修复STM32F4xxx STMCubeMX固件V1.18 SDIO FATFS DMA不工作怎么解决？

发表于 2018 年 1 月 2 日 12:18

  大家好，

  最近使用STM32CubeMX Ver 4.0（STMCube V1.0），固件V1.18为STM32F407生成代码，使用SDIO 4位总线通过DMA或标准IO访问SD卡。生成的代码可能无法运行。

  为了使其工作，您必须修改 STM32CubeMX 生成的三个文件：

  1. bsp_driver_sd.c

  2. sd_diskio.c

  3.fatfs.c

  以下是程序：

  1.

  bsp_driver_sd.c

  修改

  BSP_SD_WriteBlocks() 和

  BSP_SD_ReadBlocks_DMA() 支持 DMA 或标准 I/O：

  

• // A flag indicating if to use DMA for read/write
• uint8_t BSP_SD_Ext_UseDMA = 1;
• /*==========================================================================
• Description
• DMA or polling mode of Reads block(s) from a specified address in an SD card
• * @param pData: Pointer to the buffer that will contain the data to transmit
• * @param ReadAddr: Address from where data is to be read
• * @param NumOfBlocks: Number of SD blocks to read
• * @param Timeout: Timeout for read operation
• * @retval SD status
• ---------------------------------------------------------------------------*/
• uint8_t BSP_SD_ReadBlocks(uint32_t *pData, uint32_t ReadAddr, uint32_t NumOfBlocks, uint32_t Timeout)
• {
• HAL_SD_StateTypeDef state_return;
• uint32_t timeout = 0;
• if (BSP_SD_Ext_UseDMA == 0) {
• if (HAL_SD_ReadBlocks(&hsd, (uint8_t *)pData, ReadAddr, NumOfBlocks, Timeout) != HAL_OK)
• return MSD_ERROR;
• } else {
• // Read block(s) in DMA transfer mode
• if (HAL_SD_ReadBlocks_DMA(&hsd, (uint8_t*) pData, ReadAddr, NumOfBlocks) != HAL_OK)
• return MSD_ERROR;
• // Wait until the SDIO/SDMMC and DMA finish the read/write
• timeout = 0;
• do {
• state_return = HAL_SD_GetState(&hsd);
• timeout++;
• } while((state_return == HAL_SD_STATE_BUSY) && (timeout < SD_DATATIMEOUT));
• if (HAL_SD_STATE_READY != state_return)
• return MSD_ERROR;
• }
• return MSD_OK;
• }
• /*==========================================================================
• Description
• DMA or polling mode of Write block(s) to a specified address in an SD card
• * @param pData: Pointer to the buffer that will contain the data to transmit
• * @param WriteAddr: Address from where data is to be written
• * @param NumOfBlocks: Number of SD blocks to write
• * @param Timeout: Timeout for write operation
• * @retval SD status
• ---------------------------------------------------------------------------*/
• uint8_t BSP_SD_WriteBlocks(uint32_t *pData, uint32_t WriteAddr, uint32_t NumOfBlocks, uint32_t Timeout)
• {
• HAL_SD_StateTypeDef state_return;
• uint32_t timeout = 0;
• if(BSP_SD_Ext_UseDMA == 0) {
• if (HAL_SD_WriteBlocks(&hsd, (uint8_t *)pData, WriteAddr, NumOfBlocks, Timeout) != HAL_OK)
• return MSD_ERROR;
• } else {
• // Read block(s) in DMA transfer mode
• if (HAL_SD_WriteBlocks_DMA(&hsd, (uint8_t*) pData, WriteAddr, NumOfBlocks) != HAL_OK)
• return MSD_ERROR;
• // Wait until the SDIO/SDMMC and DMA finish the read/write
• timeout = 0;
• do {
• state_return = HAL_SD_GetState(&hsd);
• timeout++;
• }
• while((state_return == HAL_SD_STATE_BUSY) && (timeout < SD_DATATIMEOUT));
• if (HAL_SD_STATE_READY != state_return)
• return MSD_ERROR;
• }
• return MSD_OK;
• }‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍
  

  2. sd_diskio.c

  i) 修复缺少的 SDIO 初始化代码

  原始生成代码：

  

