单片机源程序如下:
#include<reg51.h>
#define uchar unsigned char
void delay(unsigned int i)
{
unsigned int j;
for(;i>0;i--)
for(j=0;j<125;j++)
{;}
}
void main()
{
uchar display[9]={0xff,0xfe,0xfd,0xfb,0xf7,0xef,0xdf,0xbf,0x7f};
unsigned int a;
while(1)
{
EA=1;
EX0=1;
EX1=1;
IT0=1;
IT1=1;
PX0=0;
PX1=1;
for(a=0;a<9;a++)
{
delay(500);
P1=display[a];
}
}
}
void int0_isr() interrupt 0 using 1
{
uchar n;
for(n=0;n<10;n++)
{
P1=0x0f;
delay(500);
P1=0xf0;
delay(500);
}
}
void int1_isr() interrupt 2 using 2
{
uchar m;
for(m=0;m<10;m++)
{
P1=0xff;
delay(500);
P1=0;
delay(500);
}
}
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