sd.h

sd卡驱动程序来源于菲斯卡尔官方网站‘ 8位单片机

/******************************************************************************
*                                                  
*  (c) copyright Freescale Semiconductor 2008
*  ALL RIGHTS RESERVED
*
*  File Name:   SD.h
*                                                                          
*  Description: Header File for SD using SPI Driver 
*                                                                                     
*  Assembler:   Codewarrior for HC(S)08 V6.1
*                                            
*  Version:     1.0                                                         
*                                                                                                                                                         
*  Author:      Jose Ruiz (SSE Americas)
*                                                                                       
*  Location:    Guadalajara,Mexico                                              
*                                                                                                                  
*                                                  
* UPDATED HISTORY:
*
* REV   YYYY.MM.DD  AUTHOR        DESCRIPTION OF CHANGE
* ---   ----------  ------        --------------------- 
* 1.0   2008.02.18  Jose Ruiz     Initial version
* 
******************************************************************************/                                                                        
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/*****************************************************************************/


#ifndef __SD__
#define __SD__

/* Includes */
#include "FslTypes.h"

/************************* HIL ****************************/
/**********************************************************/
/* Includes */
#include "SPI.h"     // SPI Driver

/* HIL */
#define InitSPI         SPI_Init
#define ReadSPIByte     SPI_Receive_byte
#define WriteSPIByte    SPI_Send_byte
#define HighSpeedSPI    SPI_High_rate
/**********************************************************/
/**********************************************************/

/* User definitions */
#define SD_BLOCK_512     
#define SD_WAIT_CYCLES 10

/* SD card Inserted detection Pin */
#define SD_PRESENT      PTBD_PTBD7
#define _SD_PRESENT     PTBDD_PTBDD7

/* Error Codes */
enum
{
	OK,
	COMMAND_FAILS,
	INIT_FAILS,
	WRITE_COMMAND_FAILS,
	WRITE_DATA_FAILS,
	READ_COMMAND_FAILS,
	READ_DATA_FAILS,
	NO_SD_CARD
};

/* Status */
enum
{
    SD_OK,
    SD_IDLE
};

/* TypeDefs */
typedef union
{
	UINT8 bytes[4];
	UINT32 lword;		
}T32_8;

/* Stardar Definitions */
#ifdef  SD_BLOCK_512
    #define SD_BLOCK_SIZE   (0x00000200)
    #define SD_BLOCK_SHIFT  (9)
    #define BLOCK_SIZE      512
#endif


/* Static Definitions */
/******************************* SD Card Standard Commands **********************************/
enum{
  SD_CMD0,  /* Resets the SD Memory Card */
  SD_CMD1,  /* Sends host capacity support information and activates the card's 
               initialization process. HCS is effective when card receives SEND_IF_COND 
               command. Reserved bits shall be set to '0'. */
  SD_CMD2,
  SD_CMD3,
  SD_CMD4,
  SD_CMD5,  
  SD_CMD6,  /* Checks switchable function (mode 0) and switches card function (mode 1).*/
  SD_CMD7,
  SD_CMD8,  /* Sends SD Memory Card interface condition that includes host supply voltage 
               information and asks the accessed card whether card can operate in supplied 
               voltage range. Reserved bits shall be set to '0'.*/
  SD_CMD9,  /* Asks the selected card to send its cardspecific data (CSD)*/
  SD_CMD10, /* Asks the selected card to send its card identification (CID) */
  SD_CMD11,
  SD_CMD12, /* Forces the card to stop transmission in Multiple Block Read Operation */
  SD_CMD13, /* Asks the selected card to send its status register. */
  SD_CMD14,
  SD_CMD15,
  SD_CMD16, /* Sets a block length (in bytes) for all following block commands (read and
               write) of a Standard Capacity Card. Block length of the read and write 
               commands are fixed to 512 bytes in a High Capacity Card. The length of 
               LOCK_UNLOCK command is set by this command in both capacity cards.*/
  SD_CMD17, /* Reads a block of the size selected by the SET_BLOCKLEN command.*/
  SD_CMD18, /* Continuously transfers data blocks from card to host until interrupted by a
               STOP_TRANSMISSION command.*/
  SD_CMD19, 
  SD_CMD20,
  SD_CMD21,
  SD_CMD22,
  SD_CMD23,
  SD_CMD24, /* Writes a block of the size selected by the SET_BLOCKLEN command. */
  SD_CMD25, /* Continuously writes blocks of data until 扴top Tran