基于8051实现的电子时钟(Version1.0)

女爷i 2021-12-05 15:23 248阅读 0赞

本程序实现了基本的电子时钟功能, 初始时间为23:59:55.

#include <STC89C5xRC.H>
    
    unsigned char code DIG_CODE[10] = {0x3f, 0x06, 0x5b, 0x4f, 0x66, 0x6d, 0x7d, 0x07, 0x7f, 0x6f};//对应数码管显示0~9
    
    int tcount = 0;//记录经过的2ms区间段个数
    
    int hour = 23, minute = 59, second = 55;
    
    void T0_INT() interrupt 1 //timer0中断, 每2ms触发一次
    {
    	TR0 = 0;//关闭timer0
    	TH0 = 0xF8;
    	TL0 = 0x30;//65536 - 2000 = 63536 = F830H
    	if(tcount % 6 == 0)
    	{
    		//秒数个位
    		P2 = 0;//右数第一个数字亮
    		P0 = DIG_CODE[second % 10];
    		tcount ++;
    	}
    	else if(tcount % 6 == 1)
    	{
    		//秒数十位
    		P2 = 1 << 2;//右数第二个数字亮
    		P0 = DIG_CODE[second / 10];
    		tcount ++;
    	}
    	else if(tcount % 6 == 2)
    	{
    		//分钟个位
    		P2 = 2 << 2;
    		P0 = DIG_CODE[minute % 10];
    		tcount ++;
    	}
    	else if(tcount % 6 == 3)
    	{
    		//分钟十位
    		P2 = 3 << 2;
    		P0 = DIG_CODE[minute / 10];
    		tcount ++;
    	}
    	else if(tcount % 6 == 4)
    	{
    		//小时个位
    		P2 = 4 << 2;
    		P0 = DIG_CODE[hour % 10];
    		tcount ++;
    	}
    	else if(tcount % 6 == 5)
    	{
    		//小时十位
    		P2 = 5 << 2;
    		P0 = DIG_CODE[hour / 10];
    		tcount ++;
    	}
    	if(tcount == 500)//2ms * 500 = 1000ms = 1s -> 1s时间到
    	{
    		tcount = 0;
    		second ++;
    		if(second == 60)
    		{
    			second = 0;
    			minute ++;
    			if(minute == 60)
    			{
    				minute = 0;
    				hour ++;
    				if(hour == 24)
    				{
    					hour = 0;
    				}
    			}
    		}
    	}
    	TR0 = 1;//重新开启timer0
    }
    
    int main()
    {
    	P2 = 111 << 2;
    	P0 = 0;//数码管全灭
    	TMOD = 0x01;
    	TH0 = 0xF8;
    	TL0 = 0x30;
    	IE = 0x82;
    	TR0 = 1;//开启timer0
    	while(1)
    	{
    		;
    	}
    	return 0;
    }

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