oo.c

各种基本的小程序,用到了实验板中的各个功能,很有用哦!

#include<AT89x51.H>
unsigned char temp;
unsigned char m;
unsigned char ucount;
unsigned char second;
unsigned char code dispcode[]={
0xc0,0xf9,0xa4,0xb0,0x99,0x92,0x82,0xf8,0x80,0x90};
void delay(void)
{
unsigned char i,j,k;
for(i=0;i<20;i++)
for(j=0;j<20;j++)
for(k=0;k<248;k++);
}
main()
{
unsigned char a,b;
TMOD=0x01;
TH0=(65536-50000)/256;
TL0=(65536-50000)%256;
EA=1;
ET0=1;
TR0=1;
P0=0xf7;
while(1)
{
temp=0xfe;
P1=temp;
delay();
for(m=1;m<8;m++)
{
a=temp<<m;
b=temp>>(8-m);
P1=a|b;
delay();
}
for(m=1;m<8;m++)
{
a=temp>>m;
b=temp<<(8-m);
P1=a|b;
delay();
}
}
while(1);
}
void timerr0(void) interrupt 1
{
TH0=(65536-50000)/256;
TL0=(65536-50000)%256;
ucount++;
if(ucount==20)
{
ucount=0;
P2=dispcode[second++];
if(second==10)
second=0;
}
}