下面是源代码，接线使用四位共阴的数码管
/*
数码管接口 单片机IO口
01 P0.0
02 P0.1
03 P0.2
04 P0.3
05 P0.4
06 P2.4
07 P0.5
08 P2.5
09 P2.6
10 P0.6
11 P0.7
12 P2.7
*/
#include<STC12C5A60S2.h>
sbit leda=P2^7;
sbit ledb=P2^6;
sbit ledc=P2^5;
sbit ledd=P2^4;
sbit point=P0^2;
void delay(unsigned int i){
unsigned int j;
for(;i>0;i--){
for(j=0;j<600;j++);
}
}
void show(unsigned int a,bit p){
if(a==0){P0=0xeb;}
if(a==1){P0=0x28;}
if(a==2){P0=0xb3;}
if(a==3){P0=0xba;}
if(a==4){P0=0x78;}
if(a==5){P0=0xda;}
if(a==6){P0=0xdb;}
if(a==7){P0=0xa8;}
if(a==8){P0=0xfb;}
if(a==9){P0=0xfa;}
if(p==1){point=1;}
}
void xs(unsigned int a,b,c,d,bit pa,pb,pc,pd,time){
leda=1;
ledb=1;
ledc=1;
ledd=1;
leda=0;
show(a,pa);
delay(time);
leda=1;
ledb=0;
show(b,pb);
delay(time);
ledb=1;
ledc=0;
show(c,pc);
delay(time);
ledc=1;
ledd=0;
show(d,pd);
delay(time);
ledd=1;
}
void main(void){
xs(1,2,3,4,1,0,1,0,1);
}
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