sd.h

avr+TFT+SD卡实现数码相框功能

//*****************************************************************************
//
// File Name	: 'sd.h'
// Title		: SD Flash Card Interface
// Author		: Andy Zhu - Copyright (C) 2008
// Created		: 2008.07.20
// Revised		: 2008.07.20
// Version		: 0.1
// Target MCU	: 
//
// Description	: This library offers some simple function which can be used
//		to read and write data on a MultiMedia or SecureDigital (SD) Flash
//		Card.  Although MM and SD Cards are designed to operate with their own
//		special bus wiring and protocols, both types of cards also provide a
//		simple SPI-like interface mode which is exceptionally useful when 
//		attempting to use the cards in embedded systems.
//
//		To work with this library, the card must be wired to the SPI port of
//		the Atmel microcontroller as described below.
//		  _________________
//		 /  1 2 3 4 5 6 78 |	<- view of MMC/SD card looking at contacts
//		/ 9                |	Pins 8 and 9 are present only on SD cards
//		|    MMC/SD Card   |
//		/\/\/\/\/\/\/\/\/\/
//
//		1 - CS   (chip select)			- wire to any available I/O pin(*)
//		2 - DIN  (data in, host->card)	- wire to SPI MOSI pin
//		3 - VSS  (ground)				- wire to ground
//		4 - VDD  (power, 3.3V only?)	- wire to power (MIGHT BE 3.3V ONLY!)
//		5 -	SCLK (data clock)			- wire to SPI SCLK pin
//		6 - VSS  (ground)				- wire to ground
//		7 - DOUT (data out, card->host)	- wire to SPI MISO pin
//*****************************************************************************
#ifndef __sd_h__
#define __sd_h__
// SD card chip select pin defines
#define SD_CS_PORT			PORTB
#define SD_CS_DDR			DDRB
#define SD_CS_PIN			PB6
#define ERROR				0xff

#define SD_CS_SELECT()		(SD_CS_PORT&=~(1<<SD_CS_PIN))
#define SD_CS_RELEASE()		(SD_CS_PORT|=(1<<SD_CS_PIN))

//SD commands
#define SD_GO_IDLE_STATE			0
#define SD_SEND_OP_COND				1
#define SD_SEND_CSD					9
#define SD_SEND_CID					10
#define SD_SEND_STATUS				13
#define SD_SET_BLOCKLEN				16
#define SD_READ_SINGLE_BLOCK		17
#define SD_WRITE_BLOCK				24
#define SD_PROGRAM_CSD				27
#define SD_SET_WRITE_PROT			28
#define SD_CLR_WRITE_PROT			29
#define SD_SEND_WRITE_PROT			30
#define SD_TAG_SECTOR_START			32
#define SD_TAG_SECTOR_END			33
#define SD_UNTAG_SECTOR				34
#define SD_TAG_ERASE_GROUP_START 	35
#define SD_TAG_ERARE_GROUP_END		36
#define SD_UNTAG_ERASE_GROUP		37
#define SD_ERASE					38
#define SD_APP_CMD					55
#define SD_READ_OCR					58
#define SD_CRC_ON_OFF				59
#define SD_SEND_SCR_APP				51

// R1 Response bit-defines
#define SD_R1_BUSY					0x80
#define SD_R1_PARAMETER_ERR			0x40
#define SD_R1_ADDRESS_ERR			0x20
#define SD_R1_ERASE_SEQ_ERR			0x10
#define SD_R1_COM_CRC_ERR			0x08
#define SD_R1_ILLEGAL_COM			0x04
#define SD_R1_ERASE_RESET			0x02
#define SD_R1_IDLE_STATE			0x01
//-----------------------------------------

typedef struct
{
	unsigned char OCR_3;
	unsigned char OCR_2;
	unsigned char OCR_1;
	unsigned char OCR_0;
}OCR_Reg;	//一般此四个值依次为0x80,0xff,0x80,0x00 代表Operatin Voltage 2.7V–3.6V 

typedef struct
{
	unsigned char MID;		//Manufacturer ID
	unsigned int  OID;		//OEM/Application ID
	unsigned char PNM[5];	//Product Name
	unsigned char PRV;		//Product Revision
	unsigned char PSN[4];	//Serial Numbe
	unsigned int  MDT;		//Manufacture Date Code
	unsigned char CID_CRC7;		//CRC7 checksum

