#include <reg51.h>
#include <math.h>
#include <intrins.h>
#define uchar unsigned char
#define TURE 1
#define FALSE 0
int key;
int del;
void Tkey(void);
/************主 程序*************/
void main(void)
{
void tkey(void);
void delay(int);
SCON=0x00;
TI=0;
while(TURE)
{
Tkey();
delay(2000);
}
}
void Tkey(void)
{
uchar readkey;//rereadkey;
uchar x_temp,y_temp;
P1=0x0f;
x_temp=P1&0x0f;
if(x_temp==0x0f) goto keyout;
P1=0xf0;
y_temp=P1&0xf0;
readkey=x_temp|y_temp;
readkey=~readkey;
switch(readkey)
{
case 0x11:key=0; break;
case 0x21:key=1; break;
case 0x41:key=2; break;
case 0x81:key=3; break;
case 0x12:key=4; break;
case 0x22:key=5; break;
case 0x42:key=6; break;
case 0x82:key=7; break;
case 0x14:key=8; break;
case 0x24:key=9; break;
case 0x44:key=10;break;
case 0x84:key=11;break;
case 0x18:key=12;break;
case 0x28:key=13;break;
case 0x48:key=14;break;
case 0x88:key=15;break;
default: key=16;break;
}
keyout:_nop_();
}
/************延时程序*************/
void delay(del)
{
for(del;del>0;del--);
}
peigongjunbd :
谢谢指教,不知道哪里有错,能不能帮忙改正?
还有下面0x11这些按键代码是怎么出来的,前面没有定义啊?
case 0x11:key=0; break;
能不能把总体的原理说一下,谢谢!
追加积分哦!