SDIO操作SD卡，为什么CMD8另外列出来？

熊大 · 发表于 2017-11-13 11:30:45

其他的命令
#define SD_CMD_GO_IDLE_STATE                      ((u8)0)
#define SD_CMD_SEND_OP_COND                      ((u8)1)
#define SD_CMD_ALL_SEND_CID                      ((u8)2)
#define SD_CMD_SET_REL_ADDR                      ((u8)3) /*!< SDIO_SEND_REL_ADDR for SD Card */
#define SD_CMD_SET_DSR                            ((u8)4)
#define SD_CMD_SDIO_SEN_OP_COND                   ((u8)5)
#define SD_CMD_HS_SWITCH                         ((u8)6)
#define SD_CMD_SEL_DESEL_CARD                   ((u8)7)
#define SD_CMD_HS_SEND_EXT_CSD                   ((u8)8)
#define SD_CMD_SEND_CSD                         ((u8)9)
#define SD_CMD_SEND_CID                         ((u8)10)
#define SD_CMD_READ_DAT_UNTIL_STOP                ((u8)11) /*!< SD Card doesn't support it */
#define SD_CMD_STOP_TRANSMISSION                ((u8)12)
#define SD_CMD_SEND_STATUS                      ((u8)13)
#define SD_CMD_HS_BUSTEST_READ                   ((u8)14)
#define SD_CMD_GO_INACTIVE_STATE                ((u8)15)
#define SD_CMD_SET_BLOCKLEN                      ((u8)16)
#define SD_CMD_READ_SINGLE_BLOCK                ((u8)17)
#define SD_CMD_READ_MULT_BLOCK                   ((u8)18)
#define SD_CMD_HS_BUSTEST_WRITE                   ((u8)19)
#define SD_CMD_WRITE_DAT_UNTIL_STOP             ((u8)20)
#define SD_CMD_SET_BLOCK_COUNT                   ((u8)23)
#define SD_CMD_WRITE_SINGLE_BLOCK                ((u8)24)
#define SD_CMD_WRITE_MULT_BLOCK                   ((u8)25)
#define SD_CMD_PROG_CID                         ((u8)26)
#define SD_CMD_PROG_CSD                         ((u8)27)
#define SD_CMD_SET_WRITE_PROT                   ((u8)28)
#define SD_CMD_CLR_WRITE_PROT                   ((u8)29)
#define SD_CMD_SEND_WRITE_PROT                   ((u8)30)
#define SD_CMD_SD_ERASE_GRP_START                ((u8)32) /*!< To set the address of the first write
                                                               block to be erased. (For SD card only) */
#define SD_CMD_SD_ERASE_GRP_END                   ((u8)33) /*!< To set the address of the last write block of the
                                                               continuous range to be erased. (For SD card only) */
#define SD_CMD_ERASE_GRP_START                   ((u8)35) /*!< To set the address of the first write block to be erased.
                                                               (For MMC card only spec 3.31) */

#define SD_CMD_ERASE_GRP_END                      ((u8)36) /*!< To set the address of the last write block of the
                                                               continuous range to be erased. (For MMC card only spec 3.31) */

#define SD_CMD_ERASE                            ((u8)38)
#define SD_CMD_FAST_IO                            ((u8)39) /*!< SD Card doesn't support it */
#define SD_CMD_GO_IRQ_STATE                      ((u8)40) /*!< SD Card doesn't support it */
#define SD_CMD_LOCK_UNLOCK                      ((u8)42)
#define SD_CMD_APP_CMD                            ((u8)55)
#define SD_CMD_GEN_CMD                            ((u8)56)
#define SD_CMD_NO_CMD                            ((u8)64)

/**
  * @brief Following commands are SD Card Specific commands.
  *       SDIO_APP_CMD ：CMD55 should be sent before sending these commands.
  */
#define SD_CMD_APP_SD_SET_BUSWIDTH                ((u8)6)  /*!< For SD Card only */
#define SD_CMD_SD_APP_STAUS                      ((u8)13) /*!< For SD Card only */
#define SD_CMD_SD_APP_SEND_NUM_WRITE_BLOCKS       ((u8)22) /*!< For SD Card only */
#define SD_CMD_SD_APP_OP_COND                   ((u8)41) /*!< For SD Card only */
#define SD_CMD_SD_APP_SET_CLR_CARD_DETECT       ((u8)42) /*!< For SD Card only */
#define SD_CMD_SD_APP_SEND_SCR                   ((u8)51) /*!< For SD Card only */
#define SD_CMD_SDIO_RW_DIRECT                   ((u8)52) /*!< For SD I/O Card only */
#define SD_CMD_SDIO_RW_EXTENDED                   ((u8)53) /*!< For SD I/O Card only */

/**
  * @brief Following commands are SD Card Specific security commands.
  *       SDIO_APP_CMD should be sent before sending these commands.
  */
#define SD_CMD_SD_APP_GET_MKB                   ((u8)43) /*!< For SD Card only */
#define SD_CMD_SD_APP_GET_MID                   ((u8)44) /*!< For SD Card only */
#define SD_CMD_SD_APP_SET_CER_RN1                ((u8)45) /*!< For SD Card only */
#define SD_CMD_SD_APP_GET_CER_RN2                ((u8)46) /*!< For SD Card only */
#define SD_CMD_SD_APP_SET_CER_RES2                ((u8)47) /*!< For SD Card only */
#define SD_CMD_SD_APP_GET_CER_RES1                ((u8)48) /*!< For SD Card only */
#define SD_CMD_SD_APP_SECURE_READ_MULTIPLE_BLOCK ((u8)18) /*!< For SD Card only */
#define SD_CMD_SD_APP_SECURE_WRITE_MULTIPLE_BLOCK  ((u8)25) /*!< For SD Card only */
#define SD_CMD_SD_APP_SECURE_ERASE                ((u8)38) /*!< For SD Card only */
#define SD_CMD_SD_APP_CHANGE_SECURE_AREA          ((u8)49) /*!< For SD Card only */
#define SD_CMD_SD_APP_SECURE_WRITE_MKB          ((u8)48) /*!< For SD Card only */

而为什么cmd8 #define SDIO_SEND_IF_COND             ((u32)0x00000008)