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发布一个在读写sd卡时，此时sd卡拔出造成死机的处理方法，同时也在此记录一下，以备后用及有需要人们参考 。
stm32f4xx_hal_sd.c
红色的代码是增加上去的
函数名称： static HAL_SD_ErrorTypedef SD_CmdResp1Error(SD_HandleTypeDef *hsd, uint8_t SD_CMD)
/**
* @brief Checks for error conditions for R1 response.
* @param hsd: SD handle
* @param SD_CMD: The sent command index
* @retval SD Card error state
*/
static HAL_SD_ErrorTypedef SD_CmdResp1Error(SD_HandleTypeDef *hsd, uint8_t SD_CMD)
{
HAL_SD_ErrorTypedef errorstate = SD_OK;
uint32_t response_r1;
uint32_t cc = 0;
while(!__HAL_SD_SDIO_GET_FLAG(hsd, SDIO_FLAG_CCRCFAIL | SDIO_FLAG_CMDREND | SDIO_FLAG_CTIMEOUT))
{
if(++cc > 0x1ffff) // 自己加上去的，防止sd卡拔出后在此死循环造成死机
break;
}
if(cc >= 0x1ffff)
{
printf("\r\n获取 SD 状态错误/超时，退出 ... "); // sd卡错误或者sd卡拔出
return SD_DATA_TIMEOUT;
}
if(__HAL_SD_SDIO_GET_FLAG(hsd, SDIO_FLAG_CTIMEOUT))
{
errorstate = SD_CMD_RSP_TIMEOUT;
__HAL_SD_SDIO_CLEAR_FLAG(hsd, SDIO_FLAG_CTIMEOUT);
return errorstate;
}
else if(__HAL_SD_SDIO_GET_FLAG(hsd, SDIO_FLAG_CCRCFAIL))
{
errorstate = SD_CMD_CRC_FAIL;
__HAL_SD_SDIO_CLEAR_FLAG(hsd, SDIO_FLAG_CCRCFAIL);
return errorstate;
}
/* Check response received is of desired command */
if(SDIO_GetCommandResponse(hsd->Instance) != SD_CMD)
{
errorstate = SD_ILLEGAL_CMD;
return errorstate;
}
/* Clear all the static flags */
__HAL_SD_SDIO_CLEAR_FLAG(hsd, SDIO_STATIC_FLAGS);
/* We have received response, retrieve it for analysis */
response_r1 = SDIO_GetResponse(SDIO_RESP1);
if((response_r1 & SD_OCR_ERRORBITS) == SD_ALLZERO)
{
return errorstate;
}
if((response_r1 & SD_OCR_ADDR_OUT_OF_RANGE) == SD_OCR_ADDR_OUT_OF_RANGE)
{
return(SD_ADDR_OUT_OF_RANGE);
}
if((response_r1 & SD_OCR_ADDR_MISALIGNED) == SD_OCR_ADDR_MISALIGNED)
{
return(SD_ADDR_MISALIGNED);
}
if((response_r1 & SD_OCR_BLOCK_LEN_ERR) == SD_OCR_BLOCK_LEN_ERR)
{
return(SD_BLOCK_LEN_ERR);
}
if((response_r1 & SD_OCR_ERASE_SEQ_ERR) == SD_OCR_ERASE_SEQ_ERR)
{
return(SD_ERASE_SEQ_ERR);
}
if((response_r1 & SD_OCR_BAD_ERASE_PARAM) == SD_OCR_BAD_ERASE_PARAM)
{
return(SD_BAD_ERASE_PARAM);
}
if((response_r1 & SD_OCR_WRITE_PROT_VIOLATION) == SD_OCR_WRITE_PROT_VIOLATION)
{
return(SD_WRITE_PROT_VIOLATION);
}
if((response_r1 & SD_OCR_LOCK_UNLOCK_FAILED) == SD_OCR_LOCK_UNLOCK_FAILED)
{
return(SD_LOCK_UNLOCK_FAILED);
}
if((response_r1 & SD_OCR_COM_CRC_FAILED) == SD_OCR_COM_CRC_FAILED)
{
return(SD_COM_CRC_FAILED);
}
if((response_r1 & SD_OCR_ILLEGAL_CMD) == SD_OCR_ILLEGAL_CMD)
{
return(SD_ILLEGAL_CMD);
}
if((response_r1 & SD_OCR_CARD_ECC_FAILED) == SD_OCR_CARD_ECC_FAILED)
{
return(SD_CARD_ECC_FAILED);
}
if((response_r1 & SD_OCR_CC_ERROR) == SD_OCR_CC_ERROR)
{
return(SD_CC_ERROR);
}
if((response_r1 & SD_OCR_GENERAL_UNKNOWN_ERROR) == SD_OCR_GENERAL_UNKNOWN_ERROR)
{
return(SD_GENERAL_UNKNOWN_ERROR);
}
if((response_r1 & SD_OCR_STREAM_READ_UNDERRUN) == SD_OCR_STREAM_READ_UNDERRUN)
{
return(SD_STREAM_READ_UNDERRUN);
}
if((response_r1 & SD_OCR_STREAM_WRITE_OVERRUN) == SD_OCR_STREAM_WRITE_OVERRUN)
{
return(SD_STREAM_WRITE_OVERRUN);
}
if((response_r1 & SD_OCR_CID_CSD_OVERWRITE) == SD_OCR_CID_CSD_OVERWRITE)
{
return(SD_CID_CSD_OVERWRITE);
}
if((response_r1 & SD_OCR_WP_ERASE_SKIP) == SD_OCR_WP_ERASE_SKIP)
{
return(SD_WP_ERASE_SKIP);
}
if((response_r1 & SD_OCR_CARD_ECC_DISABLED) == SD_OCR_CARD_ECC_DISABLED)
{
return(SD_CARD_ECC_DISABLED);
}
if((response_r1 & SD_OCR_ERASE_RESET) == SD_OCR_ERASE_RESET)
{
return(SD_ERASE_RESET);
}
if((response_r1 & SD_OCR_AKE_SEQ_ERROR) == SD_OCR_AKE_SEQ_ERROR)
{
return(SD_AKE_SEQ_ERROR);
}
return errorstate;
} |
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发表于 2016-3-27 15:06:57
楼主
