單片機(jī)8255交通燈程序

交通燈程序/***********************************************************十字路口交通燈控制C程序***********************************************************/#include<reg51.h>#define uchar unsignedchar#define uint unsignedint/*****定義控制位*******************************************/sbitTime_Show_LED2=P2^5;//Time_Show_LED2(直行時(shí)間顯示)控制位sbitTime_Show_LED1=P2^4;//Time_Show_LED1(直行時(shí)間顯示)控制位sbitEW_LED2=P2^3; //EW_LED2控制位sbitEW_LED1=P2^2; //EW_LED1控制位sbitSN_LED2=P2^1; //SN_LED2控制位sbitSN_LED1=P2^0; //SN_LED1控制位sbitSN_Yellow=P1^6;//SN黃燈sbitEW_Yellow=P1^2;//EW黃燈sbitEW_ManGreen=P3^0;//EW人行道綠燈sbitSN_ManGreen=P3^1;//SN人行道綠燈sbitSpecial_LED=P2^6;//交通特殊指示燈sbitBusy_LED=P2^7;//交通繁忙指示燈sbitNomor_Button=P3^5;//交通正常按鍵sbitBusy_Btton=P3^6;//交通繁忙按鍵sbitSpecial_Btton=P3^7;//交通特殊按鍵sbitEW_ManRed=P3^3;//EW人行道紅燈sbitSN_ManRed=P3^4;//SN人行道紅燈bitFlag_SN_Yellow;//SN黃燈標(biāo)志位bitFlag_EW_Yellow;//EW黃燈標(biāo)志位charTime_EW;//東西方向倒計(jì)時(shí)單元charTime_SN;//南北方向倒計(jì)時(shí)單元ucharEW=60,SN=40,EWL=19,SNL=19;//程序初始化賦值，正常模式ucharEW1=60,SN1=40,EWL1=19,SNL1=19;//用于存放修改值的變量ucharcodetable[10]={0x3F,0x06,0x5B,0x4F,0x66,0x6D,0x7D,0x07,0x7F,0x6F};//0-9段選碼ucharcodeS[8]={0x28,0x48,0x18,0x48,0x82,0x84,0x81,0x84};//交通信號(hào)燈控制代碼/**********************延時(shí)子程序**************************/voidDelay(uchara){ uchar i; i=a; while(i--){;}}/*****************顯示子函數(shù)******************************/voidDisplay(void){ ucharh,l; h=Time_EW/10; l=Time_EW%10; P0=table[l]; EW_LED2=1; //點(diǎn)亮EW_LED2 Delay(2); EW_LED2=0;//熄滅EW_LED2 P0=table[h]; EW_LED1=1;//點(diǎn)亮EW_LED1 Delay(2); EW_LED1=0; h=Time_SN/10; l=Time_SN%10; P0=table[l]; SN_LED2=1;//點(diǎn)亮SN_LED2 Delay(2); SN_LED2=0; P0=table[h]; SN_LED1=1; //點(diǎn)亮SN_LED1 Delay(2); SN_LED1=0; h=EW1/10; l=EW1%10; P0=table[l]; Time_Show_LED1=1; //點(diǎn)亮Time_Show_LED1 Delay(2);Time_Show_LED1=0; P0=table[h]; Time_Show_LED2=1; //點(diǎn)亮Time_Show_LED2 Delay(2); Time_Show_LED2=0;}/**********************外部0中斷服務(wù)程序******************/voidINT0_srv(void)interrupt0using1{ EX0=0;//關(guān)中斷 P1=S[4]; //EW通行，SN紅燈 Display(); } /*******S5狀態(tài)**********/ P1=0X00; while(Time_EW>=0) {Flag_EW_Yellow=1;//EW開黃燈信號(hào)位P1=P1|0x80;//保持SN紅燈Display(); } /*******S6狀態(tài)**********/SN_ManRed=1;//SN人行道禁止SN_ManGreen=0;EW_ManRed=1; //EW人行道禁止EW_ManGreen=0;Flag_EW_Yellow=0;//EW關(guān)黃燈顯示信號(hào)Time_EW=EWL;while(Time_EW>=5) {P1=S[6];//EW左拐綠燈亮，SN紅燈Display(); } /*******S7狀態(tài)**********/ P1=0X00; while(Time_EW>=0)