SDIO

https://community.st.com/t5/stm32-mcus-products/stm32cubemx-sdio-f4/td-p/410536

Project STM32F413H_DISCOVERY FatFs_uSD_RTOS

stm32f413h_discovery_sd.c

uint8_t BSP_SD_Init(void)
{ 
  uint8_t sd_state = MSD_OK;
  
  /* uSD device interface configuration */
  uSdHandle.Instance = SDIO;

  uSdHandle.Init.ClockEdge           = SDIO_CLOCK_EDGE_RISING;
  uSdHandle.Init.ClockBypass         = SDIO_CLOCK_BYPASS_DISABLE;
  uSdHandle.Init.ClockPowerSave      = SDIO_CLOCK_POWER_SAVE_DISABLE;
  uSdHandle.Init.BusWide             = SDIO_BUS_WIDE_1B;
  uSdHandle.Init.HardwareFlowControl = SDIO_HARDWARE_FLOW_CONTROL_ENABLE;
  uSdHandle.Init.ClockDiv            = SDIO_TRANSFER_CLK_DIV;
  
  /* Msp SD Detect pin initialization */
  BSP_SD_Detect_MspInit(&uSdHandle, NULL);
  
  /* Check if SD card is present */
  if(BSP_SD_IsDetected() != SD_PRESENT)
  {
    return MSD_ERROR_SD_NOT_PRESENT;
  }
  
  /* Msp SD initialization */
  BSP_SD_MspInit(&uSdHandle, NULL);

  /* HAL SD initialization */
  if(HAL_SD_Init(&uSdHandle) != HAL_OK)
  {
    sd_state = MSD_ERROR;
  }
  
  /* Configure SD Bus width */
  if(sd_state == MSD_OK)
  {
    /* Enable wide operation */
    if(HAL_SD_ConfigWideBusOperation(&uSdHandle, SDIO_BUS_WIDE_4B) != HAL_OK)
    {
      sd_state = MSD_ERROR;
    }
    else
    {
      sd_state = MSD_OK;
    }
  }
  
  return  sd_state;
}

/**
  * @brief  Initializes the SD MSP.
  * @param  hsd: SD handle
  * @param  Params : pointer on additional configuration parameters, can be NULL.
  */
__weak void BSP_SD_MspInit(SD_HandleTypeDef *hsd, void *Params)
{
  static DMA_HandleTypeDef dma_rx_handle;
  static DMA_HandleTypeDef dma_tx_handle;
  GPIO_InitTypeDef gpio_init_structure;

  /* Prevent unused argument(s) compilation warning */
  UNUSED(Params);

  /* Enable SDIO clock */
  __HAL_RCC_SDIO_CLK_ENABLE();
  
  /* Enable DMA2 clocks */
  __DMAx_TxRx_CLK_ENABLE();

  /* Enable GPIOs clock */
  __HAL_RCC_GPIOC_CLK_ENABLE();
  __HAL_RCC_GPIOA_CLK_ENABLE();
  
  /* Common GPIO configuration */
  gpio_init_structure.Mode      = GPIO_MODE_AF_PP;
  gpio_init_structure.Pull      = GPIO_PULLUP;
  gpio_init_structure.Speed     = GPIO_SPEED_HIGH;
  gpio_init_structure.Alternate = GPIO_AF12_SDIO;
  
  /* GPIOC configuration: SD_D[0..3] and SD_clk */
  gpio_init_structure.Pin = GPIO_PIN_8 | GPIO_PIN_9 | GPIO_PIN_10 | GPIO_PIN_11 | GPIO_PIN_12;
   
  HAL_GPIO_Init(GPIOC, &gpio_init_structure);

  /* GPIOA configuration: SD cmd */
  gpio_init_structure.Pin = GPIO_PIN_6;
  HAL_GPIO_Init(GPIOA, &gpio_init_structure);

