单片机1S倒计时仿真

ID:257043 · 发表于 2017-12-4 09:26

仿真原理图如下（proteus仿真工程文件可到本帖附件中下载）

单片机源程序
#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;
uchar sec;
uchar scon;
uchar keycon;
delay()
{
      uchar i,j;
      for(i=0;i<4;i++)
      for(j=0;j<250;j++);
}
main()
{
TMOD=0x01;
      ET0=1;

      EA=1;
      EX0=1;
      IT0=1;
sec=0;
      scon=0;
      keycon=0;

while(1)
      {
            P2=0xfe;
            P0=segdate[sec%10];
            delay();
            P2=0xfd;
            P0=segdate[sec/10];
            delay();
      }
}
void t0(void) interrupt 1 using 0
{
TH0=0x3c;
      TL0=0xb0;
      scon++;
      if(scon==20)
      {
         scon=0;
         sec++;
         if(sec==31)
         {sec=0;}
      }

}
void int0(void)       interrupt 0 using 1
{
   keycon++;
      switch(keycon)
      {
         case 1:TH0=0x3c;TL0=0xb0;TR0=1; break;
         case 2:TR0=0; break;
         case 3:keycon=0;sec=0; break;
      }
}

帐号		自动登录	找回密码
密码			立即注册