sd卡tf卡进入spi模式代码

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/* 命令响应定义 define command's response */

#define R1 1

#define R1B 2

#define R2 3

#define R3 4

/**********************************************

     SD卡SPI模式下命令集

**********************************************/

/******************************** 基本命令集 Basic command set **************************/

/* 复位SD 卡 Reset cards to idle state */

#define CMD0 0

#define CMD0_R R1

/* 读OCR寄存器 Read the OCR (MMC mode, do not use for SD cards) */

#define CMD1 1

#define CMD1_R R1

/* 读CSD寄存器 Card sends the CSD */

#define CMD9 9

#define CMD9_R R1

/* 读CID寄存器 Card sends CID */

#define CMD10 10

#define CMD10_R R1

/* 停止读多块时的数据传输 Stop a multiple block (stream) read/write operation */

#define CMD12 12

#define CMD12_R R1B

/* 读 Card_Status 寄存器 Get the addressed card's status register */

#define CMD13 13

#define CMD13_R R2

/***************************** 块读命令集 Block read commands **************************/

/* 设置块的长度 Set the block length */

#define CMD16 16

#define CMD16_R R1

/* 读单块 Read a single block */

#define CMD17 17

#define CMD17_R R1

/* 读多块,直至主机发送CMD12为止 Read multiple blocks until a CMD12 */

#define CMD18 18

#define CMD18_R R1

/***************************** 块写命令集 Block write commands *************************/

/* 写单块 Write a block of the size selected with CMD16 */

#define CMD24 24

#define CMD24_R R1

/* 写多块 Multiple block write until a CMD12 */

#define CMD25 25

#define CMD25_R R1

/* 写CSD寄存器 Program the programmable bits of the CSD */

#define CMD27 27

#define CMD27_R R1

/***************************** 写保护 Write protection *****************************/

/* Set the write protection bit of the addressed group */

#define CMD28 28

#define CMD28_R R1B

/* Clear the write protection bit of the addressed group */

#define CMD29 29

#define CMD29_R R1B

/* Ask the card for the status of the write protection bits */

#define CMD30 30

#define CMD30_R R1

/***************************** 擦除命令 Erase commands *******************************/

/* 设置擦除块的起始地址(只用于SD卡) Set the address of the first write block to be erased(only for SD) */

#define CMD32 32

#define CMD32_R R1

/* 设置擦除块的终止地址(只用于SD卡) Set the address of the last write block to be erased(only for SD) */

#define CMD33 33

#define CMD33_R R1

/* 设置擦除块的起始地址(只用于MMC卡) Set the address of the first write block to be erased(only for MMC) */

#define CMD35 35

#define CMD35_R R1

/* 设置擦除块的终止地址(只用于MMC卡) Set the address of the last write block to be erased(only for MMC) */

#define CMD36 36

#define CMD36_R R1

/* 擦除所选择的块 Erase the selected write blocks */

#define CMD38 38

#define CMD38_R R1B

/***************************** 锁卡命令 Lock Card commands ***************************/

/* 设置/复位密码或上锁/解锁卡 Set/reset the password or lock/unlock the card */

#define CMD42 42

#define CMD42_R        R1B

/* Commands from 42 to 54, not defined here */

/***************************** 应用命令 Application-specific commands ****************/

/* 禁止下一个命令为应用命令  Flag that the next command is application-specific */

#define CMD55 55

#define CMD55_R R1

/* 应用命令的通用I/O  General purpose I/O for application-specific commands */

#define CMD56 56

#define CMD56_R R1

/* 读OCR寄存器  Read the OCR (SPI mode only) */

#define CMD58 58

#define CMD58_R R3

/* 使能或禁止 CRC Turn CRC on or off */

#define CMD59 59

#define CMD59_R R1

/***************************** 应用命令 Application-specific commands ***************/

/* 获取 SD Status寄存器 Get the SD card's status */

#define ACMD13 13

#define ACMD13_R R2

/* 得到已写入卡中的块的个数 Get the number of written write blocks (Minus errors ) */

#define ACMD22 22

#define ACMD22_R R1

/* 在写之前,设置预先擦除的块的个数 Set the number of write blocks to be pre-erased before writing */

#define ACMD23 23

#define ACMD23_R R1

/* 读取OCR寄存器 Get the card's OCR (SD mode) */

#define ACMD41 41

#define ACMD41_R R1

/* 连接/断开CD/DATA[3]引脚上的上拉电阻 Connect or disconnect the 50kOhm internal pull-up on CD/DAT[3] */

#define ACMD42 42

#define ACMD42_R R1

/* 读取SCR寄存器 Get the SD configuration register */

#define ACMD51 51

#define ACMD51_R R1