定时器控制流水灯

#include<reg52.h>
#include<intrins.h>
#define uchar unsigned char
#define uint unsigned int
uchar code table[10] = {0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f};
uchar code LED_W[8] = {0xfe,0xfd,0xfb,0xf7,0xef,0xdf,0xbf,0x7f};
uchar temp,tt;
char num;
void main()
{
TMOD=0x01;
TH0=(65536-50000)/256;
TL0=(65536-50000)%256;
EA=1;
ET0=1;
TR0=1;
tt=0;
num=0;
temp=0xfe;
P1=temp;
P2=LED_W[num];
P0=table[num];
while(1)
{
if(tt==20)
{
tt=0;
temp=_crol_(temp,1);
P1=temp;
if(num==7)
num=-1;
P2=LED_W[++num];
P0=table[num];
}
}
}
void time() interrupt 1
{
TH0=(65536-50000)/256;
TL0=(65536-50000)%256;
tt++;
}