基于51单片机的八路抢答器代码与Proteus仿真图 -

标题: 基于51单片机的八路抢答器代码与Proteus仿真图 [打印本页]

作者: daxionghhh 时间: 2022-6-8 22:19
标题: 基于51单片机的八路抢答器代码与Proteus仿真图
仿真原理图如下（proteus仿真工程文件可到本帖附件中下载）

单片机源程序如下:
//4*4键盘检测程序,按下键后相应的代码显示在数码管上
#include<reg51.h>
#define uchar unsigned char
#define uint unsigned int
sbit beep=P2^3;
sbit dula=P2^6;
sbit wela=P2^7;
      unsigned char i=100;
unsigned char j,k,temp,key,t,time=30,mode=1;
void delay(unsigned char i)
{
  for(j=i;j>0;j--)
for(k=125;k>0;k--);
}
unsigned char code table[]={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,
                     0x07,0x7f,0x6f,0x77,0x7c,0x39,0x5e,0x79,0x71};
void init()
{
      TMOD=0x01;
      TH0=0x3C;
      TL0=0x80;
      ET0=1;
      TR0=0;
      EA=1;

}
void sound()
{
      beep=0;
      delay(150);
      beep=1;
      delay(20);
}
void data_tim()
{
      if(t==20)
      {
            t=0;
            time--;
            if(time==0)
            {
                     TR0=0;
                     mode=1;
                     sound();
            }
      }
}
void display(uchar q_c,uchar bai_c,uchar sh_c,uchar g_c)                      //显示程序
{

P0=table[q_c];             //显示编号
dula=1;
dula=0;

P0=0xfe;
wela=1;
wela=0;
delay(5);

P0=table[bai_c];             //显示百位
dula=1;
dula=0;

P0=0xf7;
wela=1;
wela=0;
delay(5);

dula=0;
P0=table[sh_c];             //显示十位
dula=1;
dula=0;

wela=0;
P0=0xef;
wela=1;
wela=0;
delay(5);

P0=table[g_c];             //显示个位
dula=1;
dula=0;

P0=0xdf;
wela=1;
wela=0;
delay(5);
}

void keyscan()
{

      P3=0xfe;
temp=P3;
temp=temp&0xf0;
if(temp!=0xf0)
{
   delay(10);
   if(temp!=0xf0)
   {
      temp=P3;
      switch(temp)
      {
      case 0xee:
            //key=0;
                        TR0=~TR0;
                        mode=0;
            break;

      case 0xde:
            mode=0;
                        key=0;
                        time=30;
            break;

      case 0xbe:
            //key=2;
                        time+=1;
            break;

      case 0x7e:
            //key=3;
                        time-=1;
            break;
      }
      while(temp!=0xf0)
      {
         temp=P3;
         temp=temp&0xf0;
         beep=0;
      }
      beep=1;
//       display(key);
      // P0=table[key];
/*       P0=0xff;
      dula=1;

      while(i--);
      dula=0;
      P0=0xc0;
      wela=1;
      wela=0;
  dula=0;
  wela=0;
  P0=0xff;
  dula=1;
  dula=0;
  P0=0xc5;
  wela=1;
  wela=0; */
      P1=0xfe;
   }
}
      if(mode==0)
      {
P3=0xfd;
temp=P3;
temp=temp&0xf0;
if(temp!=0xf0)
{
   delay(10);
   if(temp!=0xf0)
   {
      temp=P3;
      switch(temp)
      {
      case 0xed:
            key=1;
                        TR0=0;
                        mode=1;
            break;

      case 0xdd:
            key=2;
                        TR0=0;
                        mode=1;
            break;

      case 0xbd:
            key=3;
                        TR0=0;
                        mode=1;
            break;

      case 0x7d:
            key=4;
                        TR0=0;
                        mode=1;
            break;
      }
      while(temp!=0xf0)
      {
         temp=P3;
         temp=temp&0xf0;
         //beep=0;
      }
      beep=1;
//       display(key);
/*       P0=table[key];
      dula=1;
   // while(100--);
      dula=0;
      P0=0xc0;
      wela=1;
      wela=0;
  */    P1=0xfc;
   }
   }
P3=0xfb;
temp=P3;
temp=temp&0xf0;
if(temp!=0xf0)
{
   delay(10);
   if(temp!=0xf0)
   {
      temp=P3;
      switch(temp)
      {
      case 0xeb:
            key=5;
                        mode=1;
                        TR0=0;
            break;

      case 0xdb:
            key=6;
                        TR0=0;
                        mode=1;
            break;

      case 0xbb:
            key=7;
                        TR0=0;
                        mode=1;
            break;

      case 0x7b:
            key=8;
                        TR0=0;
                        mode=1;
            break;
      }
      while(temp!=0xf0)
      {
         temp=P3;
         temp=temp&0xf0;
         //beep=0;
      }
      beep=1;
//       display(key);
   /* P0=table[key];
      dula=1;
   // while(100--);
      dula=0;
      P0=0xc0;
      wela=1;
      wela=0;
*/    P1=0xf8;
   }
   }
P3=0xf7;
temp=P3;
temp=temp&0xf0;
if(temp!=0xf0)
{
   delay(10);
   if(temp!=0xf0)
   {
      temp=P3;
      switch(temp)
      {
      case 0xe7:
            key=12;
            break;

      case 0xd7:
            key=13;
            break;

      case 0xb7:
            key=14;
            break;

      case 0x77:
            key=15;
            break;
      }
      while(temp!=0xf0)
      {
         temp=P3;
         temp=temp&0xf0;
         //beep=0;
      }
      beep=1;
//       display(key);
  /*    P0=table[key];
      dula=1;
//    while(100--);
      dula=0;
      P0=0xc0;
      wela=1;
      wela=0;
*/    P1=0xf0;
   }

}
      }
}
void main()
{
  dula=0;
  wela=0;
  init();
  while(1)
  {
   keyscan();
      data_tim();
      display(key,time/100,time%100/10,time%10);
  }
}

void Timer0() interrupt       1
{
      t++;
      TH0=0x3C;
      TL0=0x80;
}

Keil代码与Proteus8.8仿真下载:

八路抢答器.7z (277.74 KB, 下载次数: 37)

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