矩阵键盘
矩阵键盘
#include <reg52.h>
#define uchar unsigned char
#define uint unsigned int
sbit wei = P2^7;
sbit duan = P2^6;
unsigned char leddata[]={
0x3F, //"0"
0x06, //"1"
0x5B, //"2"
0x4F, //"3"
0x66, //"4"
0x6D, //"5"
0x7D, //"6"
0x07, //"7"
0x7F, //"8"
0x6F, //"9"
0x77, //"A"
0x7C, //"B"
0x39, //"C"
0x5E, //"D"
0x79, //"E"
0x71, //"F"
0x76, //"H"
0x38, //"L"
0x37, //"n"
0x3E, //"u"
0x73, //"P"
0x5C, //"o"
0x40, //"-"
0x00, //熄灭
0x00 //自定义
};
void delay(uint z)
{
uintx,y;
for(x= z;x > 0;x--)
for(y= 120; y > 0; y--);
}
uchar KeyScan()
{
ucharcord_l,cord_h;//声明列和行向量
P3= 0xf0;
if((P3& 0xf0) != 0xf0)//判断是否有按键按下
{
delay(5);//软件延时,消抖
if((P3& 0xf0) != 0xf0)
{
cord_l= P3 & 0xf0; //存储列线值
//低4位,行线值,高4位,列线值
P3= cord_l | 0x0f;
cord_h= P3 & 0x0f;//储存行线值
while(P3& 0x0f != 0x0f);
return(cord_l+cord_h);
}
}
}
void KeyPro()
{
switch(KeyScan() )
{
case0xee: P0 = leddata[0];break;
case0xde: P0 = leddata[1];break;
case0xbe: P0 = leddata[2];break;
case0x7e: P0 = leddata[3];break;
case0xed: P0 = leddata[4];break;
case0xdd: P0 = leddata[5];break;
case0xbd: P0 = leddata[6];break;
case0x7d: P0 = leddata[7];break;
case0xeb: P0 = leddata[8];break;
case0xdb: P0 = leddata[9];break;
case0xbb: P0 = leddata[10];break;
case0x7b: P0 = leddata[11];break;
case0xe7: P0 = leddata[12];break;
case0xd7: P0 = leddata[13];break;
case0xb7: P0 = leddata[14];break;
case0x77: P0 = leddata[15];break;
}
}
void main()
{
wei= 1; //位选操作
P0= 0;
wei= 0;
duan= 1; //段选操作
while(1)
{
KeyPro();
}
}