led_check.c

C8051F020串口与计算机通信的编程

#include<reg51.h>
#define uchar unsigned char
char code tab[]={0x88,0x83,0xC6,0xA1,0xF9,0xA4,0xB0,0x99};
void timer(uchar);
sbit P0_0=P0^0;
main()
{uchar i,a=3;
 SCON=0;
 for(;;)
 {	P0_0=1;
 	for(i=0;i<4;i++)
	{
	 SBUF=tab[a];
	 a--;
	 while(!TI);
	 TI=0;
	 if(a==255) a=7;
	}							   
	P0_0=0;
	timer(100);
 }
}
void timer(uchar t)
{	uchar i;
	for(i=0;i<t;i++)
	{	TMOD=0x01;
		TH0=10000/256;
		TL0=10000%256;
		TR0=1;
		while(!TF0);
		TF0=0;
	}
}