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是用51hei單片機開發板 電路圖詳見：http://www.zg4o1577.cn/f/51hei-5.pdf 的數碼管部分， 用2個74hc573 鎖存，p0口作為數據口 ，注意圖中要改一下p3.6和p3.7分別是段和位的鎖存端口.P2口上面是按鍵- #include<reg52.h>
- #define uchar unsigned char
- #define uint unsigned int
- //======================
- uchar code SEG7[10]={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f};
- uchar ACT[8]={0xfe,0xfd,0xfb,0xf7,0xef,0xdf,0xbf,0x7f};
- uchar code WEEK_SEG7[8]={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x7f};
- sbit D=P3^6;
- sbit V=P3^7;
- uchar deda,sec,min,hour,week=1;
- uchar cnt;
- //===========
- void init(void)
- {
- TMOD=0x11;
- TH0=-(50000/256);
- TL0=-(50000%256);
- ET0=1;
- TR0=1;
- TH1=-(1000/256);
- TL1=-(1000%256);
- ET1=1;
- TR1=1;
- EA=1;
- }
- //==========
- void time0(void) interrupt 1
- {
- TH0=-(50000/256);
- TL0=-(50000%256);
- deda++;
- }
- //============
- void time1(void) interrupt 3
- {
- TH1=-(1000/256);
- TL1=-(1000%256);
- if(++cnt>7)cnt=0;
- switch(cnt)
- {
- case 0:D=1;P0=SEG7[sec%10];D=0;P0=0xff;V=1;P0=ACT[5];V=0;break;
- case 1:D=1;P0=SEG7[sec/10];D=0;P0=0xff;V=1;P0=ACT[4];V=0;break;
- case 2:D=1;P0=SEG7[min%10];D=0;P0=0xff;V=1;P0=ACT[3];V=0;break;
- case 3:D=1;P0=SEG7[min/10];D=0;P0=0xff;V=1;P0=ACT[2];V=0;break;
- case 4:D=1;P0=SEG7[hour%10];D=0;P0=0xff;V=1;P0=ACT[1];V=0;break;
- case 5:D=1;P0=SEG7[hour/10];D=0;P0=0xff;V=1;P0=ACT[0];V=0;break;
- case 6:D=1;P0=0x00;D=0;P0=0xff;V=1;P0=0xff;V=0;break;
- case 7:D=1;P0=WEEK_SEG7[week];D=0;P0=0xff;V=1;P0=ACT[7];V=0;break;
- default:break;
- }
- }
- //========
- void conv(void)
- {
- if(deda>=20){deda=0;sec++;}
- if(sec>=60){sec=0;min++;}
- if(min>=60){min=0;hour++;}
- if(hour>=24){hour=0;week++;}
- if(week>7){week=1;}
- }
- //===========
- void main(void)
- {
- init();
- while(1)
- {
- conv();
- }
- }
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