esram.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"

int write_esram(U32 addr, U32 size, U32 bit)
{
	U32 temp32 = 0;
	U16 temp16 = 0;
	U8 temp8 = 0;
	switch(bit){
	U32 i;
	case 8:
		for(i = 0; i < size; i++, temp8++) *(U8 *)(addr + i) = 0x5a;
		break;
	case 16:
	 	for(i = 0; i < size; i++, temp16++) *(U16 *)(addr + i * 2)= 0x5a5a;
		break;
	case 32:
		for(i = 0; i < size; i++, temp32++) *(U32 *)(addr + i * 4) = 0x5a5a5a5a;
		break;
	}
	
	#if 0
	__asm{
		cmp bit, #8
	8
	16
	32
	}
	#endif
}

static U32 esramadd = 0x1fff2800;
	
void read_esram(U32 src, U32 size, U32 bit)
{
	U32 temp32;
	U16 temp16;
	U8  temp8;
	switch(bit){
	U32 i;
	case 8:
		for(i = 0; i < size; i++, temp8++) *(U8 *)(esramadd + i) = *(U8 *)(src + i);
		break;
	case 16:
	 	for(i = 0; i < size; i++, temp16++) *(U16 *)(esramadd + i * 2)= *(U16 *)(src + i * 2);
		break;
	case 32:
		for(i = 0; i < size; i++, temp32++) *(U32 *)(esramadd + i * 4) = *(U32 *)(src + i * 4);
		break;
	}
}    

void esram()
{
	write_esram(0x1fff0000, 0xa00, 32); /* write full esram */
	read_esram(0x1fff0000, 0xa00, 32);
	compare(0x1fff0000, 0x1fff2800, 0xa00, 32);
}