}CID_Reg;

typedef struct
{
	unsigned char CSD_STRUCTURE;			//CSD structure 
	unsigned char TAAC;						//data read access-time-1 
	unsigned char NSAC;						//data read access-time-2 in CLK cycles
	unsigned char TRAN_SPEED;				//max. data transfer rate
	unsigned int  CCC;						//card command classes
	unsigned char READ_BL_LEN;				//max. read data block length
	unsigned char READ_BL_PARTIAL;			//partial blocks for read allowed
	unsigned char WRITE_BLK_MISALIGN;		//write block misalignment
	unsigned char READ_BLK_MISALIGN;		//read block misalignment
	unsigned char DSR_IMP;					//DSR implemented
	unsigned int  C_SIZE;					//device size
	unsigned char VDD_R_CURR_MIN;			//max. read current @VDD min
	unsigned char VDD_R_CURR_MAX;			//max. read current @VDD max
	unsigned char VDD_W_CURR_MIN;			//max. write current @VDD min
	unsigned char VDD_W_CURR_MAX;			//max. write current @VDD max
	unsigned char C_SIZE_MULT;				//device size multiplier
	unsigned char ERASE_BLK_EN;				//erase single block enable
	unsigned char SECTOR_SIZE ;				//erase sector size
	unsigned char WP_GRP_SIZE;				//write protect group size
	unsigned char WP_GRP_ENABLE;			//write protect group enable
	unsigned char R2W_FACTOR;				//write speed factor Binary MLC
	unsigned char WRITE_BL_LEN;				//max. write data block length 
	unsigned char WRITE_BL_PARTIAL;			//partial blocks for write allowed
	unsigned char FILE_FORMAT_GRP;			//File format group
	unsigned char COPY;						//copy flag (OTP)
	unsigned char PERM_WRITE_PROTECT;		//permanent write protection
	unsigned char TMP_WRITE_PROTECT;		//temporary write protection
	unsigned char FILE_FORMAT;				//File format
	unsigned char CSD_CRC7;					//CRC
}CSD_Reg;

typedef struct
{
	unsigned char SCR_STRUCTURE;			//SCR Structure
	unsigned char SD_SPEC;					//SD Card—Spec. Version
	unsigned char DATA_STAT_AFTER_ERASE;	//data_status_after erases
	unsigned char SD_SECURITY;				//SD Security Support
	unsigned char SD_BUS_WIDTHS;			//DAT Bus widths supported
}SCR_Reg;
//CID_Reg SD_CID_infor;

typedef struct
{
	//unsigned long int BLOCKNR;
	//unsigned int MULT;
	//unsigned int BLOCK_LEN;
	unsigned long int Capacity;	//SD卡总的容量（单位/字节）
	unsigned int size_MB;		//SD卡的容量（单位/兆）
	//unsigned int sector_count;	//SD卡总的扇区数

}VOLUME_INFO_TYPE;
//------------------------------------------
CID_Reg SD_CID_infor;
CSD_Reg SD_CSD_infor;
OCR_Reg SD_OCR_infor;
SCR_Reg SD_SCR_infor;
VOLUME_INFO_TYPE	SD_CAPACITY_infor;
//------------------------------------------

void SD_Init(void);	//
uint8_t SD_Reset(void);
uint8_t SD_SendCommand(uint8_t cmd, uint32_t arg);
uint8_t SD_Command(uint8_t cmd, uint32_t arg);
uint8_t Read_SD_Reg(uint8_t *buffer,uint8_t CMD,uint8_t length);
uint8_t SD_ReadSingleBlock(uint32_t sector, uint8_t *buffer);
//uint8_t SD_card_infor_read(uint8_t cmd,uint8_t *pt,uint8_t length);
//uint8_t READ_CID_Reg(CID_Reg *buf);
void Get_SD_card_CID_Infor(unsigned char *tag_buf);
void Get_SD_card_CSD_Infor(unsigned char *tag_buf);
void Get_SD_card_OCR_Infor(unsigned char *tag_buf);
void Get_SD_card_SCR_Infor(unsigned char *tag_buf);
void Get_SD_card_Volume_Infor(void);
//-------------------------------------------




#endif	//----------------------------