C语言 24小时制时钟单片机程序源码
- #include<reg52.h>
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- #define uchar unsigned char
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- #define uint unsigned int
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- uchar code dx[]={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f};
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- uchar code wx[]={0x7f,0xbf,0xdf,0xef,0xf7,0xfb,0xfd,0xfe};
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- void timer();
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- void display(uchar b,uchar c ,uchar d ,uchar e,uchar f,uchar g);
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- uchar a,b,c,d,e,f,g;
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- int h;
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- void delay()
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- {
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- uchar a;
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- for(a=0;a<=250;a++)
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- ;
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- }
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- void main()
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- {
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- timer();
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- while(1)
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- {
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- if(a==20)
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- {
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- a=0;
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- h++;
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- g=h%3600%60%10;
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- f=h%3600%60/10;
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- e=h%3600/60%10;
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- d=h%3600/60/10;
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- c=h/3600%60;
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- b=h/3600/60;
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- }
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- display(b,c,d,e,f,g);
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- }
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- }
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-
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- void timer()
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- {
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- TMOD=0x01;
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- TH0=(65536-50000)/256;
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- TL0=(65536-50000)%256;
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- EA=1;
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- ET0=1;
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- TR0=1;
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- }
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-
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- void timer0() interrupt 1
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- {
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- TH0=(65536-50000)/256;
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- TL0=(65536-50000)%256;
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- a++;
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- }
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-
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- void display(uchar b,uchar c ,uchar d ,uchar e,uchar f,uchar g)
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- {
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- P2=wx[2];
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- P0=dx;
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- delay();
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- P2=wx[3];
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- P0=dx[c];
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- delay();
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- P2=wx[4];
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- P0=dx[d];
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- delay();
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- P2=wx[5];
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- P0=dx[e];
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- delay();
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- P2=wx[6];
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- P0=dx[f];
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- delay();
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- P2=wx[7];
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- P0=dx[g];
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- delay();
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- }
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