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- #include<reg51.h>
- sbit Key_UP=P1^0;
- sbit Key_DOWN=P1^1;
- unsigned char KeyV,TempKeyV;
- sbit P25=P2^0;//數(shù)碼管第1位
- sbit P26=P2^1;//數(shù)碼管第2位
- sbit gang=P2^2;//分鐘與秒的間隔符
- sbit P27=P2^3;//數(shù)碼管第4位
- sbit P28=P2^4;
- sbit qian=P1^4;
- sbit bai=P1^5;
- sbit JDQ=P3^7;//繼電器
- unsigned int js;
- unsigned int ds,x,y;//倒計時初始時間,加時，減時
- unsigned char jsflag;
- static unsigned int i;
- unsigned char code LEDDis[]={0xC0,0xF9,0xA4,0xB0,0x99,0x92,0x82,0xF8,0x80,0x90,0xFF,0xBF};
- void Delay(unsigned int ii) //1MS
- {
- unsigned int jj;
- for(;ii>0;ii--)
- for(jj=0;jj<125;jj++)
- {;}
- }
- void main()
- {
- EA = 1; //允許CPU中斷
- ET0 = 1; //定時器0中斷打開
- ET1=1; //定時器1中斷打開
- TMOD = 0x11; //設定時器0 1為模式1，16位模式
- TH0=0xB8;
- TL0=0x00; //設定時值為（20ms）
- TH1=0xdc; //設定時值為（10ms）
- TL1=0x00;
- TR0 = 1;
- TR1=1;
- ds=9999;
- KeyV = 0;
- TempKeyV = 0;
- jsflag=0;
- while(1);
- }
- //定時器0中斷外理中鍵掃描和顯示
- void Key_Time0(void) interrupt 1 using 2
- {
- TH0=0xB8;
- TL0=0x00; //設定時值為20000us（20ms)
- if (!Key_UP)
- KeyV = 1;
- if (!Key_DOWN)
- KeyV = 2;
- if (KeyV!= 0) //有鍵按下
- {
- Delay(10); //延時防抖 按下10ms再測
- if (!Key_UP)
- TempKeyV = 1;
- if (!Key_DOWN)
- TempKeyV = 2;
- if (KeyV == TempKeyV) //兩次值相等為確定接下了鍵
- {
- if (KeyV == 1)
- {
- jsflag=0;
- if(ds==0)
- {
- ds=6000;
- }
- js=js+1;
- JDQ=0; //繼電器吸合
-
- if(js==50)
- {
- js=0;
- ds=ds-1;
-
- }
- }
- if(KeyV==2)
- {
- jsflag=1;
- }
- }
- }
- if(jsflag==1)
- {
- JDQ=1;
- }
- if(ds==0)
- {
- JDQ=1;
- jsflag=1;
- KeyV=0;
- }
-
- }
- void disp_Time1(void) interrupt 3 using 3
- {
- TH1=0xdc;
- TL1=0x00;
- x=ds/1000;
- P0=LEDDis[x];
- P25=0;
- Delay(2);
- P25=1;
- y=(ds%1000)/100;
- P0=LEDDis[y];
- P26=0;
- Delay(2);
- P26=1;
- P0=0xbf;
- gang=0;
- Delay(2);
- gang=1;
- P0=LEDDis[((ds%1000)%100)/10];
- if(((ds%1000)%100)/10>=6) //滿60，百位減一
- {
- ds=ds-10;
- P0=LEDDis[6];
- }
- P27=0;
- Delay(2);
- P27=1;
- P0=LEDDis[((ds%1000)%100)%10];
- P28=0;
- Delay(2);
- P28=1;
- }
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