pc2mcu.c

C8051F020串口与计算机通信的编程

#include<reg51.h>
#define uchar unsigned char 
#define SL
AVE 0xF1
uchar receive();
void send();	
void delay();
uchar p;
main()
{	TMOD=0x20;
	TH1=TL1=0xE5;
	PCON=0x00;			   //smod=0
	TR1=1;
	SCON=0x70;
	P0=0xFE;
	while(1)
	{	p=receive();
		switch(p)
		{	case 1: P1=0xC0;break;
			case 2: P1=0xF9;break;
			case 3: P1=0xA4;break;
			case 4: P1=0xB0;break;
			case 5: P1=0x99;break;
			case 6: P1=0x92;break;
			case 7: P1=0x82;break;
			case 8: P1=0xF8;break;
			default:   P1=0x00;break;
		}
		delay();
	}
}
uchar receive()
{
	while(RI!=0);
	RI=0;
	p=SBUF;
	return(p);
}
void delay()
{	uchar i,j,k;
	for(i=500;i>0;i--)
	for(j=500;j>0;j--)
	for(k=500;k>0;k--);
}