mmc.c File Reference

#include "user_config.h"
#include "mmc_hal.h"
#include "printf/mathio.h"
#include "fatfs.sup/fatfs.h"

Go to the source code of this file.

Macros
#define	CS_LOW()   mmc_spi_begin() /* Set MMC_CS = low */
#define	CS_HIGH()   mmc_spi_end() /* Set MMC_CS = high */
#define	MMC_CD   mmc_ins_status() /* Test if card detected. yes:true, no:false, default:true */
#define	MMC_WP   mmc_wp_status() /* Test if write protected. yes:true, no:false, default:false */
#define	FCLK_SLOW()   mmc_slow() /* Set SPI slow clock (100-400kHz) */
#define	FCLK_FAST()   mmc_fast() /* Set SPI fast clock (20MHz max) */
#define	CMD0   (0) /* GO_IDLE_STATE */
#define	CMD1   (1) /* SEND_OP_COND (MMC) */
#define	ACMD41   (0x80+41) /* SEND_OP_COND (SDC) */
#define	CMD8   (8) /* SEND_IF_COND */
#define	CMD9   (9) /* SEND_CSD */
#define	CMD10   (10) /* SEND_CID */
#define	CMD12   (12) /* STOP_TRANSMISSION */
#define	ACMD13   (0x80+13) /* SD_STATUS (SDC) */
#define	CMD16   (16) /* SET_BLOCKLEN */
#define	CMD17   (17) /* READ_SINGLE_BLOCK */
#define	CMD18   (18) /* READ_MULTIPLE_BLOCK */
#define	CMD23   (23) /* SET_BLOCK_COUNT (MMC) */
#define	ACMD23   (0x80+23) /* SET_WR_BLK_ERASE_COUNT (SDC) */
#define	CMD24   (24) /* WRITE_BLOCK */
#define	CMD25   (25) /* WRITE_MULTIPLE_BLOCK */
#define	CMD32   (32) /* ERASE_ER_BLK_START */
#define	CMD33   (33) /* ERASE_ER_BLK_END */
#define	CMD38   (38) /* ERASE */
#define	CMD48   (48) /* READ_EXTR_SINGLE */
#define	CMD49   (49) /* WRITE_EXTR_SINGLE */
#define	CMD55   (55) /* APP_CMD */
#define	CMD58   (58) /* READ_OCR */

Functions
static MEMSPACE void	power_on (void)
	power on More...
static MEMSPACE void	power_off (void)
	power off More...
static BYTE	xchg_spi (BYTE dat)
	send/receive a SPI byte More...
static void	rcvr_spi_multi (BYTE *p, UINT cnt)
	Receive a data block fast. More...
static void	xmit_spi_multi (const BYTE *p, UINT cnt)
	Send a data block fast. More...
MEMSPACE int	wait_ready (UINT wt)
	wait for card ready More...
static MEMSPACE void	deselect (void)
	Deselect the card and release SPI bus. More...
static MEMSPACE int	select (void)
	Select the card and wait for ready. More...
static MEMSPACE int	rcvr_datablock (BYTE *buff, UINT btr)
	Receive a data packet from MMC. More...
static MEMSPACE BYTE	send_cmd (BYTE cmd, DWORD arg)
	Send a data packet to MMC. More...
MEMSPACE DSTATUS	mmc_disk_initialize (void)
	Public Functions. More...
MEMSPACE DSTATUS	mmc_disk_status (void)
	Get Disk Status. More...
MEMSPACE DRESULT	mmc_disk_read (BYTE *buff, DWORD sector, UINT count)
	Read Sector(s) More...
void	mmc_disk_timerproc (void)
	Write Sector(s) More...

Variables
volatile DSTATUS	Stat = STA_NOINIT
static volatile BYTE	Timer1
static volatile BYTE	Timer2
static BYTE	CardType

Macro Definition Documentation

#define ACMD13   (0x80+13) /* SD_STATUS (SDC) */

Definition at line 61 of file mmc.c.

Referenced by mmc_disk_read().

#define ACMD23   (0x80+23) /* SET_WR_BLK_ERASE_COUNT (SDC) */

Definition at line 66 of file mmc.c.

Referenced by mmc_disk_read().

#define ACMD41   (0x80+41) /* SEND_OP_COND (SDC) */

Definition at line 56 of file mmc.c.

Referenced by mmc_disk_initialize().