  /* NVIC configuration for SDIO interrupts */
  HAL_NVIC_SetPriority(SDIO_IRQn, 0x0E, 0x00);
  HAL_NVIC_EnableIRQ(SDIO_IRQn);
    
  /* Configure DMA Rx parameters */
  dma_rx_handle.Init.Channel             = SD_DMAx_Rx_CHANNEL;
  dma_rx_handle.Init.Direction           = DMA_PERIPH_TO_MEMORY;
  dma_rx_handle.Init.PeriphInc           = DMA_PINC_DISABLE;
  dma_rx_handle.Init.MemInc              = DMA_MINC_ENABLE;
  dma_rx_handle.Init.PeriphDataAlignment = DMA_PDATAALIGN_WORD;
  dma_rx_handle.Init.MemDataAlignment    = DMA_MDATAALIGN_WORD;
  dma_rx_handle.Init.Mode                = DMA_PFCTRL;
  dma_rx_handle.Init.Priority            = DMA_PRIORITY_VERY_HIGH;
  dma_rx_handle.Init.FIFOMode            = DMA_FIFOMODE_ENABLE;
  dma_rx_handle.Init.FIFOThreshold       = DMA_FIFO_THRESHOLD_FULL;
  dma_rx_handle.Init.MemBurst            = DMA_MBURST_INC4;
  dma_rx_handle.Init.PeriphBurst         = DMA_PBURST_INC4;
  
  dma_rx_handle.Instance = SD_DMAx_Rx_STREAM;
  
  /* Associate the DMA handle */
  __HAL_LINKDMA(hsd, hdmarx, dma_rx_handle);
  
  /* Deinitialize the stream for new transfer */
  HAL_DMA_DeInit(&dma_rx_handle);
  
  /* Configure the DMA stream */
  HAL_DMA_Init(&dma_rx_handle);
  
  /* Configure DMA Tx parameters */
  dma_tx_handle.Init.Channel             = SD_DMAx_Tx_CHANNEL;
  dma_tx_handle.Init.Direction           = DMA_MEMORY_TO_PERIPH;
  dma_tx_handle.Init.PeriphInc           = DMA_PINC_DISABLE;
  dma_tx_handle.Init.MemInc              = DMA_MINC_ENABLE;
  dma_tx_handle.Init.PeriphDataAlignment = DMA_PDATAALIGN_WORD;
  dma_tx_handle.Init.MemDataAlignment    = DMA_MDATAALIGN_WORD;
  dma_tx_handle.Init.Mode                = DMA_PFCTRL;
  dma_tx_handle.Init.Priority            = DMA_PRIORITY_VERY_HIGH;
  dma_tx_handle.Init.FIFOMode            = DMA_FIFOMODE_ENABLE;
  dma_tx_handle.Init.FIFOThreshold       = DMA_FIFO_THRESHOLD_FULL;
  dma_tx_handle.Init.MemBurst            = DMA_MBURST_INC4;
  dma_tx_handle.Init.PeriphBurst         = DMA_PBURST_INC4;
  
  dma_tx_handle.Instance = SD_DMAx_Tx_STREAM;
  
  /* Associate the DMA handle */
  __HAL_LINKDMA(hsd, hdmatx, dma_tx_handle);
  
  /* Deinitialize the stream for new transfer */
  HAL_DMA_DeInit(&dma_tx_handle);
  
  /* Configure the DMA stream */
  HAL_DMA_Init(&dma_tx_handle); 
  
  /* NVIC configuration for DMA transfer complete interrupt */
  HAL_NVIC_SetPriority(SD_DMAx_Rx_IRQn, 0x0F, 0x00);
  HAL_NVIC_EnableIRQ(SD_DMAx_Rx_IRQn);
  
  /* NVIC configuration for DMA transfer complete interrupt */
  HAL_NVIC_SetPriority(SD_DMAx_Tx_IRQn, 0x0F, 0x00);
  HAL_NVIC_EnableIRQ(SD_DMAx_Tx_IRQn);
}