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- /*************** 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);
- }
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