#define CMD0   (0) /* GO_IDLE_STATE */

Definition at line 54 of file mmc.c.

Referenced by mmc_disk_initialize(), and send_cmd().

#define CMD1   (1) /* SEND_OP_COND (MMC) */

Definition at line 55 of file mmc.c.

Referenced by mmc_disk_initialize().

#define CMD10   (10) /* SEND_CID */

Definition at line 59 of file mmc.c.

Referenced by mmc_disk_read().

#define CMD12   (12) /* STOP_TRANSMISSION */

Definition at line 60 of file mmc.c.

Referenced by mmc_disk_read(), and send_cmd().

#define CMD16   (16) /* SET_BLOCKLEN */

Definition at line 62 of file mmc.c.

Referenced by mmc_disk_initialize().

#define CMD17   (17) /* READ_SINGLE_BLOCK */

Definition at line 63 of file mmc.c.

Referenced by mmc_disk_read().

#define CMD18   (18) /* READ_MULTIPLE_BLOCK */

Definition at line 64 of file mmc.c.

Referenced by mmc_disk_read().

#define CMD23   (23) /* SET_BLOCK_COUNT (MMC) */

Definition at line 65 of file mmc.c.

#define CMD24   (24) /* WRITE_BLOCK */

Definition at line 67 of file mmc.c.

Referenced by mmc_disk_read().

#define CMD25   (25) /* WRITE_MULTIPLE_BLOCK */

Definition at line 68 of file mmc.c.

Referenced by mmc_disk_read().

#define CMD32   (32) /* ERASE_ER_BLK_START */

Definition at line 69 of file mmc.c.

Referenced by mmc_disk_read().

#define CMD33   (33) /* ERASE_ER_BLK_END */

Definition at line 70 of file mmc.c.

Referenced by mmc_disk_read().

#define CMD38   (38) /* ERASE */

Definition at line 71 of file mmc.c.

Referenced by mmc_disk_read().

#define CMD48   (48) /* READ_EXTR_SINGLE */

Definition at line 72 of file mmc.c.

Referenced by mmc_disk_read().

#define CMD49   (49) /* WRITE_EXTR_SINGLE */

Definition at line 73 of file mmc.c.

Referenced by mmc_disk_read().

#define CMD55   (55) /* APP_CMD */

Definition at line 74 of file mmc.c.

Referenced by send_cmd().

#define CMD58   (58) /* READ_OCR */

Definition at line 75 of file mmc.c.

Referenced by mmc_disk_initialize(), and mmc_disk_read().

#define CMD8   (8) /* SEND_IF_COND */

Definition at line 57 of file mmc.c.

Referenced by mmc_disk_initialize(), and send_cmd().

#define CMD9   (9) /* SEND_CSD */

Definition at line 58 of file mmc.c.

Referenced by mmc_disk_read().

#define CS_HIGH

(

)

mmc_spi_end() /* Set MMC_CS = high */

Definition at line 40 of file mmc.c.

Referenced by deselect().

#define CS_LOW

(

)

mmc_spi_begin() /* Set MMC_CS = low */

Definition at line 39 of file mmc.c.

Referenced by select().

#define FCLK_FAST

(

)

mmc_fast() /* Set SPI fast clock (20MHz max) */

Definition at line 45 of file mmc.c.

Referenced by mmc_disk_initialize().

#define FCLK_SLOW

(

)

mmc_slow() /* Set SPI slow clock (100-400kHz) */

Definition at line 44 of file mmc.c.

Referenced by mmc_disk_initialize().

#define MMC_CD   mmc_ins_status() /* Test if card detected. yes:true, no:false, default:true */

Definition at line 42 of file mmc.c.

Referenced by mmc_disk_timerproc().

#define MMC_WP   mmc_wp_status() /* Test if write protected. yes:true, no:false, default:false */

Definition at line 43 of file mmc.c.

Referenced by mmc_disk_timerproc().

Function Documentation

static MEMSPACE void deselect ( void  )

static

Deselect the card and release SPI bus.

Returns

void

Definition at line 189 of file mmc.c.

Referenced by mmc_disk_initialize(), mmc_disk_read(), select(), and send_cmd().

MEMSPACE DSTATUS mmc_disk_initialize

(

void

)

Public Functions.

Initialize Disk Drive

Returns

Stat

Definition at line 340 of file mmc.c.

