是用51hei单片机开发板 电路图详见：http://www.51hei.com/f/51hei-5.pdf 的数码管部分， 用2个74hc573 锁存，p0口作为数据口 ，p3.6和p3.7分别是段和位的锁存端口.P2口上面是按键
- #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 code ACT[4]={0xfe,0xfd,0xfb,0xf7};
- sbit D=P3^6;
- sbit V=P3^7;
- void delay(uint k);
- //==============
- enum week_day{mon=1,tue,wed,thu,fri,sat,sun};
- enum week_day day;
- //==========
- void key_scan(void)
- {uchar temp;
- P2=0xff;
- temp=P2;
- if(temp!=0xff)
- {
- switch(temp)
- {
- case 0xef:day=mon;break;
- case 0xdf:day=tue;break;
- case 0xcf:day=wed;break;
- case 0xbf:day=thu;break;
- case 0xaf:day=fri;break;
- case 0x9f:day=sat;break;
- case 0x8f:day=sun;break;
- default:break;
- }
- }
- }
- //=========
- void main(void)
- {
- for(;;)
- {
- key_scan();
- D=1;P0=SEG7[day];D=0;P0=0xff;V=1;P0=ACT[3];V=0;delay(300);
- }
- }
- //================
- void delay(uint k)
- {
- uint data i,j;
- for(i=0;i<k;i++){
- for(j=0;j<121;j++)
- {;}}
- }
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