单片机按键计数器中断作业

ID:257043 · 发表于 2017-12-4 09:25

#include<reg51.h>
#define uchar unsigned char
#define uint unsigned int
uchar code segdate[]={0xc0,0xf9,0xa4,0xb0,0x99,0x92,0x82,0xf8,0x80,0x90};
uchar time;
delay()
{
      uint i;
      for(i=0;i<100;i++);
}
main()
{
      time=0;
      EA=1;
      EX0=1;
      IT0=1;
while(1)
      {
            P2=0xfe;
            P0=segdate[time/10];
            delay();
            P2=0xfd;
            P0=segdate[time%10];
            delay();
      }
}
void EX_INT0() interrupt 0
{
      time++;
      if(time>30)
      {time=0;}
}

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单片机按键计数器中断作业

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