#include<reg52.h>
unsigned char code ledchar[10]={
0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x0f,0x6f};
unsigned char ledbuff[2]={0xff,0xff};
unsigned char i=0;
unsigned int cnt=0;
unsigned char flag1s=0;
void main()
{
unsigned int sec = 0;
EA=1;
TMOD=0x01;
TH0=0xfC;
TL0=0x67;
ET0=1;
TR0=1;
while(1)
{
if(flag1s==1)
{
flag1s=0;
sec++;
ledbuff[0]=ledchar[sec%10];
ledbuff[1]=ledchar[sec/10%10];
}
}
}
void yb() interrupt 1
{
TH0=0xfC;
TL0=0x67;
cnt++;
if(cnt>=1000)
{
cnt=0;
flag1s=1;
}
P0=0x00;
switch(i)
{
case 0:P1=0xfe;i++;P0=ledbuff[0];break;
case 1:P1=0xfd;i=0;P0=ledbuff[1];break;
default:break;
}
}
此程序運行OK，但是無法點亮，請高手指點那里有問題，謝謝啦！
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