flipperzero-firmware/firmware/targets/f4/Src/fatfs/spi_sd_hal.c

125 lines
3.4 KiB
C
Raw Normal View History

#include "main.h"
#define SD_DUMMY_BYTE 0xFF
#define SD_CS_LOW() HAL_GPIO_WritePin(SD_CS_GPIO_Port, SD_CS_Pin, GPIO_PIN_RESET)
#define SD_CS_HIGH() HAL_GPIO_WritePin(SD_CS_GPIO_Port, SD_CS_Pin, GPIO_PIN_SET)
const uint32_t SpiTimeout = 1000;
extern SPI_HandleTypeDef SPI_SD_HANDLE;
uint8_t SD_IO_WriteByte(uint8_t Data);
/******************************************************************************
BUS OPERATIONS
*******************************************************************************/
/**
* @brief SPI error treatment function
* @retval None
*/
static void SPIx_Error(void) {
/* De-initialize the SPI communication BUS */
HAL_SPI_DeInit(&SPI_SD_HANDLE);
/* Re-Initiaize the SPI communication BUS */
HAL_SPI_Init(&SPI_SD_HANDLE);
}
/**
* @brief SPI Write byte(s) to device
* @param DataIn: Pointer to data buffer to write
* @param DataOut: Pointer to data buffer for read data
* @param DataLength: number of bytes to write
* @retval None
*/
static void SPIx_WriteReadData(const uint8_t* DataIn, uint8_t* DataOut, uint16_t DataLength) {
HAL_StatusTypeDef status = HAL_OK;
status =
HAL_SPI_TransmitReceive(&SPI_SD_HANDLE, (uint8_t*)DataIn, DataOut, DataLength, SpiTimeout);
/* Check the communication status */
if(status != HAL_OK) {
/* Execute user timeout callback */
SPIx_Error();
}
}
/**
* @brief SPI Write a byte to device
* @param Value: value to be written
* @retval None
*/
__attribute__((unused)) static void SPIx_Write(uint8_t Value) {
HAL_StatusTypeDef status = HAL_OK;
uint8_t data;
status = HAL_SPI_TransmitReceive(&SPI_SD_HANDLE, (uint8_t*)&Value, &data, 1, SpiTimeout);
/* Check the communication status */
if(status != HAL_OK) {
/* Execute user timeout callback */
SPIx_Error();
}
}
/******************************************************************************
LINK OPERATIONS
*******************************************************************************/
/********************************* LINK SD ************************************/
/**
* @brief Initialize the SD Card and put it into StandBy State (Ready for
* data transfer).
* @retval None
*/
void SD_IO_Init(void) {
uint8_t counter = 0;
/* SD chip select high */
SD_CS_HIGH();
/* Send dummy byte 0xFF, 10 times with CS high */
/* Rise CS and MOSI for 80 clocks cycles */
for(counter = 0; counter <= 200; counter++) {
/* Send dummy byte 0xFF */
SD_IO_WriteByte(SD_DUMMY_BYTE);
}
}
/**
* @brief Set SD interface Chip Select state
* @param val: 0 (low) or 1 (high) state
* @retval None
*/
void SD_IO_CSState(uint8_t val) {
if(val == 1) {
SD_CS_HIGH();
} else {
SD_CS_LOW();
}
}
/**
* @brief Write byte(s) on the SD
* @param DataIn: Pointer to data buffer to write
* @param DataOut: Pointer to data buffer for read data
* @param DataLength: number of bytes to write
* @retval None
*/
void SD_IO_WriteReadData(const uint8_t* DataIn, uint8_t* DataOut, uint16_t DataLength) {
/* Send the byte */
SPIx_WriteReadData(DataIn, DataOut, DataLength);
}
/**
* @brief Write a byte on the SD.
* @param Data: byte to send.
* @retval Data written
*/
uint8_t SD_IO_WriteByte(uint8_t Data) {
uint8_t tmp;
/* Send the byte */
SPIx_WriteReadData(&Data, &tmp, 1);
return tmp;
}