| 1,23 → 1,24 |
|---|
| |
| #include <avr/io.h> |
| #include "fat16.h" |
| #include "ssc.h" |
| |
| //________________________________________________________________________________________________________________________________________ |
| // Module name: fat16.c |
| // Module name: fat16.c |
| // Compiler used: avr-gcc 3.4.5 |
| // Last Modifikation: 24.07.2007 |
| // Version: 1.03 |
| // Authors: Stephan Busker |
| // Authors: Stephan Busker |
| // Description: Source files for access to the synchrnous serial channel. |
| // Copyright (C) 2007 Stephan Busker |
| //........................................................................................................................................ |
| // Functions: extern void SSC_Init(void); |
| // Functions: extern void SSC_Init(void); |
| // extern u8 SSC_GetChar (void); |
| // extern void SSC_PutChar (u8 Byte); |
| // extern void SSC_Disable(void); |
| // extern void SSC_Enable(void); |
| // extern void SSC_Disable(void); |
| // extern void SSC_Enable(void); |
| //........................................................................................................................................ |
| // ext. functions: extern u8 SDC_GetSector (u32,u8*); |
| // ext. functions: extern u8 SDC_GetSector (u32,u8*); |
| // extern u8 SDC_PutSector (u32,u8*); |
| //........................................................................................................................................ |
| // |
| 30,10 → 31,10 |
|---|
| |
| //________________________________________________________________________________________________________________________________________ |
| // Funtion: SSC_Init(void); |
| // |
| // Description: This function initialises the synchronus serial channel to the sdcard. |
| // |
| // |
| // Description: This function initialises the synchronus serial channel to the sdcard. |
| // |
| // |
| // Returnvalue: none |
| //________________________________________________________________________________________________________________________________________ |
| |
| 42,7 → 43,7 |
|---|
| MMC_Direction_REG &=~(1<<SPI_DI); // Set the direction of the ssc-port |
| MMC_Direction_REG |= (1<<SPI_Clock); // _______ _______ |
| MMC_Direction_REG |= (1<<SPI_DO); // CS \________________________/ |
| MMC_Direction_REG |= (1<<MMC_Chip_Select); // |
| MMC_Direction_REG |= (1<<MMC_Chip_Select); // |
| MMC_Direction_REG |= (1<<SPI_SS); // ___ ___ ___ |
| // clk __________/ \___/ \___/ \_________ |
| // |
| 51,7 → 52,7 |
|---|
| |
| // initialise ssc, clock = Idel low |
| // devide clock by 32 |
| SPCR = (1<<SPE)|(1<<MSTR)|(1<<SPR1)|(1<<CPOL); // Enable SSC in mastermode, invert clockpolarity (idle high) |
| SPCR = (1<<SPE)|(1<<MSTR)|(1<<SPR1)|(1<<CPOL); // Enable SSC in mastermode, invert clockpolarity (idle high) |
| SPSR = SPSR|(1<<SPI2X); |
| } |
| |
| 60,10 → 61,10 |
|---|
| |
| //________________________________________________________________________________________________________________________________________ |
| // Funtion: void SSC_ClearRxFifo(void); |
| // |
| // |
| // Description: Clears the fifo of the ssc if the controller used has a builtin fifo. |
| // |
| // |
| // |
| // Returnvalue: none |
| //________________________________________________________________________________________________________________________________________ |
| |
| 70,7 → 71,7 |
|---|
| |
| void SSC_ClearRxFifo(void) |
| { |
| // enter your code here to clear the rx-fifo of the ssc. |
| // enter your code here to clear the rx-fifo of the ssc. |
| } |
| |
| |
| 77,10 → 78,10 |
|---|
| |
| //________________________________________________________________________________________________________________________________________ |
| // Funtion: SSC_GetChar(void); |
| // |
| // |
| // Description: This function reads one byte from the SSC |
| // |
| // |
| // |
| // Returnvalue: the byte received. |
| //________________________________________________________________________________________________________________________________________ |
| |
| 93,21 → 94,21 |
|---|
| Byte = SPDR; |
| |
| #ifdef __MMC_INTERFACE_INVERTED |
| return (~Byte); |
| return (~Byte); |
| #else |
| return (Byte); // the byte received |
| return (Byte); // the byte received |
| #endif |
| |
| |
| |
| } |
| |
| |
| //________________________________________________________________________________________________________________________________________ |
| // Funtion: SSC_PutChar(u8 Byte); |
| // |
| // Description: This function writes one byte to the SSC |
| // |
| // |
| // Description: This function writes one byte to the SSC |
| // |
| // |
| // Returnvalue: none |
| //________________________________________________________________________________________________________________________________________ |
| |
| 127,19 → 128,19 |
|---|
| |
| //________________________________________________________________________________________________________________________________________ |
| // Funtion: SSC_Disable(void); |
| // |
| // Description: This function enables chipselect of the sdcard (active low) |
| // |
| // |
| // Description: This function enables chipselect of the sdcard (active low) |
| // |
| // |
| // Returnvalue: none |
| //________________________________________________________________________________________________________________________________________ |
| |
| void SSC_Disable(void) |
| { |
| void SSC_Disable(void) |
| { |
| #ifdef __MMC_INTERFACE_INVERTED |
| MMC_Write &= ~(1<<MMC_Chip_Select); // disable chipselect of the sdcard (active low). |
| MMC_Write &= ~(1<<MMC_Chip_Select); // disable chipselect of the sdcard (active low). |
| #else |
| MMC_Write |= (1<<MMC_Chip_Select); // enable chipselect of the sdcard (active low). |
| MMC_Write |= (1<<MMC_Chip_Select); // enable chipselect of the sdcard (active low). |
| #endif |
| } |
| |
| 148,19 → 149,19 |
|---|
| |
| //________________________________________________________________________________________________________________________________________ |
| // Funtion: SSC_Enable(void); |
| // |
| // Description: This function disables chipselect of the sdcard (active low) |
| // |
| // |
| // Description: This function disables chipselect of the sdcard (active low) |
| // |
| // |
| // Returnvalue: none |
| //________________________________________________________________________________________________________________________________________ |
| |
| void SSC_Enable(void) |
| { |
| void SSC_Enable(void) |
| { |
| #ifdef __MMC_INTERFACE_INVERTED |
| MMC_Write |= (1<<MMC_Chip_Select); // enable chipselect of the sdcard (active low). |
| MMC_Write |= (1<<MMC_Chip_Select); // enable chipselect of the sdcard (active low). |
| #else |
| MMC_Write &= ~(1<<MMC_Chip_Select); // disable chipselect of the sdcard (active low). |
| MMC_Write &= ~(1<<MMC_Chip_Select); // disable chipselect of the sdcard (active low). |
| #endif |
| } |
| |