• DSTATUS SD_initialize(BYTE lun)
• {
• return SD_CheckStatus(lun);
• }‍‍‍‍
  

  应该修改（我不知道

  为什么 BSP_SD_Init() 不见了！
):
  

• DSTATUS SD_initialize(BYTE lun)
• {
• Stat = STA_NOINIT;
• if (BSP_SD_Init() == MSD_OK)
• Stat = SD_CheckStatus(lun);
• return Stat;
• }‍‍‍‍‍‍‍‍‍
  

  否则，它无法通过 HAL_SD_Init() 初始化 SDIO！

  ii) 修改SD_read()和SD_write：

  

• DRESULT SD_read(BYTE lun, BYTE *buff, DWORD sector, UINT count)
• {
• DRESULT res = RES_ERROR;
• if (BSP_SD_ReadBlocks((uint32_t*)buff,
• (uint32_t) (sector),
• count,
• SDMMC_DATATIMEOUT) == MSD_OK) {
• // wait until the read operation is finished
• while (BSP_SD_GetCardState()!= MSD_OK);
• res = RES_OK;
• }
• return res;
• }
• DRESULT SD_write(BYTE lun, const BYTE *buff, DWORD sector, UINT count)
• {
• DRESULT res = RES_ERROR;
• if (BSP_SD_WriteBlocks((uint32_t*)buff,
• (uint32_t)(sector),
• count,
• SDMMC_DATATIMEOUT) == MSD_OK) {
• // wait until the Write operation is finished
• while (BSP_SD_GetCardState() != MSD_OK);
• res = RES_OK;
• }
• return res;
• }
• ‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍
  

  3.

  fatfs.c

  添加挂载程序挂载SD卡文件系统

  原始生成代码：

  

• void MX_FATFS_Init(void)
• {
• /*## FatFS: Link the SD driver ###########################*/
• retSD = FATFS_LinkDriver(&SD_Driver, SDPath);
• /* USER CODE BEGIN Init */
• /* additional user code for init */
• /* USER CODE END Init */
• }‍‍‍‍‍‍‍‍‍‍
  

  修改后的代码：

  

• void MX_FATFS_Init(void)
• {
• /*## FatFS: Link the SD driver ###########################*/
• retSD = FATFS_LinkDriver(&SD_Driver, SDPath);
• /* USER CODE BEGIN Init */
• /* additional user code for init */
• if (retSD != 0)
• Error_Handler();
• if (f_mount(&SDFatFS, (TCHAR const*)SDPath, 0) != FR_OK)
• Error_Handler();
• /* USER CODE END Init */
• }‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍
  

  最后，我们可以编写代码来测试 FATFS：

  

• void SDFileTest(void)
• {
• FIL MyFile;
• FRESULT res; /* FatFs function common result code */
• uint32_t byteswritten, bytesread; /* File write/read counts */
• uint8_t wtext[] = 'Hello, STM32F4 FatFs!'; /* File write buffer */
• uint8_t rtext[100]; /* File read buffer */
• printf('SD File createn');
• // Create file test
• if (f_open(&MyFile, 'STMTXT', FA_CREATE_ALWAYS | FA_WRITE) != FR_OK)
• Error_Handler();
• res = f_write(&MyFile, wtext, sizeof(wtext), (void *)&byteswritten);
• if ((byteswritten == 0) || (res != FR_OK))
• Error_Handler();
• f_close(&MyFile);
• printf('done!n');
• printf('SD File openn');
• // Read file test
• if (f_open(&MyFile, 'STMTXT', FA_READ) != FR_OK)
• Error_Handler();
• res = f_read(&MyFile, rtext, sizeof(rtext), (UINT*)&bytesread);
• if ((bytesread == 0) || (res != FR_OK))
• Error_Handler();
• f_close(&MyFile);
• if ((bytesread != byteswritten))
• Error_Handler();
• printf('done!n');
• }
• int main(void)
• {
• .
• .
• MX_DMA_Init();
• .
• .
• MX_SDIO_SD_Init();
• .
• .
• MX_FATFS_Init();
• .
• .
• SDFileTest();
• while (1);
• }
• ‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍‍