mmc.h

深圳优龙公司LPC2148开发板（与iar公司开发板基本相同）的原理图和配套样例程序

/*
	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

#include "includes.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()  IO0CLR = IO0CLR | 0x1<<20;  //set P0.20 to low,cs enable
#define CS_HIGH() IO0SET = IO0SET | 0x1<<20;  //set P0.20 to high,cs disable

//#define CS_HIGH()  IO0CLR = IO0CLR | 0x1<<20;  //set P0.20 to low,cs enable
//#define CS_LOW()  IO0SET = IO0SET | 0x1<<20;  //set P0.20 to high,cs disable


#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
#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

/* CSD中一些域的字节位置(高字节在前) */
#define TAAC_POS 			1			//TACC
#define NSAC_POS			2			//NSAC

#define READ_BL_LEN_POS		5			//READ_BL_LEN

#define C_SIZE_POS1			6			//C_SIZE upper  2-bit
#define C_SIZE_POS2			7			//C_SIZE middle 8-bit
#define C_SIZE_POS3			8			//C_SIZE lower	2-bit

#define C_SIZE_MULT_POS1	9			//C_SIZE_MULT upper 2-bit
#define C_SIZE_MULT_POS2	10			//C_SIZE_MULT lower 1-bit	

#define SECTOR_SIZE_POS1	10			//SECTOR_SIZE upper 5-bit
#define SECTOR_SIZE_POS2	11			//SECTOR_SIZE lower 2-bit

#define R2WFACTOR_POS 		12			//R2WFACTOR_POS

/**/
#define ERASE_GRP_SIZE_POS   	10		//MMC卡 ERASE_GRP_SIZE 5-bit
#define ERASE_GRP_MULTI_POS1 	10		//MMC卡 ERASE_GRP_MULTI 2-bit
#define ERASE_GRP_MULTI_POS2 	11		//MMC卡 ERASE_GRP_MULTI 3-bit


//CSD中一些域的掩码
#define TAAC_MSK			0x07		//TACC 域掩码
#define NSAC_MSK			0x78		//NSAC 域掩码

#define READ_BL_LEN_MSK		0x0F		//READ_BL_LEN 的掩码

#define C_SIZE_MSK1			0x03		//C_SIZE 高2位掩码
#define C_SIZE_MSK3			0xC0		//C_SIZE 低2位掩码

#define C_SIZE_MULT_MSK1 	0x03		//C_SIZE_MULT 的高2位掩码
#define C_SIZE_MULT_MSK2 	0x80		//C_SIZE_MULT 的低2位掩码

#define R2WFACTOR_MSK		0x1C		//R2WFACTOR 掩码

#define SECTOR_SIZE_MSK1	0x3F		//SECTOR_SIZE 的高5位
#define SECTOR_SIZE_MSK2	0x80		//SECTOR_SIZE 的低2位

#define ERASE_GRP_SIZE_MSK 		0x7C		//MMC卡 ERASE_GRP_SIZE 掩码
#define ERASE_GRP_MULTI_MSK1 	0x03		//MMC卡 ERASE_GRP_MULTI 高2位掩码
#define ERASE_GRP_MULTI_MSK2 	0xE0		//MMC卡 ERASE_GRP_NULTI 低3位掩码


//TI added sub function for top two spi_xxx

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

void MMC_Test( void ) ;

#endif /* _MMCLIB_H */