/**************************************************
实验名称：矩阵键盘实验一
实验目的：按下16个矩阵键盘依次在数码管上显示1-16的
平方。如按下第一个显示1，第二个显示4...
实验备注：
**************************************************/
#include<reg52.h>
#define uchar unsigned char
#define uint unsigned int
sbit DUAN = P2^6;
sbit WEI = P2^7;
uchar code duan_table[]=
{0x3f,0x06,0x5b,0x4f,
0x66,0x6d,0x7d,0x07,
0x7f,0x6f,0x77,0x7c,
0x39,0x5e,0x79,0x71};
uchar code wei_table[]=
{0xfe,0xfd,0xfb,
0xf7,0xef,0xdf};
void delay_1ms(uchar);
void display(uchar,uchar,uchar);
uchar scan_mkey(uchar);
void main()
{
uchar bai, ge, shi,num_tem;
uint num;
num_tem = 0;
num = 0;
while(1)
{
num_tem = scan_mkey(num_tem);
num = num_tem * num_tem;
bai = num/100;
shi = num%100/10;
ge = num%10;
display(bai,shi,ge);
}
}
void delay_1ms(uchar x)
{
uchar i, j;
for(i = 0; i < x; i++)
for(j = 0; j < 110; j++);
}
void display(uchar bai,uchar shi, uchar ge)
{
DUAN = 1;
P0 = duan_table[bai];
DUAN = 0;
P0 = 0xff;
WEI = 1;
P0 = wei_table[0];
WEI = 0;
delay_1ms(1);
DUAN = 1;
P0 = duan_table[shi];
DUAN = 0;
P0 = 0xff;
WEI = 1;
P0 = wei_table[1];
WEI = 0;
delay_1ms(1);
DUAN = 1;
P0 = duan_table[ge];
DUAN = 0;
P0 = 0xff;
WEI = 1;
P0 = wei_table[2];
WEI = 1;
delay_1ms(1);
}
uchar scan_mkey(uchar num_tem)
{
uchar temp, key;
P3 = 0xfe;
temp = P3;
temp = temp & 0xf0;
if(temp != 0xf0)
{
delay_1ms(10);
temp = P3;
temp = temp & 0xf0;
if(temp != 0xf0)
{
temp = P3;
switch(temp)
{
case 0xee:
key = 1;
break;
case 0xde:
key = 2;
break;
case 0xbe:
key = 3;
break;
case 0x7e:
key = 4;
break;
}
}
/* while(temp != 0xf0)
{
temp = P3;
temp = temp & 0xf0;
}
*/ }
P3 = 0xfd;
temp = P3;
temp = temp & 0xf0;
if(temp != 0xf0)
{
delay_1ms(5);
temp = P3;
temp = temp & 0xf0;
if(temp != 0xf0)
{
temp = P3;
switch(temp)
{
case 0xed:
key = 5;
break;
case 0xdd:
key = 6;
break;
case 0xbd:
key = 7;
break;
case 0x7d:
key = 8;
break;
}
}
/* while(temp != 0xf0)
{
temp = P3;
temp = temp & 0xf0;
}
*/ }
P3 = 0xfb;
temp = P3;
temp = temp &0xf0;
if(temp != 0xf0)
{
delay_1ms(5);
temp = P3;
temp = temp & 0xf0;
if(temp != 0xf0)
{
temp = P3;
switch(temp)
{
case 0xeb:
key = 9;
break;
case 0xdb:
key = 10;
break;
case 0xbb:
key = 11;
break;
case 0x7b:
key = 12;
break;
}
}
/* while(temp != 0xf0)
{
temp = P3;
temp = temp & 0xf0;
}
*/ }
P3 = 0xf7;
temp = P3;
temp = temp & 0xf0;
if(temp != 0xf0)
{
delay_1ms(5);
temp = P3;
temp = temp & 0xf0;
if(temp != 0xf0)
{
temp = P3;
switch(temp)
{
case 0xe7:
key = 13;
break;
case 0xd7:
key = 14;
break;
case 0xb7:
key = 15;
break;
case 0x77:
key = 16;
break;
}
}
/* while(temp != 0xf0)
{
temp = P3;
temp = temp & 0xf0;
}
*/ }
if(key != num_tem)
return key;
else
return num_tem;
}
/**************************************************
实验名称：矩阵键盘实验二
实验目的：按下16个矩阵键盘依次在数码管上显示1-16
实验备注：
**************************************************/
#include<reg52.h>
#define uchar unsigned char
#define uint unsigned int
sbit DUAN = P2^6;
sbit WEI = P2^7;
uchar code duan_table[]=
{0x3f,0x06,0x5b,0x4f,
0x66,0x6d,0x7d,0x07,
0x7f,0x6f,0x77,0x7c,
0x39,0x5e,0x79,0x71};
uchar code wei_table[]=
{0xfe,0xfd,0xfb,
0xf7,0xef,0xdf};
void delay_1ms(uchar);
void display(uchar);
void scan_mkey();
void main()
{
while(1)
{
scan_mkey();
}
}
void scan_mkey()
{
uchar key, temp;
P3 = 0xfe;
temp = P3;
temp = temp & 0xf0;
if(temp != 0xf0)
{
delay_1ms(5);
temp = P3;
temp = temp & 0xf0;
if(temp != 0xf0)
{
temp = P3; //重新赋值必不可少！
switch(temp)
{
case 0xee:
key = 0;
break;
case 0xde:
key = 1;
break;
case 0xbe:
key = 2;
break;
case 0x7e:
key = 3;
break;
}
}
while(temp != 0xf0)
{
display(key);
temp = P3;
temp = temp & 0xf0;
}
}
P0 = 0xff;//这三句用来控制
WEI = 1; //按着的时候点亮
WEI = 0; //松手就熄灭
}
void delay_1ms(uchar x)
{
uchar i, j;
for(i = 0; i < x; i++)
for(j = 0; j <110; j++);
}
void display(uchar i)
{
DUAN = 1;
P0 = duan_table[i];
DUAN = 0;
P0 = 0xff;
WEI = 1;
P0 = wei_table[0];
WEI = 0;
delay_1ms(1);
}
