数码管显示矩阵键盘数字单片机程序 -

标题: 数码管显示矩阵键盘数字单片机程序 [打印本页]

作者: 01156165465 时间: 2020-4-19 14:51
标题: 数码管显示矩阵键盘数字单片机程序

#include<reg52.h>    //????????????P0?ο??P1λ??//
#define uint unsigned int
#define uchar unsigned char
uchar code table[]={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,0x7f,0x6f,0x77,0x7c,0x39,0x5e,0x79,0x71};
sbit k1=P3^4;
sbit k2=P3^5;
sbit k3=P3^6;
sbit k4=P3^7;
void delayms(uint);
void display(uchar);
void mkcan();
uchar num;
void main()
{
P0=0x00;
P1=0x00;
while(1)
{
   mkcan();
}
}
void delayms(uint xms)    //???//
{
uint i,j;
for(i=xms;i>0;i--)
  for(j=100;j>0;j--);
}
void mkcan()
{
uchar temp,k;
P3=0xfe;
temp=P3;
temp=temp&0xf0;
if(temp!=0xf0)
{
  delayms(10);
  temp=P3;
  temp=temp&0xf0;
  if(temp!=0xf0)
  {
temp=P3;
switch(temp)
{
case 0xee:
   k=0;
   break;
case 0xde:
   k=1;
   break;
case 0xbe:
   k=2;
   break;
case 0x7e:
   k=3;
   break;
}
  while(temp!=0xf0)
  {
temp=P3;
temp=temp&0xf0;
  }
  display(k);
   }
}
P3=0xfd;
temp=P3;
temp=temp&0xf0;
if(temp!=0xf0)
{
  delayms(10);
  temp=P3;
  temp=temp&0xf0;
  if(temp!=0xf0)
  {
temp=P3;
switch(temp)
{
case 0xed:
   k=4;
   break;
case 0xdd:
   k=5;
   break;
case 0xbd:
   k=6;
   break;
case 0x7d:
   k=7;
   break;
}
  while(temp!=0xf0)
  {
temp=P3;
temp=temp&0xf0;
  }
  display(k);
   }
}
P3=0xfb;
temp=P3;
temp=temp&0xf0;
if(temp!=0xf0)
{
  delayms(10);
  temp=P3;
  temp=temp&0xf0;
  if(temp!=0xf0)
  {
temp=P3;
switch(temp)
{
case 0xeb:
   k=8;
   break;
case 0xdb:
   k=9;
   break;
case 0xbb:
   k=10;
   break;
case 0x7b:
   k=11;
   break;
}
  while(temp!=0xf0)
  {
temp=P3;
temp=temp&0xf0;
  }
  display(k);
   }
}
P3=0xf7;
temp=P3;
temp=temp&0xf0;
if(temp!=0xf0)
{
  delayms(10);
  temp=P3;
  temp=temp&0xf0;
  if(temp!=0xf0)
  {
temp=P3;
switch(temp)
{
case 0xe7:
   k=12;
   break;
case 0xd7:
   k=13;
   break;
case 0xb7:
   k=14;
   break;
case 0x77:
   k=15;
   break;
}
  while(temp!=0xf0)
  {
temp=P3;
temp=temp&0xf0;
  }
  display(k);
   }
}
}

void display(uchar num)
{
  P0=table[num];
}

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