mmc.h

开源的国外AT91SAM7S64开发板

/*
	mmc.h: Dekcarations for Communikation with the MMC (see mmc.c) in unprotected spi mode.
	
Pin configuration at MSP430F149:
--------------------------------
  MC			MC Pin          MMC         	MMC Pin
  P5.4 			48 		ChipSelect	1
  P5.1 / SlaveInMasterOut 45		DataIn 		2
  . 					GND 		3 (0 V)
  .					VDD 		4 (3.3 V)
  P5.3 UCLK1 / SlaveCLocK 47		Clock 		5
  .					GND 		6 (0 V)
  P5.2 / SlaveOutMasterIn 46		DataOut 	7
---------------------------------------------------------------------

 Revisions
 Date         	Author            			Revision
 11. May 2003		Rolf Freitag				0.02
(2004: corrected MC pin numbers (switched only 45, 46))
*/

#ifndef _MMCLIB_H
#define _MMCLIB_H

#ifndef TXEPT			// transmitter-empty flag
#define TEXPT 0x01
#endif

// macro defines
#define HIGH(a) ((a>>8)&0xFF)	      // high byte from word
#define LOW(a)  (a&0xFF)	      // low byte from word


//#define CS_LOW()  GPPOA &= ~0x00000080
//#define CS_HIGH() GPPOA |= 0x00000080

#define SPI_RXC (IFG2 & URXIFG1)
#define SPI_TXC (IFG2 & UTXIFG1)

#define SPI_RX_COMPLETE (IFG2 & URXIFG1)
#define SPI_TX_READY (IFG2 & UTXIFG1)

#define DUMMY 0xff


// Tokens (nessisary because at nop/idle (and CS active) only 0xff is on the data/command line)
#define MMC_START_DATA_BLOCK_TOKEN 		0xfe	// Data token start byte, Start Single Block Read
#define MMC_START_DATA_MULTIPLE_BLOCK_READ 	0xfe	// Data token start byte, Start Multiple Block Read
#define MMC_START_DATA_BLOCK_WRITE		0xfe	// Data token start byte, Start Single Block Write
#define MMC_START_DATA_MULTIPLE_BLOCK_WRITE	0xfc	// Data token start byte, Start Multiple Block Write
#define MMC_STOP_DATA_MULTIPLE_BLOCK_WRITE	0xfd	// Data toke stop byte, Stop Multiple Block Write


// an affirmative R1 response (no errors)
#define MMC_R1_RESPONSE       0x00


// this variable will be used to track the current block length
// this allows the block length to be set only when needed
// unsigned long _BlockLength = 0;

// error/success codes
#define MMC_SUCCESS           0x00
#define MMC_BLOCK_SET_ERROR   0x01
#define MMC_RESPONSE_ERROR    0x02
#define MMC_DATA_TOKEN_ERROR  0x03
#define MMC_INIT_ERROR        0x04
#define MMC_CRC_ERROR         0x10
#define MMC_WRITE_ERROR       0x11
#define MMC_OTHER_ERROR       0x12
#define MMC_TIMEOUT_ERROR     0xFF


// commands: first bit 0 (start bit), second 1 (transmission bit); CMD-number + 0ffsett 0x40
#define MMC_GO_IDLE_STATE 	0x40    //CMD0
#define MMC_SEND_OP_COND 	0x41    //CMD1
#define MMC_READ_CSD 		0x49	//CMD9
#define MMC_SEND_CID 		0x4a    //CMD10
#define MMC_STOP_TRANSMISSION 	0x4c    //CMD12
#define MMC_SEND_STATUS 	0x4d    //CMD13
#define MMC_SET_BLOCKLEN 	0x50	//CMD16 Set block length for next read/write
#define MMC_READ_SINGLE_BLOCK 	0x51	//CMD17 Read block from memory
#define MMC_READ_MULTIPLE_BLOCK 0x52    //CMD18
#define MMC_CMD_WRITEBLOCK 	0x54	//CMD20 Write block to memory
#define MMC_WRITE BLOCK 	0x58    //CMD25
#define MMC_WRITE_MULTIPLE_BLOCK 0x59   //CMD??
#define MMC_WRITE_CSD 		0x5b	//CMD27 PROGRAM_CSD
#define MMC_SET_WRITE_PROT 	0x5c    //CMD28
#define MMC_CLR_WRITE_PROT 	0x5d    //CMD29
#define MMC_SEND_WRITE_PROT 	0x5e    //CMD30
#define MMC_TAG_SECTOR_START 	0x60    //CMD32
#define MMC_TAG_SECTOR_END 	0x61    //CMD33
#define MMC_UNTAG_SECTOR 	0x62    //CMD34
#define MMC_TAG_EREASE_GROUP_START 0x63 //CMD35
#define MMC_TAG_EREASE_GROUP_END 0x64   //CMD36
#define MMC_UNTAG_EREASE_GROUP 	0x65    //CMD37
#define MMC_EREASE 		0x66    //CMD38
#define MMC_READ_OCR 		0x67    //CMD39
#define MMC_CRC_ON_OFF 		0x68    //CMD40


#define   BIT0        0x00000001
#define   BIT1        0x00000002
#define   BIT2        0x00000004
#define   BIT3        0x00000008
#define   BIT4        0x00000010
#define   BIT5        0x00000020
#define   BIT6        0x00000040
#define   BIT7        0x00000080
#define   BIT8        0x00000100
#define   BIT9        0x00000200
#define   BIT10       0x00000400
#define   BIT11       0x00000800
#define   BIT12       0x00001000
#define   BIT13       0x00002000
#define   BIT14       0x00004000
#define   BIT15       0x00008000
#define   BIT16       0x00010000
#define   BIT17       0x00020000
#define   BIT18       0x00040000
#define   BIT19       0x00080000
#define   BIT20       0x00100000
#define   BIT21       0x00200000
#define   BIT22       0x00400000
#define   BIT23       0x00800000
#define   BIT24       0x01000000
#define   BIT25       0x02000000
#define   BIT26       0x04000000
#define   BIT27       0x08000000
#define   BIT28       0x10000000
#define   BIT29       0x20000000
#define   BIT30       0x40000000
#define   BIT31       0x80000000


//TI added sub function for top two spi_xxx

//my
unsigned char spiReadByte();
void spiWriteByte(const unsigned char data);
void initSPI(void);

// Card present, Write protect
void Init_CP_WP  (void);
// mmc init
char initMMC (void);
// send command to MMC
void mmcSendCmd (const char cmd, unsigned long data, const char crc);
// set MMC block length of count=2^n Byte
char mmcSetBlockLength (const unsigned long);
// read a size Byte big block beginning at the address.
char mmcReadBlock(const unsigned long address, const unsigned long count);
// write a 512 Byte big block beginning at the (aligned) adress
char mmcWriteBlock (const unsigned long address);
// Register arg1 der Laenge arg2 auslesen (into the buffer)
char mmcReadRegister(const char, const unsigned char);
//transmit character via SPI
unsigned char spiSendByte(const unsigned char data);

#endif /* _MMCLIB_H */