SDIO 宏定义困惑

1874548238 · 发表于 2013-10-6 20:54:38

原子哥，请教一个问题，关于SDIO的。

我看官方的例程，看到程序前面的宏定义时，有些宏定义不知道是怎么来的，望解答。非常感谢！！！

/**

* @brief Mask for errors Card Status R1 (OCR Register)

*/

#define SD_OCR_ADDR_OUT_OF_RANGE ((uint32_t)0x80000000)

#define SD_OCR_ADDR_MISALIGNED ((uint32_t)0x40000000)

#define SD_OCR_BLOCK_LEN_ERR ((uint32_t)0x20000000)

#define SD_OCR_ERASE_SEQ_ERR ((uint32_t)0x10000000)

#define SD_OCR_BAD_ERASE_PARAM ((uint32_t)0x08000000)

#define SD_OCR_WRITE_PROT_VIOLATION ((uint32_t)0x04000000)

#define SD_OCR_LOCK_UNLOCK_FAILED ((uint32_t)0x01000000)

#define SD_OCR_COM_CRC_FAILED ((uint32_t)0x00800000)

#define SD_OCR_ILLEGAL_CMD ((uint32_t)0x00400000)

#define SD_OCR_CARD_ECC_FAILED ((uint32_t)0x00200000)

#define SD_OCR_CC_ERROR ((uint32_t)0x00100000)

#define SD_OCR_GENERAL_UNKNOWN_ERROR ((uint32_t)0x00080000)

#define SD_OCR_STREAM_READ_UNDERRUN ((uint32_t)0x00040000)

#define SD_OCR_STREAM_WRITE_OVERRUN ((uint32_t)0x00020000)

#define SD_OCR_CID_CSD_OVERWRIETE ((uint32_t)0x00010000)

#define SD_OCR_WP_ERASE_SKIP ((uint32_t)0x00008000)

#define SD_OCR_CARD_ECC_DISABLED ((uint32_t)0x00004000)

#define SD_OCR_ERASE_RESET ((uint32_t)0x00002000)

#define SD_OCR_AKE_SEQ_ERROR ((uint32_t)0x00000008)

#define SD_OCR_ERRORBITS ((uint32_t)0xFDFFE008)

这些个我知道，手册上有，P70 Card Status 里面的

但是下面这些个不知道在哪里，手册上没找到啊

/**

* @brief Masks for R6 Response

*/

#define SD_R6_GENERAL_UNKNOWN_ERROR ((uint32_t)0x00002000)

#define SD_R6_ILLEGAL_CMD ((uint32_t)0x00004000)

#define SD_R6_COM_CRC_FAILED ((uint32_t)0x00008000)

#define SD_VOLTAGE_WINDOW_SD ((uint32_t)0x80100000)

#define SD_HIGH_CAPACITY ((uint32_t)0x40000000)

#define SD_STD_CAPACITY ((uint32_t)0x00000000)

#define SD_CHECK_PATTERN ((uint32_t)0x000001AA)

#define SD_MAX_VOLT_TRIAL ((uint32_t)0x0000FFFF)

#define SD_ALLZERO ((uint32_t)0x00000000)

#define SD_WIDE_BUS_SUPPORT ((uint32_t)0x00040000)

#define SD_SINGLE_BUS_SUPPORT ((uint32_t)0x00010000)

#define SD_CARD_LOCKED ((uint32_t)0x02000000)

#define SD_DATATIMEOUT ((uint32_t)0xFFFFFFFF)

#define SD_0TO7BITS ((uint32_t)0x000000FF)

#define SD_8TO15BITS ((uint32_t)0x0000FF00)

#define SD_16TO23BITS ((uint32_t)0x00FF0000)

#define SD_24TO31BITS ((uint32_t)0xFF000000)

#define SD_MAX_DATA_LENGTH ((uint32_t)0x01FFFFFF)

#define SD_HALFFIFO ((uint32_t)0x00000008)

#define SD_HALFFIFOBYTES ((uint32_t)0x00000020)

望指教，谢谢各位了！！！！

1026268087 · 发表于 2013-10-6 21:42:15

这些定义的意思要看懂的话，你要好好的读一下stm32的数据手册了，这些定义就是给你定义了stm32里面的寄存器的地址，让编译器能正常工作，例如，如果你要开启某个端口，你要设置相应的寄存器的位，而你写程序的话，你应该不会自己去做这些事情吧，你会写一些函数，编译器要编译的时候，会自动把函数转换的。

希望能帮到你。