SD小问题

灯火百家

SD_Error Status = SD_OK;这段代码是什么意思啊；

还有Status这个是什么意思啊，，在网上搜也一直看不懂

flyleaf

Status 是一个SD_Error类型的变量，直接看源码就好，看看sd_error是如何定义的

灯火百家

typedef enum
{
/**
  * @brief  SDIO specific error defines  
  */   
  SD_CMD_CRC_FAIL                    = (1), /*!< Command response received (but CRC check failed) */
  SD_DATA_CRC_FAIL                   = (2), /*!< Data bock sent/received (CRC check Failed) */
  SD_CMD_RSP_TIMEOUT                 = (3), /*!< Command response timeout */
  SD_DATA_TIMEOUT                    = (4), /*!< Data time out */
  SD_TX_UNDERRUN                     = (5), /*!< Transmit FIFO under-run */
  SD_RX_OVERRUN                      = (6), /*!< Receive FIFO over-run */
  SD_START_BIT_ERR                   = (7), /*!< Start bit not detected on all data signals in widE bus mode */
  SD_CMD_OUT_OF_RANGE                = (8), /*!< CMD's argument was out of range.*/
  SD_ADDR_MISALIGNED                 = (9), /*!< Misaligned address */
  SD_BLOCK_LEN_ERR                   = (10), /*!< Transferred block length is not allowed for the card or the number of transferred bytes does not match the block length */
  SD_ERASE_SEQ_ERR                   = (11), /*!< An error in the sequence of erase command occurs.*/
  SD_BAD_ERASE_PARAM                 = (12), /*!< An Invalid selection for erase groups */
  SD_WRITE_PROT_VIOLATION            = (13), /*!< Attempt to program a write protect block */
  SD_LOCK_UNLOCK_FAILED              = (14), /*!< Sequence or password error has been detected in unlock command or if there was an attempt to access a locked card */
  SD_COM_CRC_FAILED                  = (15), /*!< CRC check of the previous command failed */
  SD_ILLEGAL_CMD                     = (16), /*!< Command is not legal for the card state */
  SD_CARD_ECC_FAILED                 = (17), /*!< Card internal ECC was applied but failed to correct the data */
  SD_CC_ERROR                        = (18), /*!< Internal card controller error */
  SD_GENERAL_UNKNOWN_ERROR           = (19), /*!< General or Unknown error */
  SD_STREAM_READ_UNDERRUN            = (20), /*!< The card could not sustain data transfer in stream read operation. */
  SD_STREAM_WRITE_OVERRUN            = (21), /*!< The card could not sustain data programming in stream mode */
  SD_CID_CSD_OVERWRITE               = (22), /*!< CID/CSD overwrite error */
  SD_WP_ERASE_SKIP                   = (23), /*!< only partial address space was erased */
  SD_CARD_ECC_DISABLED               = (24), /*!< Command has been executed without using internal ECC */
  SD_ERASE_RESET                     = (25), /*!< Erase sequence was cleared before executing because an out of erase sequence command was received */
  SD_AKE_SEQ_ERROR                   = (26), /*!< Error in sequence of authentication. */
  SD_INVALID_VOLTRANGE               = (27),
  SD_ADDR_OUT_OF_RANGE               = (28),
  SD_SWITCH_ERROR                    = (29),
  SD_SDIO_DISABLED                   = (30),
  SD_SDIO_FUNCTION_BUSY              = (31),
  SD_SDIO_FUNCTION_FAILED            = (32),
  SD_SDIO_UNKNOWN_FUNCTION           = (33),

/**
  * @brief  Standard error defines   
  */
  SD_INTERNAL_ERROR,
  SD_NOT_CONFIGURED,
  SD_REQUEST_PENDING,
  SD_REQUEST_NOT_APPLICABLE,
  SD_INVALID_PARAMETER,  
  SD_UNSUPPORTED_FEATURE,  
  SD_UNSUPPORTED_HW,  
  SD_ERROR,  
  SD_OK = 0
} SD_Error;

这个就是把SD_OK的值赋给Status

flyleaf

灯火百家 发表于 2016-8-8 16:11
typedef enum
{
/**

理解正确，不错啊，自己解决了回来帖子告诉大家，有手尾

灯火百家

多谢前辈指点