各位大神：
小弟最近调试裸机版本的SD卡读写测试程序，发现在仿真的时候  时对时错，很不稳定。
数据报错的时候提示数据CRC错误。
各位大神有没有类似的经历或者经验介绍，期待各位的帮忙。
DMA读写方式，附部分源码
/**
  * @brief  Tests the SD card Single Blocks operations.
  * @param  None
  * @retval None
  */
void SD_SingleBlockTest(void)
{
  /*------------------- Block Read/Write --------------------------*/
  /* Fill the buffer to send */
  Fill_Buffer(Buffer_Block_Tx, BLOCK_SIZE, 0x320F);

  if (Status == SD_OK)
  {
    /* Write block of 512 bytes on address 0 */
    Status = SD_WriteBlock(Buffer_Block_Tx, 0x00, BLOCK_SIZE);
    /* Check if the Transfer is finished */
    Status = SD_WaitWriteOperation();
    while(SD_GetStatus() != SD_TRANSFER_OK);
  }

  if (Status == SD_OK)
  {
    /* Read block of 512 bytes from address 0 */
    Status = SD_ReadBlock(Buffer_Block_Rx, 0x00, BLOCK_SIZE);
    /* Check if the Transfer is finished */
    Status = SD_WaitReadOperation();
    while(SD_GetStatus() != SD_TRANSFER_OK);
  }

  /* Check the correctness of written data */
  if (Status == SD_OK)
  {
    TransferStatus1 = Buffercmp(Buffer_Block_Tx, Buffer_Block_Rx, BLOCK_SIZE);
  }

  if(TransferStatus1 == PASSED)
  {
    STM_EVAL_LEDOn(LED2);
  }
  else
  {
    STM_EVAL_LEDOff(LED2);
    STM_EVAL_LEDOn(LED4);   
  }
}