sdcard.c File Reference

 SD Card interface implementation

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#include "sdcard.h"
#include "dev/watchdog.h"
#include <util/delay.h>

Go to the source code of this file.

Macros
#define	SDCARD_CMD0   0
	CMD0 – GO_IDLE_STATE.
#define	SDCARD_CMD1   1
	CMD1 – SEND_OP_COND.
#define	SDCARD_CMD8   8
	CMD8 – SEND_IF_COND (deprecated?)
#define	SDCARD_CMD9   9
	CMD9 – SEND_CSD.
#define	SDCARD_CMD10   10
	CMD10 – SEND_CID.
#define	SDCARD_CMD13   13
	CMD13 – SEND_STATUS.
#define	SDCARD_CMD16   16
	CMD16 – SET_BLOCKLEN.
#define	SDCARD_CMD17   17
	CMD17 – READ_SINGLE_BLOCK.
#define	SDCARD_CMD18   18
	CMD18 – READ_MULTIPLE_BLOCK.
#define	SDCARD_CMD24   24
	CMD24 – WRITE_BLOCK.
#define	SDCARD_CMD25   25
	CMD25 – WRITE_MULTIPLE_BLOCK.
#define	SDCARD_CMD27   27
	CMD27 – PROGRAM_CSD.
#define	SDCARD_CMD32   32
	CMD32 – ERASE_WR_BLK_START_ADDR.
#define	SDCARD_CMD33   33
	CMD33 – ERASE_WR_BLK_END_ADDR.
#define	SDCARD_CMD38   38
	CMD38 – ERASE.
#define	SDCARD_CMD58   58
	CMD58 – READ_OCR.
#define	SDCARD_CMD59   59
	CMD59 – CRC_ON_OFF.
#define	SDCARD_CMD55   55
	CMD55 – APP_CMD.
#define	SDCARD_ACMD23   (IS_ACMD | 23)
	ACMD23 – SET_WR_BLK_ERASE_COUNT.
#define	SDCARD_ACMD41   (IS_ACMD | 41)
	ACMD41 – SD_SEND_OP_COND.

Functions
uint64_t	sdcard_get_card_size ()
	Returns card size. More...
uint32_t	sdcard_get_block_num ()
uint16_t	sdcard_get_block_size ()
	Returns the size of one block in bytes. More...
uint8_t	sdcard_is_SDSC ()
	This function indicates if a card is a SDSC or SDHC/SDXC card. More...
uint8_t	sdcard_set_CRC (uint8_t enable)
	Turns crc capabilities of the card on or off. More...
uint8_t	sdcard_read_csd (uint8_t *buffer)
	This function will read the CSD (16 Bytes) of the SD-Card. More...
void	sdcard_cmd_crc (uint8_t *cmd)
	This function calculates the CRC7 for SD Card commands. More...
uint16_t	sdcard_data_crc (uint8_t *data)
	This function calculates the CRC16 for a 512 Byte data block. More...
uint8_t	sdcard_init (void)
	Initializes the SD Card. More...
uint8_t	sdcard_erase_blocks (uint32_t startaddr, uint32_t endaddr)
uint8_t	sdcard_read_block (uint32_t addr, uint8_t *buffer)
	This function will read one block (512, 1024, 2048 or 4096Byte) of the SD-Card. More...
uint8_t	sdcard_write_block (uint32_t addr, uint8_t *buffer)
	This function will write one block (512, 1024, 2048 or 4096Byte) of the SD-Card. More...
uint8_t	sdcard_write_multi_block_start (uint32_t addr, uint32_t num_blocks)
	Prepares to write multiple blocks sequentially. More...
uint8_t	sdcard_write_multi_block_next (uint8_t *buffer)
	Writes single of multiple sequental blocks. More...
uint8_t	sdcard_write_multi_block_stop ()
	Stops multiple block write. More...
uint8_t	sdcard_write_cmd (uint8_t cmd, uint32_t *arg, uint8_t *resp)
	This function sends a command via SPI to the SD-Card. More...

Detailed Description

 SD Card interface implementation

Author

Original source: Ulrich Radig << modified by >> Ulf Kulau kulau.nosp@m.@ibr.nosp@m..cs.t.nosp@m.u-bs.nosp@m..de Christoph Peltz peltz.nosp@m.@ibr.nosp@m..cs.t.nosp@m.u-bs.nosp@m..de Enrico Joerns e.joe.nosp@m.rns@.nosp@m.tu-bs.nosp@m..de

Definition in file sdcard.c.