flash.c

S3C44B0的板子上实现FLASH烧写的源码

#include "def.h"
#include "flash.h"
 


void wait(void)
{
	U16 old,flashstatus;
	volatile int i;
	old=RE(0);//get data form anywhere
	while(1)
	{
		flashstatus=RE(0);//check DQ6 to see whether programing has completed
		if((old&0x40)==(flashstatus&0x40))
		break;
	}
}
	

void Sst_Erase_Chip(void)
{

	WR(0x5555,0xaa);
	WR(0x2aaa,0x55);
	WR(0x5555,0x80);
	WR(0x5555,0xaa);
	WR(0x2aaa,0x55);
	WR(0x5555,0x10);
	
	wait();
}

void Sst_Word_Prog(U32 addr,U16 data)
{
	
	WR(0x5555,0xaa);
	WR(0x2aaa,0x55);
	WR(0x5555,0xa0);
	WR(addr,data);
	
	wait();
}