STM32 SD卡驱动程序

好的，我可以为您提供一份简单的STM32 SD卡驱动程序模板，您可以根据自己的需求进行修改。

首先，您需要在STM32 CubeMX中配置SD卡的引脚和时序，然后生成代码并导出到您的工程中。

接下来，您可以在您的工程中添加以下代码来初始化SD卡的相关参数：

/* SD卡句柄定义 */
SD_HandleTypeDef hsd;

/* SD卡初始化函数 */
void MX_SDIO_SD_Init(void)
{
  /* 初始化SD卡时钟 */
  __HAL_RCC_SDIO_CLK_ENABLE();

  /* 初始化DMA时钟 */
  __HAL_RCC_DMA2_CLK_ENABLE();

  /* 初始化SDIO GPIO引脚 */
  GPIO_InitTypeDef GPIO_InitStruct = {0};
  GPIO_InitStruct.Pin = GPIO_PIN_8|GPIO_PIN_9|GPIO_PIN_10|GPIO_PIN_11|GPIO_PIN_12;
  GPIO_InitStruct.Mode = GPIO_MODE_AF_PP;
  GPIO_InitStruct.Pull = GPIO_PULLUP;
  GPIO_InitStruct.Speed = GPIO_SPEED_FREQ_VERY_HIGH;
  GPIO_InitStruct.Alternate = GPIO_AF12_SDIO;
  HAL_GPIO_Init(GPIOC, &GPIO_InitStruct);

  /* 初始化DMA配置 */
  hdma_sdio_rx.Instance = DMA2_Stream3;
  hdma_sdio_rx.Init.Channel = DMA_CHANNEL_4;
  hdma_sdio_rx.Init.Direction = DMA_PERIPH_TO_MEMORY;
  hdma_sdio_rx.Init.PeriphInc = DMA_PINC_DISABLE;
  hdma_sdio_rx.Init.MemInc = DMA_MINC_ENABLE;
  hdma_sdio_rx.Init.PeriphDataAlignment = DMA_PDATAALIGN_WORD;
  hdma_sdio_rx.Init.MemDataAlignment = DMA_MDATAALIGN_WORD;
  hdma_sdio_rx.Init.Mode = DMA_PFCTRL;
  hdma_sdio_rx.Init.Priority = DMA_PRIORITY_VERY_HIGH;
  hdma_sdio_rx.Init.FIFOMode = DMA_FIFOMODE_ENABLE;
  hdma_sdio_rx.Init.FIFOThreshold = DMA_FIFO_THRESHOLD_FULL;
  hdma_sdio_rx.Init.MemBurst = DMA_MBURST_INC4;
  hdma_sdio_rx.Init.PeriphBurst = DMA_PBURST_INC4;
  HAL_DMA_Init(&hdma_sdio_rx);

  /* 初始化SDIO配置 */
  hsd.Instance = SDIO;
  hsd.Init.ClockEdge = SDIO_CLOCK_EDGE_RISING;
  hsd.Init.ClockBypass = SDIO_CLOCK_BYPASS_DISABLE;
  hsd.Init.ClockPowerSave = SDIO_CLOCK_POWER_SAVE_DISABLE;
  hsd.Init.BusWide = SDIO_BUS_WIDE_1B;
  hsd.Init.HardwareFlowControl = SDIO_HARDWARE_FLOW_CONTROL_DISABLE;
  hsd.Init.ClockDiv = 0;
  HAL_SD_Init(&hsd, &SDCardInfo);

  /* 初始化SD卡信息 */
  HAL_SD_ConfigWideBusOperation(&hsd, SDIO_BUS_WIDE_4B);
  HAL_SD_GetCardCID(&hsd, &SDCardInfo.CID);
  HAL_SD_GetCardCSD(&hsd, &SDCardInfo.CSD);
  HAL_SD_GetCardStatus(&hsd, &SDCardInfo.CardStatus);
  HAL_SD_GetCardInfo(&hsd, &SDCardInfo);
}

接着，您可以添加以下代码来读写SD卡：

/* SD卡读取函数 */
uint8_t SD_ReadBlocks(uint32_t *pData, uint32_t BlockAdd, uint32_t NumberOfBlocks)
{
  if(HAL_SD_ReadBlocks_DMA(&hsd, (uint8_t *)pData, BlockAdd, NumberOfBlocks) != HAL_OK)
  {
    return 1;
  }
  if(HAL_SD_CheckReadOperation(&hsd, (uint32_t)SD_DATATIMEOUT) != HAL_OK)
  {
    return 2;
  }
  return 0;
}

/* SD卡写入函数 */
uint8_t SD_WriteBlocks(uint32_t *pData, uint32_t BlockAdd, uint32_t NumberOfBlocks)
{
  if(HAL_SD_WriteBlocks_DMA(&hsd, (uint8_t *)pData, BlockAdd, NumberOfBlocks) != HAL_OK)
  {
    return 1;
  }
  if(HAL_SD_CheckWriteOperation(&hsd, (uint32_t)SD_DATATIMEOUT) != HAL_OK)
  {
    return 2;
  }
  return 0;
}

以上是一个简单的SD卡驱动程序模板，您可以根据自己的需求进行修改。需要注意的是，在使用SD卡之前，您需要先对SD卡进行初始化。