ram62256.c

22个51单片机的实例

#include <reg51.h>
#include <absacc.h>
#define ramaddress  XBYTE[0X0000]
unsigned char sum;
void main()
{
	unsigned char xdata *pt;
	unsigned char i,sumtemp;
	pt=&ramaddress;
	P1=0x0f;
	for(i=0;i<20;i++)
	{
		*(pt+i)=i+1;
	}
	sum=0;
	for(i=0;i<20;i++)
	{
		sumtemp=*(pt+i);
		sum=sum+sumtemp;
	}
	P1=sum;
}