daojishi.rar_site:www.pudn.com_红绿灯倒计时

#include "NEW_8051.H" #include<intrins.h> void sysinit(void); void display(void); void keyread(); sbit K_green=P1^6; //绿灯计时 sbit K_red=P1^7; //红灯计时 sbit OUT_red=P3^3; //红灯输出 sbit OUT_green=P3^4; //绿灯输出 unsigned char timea,timeb; bit k_redbit,k_greenbit; bit refh595; bit rcler,gcler; bit clerr,clerg; bit startr,startg; bit gettime_R,gettime_G; bit dec_R,dec_G; int time_red; int time_green; int rtime,gtime; void main() { sysinit(); while(timea<99); while(1) { keyread(); display(); } } void sysinit(void) { // SCON =0x58; //选择串口工作方式，打开接收允许 TMOD =0x21; //定时器1工作在方式2，定时器0工作在方式1 // TH1 =0xF3; //实现波特率9600（系统时钟33.8688MHZ） // TR1 =1; //启动定时器T1 ET1 =0; TR0=1; TH0=0xd8; TL0=0xf0; ET0=1; // ES=1; //允许串行口中断 //PS=1; //设计串行口中断优先级 EA =1; timea=0; timeb=0; time_red=0; //单片机中断允许 time_green=0; K_red=1; K_green=1; k_redbit=0; OUT_red=1; OUT_green=1; k_greenbit=0; refh595=0; rcler=0; gcler=0; clerr=0; clerg=0; startr=0; startg=0; gettime_R=0; gettime_G=0; dec_R=0; dec_G=0; } void temer0(void)interrupt 1 { WDT_CONTR=0x3C; TH0=0xd8; TL0=0xf0; refh595=1; timea++; timeb++; } void keyread() { if(!K_green&&K_red) startr=1; if(!K_red&&K_green) startg=1; /////////////////////////////////////// if(startr) { if((k_redbit==0)&&(K_red==0)) { if(rcler==0) { rcler=1; timea=0; time_red=0; } if(timea>=100) { time_red++ ; timea=0; } } if((K_green==0)&&(K_red==1)&&(time_red>0)&&(k_redbit==0)&&rcler) { k_redbit=1; if(timea>50) {time_red++;} rtime=time_red; timea=0; } if((k_redbit==1)&&(K_red==0)&&(K_green)) { if(!gettime_G) { gettime_G=1; if((gtime>1)&&dec_G){IAP_CONTR=0x20;} gtime=time_green; clerg=0; } if(clerr==0) { clerr=1; timea=0; } if(timea>=100) { rtime--; if(rtime<0){IAP_CONTR=0x20;} dec_R=1; gettime_R=0; timea=0; } } } //////////////////////////////////////////////////////////////// if(startg) { if((k_greenbit==0)&&(K_green==0)) { if(gcler==0) { gcler=1; timeb=0; time_green=0; } if(timeb>=100) { time_green++; timeb=0; } } if((K_green==1)&&(K_red==0)&&(time_green>0)&&(k_greenbit==0)&&gcler) { k_greenbit=1; if(timeb>50) {time_green++;} gtime=time_green; timeb=0; } if((k_greenbit==1)&&(K_green==0)&&(K_red)) { if(!gettime_R) { gettime_R=1; if((rtime>1)&& dec_R){IAP_CONTR=0x20;} rtime=time_red; clerr=0; } if(clerg==0) { clerg=1; timeb=0; } if(timeb>=100) { gtime--; if(gtime<0){IAP_CONTR=0x20;} dec_G=1; gettime_G=0; timeb=0; } } } }