SDIO 发送CMD55 有时返回3 有时正确

wzhd2008

  */
static HAL_SD_ErrorTypedef SD_PowerON(SD_HandleTypeDef *hsd)
{
  SDIO_CmdInitTypeDef sdio_cmdinitstructure;
  __IO HAL_SD_ErrorTypedef errorstate = SD_OK;
  uint32_t response = 0, count = 0, validvoltage = 0;
  uint32_t sdtype = SD_STD_CAPACITY;

  /* Power ON Sequence -------------------------------------------------------*/
  /* Disable SDIO Clock */
  __HAL_SD_SDIO_DISABLE();

  /* Set Power State to ON */
  SDIO_PowerState_ON(hsd->Instance);

  /* 1ms: required power up waiting time before starting the SD initialization
     sequence */
  HAL_Delay(1);

  /* Enable SDIO Clock */
  __HAL_SD_SDIO_ENABLE();

  /* CMD0: GO_IDLE_STATE -----------------------------------------------------*/
  /* No CMD response required */
  sdio_cmdinitstructure.Argument         = 0;
  sdio_cmdinitstructure.CmdIndex         = SD_CMD_GO_IDLE_STATE;
  sdio_cmdinitstructure.Response         = SDIO_RESPONSE_NO;
  sdio_cmdinitstructure.WaitForInterrupt = SDIO_WAIT_NO;
  sdio_cmdinitstructure.CPSM             = SDIO_CPSM_ENABLE;
  SDIO_SendCommand(hsd->Instance, &sdio_cmdinitstructure);

  /* Check for error conditions */
  errorstate = SD_CmdError(hsd);

  if(errorstate != SD_OK)
  {
    /* CMD Response Timeout (wait for CMDSENT flag) */
                printf("CMD0 Response err :%d",errorstate);
    return errorstate;
  }

  /* CMD8: SEND_IF_COND ------------------------------------------------------*/
  /* Send CMD8 to verify SD card interface operating condition */
  /* Argument: - [31:12]: Reserved (shall be set to '0')
  - [11:8]: Supply Voltage (VHS) 0x1 (Range: 2.7-3.6 V)
  - [7:0]: Check Pattern (recommended 0xAA) */
  /* CMD Response: R7 */
  sdio_cmdinitstructure.Argument         = SD_CHECK_PATTERN;
  sdio_cmdinitstructure.CmdIndex         = SD_SDIO_SEND_IF_COND;
  sdio_cmdinitstructure.Response         = SDIO_RESPONSE_SHORT;
  SDIO_SendCommand(hsd->Instance, &sdio_cmdinitstructure);

  /* Check for error conditions */
  errorstate = SD_CmdResp7Error(hsd);

  if (errorstate == SD_OK)
  {
    /* SD Card 2.0 */
                printf("CMD8 Response err :%d",errorstate);
    hsd->CardType = STD_CAPACITY_SD_CARD_V2_0;
    sdtype        = SD_HIGH_CAPACITY;
  }

  /* Send CMD55 */
  sdio_cmdinitstructure.Argument         = 0;
  sdio_cmdinitstructure.CmdIndex         = SD_CMD_APP_CMD;
  SDIO_SendCommand(hsd->Instance, &sdio_cmdinitstructure);

  /* Check for error conditions */
  errorstate = SD_CmdResp1Error(hsd, SD_CMD_APP_CMD);
直接用正点原子的FATFS例程的代码，有时运行到此处返回的错误码是03，重新初始化SD也失败，甚至是把MCU软件复位后一直初始化失败；
有时SD卡初始化正确，新建文件、写文件正常。

正点原子

换个卡试试