mmc_z.h

单的SD卡读写程序--根据网上的程序跟改

/**************************************************************************************
//------------------ MMC/SD-Card Reading and Writing implementation -------------------
//FileName     : mmc.c
//Function     : Connect AVR to MMC/SD 
//Created by   : ZhengYanbo
//Created date : 15/08/2005
//Version      : V1.2
//Last Modified: 19/08/2005
//Filesystem   : Read or Write MMC without any filesystem

//CopyRight (c) 2005 ZhengYanbo
//Email: [e-mail]
****************************************************************************************/

#ifndef _MMC_H_
#define _MMC_H_

//If use MMC-Card then set to 1
#define	USE_MMC 		1       //EXPERIMENTAL NOT READY!!!! 
#define HW_SPI_Mode     1       //1:hardware SPI 0:software SPI


#define SPI_DO_High	rPDATD |= 0X01
#define SPI_DO_Low	rPDATD &= (~0X01)

#define SPI_CS_High	rPDATC |= (0X01<<6)
#define SPI_CS_Low	rPDATC &= (~(0X01<<6))

#define SPI_CLK_High	rPDATD |= (0X01<<1)
#define SPI_CLK_Low	rPDATD &= (~(0X01<<1))

#define SPI_DO	rPDATD&0X01

#define SPI_DI_High	rPDATD |= (0X01<<3)
#define SPI_DI_Low	rPDATD &= (~(0X01<<3))

//------------------------------------------------------------
// Error define
//-------------------------------------------------------------
#define INIT_CMD0_ERROR     0x01
#define INIT_CMD1_ERROR		0x02
#define WRITE_BLOCK_ERROR	0x03
#define READ_BLOCK_ERROR   	0x04 
//-------------------------------------------------------------
// data type
//-------------------------------------------------------------   
// this structure holds info on the MMC card currently inserted 
typedef struct MMC_VOLUME_INFO
{ //MMC/SD Card info
	unsigned short  size_MB;
	unsigned char   sector_multiply;
	unsigned short   sector_count;
	unsigned char   name[6];
	unsigned short hResered;
} VOLUME_INFO_TYPE; 


typedef struct STORE 
{ 
  unsigned char   data[256]; 
} BUFFER_TYPE; //256 bytes, 128 words

BUFFER_TYPE sectorBuffer; //512 bytes for sector buffer

//--------------------------------------------------------------
	unsigned short	readPos=0;
	unsigned char	sectorPos=0;
	unsigned char    LBA_Opened=0; //Set to 1 when a sector is opened.
	unsigned char    Init_Flag;    //Set it to 1 when Init is processing.
//---------------------------------------------------------------
// Prototypes
//---------------------------------------------------------------
void MMC_Port_Init(void);

unsigned char Read_Byte_MMC(void);
//unsigned char Read_Byte_MMC_Long(void);

void Write_Byte_MMC(unsigned char value);
//void Write_Byte_MMC_Long(unsigned char value);

unsigned char MMC_Read_Block(unsigned char *CMD,unsigned char *Buffer,unsigned int Bytes);
unsigned char MMC_Init(void);
unsigned char MMC_write_sector(unsigned long addr,unsigned char *Buffer);
//unsigned char MMC_read_sector(unsigned long addr,unsigned char *Buffer);
unsigned char Write_Command_MMC(unsigned char *CMD);
unsigned char Read_CSD_MMC(unsigned char *Buffer);
unsigned char Read_CID_MMC(unsigned char *Buffer);
void MMC_get_volume_info(void);
unsigned char MMC_Start_Read_Sector(unsigned long sector);
void MMC_get_data(unsigned int Bytes,unsigned char *buffer);
void MMC_get_data_LBA(unsigned long lba, unsigned int Bytes,unsigned char *buffer);
void MMC_GotoSectorOffset(unsigned long LBA,unsigned int offset);
void MMC_LBA_Close();

	
//set MMC_Chip_Select to high (MMC/SD-Card Invalid)
//#define MMC_Disable() MMC_Write.MMC_Chip_Select=1;
#define MMC_Disable() SPI_CS_High;
//set MMC_Chip_Select to low (MMC/SD-Card Active)
//#define MMC_Enable() MMC_Write.MMC_Chip_Select=0;
#define MMC_Enable()	SPI_CS_Low;
//#define nop() #asm("nop"); //asm nop defined in CVAVR
#define nop() ;
#endif //_MMC_H_