main.c

SD卡的驱动识别

#include <string.h>
#include <stdio.h>
#include "Target\44blib.h"

#define  WR_sdram(addr,dat) 	*((volatile unsigned char *)(addr))=(unsigned char)dat
#define  RD_sdram(addr)		    *((volatile unsigned char *)(addr))	
#define  BEGINADDR   0x0c400000

/********************************************/
//   ARMSYS实验三：SDRAM 读写测试 
//   描述：对SDRAM进行操作                    
/********************************************/
	
void Main(void)
{
	char aa;
	int i,j,k,tmp;

	Port_Init();
	Uart_Init(0,115200);

	Led_Display(0xf);
	Delay(0);
	Beep(0x1);
	
	Uart_Select(0); //Select UART0//
	Uart_Printf("\n\n*************************************************************************");
	Beep(0x0);
	Uart_Printf("\n*                            立泰电子                                   *");
	Uart_Printf("\n*                          -SDRAM测试-                                  *");
	Uart_Printf("\n*                          Version 1.2                                  *");    
	Uart_Printf("\n*                     Email:[e-mail]                       *");
	Uart_Printf("\n*             UART Config--COM:115.2kbps,8Bit,NP,UART0                  *");
	Uart_Printf("\n*------------------Begin to Start SDRAM test,OK? (Y/N)--------------------*");
    
	Led_Display(0x0);
    aa= Uart_Getch();
	if((aa=='Y')||(aa=='y'))
	{
		Uart_Printf("\nBegin to write 0xc400000--0xc4000ff with 0--255");
		j=BEGINADDR;
		for(i=0;i<255;i++)
		{
	    	WR_sdram(j,i);
	    	j++;
	 	}
		j=BEGINADDR;
		k=0;
		for(i=0;i<255;i++)
		{
			if((tmp=RD_sdram(j))==i)
			   k++;
			j++;
	         }
		if(k==255)
			Uart_Printf("\nOK, Successfully!");
		else
		    Uart_Printf("\nFailed!");
		
	}
}