基于C51实现的定时器控制交通指示灯.zip

/*************** writer:shopping.w ******************/ #include <reg52.h> #define uint unsigned int #define uchar unsigned char sbit RED_A = P0^0; sbit YELLOW_A = P0^1; sbit GREEN_A = P0^2; sbit RED_B = P0^3; sbit YELLOW_B = P0^4; sbit GREEN_B = P0^5; uchar Time_Count = 0,Flash_Count = 0,Operation_Type = 1; void T0_INT() interrupt 1 { TH0 = -50000/256; TL0 = -50000%256; switch(Operation_Type) { case 1: RED_A=0;YELLOW_A=0;GREEN_A=1; RED_B=1;YELLOW_B=0;GREEN_B=0; if(++Time_Count != 100) return; Time_Count=0; Operation_Type = 2; break; case 2: if(++Time_Count != 8) return; Time_Count=0; YELLOW_A=!YELLOW_A; GREEN_A=0; if(++Flash_Count != 10) return; Flash_Count=0; Operation_Type = 3; break; case 3: RED_A=1;YELLOW_A=0;GREEN_A=0; RED_B=0;YELLOW_B=0;GREEN_B=1; if(++Time_Count != 100) return; Time_Count=0; Operation_Type = 4; break; case 4: if(++Time_Count != 8) return; Time_Count=0; YELLOW_B=!YELLOW_B; GREEN_B=0; if(++Flash_Count !=10) return; Flash_Count=0; Operation_Type = 1; break; } } void main() { TMOD = 0x01; IE = 0x82; TR0 = 1; while(1); }