51程序红外模块检测有红外线后（人或动物出现）蜂鸣器报警，数码管显示倒计时停止报警（附加原理图）

#include <reg52.h> #define u8 unsigned char #define u16 unsigned int #define Dla P1 //数码管段 u8 TIME=0; //=20,计时 1 s u8 TIMES=0; //=1, 计时 1 s u8 TIMEM=0; //=1, 计时 1 min sbit Wla1 = P0^2; //数码管位 sbit Wla2 = P0^3; //数码管位 sbit Beep = P3^6; //Beep sbit Din = P3^4; //Din sbit Led = P3^5; //Led u8 code table[16]={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f,0x77,0x7c,0x39,0x5e,0x79,0x71}; //0-F 编码 void display(u8 time);//显示time void Delayms(u8 ms); //延时ms毫秒 void TimerInit(void); //定时器初始化 void main() { TimerInit(); while(1) { if(Din) { TR0=1; //启动定时器0 Led=0; Beep=0; } else { Led=1; TR0=0; //关闭定时器0 Beep=1; TIMES=0; } display(TIMES); //显示 } } void TimerInit(void) { TMOD=0x11; //GATE C/T M0 M1 GATE C/T M0 M1 TH0=(65536-50000)/256; //50MS初值 TL0=(65536-50000)%256; //50MS初值 EA=1; ET0=1; TR0=0; } void display(u8 time) { u8 shi=0,ge=0; shi=time/10; ge=time%10; Wla2=1; Dla=~table[shi]; Delayms(1); Wla2=0; Dla=0xFF; Wla1=1; Dla=~table[ge]; Delayms(1); Wla1=0; Dla=0xFF; } void Delayms(u8 ms) { u8 i=0; for(i=0;i<ms;i++) { TH1=(65536-1000)/256; //1MS初值 TL1=(65536-1000)%256; TR1=1; while(!TF1); TF1=0; } TR1=0; } void timer0() interrupt 1 { TH0=(65536-50000)/256; TL0=(65536-50000)%256; TIME++; if(TIME==20) { TIME=0; TIMES++; if(TIMES==60) { TIMEM++; if(TIMEM==60) TIMEM=0; } } }