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SD Card 的代码
sd.eww
$WS_DIR$\SD.ewp
sd.lst
C51 COMPILER V7.06 SD 03/06/2010 17:37:23 PAGE 1
C51 COMPILER V7.06, COMPILATION OF MODULE SD
OBJECT MODULE PLACED IN sd.O
sd.c
#include "spi.h"
#include "sd.h"
/*-------------------------------------------------------------------------------------------------*/
unsigned char SD_init(void)
{
unsigned char response = 0xff
sd.h
#ifndef _SD_H_
#define _SD_H_
/*命令宏*/
#define CMD0 (0x40+0) /* GO_IDLE_STATE */
#define CMD1 (0x40+1) /* SEND_OP_COND */
#define ACMD41 (0xC0+41) /* SEND_OP_COND */
#define CMD8 (0x40+8) /* SE
sd.h
#define SD_CS_H GPIOA->BSRR=1
sd.c
#include "sd.h"
extern SPI_InitTypeDef SPI_InitStructure;
void FCLK_SLOW() /*set SPI clk