【单片机】定时炸弹倒计时

#include <reg52.h>
#include "./delay/delay.h"
 
#define TIMEPORT P0
 
sbit bit_select = P2^0;
sbit seg_select = P2^1;
sbit beep = P2^2;
 
code unsigned char timedata[10] = {0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f};
code unsigned char bitdata[8] = {0xfe,0xfd,0xfb,0xf7,0xef,0xdf,0xbf,0x7f};
unsigned disdata[8];
 
unsigned char ms = 1;
unsigned char sec = 10;
unsigned char min = 0;
 
void timer0_init();
void timer1_init();
void display();
void change_time();
 
void main()
{
    unsigned char i;
	unsigned char cont;
    timer0_init();
	timer1_init();
	
	while(1)
	{
	    for(cont = 9; cont > 0; cont--)
		{
		    if(cont == sec && 99 == ms)
			{
			    for(i = 0; i < 200; i++)
				{
					beep = ~beep;
					delay_us(100);
				}
			}
		}
		
		if(0 == sec)
		{
		    for(i = 0; i < 200; i++)
			{
			    beep = ~beep;
				delay_us(200);
			}
		}
	}
}
 
/*
===================
功能：初始化中断0
===================
*/
void timer0_init()
{
    EA = 1;
	TMOD |= 0x01;
	TH0 = (65536 - 1000) / 256;
	TL0 = (65536 - 1000) % 256;
	ET0 = 1;
	TR0 = 1;
}
 
/*
===================
功能：初始化中断1
===================
*/
void timer1_init()
{
    EA = 1;
	TMOD |= 0x10;
	TH1 = (65536 - 2000) / 256;
	TL1 = (65536 - 2000) % 256;
	ET1 = 1;
	TR1 = 1;
}
 
/*
==========================
功能：中断1服务函数，显示
==========================
*/
void timer1_isr() interrupt 3
{
	TH1 = (65536 - 2000) / 256;
	TL1 = (65536 - 2000) % 256;
 
    display();    
}
 
/*
==========================
功能：中断0服务函数，计数
==========================
*/
void timer0_isr() interrupt 1
{
    static unsigned char i = 0;
	
	TH0 = (65536 - 1000) / 256;
	TL0 = (65536 - 1000) % 256;
 
    i++;
	
    if(10 == i)
	{
	    i = 0;
        ms--;
 
        if(0 == ms)
        {
	        ms = 99;
		    sec--;
		
            if(0 == sec)
		    {
		        sec = 0;
				ms = 0;
				TR0 = 0;
		    }
		}
	}
 
    change_time();    //修改显示时间
}
 
/*
======================
功能：修改时间显示值
======================
*/
void change_time()
{
    disdata[0] = timedata[min / 10];
    disdata[1] = timedata[min % 10];
	disdata[2] = 0x40;
	disdata[3] = timedata[sec / 10];
    disdata[4] = timedata[sec % 10];
	disdata[5] = 0x40;
	disdata[6] = timedata[ms / 10];
    disdata[7] = timedata[ms % 10];  
}
 
/*
==========================
功能：动态扫描，显示数据
==========================
*/
void display()
{
    static unsigned char i = 0;
	
    TIMEPORT = 0x00;            //清空数据，防止重影
    seg_select = 1;
    seg_select = 0;
 
    TIMEPORT = 0xff;            //清空数据，防止重影
    bit_select = 1;
    bit_select = 0;
 
    TIMEPORT = disdata[i];      //取出显示值
    seg_select = 1;
    seg_select = 0;
 
    TIMEPORT = bitdata[i];      //取出位码
    bit_select = 1;
    bit_select = 0;	
	
	i++;
	if(8 == i)
	{
	    i = 0;
	}
}