sdram.c

基于东南大学开发的SEP3203的ARM7中的所有驱动

#include "hardware.h"
#include "hardware_reg.h"
#include "HA_typedef.h"
#include <stdio.h>

extern U32 para;

static void SDRAM_FullWrite32(U32 dest, U32 size, U32 bit)
{
	U32 i;
     for(i=0; i <size/4; i++)
	 *(RP)(dest+i*4) = (0xAAA80000 | i);
}
	
static void SDRAM_FullRead32(U32 dest, U32 size, U32 bit)
{
	U32	i;
	 for(i=0; i <size/4; i++) {
	 	if(*(RP)(dest+i*4)!= (0xAAA80000 | i))
			printf("%x\n", (dest + i * 4 ));
		}
		
}

ER SDRAM32(void)
{
    SDRAM_FullWrite32(0x30000000, 0x0800000, 8); /* write full size of sdram */
	printf("32 bits write finish!\n");
	SDRAM_FullRead32(0x30000000, 0x0800000, 8);
	return 0;
}

//////////////////////////////////////////////

/* Test in 16 bits*/
static void SDRAM_FullWrite16(U32 dest, U32 size, U32 bit)
{
	U32 i;
     for(i=0; i <size/2 ; i++)
	 *(RP16)(dest+i*2) =(U16)(0xffff&i);
}
	
static void SDRAM_FullRead16(U32 dest, U32 size, U32 bit)
{	
U32	i;
	 for(i=0; i <size/2 ; i++) {
	 	if( *(RP16)(dest+i*2) != (U16)(0xffff&i)) {
			printf("%x\n", (dest + i * 2 ));
		}
	}
		
}

ER SDRAM16(void)
{
    SDRAM_FullWrite16(0x30000000, 0x1000000, 8); /* write full size of sdram */
	printf("16 bits write finish!\n");
	SDRAM_FullRead16(0x30000000, 0x1000000, 8);
	return 0;
}