#include "reg52.h"
typedef unsigned int u16;
typedef unsigned char u8;
#define GPIO_DIG P0
#define GPIO_KEY P1
sbit LSA=P2^2;
sbit LSB=P2^3;
sbit LSC=P2^4;
u8 KeyValue; //用来存放读取到的键值
u8 code smgduan[17]={0x3f,0x06,0x5b,0x4f,0x66,0x6d,0x7d,0x07,
0x7f,0x6f,0x77,0x7c,0x39,0x5e,0x79,0x71};//显示0~F的值
void delay(u16 i)
{
while(i--);
}
void KeyDown(void)
{
char a=0;
GPIO_KEY=0x0f;
if(GPIO_KEY!=0x0f)
{
delay(1000);
if(GPIO_KEY!=0x0f)
{
//测试列
GPIO_KEY=0X0F;
switch(GPIO_KEY)
{
case(0X07): KeyValue=0;break;
case(0X0b): KeyValue=1;break;
case(0X0d): KeyValue=2;break;
case(0X0e): KeyValue=3;break;
}
//测试行
GPIO_KEY=0XF0;
switch(GPIO_KEY)
{
case(0X70): KeyValue=KeyValue;break;
case(0Xb0): KeyValue=KeyValue+4;break;
case(0Xd0): KeyValue=KeyValue+8;break;
case(0Xe0): KeyValue=KeyValue+12;break;
}
/*while((a<50)&&(GPIO_KEY!=0xf0)) //检测按键松手检测, 这一步松手 有啥子用? 我吧这注释了也不会怎么样,就是会响
{
delay(100);
a++;
}*/
}
}
}
void main()
{
LSA=0; //给一个数码管提供位选
LSB=0;
LSC=0;
while(1)
{
KeyDown(); //按键判断函数
GPIO_DIG=smgduan[KeyValue]; //
}
}
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