89c51单片机的P3口接一个共阳极的数码管，P1口接4*4的键盘，每个键的键值依次是0~F，要求任意按下一个键，

Question

89c51单片机的P3口接一个共阳极的数码管，P1口接4*4的键盘，每个键的键值依次是0~F，要求任意按下一个键，则在数码管上显示该键的键值，编写一段完成上述任务的程序

Answer 1

#include<reg52.h>
#define uint unsigned int
#define uchar unsigned char
//sbit w=P3^4;
uchar code dula[]={0xc0,0xf9,0xa4,0xb0,0x99,0x92,0x82,
0xf8,0x80,0x90,0x88,0x83,0xc6,0xa1,0x86,0x8e};//数码管段选
uchar temp,num,key;
char display();
void dula(uchar aa);
void delay(uint z)
{
uint x,y;
for(x=z;x>0;x--)
for(y=110;y>0;y--);
}
void main()
{
num=0;
P3=0；
while(1)
{
dula(display());显示程序

}
}
void dula(uchar aa)
{
P3=0；初始值
P3=dula[num];

}
char display()//键盘扫描程序
{
P0=0xfe;
temp=P0;
temp=temp&0xf0;
while(temp!=0xf0)
{
delay(10);
temp=P0;
temp=temp&0xf0;
while(temp!=0xf0)
{
temp=P0;
switch(temp)
{
case 0xee:num=0; break;
case 0xde:num=1;break;
case 0xbe:num=2;break;
case 0x7e:num=3;break;
}
while(temp!=0xf0)
{
temp=P0;
temp=temp&0xf0;
}
}
}

P0=0xfd;
temp=P0;
temp=temp&0xf0;
while(temp!=0xf0)
{
delay(10);
temp=P0;
temp=temp&0xf0;
while(temp!=0xf0)
{
temp=P0;
switch(temp)
{
case 0xed:num=4; break;
case 0xdd:num=5;break;
case 0xbd:num=6;break;
case 0x7d:num=7;break;
}
while(temp!=0xf0)
{
temp=P0;
temp=temp&0xf0;
}
}
}

P0=0xfb;
temp=P0;
temp=temp&0xf0;
while(temp!=0xf0)
{
delay(10);
temp=P0;
temp=temp&0xf0;
while(temp!=0xf0)
{
temp=P0;
switch(temp)
{
case 0xeb:num=8; break;
case 0xdb:num=9;break;
case 0xbb:num=10;break;
case 0x7b:num=11;break;
}
while(temp!=0xf0)
{
temp=P0;
temp=temp&0xf0;
}
}
}

P0=0xf7;
temp=P0;
temp=temp&0xf0;
while(temp!=0xf0)
{
delay(10);
temp=P0;
temp=temp&0xf0;
while(temp!=0xf0)
{
temp=P0;
switch(temp)
{
case 0xe7:num=12; break;
case 0xd7:num=13;break;
case 0xb7:num=14;break;
case 0x77:num=15;break;
}
while(temp!=0xf0)
{
temp=P0;
temp=temp&0xf0;
}
}
}
return num;
}
这是键盘扫描程序，你把键盘接到P0口即可!

Answer 2

没有联系方式啊，那我直接发在这里了，望给分哈~~谢谢
#include <reg52.h>
#define uchar unsigned char
#define uint unsigned int
sbit BEEP = P3^7;

uchar code DSY_CODE[]=
{
0xc0,0xf9,0xa4,0xb0,0x99,0x92,0x82,0xf8,0x80,0x90,0x88,0x83,0xc6,0xa1,0x86,0x8e,0x00
};

uchar Pre_KeyNO = 16,KeyNO = 16; // c d e f

void DelayMS(uint ms)
{
uchar t;
while(ms--)
{
for(t=0;t<120;t++);
}
}

void Keys_Scan()
{
uchar Tmp;
P1 = 0x0f;
DelayMS(1);
Tmp = P1 ^ 0x0f;
switch(Tmp)
{
case 1: KeyNO = 0; break;
case 2: KeyNO = 1; break;
case 4: KeyNO = 2; break;
case 8: KeyNO = 3; break;
default: KeyNO = 16;
}
P1 = 0xf0;
DelayMS(1);
Tmp = P1 >> 4 ^ 0x0f;
switch(Tmp)
{
case 1: KeyNO += 0; break;
case 2: KeyNO += 4; break;
case 4: KeyNO += 8; break;
case 8: KeyNO += 12;
}
}

void Beep()
{
uchar i;
for(i=0;i<100;i++)
{
DelayMS(1);
BEEP = ~BEEP;
}
BEEP = 1;
}

void main()
{
P0 = 0x00;
while(1)
{
P1 = 0xf0;
if(P1 != 0xf0)
Keys_Scan();
if(Pre_KeyNO != KeyNO)
{
P3 = DSY_CODE[KeyNO];
Beep();
Pre_KeyNO = KeyNO;
}
DelayMS(100);
}
}

Answer 3

把你QQ显示出来！给你发过去

追问

发到我邮箱里，谢谢。

Answer 4

很简单。可以联系我来做，保证速度和质量

追问

可以我怎么联系你