rr1.c

关于51的各种例子,仔细学习后会有很大的作用

#include<AT89x51.H>
unsigned char second;
unsigned char tcount;
unsigned char code dispcode[]={
0xc0,0xf9,0xa4,0xb0,0x99,0x92,0x82,0xf8,0x80,0x6f};
main()
{
TMOD=0x01;
TH0=(65536-50000)/256;
TL0=(65536-50000)%256;
EA=1;
ET0=1;
TR0=1;
P0=0xf7;
while(1);
}
void  timerr0() interrupt 1 
{
TH0=(65536-50000)/256;
TL0=(65536-50000)%256;
tcount++;
if(tcount==20)
{
tcount=0;
P2=dispcode[second++];
if(second==10)
second=0;
}
}