4-1f.c

8051单片机学习源码 包括定时器、键盘、液晶显示等

#include<reg52.h>
#define uchar unsigned char
#define uint unsigned int
uchar count;
uint disnum;
sbit dula=P2^6;
sbit wela=P2^7;
uchar code tabledu[]={
0x3f,0x06,0x5b,0x4f,
0x66,0x6d,0x7d,0x07,
0x7f,0x6f,0x77,0x7c,
0x39,0x5e,0x79,0x71};
display(uchar,uchar,uchar);
delay(uchar);
void main()
{
	EA=1;
	ET1=1;
	TMOD=0x10;
	TH1=(65536-10000)/256;
	TL1=(65536-10000)%256;
	TR1=1;
	while(1)
		{
			if(count==1)
				{	
				  count=0;
				 // if(disnum==1000)
				//	disnum=0;
				  disnum++; 
				}
	        display(disnum/100,disnum%100/10,disnum%100%10);	
		}
}

void tim1() interrupt 3 using 3
{
	TH1=(65536-10000)/256;
	TL1=(65536-10000)%256;
	count++;
}

display(uchar bai,uchar shi,uchar ge)
{

	P0=~tabledu[bai];
	dula=1;
	dula=0;
	P0=0x01;
	wela=1;
	wela=0;
	delay(1);

	P0=~tabledu[shi];
	dula=1;
	dula=0;
	P0=0x02;
	wela=1;
	wela=0;
	delay(1);

	P0=~tabledu[ge];
	dula=1;
	dula=0;
	P0=0x04;
	wela=1;
	wela=0;
	delay(1);
}
delay(uchar x)
{
	uchar a,b;
	for(a=x;a>0;a--)
		for(b=255;b>0;b--);	
}