sd.h

mp3源码,是自己写的,关于vs1001与CD卡的读取歌曲,和播放.

/*返回应答长度*/
#define R1  1
#define R1B 2 
#define R2  3
#define R3  4
/*****************R1 R1B error format******/
#define MSK_IDLE 0x01
#define MSK_ERASE_RST 0x02
#define MSK_ILL_CMD 0x04
#define MSK_CRC_ERR 0x08
#define MSK_ERASE_SEQ_ERR 0x10
#define MSK_ADDR_ERR 0x20
#define MSK_PARAM_ERR 0x40

#define MSK_OCR_33 0xc0
/*****************
/********Basic Command Set*******/
/***Reset***/
#define CMD0    0
#define CMD0_R  R1
/***Read the OCR */
#define CMD1    1
#define CMD1_R  R1
/*Card sends the CSD*/
#define CMD9    0
#define CMD9_R  R1
/*Card sends CID*/
#define CMD10    10
#define CMD10_R  R1
/*Stop block read/write operation*/
#define CMD13    13
#define CMD13_R  R2
/****************Block Read Command*********/
/*Set Block Length*/
#define CMD16    16
#define CMD16_R  R1
/*Read a single block*/
#define CMD17    17
#define CMD17_R  R1
/*Read blocks until a COMD12*/
#define CMD18    18
#define CMD18_R  R1
/***************Block write command*********/
/*write a block of size selected with CMD16*/
#define CMD24    24
#define CMD24_R  R1
/*block write until a CMD12*/
#define CMD25    25
#define CMD25_R  R1
/*Program the programmable bits of the CSD*/
#define CMD27    27
#define CMD27_R  R1

/***************************** 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
/***************************** Erase commands *******************************/
/* Set the address of the first write block to be erased */
#define CMD32 32
#define CMD32_R R1
/* Set the address of the last write block to be erased */
#define CMD33 33
#define CMD33_R R1
/* Erase the selected write blocks */
#define CMD38 38
#define CMD38_R R1B
/***************************** Lock Card commands ***************************/
/* Commands from 42 to 54, not defined here */
/***************************** Application-specific commands ****************/
/* Flag that the next command is application-specific */
#define CMD55 55
#define CMD55_R R1
/* General purpose I/O for application-specific commands */
#define CMD56 56
#define CMD56_R R1
/* Read the OCR (SPI mode only) */
#define CMD58 58
#define CMD58_R R3
/* Turn CRC on or off */
#define CMD59 59
#define CMD59_R R1
/***************************** Application-specific commands ***************/
/* Get the SD card's status */
#define ACMD13 13
#define ACMD13_R R2
/* Get the number of written write blocks (Minus errors ) */
#define ACMD22 22
#define ACMD22_R R1
/* Set the number of write blocks to be pre-erased before writing */
#define ACMD23 23
#define ACMD23_R R1
/* Get the card's OCR (SD mode) */
#define ACMD41 41
#define ACMD41_R R1
/* Connect or disconnect the 50kOhm internal pull-up on CD/DAT[3] */
#define ACMD42 42
#define ACMD42_R R1
/* Get the SD configuration register */
#define ACMD51 51
#define ACMD51_R R1