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#include<reg51.h>
#include<stdio.h>
unsigned char password[6]={0,1,2,3,4,5,};//初始密碼
sbit LED1=P1^3;
sbit LED2=P1^4;
sbit LED3=P1^5;
sbit Beep=P0^5;
sbit RS = P1^0;
sbit RW = P1^1;
sbit EN = P1^2;
#define CHECK_BUSY
#define RS_CLR RS=0
#define RS_SET RS=1
#define RW_CLR RW=0
#define RW_SET RW=1
#define EN_CLR EN=0
#define EN_SET EN=1
#define DataPort P3
void LCD_Write_Com(unsigned char com) ;
void LCD_Write_Data(unsigned char Data) ;
void LCD_Write_String(unsigned char x,unsigned char y,unsigned char *s) ;
void LCD_Write_Char(unsigned char x,unsigned char y,unsigned char Data) ;
void LCD_Init(void) ;
/*------------------------------------------------
uS延時函數(shù)，含有輸入?yún)?shù) unsigned char t，無返回值
------------------------------------------------*/
void DelayUs2x(unsigned char t)
{
while(--t);
}
void DelayMs(unsigned char t)
{
while(t--)
{
//大致延時1mS
DelayUs2x(245);
DelayUs2x(245);
}
}
unsigned char KeyScan(void)
{
unsigned n,key,key_r,key_c;
n=0;
P2=0x70;
key_c=P2;
key_c=key_c & 0x70;
if(key_c!=0x70)
{
DelayMs(30);
if(key_c!=0x70)
{
key_c=key_c | 0x07;
P2=key_c;
key_r=P2;
key_r=key_r & 0x07;
key_c=key_c & 0x70;
key=key_c+key_r;
key=key & 0x77;
P2=0x70; //等待本次按鍵結(jié)束
while(P2!=0x70);
return key;
}
}
return 0x70;
}
/*------------------------------------------------
按鍵值處理函數(shù)，返回掃鍵值
------------------------------------------------*/
unsigned char KeyPro(void)
{
int n=9;
switch(KeyScan())
{
{
case 0x66: n=0;break;
case 0X56: n=1;break;
case 0X36: n=2;break;
case 0X65: n=3;break;
case 0X55: n=4;break;
case 0X35: n=5;break;
case 0X63: n=6;break;
case 0X53: n=7;break;
case 0X33: n=8;break;
default : break;
}
DelayMs(20);
}
return n;
}
/*------------------------------------------------
寫入命令函數(shù)
------------------------------------------------*/
void LCD_Write_Com(unsigned char com)
{
DelayMs(5);
RS_CLR;
RW_CLR;
EN_SET;
DataPort= com;
;
EN_CLR;
}
/*------------------------------------------------
寫入數(shù)據(jù)函數(shù)
------------------------------------------------*/
void LCD_Write_Data(unsigned char Data)
{
DelayMs(5);
RS_SET;
RW_CLR;
EN_SET;
DataPort= Data;
;
EN_CLR;
}
/*------------------------------------------------
寫入字符串函數(shù)
------------------------------------------------*/
void LCD_Write_String(unsigned char x,unsigned char y,unsigned char *s)
{
while (*s)
{
LCD_Write_Char(x,y,*s);
s ++; x++;
}
}
/*------------------------------------------------
寫入字符函數(shù)
------------------------------------------------*/
void LCD_Write_Char(unsigned char x,unsigned char y,unsigned char Data)
{
if (y == 0)
{
LCD_Write_Com(0x80 + x);
}
else
{
LCD_Write_Com(0xC0 + x);
}
LCD_Write_Data( Data);
}
/*------------------------------------------------
初始化函數(shù)
------------------------------------------------*/
void LCD_Init(void)
{
LCD_Write_Com(0x38);
LCD_Write_Com(0x08); /*顯示關閉*/
LCD_Write_Com(0x01); /*顯示清屏*/
LCD_Write_Com(0x06); /*顯示光標移動設置*/
LCD_Write_Com(0x0C); /*顯示開及光標設置*/
}
main()
{
unsigned char num,j;
int i=0,a=0,value=9;
unsigned char temp[6];
bit Flag;
LCD_Init(); //初始化液晶屏
DelayMs(10); //延時用于穩(wěn)定，可以去掉
LCD_Write_String(0,0," chose mode "); //寫入第一行信息，主循環(huán)中不再更改此信息，所以在while之前寫入
LCD_Write_String(0,1," input 6or7or8 "); //寫入第二行信息
while (1) //主循環(huán)
{
num=KeyPro(); //掃描鍵盤
if(num!=9) //如果掃描是按鍵有效值則進行處理
{
if(num==8)
{
LCD_Write_String(0,0,"password: ");
LCD_Write_String(0,1," ");
LED1=0;
LED2=1;
LED3=1;
}
if(num==7)
{
i--;
LCD_Write_Char(i,1,' ');
}
if(num==6)
{
LCD_Write_String(0,0,"Set password!");
LCD_Write_String(0,1," ");
LED1=1;
LED2=0;
LED3=1;
for(j=0;j<6;j++)
{
while(value==9)
{
value = KeyPro();
}
password[j]= value ;
value=9;
LCD_Write_Char(j,1, password[j]+'0');
}
LCD_Write_String(0,0,"Set sucessd!");
LCD_Write_String(0,1," ");
}
if(num<6) //密碼是6位，大于6位時不再輸入按鍵值
{
temp[i]=num;
LCD_Write_Char(i,1,num+'0');
i++; //輸入數(shù)值累加
}
if(i==6)//6位后的按鍵不輸入數(shù)值，相當于確認按鍵（任意按鍵即可）
{
i=0; //計數(shù)器復位
Flag=1;//先把比較位置1
for(j=0;j<6;j++)//循環(huán)比較6個數(shù)值，如果有一個不等則最終Flag值為0
Flag=Flag&&(temp[j]==password[j]);//比較輸入值和已有密碼
if(Flag)//如果比較全部相同，標志位置1
{
LCD_Write_String(0,1,"Right Open!");//密碼正確顯示的信息
}
else
{
LCD_Write_String(0,1,"Wrong Retry!");//密碼錯誤，提示重新輸入
DelayMs(255);
DelayMs(255);
DelayMs(255);
DelayMs(255);
LCD_Write_String(0,1," ");
a++;
if(a>=3)
{
LCD_Write_String(0,0,"not allow input");
LCD_Write_String(0,1,"Wrong Waring!");
LED1=1;LED2=1;LED3=0;
Beep=0;
while(1);
……………………
…………限于本文篇幅余下代碼請從51黑下載附件…………

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