | { |
| 76 | 118 | ||
| 77 | 119 | } |
|
| 78 | 120 | ||
| 79 | //________________________________________________________________________________________________________________________________________ |
121 | //________________________________________________________________________________________________________________________________________ |
| 80 | // Funtion: SSC_GetChar(void); |
122 | // Function: SSC_GetChar(void); |
| 81 | // |
123 | // |
| 82 | // Description: This function reads one byte from the SSC |
124 | // Description: This function reads one byte from the SSC |
| 83 | // |
125 | // |
| 84 | // |
126 | // |
| 85 | // Returnvalue: the byte received. |
127 | // Returnvalue: the byte received. |
| 86 | //________________________________________________________________________________________________________________________________________ |
128 | //________________________________________________________________________________________________________________________________________ |
| 87 | 129 | ||
| 88 | u8 SSC_GetChar (void) |
130 | uint8_t SSC_GetChar (void) |
| 89 | { |
131 | { |
| 90 | u8 Byte = 0; |
- | |
| 91 | - | ||
| 92 | SPDR = 0x00; // read one byte of data from the SSC |
- | |
| 93 | while(!(SPSR & (1<<SPIF))){}; // wait until the data has been read. |
- | |
| 94 | Byte = SPDR; |
132 | uint8_t Byte = 0; |
| 95 | 133 | ||
| 96 | #ifdef __MMC_INTERFACE_INVERTED |
134 | #ifdef __SD_INTERFACE_INVERTED |
| 97 | return (~Byte); |
135 | SPDR = 0x00; // send dummy byte to initiate the reading |
| 98 | #else |
136 | #else |
| - | 137 | SPDR = 0xFF; // send dummy byte to initiate the reading |
|
| - | 138 | #endif |
|
| - | 139 | while(!(SPSR & (1<<SPIF))) |
|
| - | 140 | { |
|
| - | 141 | // wait until the data has been read. |
|
| - | 142 | } |
|
| - | 143 | Byte = SPDR; |
|
| - | 144 | ||
| - | 145 | #ifdef __SD_INTERFACE_INVERTED |
|
| 99 | return (Byte); // the byte received |
146 | Byte = ~Byte; |
| 100 | #endif |
147 | #endif |
| 101 | 148 | ||
| 102 | 149 | return(Byte); |
|
| 103 | } |
150 | } |
| 104 | 151 | ||
| 105 | 152 | ||
| 106 | //________________________________________________________________________________________________________________________________________ |
153 | //________________________________________________________________________________________________________________________________________ |
| 107 | // Funtion: SSC_PutChar(u8 Byte); |
154 | // Function: SSC_PutChar(u8 Byte); |
| 108 | // |
155 | // |
| 109 | // Description: This function writes one byte to the SSC |
156 | // Description: This function writes one byte to the SSC |
| 110 | // |
157 | // |
| 111 | // |
158 | // |
| 112 | // Returnvalue: none |
159 | // Returnvalue: none |
| 113 | //________________________________________________________________________________________________________________________________________ |
160 | //________________________________________________________________________________________________________________________________________ |
| 114 | 161 | ||
| 115 | void SSC_PutChar (u8 Byte) |
162 | void SSC_PutChar (uint8_t Byte) |
| - | 163 | { |
|
| 116 | { |
164 | |
| 117 | #ifdef __MMC_INTERFACE_INVERTED |
165 | #ifdef __SD_INTERFACE_INVERTED |
| 118 | SPDR = ~Byte; // send one byte of data to the SSC |
166 | SPDR = ~Byte; // send one byte of data to the SSC |
| 119 | #else |
167 | #else |
| 120 | SPDR = Byte; // send one byte of data to the SSC |
168 | SPDR = Byte; // send one byte of data to the SSC |
| 121 | #endif |
169 | #endif |
| 122 | SPDR = ~Byte; // send one byte of data to the SSC |
- | |
| 123 | while(!(SPSR & (1<<SPIF))) // wait until data was send. |
170 | while(!(SPSR & (1<<SPIF))) |
| 124 | { |
171 | { |
| - | 172 | // wait until the data has been sent. |
|
| 125 | } |
173 | } |
| 126 | } |
174 | } |
| 127 | 175 | ||
| 128 | 176 | ||
| 129 | //________________________________________________________________________________________________________________________________________ |
177 | //________________________________________________________________________________________________________________________________________ |
| 130 | // Funtion: SSC_Disable(void); |
178 | // Function: SSC_Disable(void); |
| 131 | // |
179 | // |
| 132 | // Description: This function enables chipselect of the sdcard (active low) |
180 | // Description: This function enables chipselect of the sdcard (active low) |
| 133 | // |
181 | // |
| 134 | // |
182 | // |
| 135 | // Returnvalue: none |
183 | // Returnvalue: none |
| 136 | //________________________________________________________________________________________________________________________________________ |
184 | //________________________________________________________________________________________________________________________________________ |
| 137 | 185 | ||
| 138 | void SSC_Disable(void) |
186 | void SSC_Disable(void) |
| 139 | { |
187 | { |
| 140 | #ifdef __MMC_INTERFACE_INVERTED |
188 | #ifdef __SD_INTERFACE_INVERTED |
| 141 | MMC_Write &= ~(1<<MMC_Chip_Select); // disable chipselect of the sdcard (active low). |
189 | PORTW_SPI &= ~(1<<PORT_CS); // disable chipselect of the sdcard (active low). |
| 142 | #else |
190 | #else |
| 143 | MMC_Write |= (1<<MMC_Chip_Select); // enable chipselect of the sdcard (active low). |
191 | PORTW_SPI |= (1<<PORT_CS); // disable chipselect of the sdcard (active low). |
| 144 | #endif |
192 | #endif |
| 145 | } |
193 | } |
| 146 | 194 | ||
| 147 | 195 | ||
| 148 | 196 | ||
| 149 | 197 | ||
| 150 | //________________________________________________________________________________________________________________________________________ |
198 | //________________________________________________________________________________________________________________________________________ |
| 151 | // Funtion: SSC_Enable(void); |
199 | // Function: SSC_Enable(void); |
| 152 | // |
200 | // |
| 153 | // Description: This function disables chipselect of the sdcard (active low) |
201 | // Description: This function disables chipselect of the sdcard (active low) |
| 154 | // |
202 | // |
| 155 | // |
203 | // |
| 156 | // Returnvalue: none |
204 | // Returnvalue: none |
| 157 | //________________________________________________________________________________________________________________________________________ |
205 | //________________________________________________________________________________________________________________________________________ |
| 158 | 206 | ||
| 159 | void SSC_Enable(void) |
207 | void SSC_Enable(void) |
| 160 | { |
208 | { |
| 161 | #ifdef __MMC_INTERFACE_INVERTED |
209 | #ifdef __SD_INTERFACE_INVERTED |
| 162 | MMC_Write |= (1<<MMC_Chip_Select); // enable chipselect of the sdcard (active low). |
210 | PORTW_SPI |= (1<<PORT_CS); // enable chipselect of the sdcard (active low). |
| 163 | #else |
211 | #else |
| 164 | MMC_Write &= ~(1<<MMC_Chip_Select); // disable chipselect of the sdcard (active low). |
212 | PORTW_SPI &= ~(1<<PORT_CS); // enable chipselect of the sdcard (active low). |
| 165 | #endif |
213 | #endif |
| 166 | } |
214 | } |
| - | 215 | ||
| 167 | 216 | ||
| 168 | 217 | ||