- #include "reg52.h" //根據實驗程序秒表改的
- typedef unsigned int u16;
- typedef unsigned char u8;
- sbit LSA=P2^2;
- sbit LSB=P2^3;
- sbit LSC=P2^4;
- sbit red=P2^7;
- sbit yellow=P2^6;
- sbit green=P2^5;//三個LED分別表示紅黃綠
- u8 code smgduan[17]={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f,0x77,0x7c,0x39,0x5e,0x79,0x71};//顯示0~F的值
- u8 ssec,sec;
- u8 DisplayData[2];
- void delay(u16 i)
- {
- while(i--);
- }
- void Timer0Init() //定時器初始化
- {
- TMOD|=0x01;
- TH0=0xd8;
- TL0=0xf0; //10ms
- ET0=1;
- EA=1;
- TR0=1;
- }
- void DigDisplay()
- {
- u8 i;
- for(i=0;i<2;i++)
- {
- switch(i)
- {
- case(0):LSA=0;LSB=0;LSC=0;break;
- case(1):LSA=1;LSB=0;LSC=0;break;
- }
- P0=DisplayData[i];
- delay(100);
- P0=0x00;
- }
- }
- void Timer0() interrupt 1
- {
- TH0=0xd8;
- TL0=0xf0;
- ssec++;
- if(ssec>=100)
- {
- ssec=0;
- sec++;
- if(sec>=0&&sec<=10) //紅燈點亮，同時倒計時10s
- {
- red=0;
- yellow=1;
- green=1;
- }
- if(sec>=11&&sec<=15) //黃燈閃爍，同時倒計時5s
- {
- red=1;
- yellow=~yellow;
- green=1;
- }
- if(sec>=16&&sec<=25) //綠燈點亮，同時倒計時10s
- {
- red=1;
- yellow=1;
- green=0;
- }
- if(sec>25) //sec置0，實現循環
- {
- red=0;
- yellow=1;
- green=1;
- sec=0;
- }
- }}
- void datapros()
- {
- if(sec>=0&&sec<=10)
- {
- DisplayData[0]=smgduan[(10-sec)%10]; //紅燈倒計時
- DisplayData[1]=smgduan[(10-sec)/10];
- }
- if(sec>=11&&sec<=15)
- {
- DisplayData[0]=smgduan[(15-sec)%10]; //黃燈倒計時
- DisplayData[1]=smgduan[(15-sec)/10];
- }
- if(sec>=16&&sec<=25)
- {
- DisplayData[0]=smgduan[(25-sec)%10]; //綠燈倒計時
- DisplayData[1]=smgduan[(25-sec)/10];
- }
- }
- void main()
- {
- Timer0Init();
- while(1)
- {
- datapros();
- DigDisplay();
- }
- }
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