51单片机矩阵键盘

ID:282367 · 发表于 2018-2-5 15:08

#include<reg52.h>
#define uint unsigned int
#define uchar unsigned char
sbit dula=P2^6;
sbit wela=P2^7;
sbit key1=P3^4;
uchar code table[]={
0x3f,0x06,0x5b,0x4f,
0x66,0x6d,0x7d,0x07,
0x7f,0x6f,0x77,0x7c,
0x39,0x5e,0x79,0x71,0};
uchar num,temp;//,num1,beep;
void delay(uint z)
{
uint x,y;
for(x=z; x>0; x--)
for(y=110; y>0; y--);
}
uchar keyscan();
void display(uchar aa);
void main()
{
num=17;
dula=1;
P0=0;
dula=0;
wela=1;
P0=0xc0; //P0=0;
wela=0;
while(1)
{
display(keyscan());
}
}
void display(uchar aa)
{
dula=1;
P0=table[aa-1];
dula=0;
}
uchar keyscan()
{
P3=0xfe;
temp=P3;
temp=temp&0xf0;
while(temp!=0xf0)
{
delay(5);
temp=P3;
temp=temp&0xf0;
while(temp!=0xf0)
{
temp=P3;
switch(temp)
{
case 0xee:num=1;
break;
case 0xde:num=2;
break;
case 0xbe:num=3;
break;
case 0x7e:num=4;
break;
}
while(temp!=0xf0)
{
temp=P3;
temp=temp&0xf0;
//beep=0;
}
   /* dula=1;
   P0=table[num-1];
   dula=0; */
}
}

P3=0xfd;
temp=P3;
temp=temp&0xf0;
while(temp!=0xf0)
{
delay(5);
temp=P3;
temp=temp&0xf0;
while(temp!=0xf0)
{
temp=P3;
      switch(temp)
{
case 0xed:num=5;
break;
case 0xdd:num=6;
break;
case 0xbd:num=7;
break;
case 0x7d:num=8;
break;
}
while(temp!=0xf0)
{
temp=P3;
temp=temp&0xf0;
// beep=0;
}
/*    dula=1;
   P0=table[num-1];
   dula=0;    */
}
}

P3=0xfb;
temp=P3;
temp=temp&0xf0;
while(temp!=0xf0)
{
delay(5);
temp=P3;
temp=temp&0xf0;
while(temp!=0xf0)
{
temp=P3;
switch(temp)
{
case 0xeb:num=9;
break;
case 0xdb:num=10;
break;
case 0xbb:num=11;
break;
case 0x7b:num=12;
break;
}
while(temp!=0xf0)
{
temp=P3;

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