Referenced by disk_initialize().

MEMSPACE DRESULT mmc_disk_read	(	BYTE *	buff,
		DWORD	sector,
		UINT	count
	)

Read Sector(s)

Parameters

[in]	buff	read buffer
[in]	sector	start sector number
[in]	count	sector count

Returns

0 ok

non zero error

Definition at line 433 of file mmc.c.

Referenced by disk_read().

MEMSPACE DSTATUS mmc_disk_status

(

void

)

Get Disk Status.

Returns

Stat

STA_NOINIT if no drive

Definition at line 420 of file mmc.c.

Referenced by disk_status().

void mmc_disk_timerproc

(

void

)

Write Sector(s)

Parameters

[out]	buff	write buffer
[in]	sector	start sector number
[in]	count	sector count

Returns

0 ok

non zero error Miscellaneous Functions

Parameters

[in]	cmd	Control code
	[in|out]	buff: Send/Receive buffer

Returns

result mmc timer processes

Definition at line 708 of file mmc.c.

Referenced by disk_timerproc(), and mmc_task().

static MEMSPACE void power_off ( void  )

static

power off

Returns

void

Definition at line 110 of file mmc.c.

Referenced by mmc_disk_initialize(), and mmc_disk_read().

static MEMSPACE void power_on ( void  )

static

power on

Returns

void

Definition at line 97 of file mmc.c.

static MEMSPACE int rcvr_datablock ( BYTE *  buff, UINT  btr  )

static

Receive a data packet from MMC.

Parameters

[in]	buff	Data buffer to read data into
[in]	btr	Bytes to read

Returns

1 Successful

0 Error

Definition at line 224 of file mmc.c.

Referenced by mmc_disk_read().

static void rcvr_spi_multi ( BYTE *  p, UINT  cnt  )

static

Receive a data block fast.

Parameters

[in]	p	Data block to be read
[in]	cnt	Bytes to read

Returns

void

Definition at line 139 of file mmc.c.

Referenced by rcvr_datablock().

static MEMSPACE int select ( void  )

static

Select the card and wait for ready.

Returns

1 Successful

0 Timeout

Definition at line 202 of file mmc.c.

Referenced by mmc_disk_read(), and send_cmd().

static MEMSPACE BYTE send_cmd ( BYTE  cmd, DWORD  arg  )

static

Send a data packet to MMC.

Parameters

[in]	buff	Data buffer to write
[in]	btr	Bytes to write

Returns

1 Successful

0 Error Send a command packet to MMC

Parameters

[in]	send_cmd	Commend Index
[in]	cmd	Argument

Returns

R1 resp

bit7==1Send failed

Definition at line 288 of file mmc.c.

Referenced by mmc_disk_initialize(), and mmc_disk_read().

MEMSPACE int wait_ready

(

UINT

wt

)

wait for card ready

Parameters

[in]

wt

ms to wait

Returns

1 Ready

0 Timeout

Definition at line 169 of file mmc.c.

Referenced by mmc_disk_read(), rcvr_datablock(), and select().

static BYTE xchg_spi ( BYTE  dat )

static

send/receive a SPI byte

Parameters

[in]

dat

data to send

Returns

Data read

Definition at line 126 of file mmc.c.

Referenced by deselect(), mmc_disk_initialize(), mmc_disk_read(), rcvr_datablock(), select(), send_cmd(), and wait_ready().

static void xmit_spi_multi ( const BYTE *  p, UINT  cnt  )

static

Send a data block fast.

Parameters

[out]	p	Data block to be sent
[in]	cnt	Bytes to send

Returns

void

Definition at line 152 of file mmc.c.

Referenced by rcvr_datablock().

Variable Documentation

BYTE CardType

static

Definition at line 85 of file mmc.c.

Referenced by mmc_disk_initialize(), and mmc_disk_read().

volatile DSTATUS Stat = STA_NOINIT

Definition at line 79 of file mmc.c.

Referenced by mmc_disk_initialize(), mmc_disk_read(), mmc_disk_status(), mmc_disk_timerproc(), mmc_init(), and mmc_test_timeout().

volatile BYTE Timer1

static

Definition at line 82 of file mmc.c.

Referenced by mmc_disk_timerproc().

volatile BYTE Timer2

static

Definition at line 82 of file mmc.c.

Referenced by mmc_disk_timerproc().