1读取矩阵键盘的键码值,把它显示在LCD1602上
#include <REGX52.H>
#include "Delay.h"
#include "LCD1602.h"
#include "MatrixKey.h"
unsigned char KeyNum;
void main()
{
LCD_Init();
LCD_ShowString(1,1,"MatrixKey:");
while(1)
{
KeyNum=MatrixKey();
if(KeyNum)//KeyNum!=0
//按键按下了再进行操作
{
LCD_ShowNum(2,1,KeyNum,2);
}
}
}
2矩阵键盘密码锁
#include <REGX52.H>
#include "Delay.h"
#include "LCD1602.h"
#include "MatrixKey.h"
unsigned char KeyNum;
unsigned int Password,Count;
void main()
{
LCD_Init();
LCD_ShowString(1,1,"Password:");
while(1)
{
KeyNum=MatrixKey();
if(KeyNum)//KeyNum!=0
//按键按下了再进行操作
{
if(KeyNum<=10)//如果s1-s10按键按下,输入密码
{
if(Count<4)//如果输入次数小于4
{
Password*=10;
Password+=KeyNum%10;//把10转换成0
//获取一位密码
Count++;
}
LCD_ShowNum(2,1,Password,4);//更新显示
}
if(KeyNum==11)//s11为确认键
{
if(Password==2345)//等于正确密码,显示ok
{
LCD_ShowString(1,14,"ok ");
Password=0;
Count=0;
LCD_ShowNum(2,1,Password,4);//更新显示
}
else
{
LCD_ShowString(1,14,"no");
Password=0;
Count=0;
LCD_ShowNum(2,1,Password,4);//更新显示
}
}
if(KeyNum==12)
{
Password=0;
Count=0;
LCD_ShowNum(2,1,Password,4);//更新显示
}
}
}
}