yy1.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 i,j,a,b,c,d,k,aa,bb,temp;
unsigned char code dispcode[]={
0xc0,0xf9,0xa4,0xb0,0x99,0x92,0x82,
0xf8,0x80,0x90};
void delay1ms(void)
{
for(i=0;i<2;i++)
for(j=0;j<248;j++);
}
void delay10ms(void)
{
for(i=0;i<20;i++)
for(j=0;j<248;j++);
}
main()
{
temp=0xfe;
P1=temp;
while(1)
{
if(P3_2==0)
{
delay10ms();
if(P3_2==0)
{
a++;
k++;
if(k==8)
k=0;
if(a==10)
{
a=0;
b++;
if(b==10)
{
b=0;
c++;
if(c==10)
{
c=0;
d++;
if(d==10)
d=0;
}
}
}
}
}
while(!P3_2);
P2=dispcode[a];
P0=0xbf;
delay1ms();
P2=dispcode[b];
P0=0xef;
delay1ms();
P2=dispcode[c];
P0=0xdf;
delay1ms();
P2=dispcode[d];
P0=0xf7;
delay1ms();
aa=temp<<k;
bb=temp>>(8-k);
P1=aa|bb;
delay1ms();
}
}