简单的共阴极数码管时钟显示程序（简单、易于理解，如果想定时只要再次基础上稍作修改即可）
#include
#define uint unsigned int
#define uchar unsigned char
uchar aa,shi1,shi0,fen1,fen0,miao1,miao0;
uint temp;
uchar shi,fen,miao;
uchar code table[]={
0x3f,0x06,0x5b,0x4f,
0x66,0x6d,0x7d,0x07,
0x7f,0x6f,0x77,0x7c,
0x39,0x5e,0x79,0x71};
void delay(uint z)
{
uint x,y;
for(x=z;x>0;x--)
for(y=110;y>0;y--);
}
void display(uchar shi1,shi0,fen1,fen0,miao1,miao0)
{
P2=0xfe;
P0=table[shi1];
delay(1);
P2=0xfd;
P0=table[shi0];
delay(1);
P2=0xfb;
P0=0x40;//"-"
delay(1);
P2=0xf7;
P0=table[fen1];
delay(1);
P2=0xef;
P0=table[fen0];
delay(1);
P2=0xdf;
P0=0x40;//"-"
delay(1);
P2=0xbf;
P0=table[miao1];
delay(1);
P2=0x7f;
P0=table[miao0];
delay(1);
}
void init()
{
temp=41760;
TMOD=0x01;
TH0=(65536-46080)/256;
TL0=(65536-46080)%256;
EA=1;
ET0=1;
TCON=0x10;
//TR0=1;
}
void main()
{
init();//初始化子程序
while(1)
{
if(aa==20)
{
aa=0;
temp++;
if(temp==86400)
{
temp=0;
}
shi1=temp/3600/10;
shi0=temp/3600-(shi1*10);
fen1=temp%3600/60/10;
fen0=temp%3600/60-(fen1*10);
miao1=temp%3600%60/10;
miao0=temp%3600%60-(miao1*10);
}
display(shi1,shi0,fen1,fen0,miao1,miao0);
}
}
void timer0() interrupt 1
{
TH0=(65536-46080)/256;
TL0=(65536-46080)%256;
aa++;
}
附原理图
