主要功能：
1、6位密碼開鎖
可以修改用戶密碼和管理員密碼
斷電記憶文章來源：http://www.zghlxwxcb.cn/news/detail-504506.html
3次錯(cuò)誤報(bào)警鎖住鍵盤文章來源地址http://www.zghlxwxcb.cn/news/detail-504506.html
#include <REG51.h>
#include<intrins.h>
#define LCM_Data P0
#define uchar unsigned char
#define uint unsigned int
#define w 6 //定義密碼位數(shù)
sbit lcd1602_rs=P2^5;
sbit lcd1602_rw=P2^6;
sbit lcd1602_en=P2^7;
sbit Scl=P2^0; //24C02串行時(shí)鐘
sbit Sda=P2^1; //24C02串行數(shù)據(jù)
sbit ALAM = P2^4; //報(bào)警
sbit KEY = P3^6; //開鎖
sbit open_led=P2^2; //開鎖指示燈
bit operation=0; //操作標(biāo)志位
bit pass=0; //密碼正確標(biāo)志
bit ReInputEn=0; //重置輸入充許標(biāo)志
bit s3_keydown=0; //3秒按鍵標(biāo)志位
bit key_disable=0; //鎖定鍵盤標(biāo)志
unsigned char countt0,second; //t0中斷計(jì)數(shù)器,秒計(jì)數(shù)器
void Delay5Ms(void);
unsigned char code a[]={0xFE,0xFD,0xFB,0xF7}; //控盤掃描控制表
unsigned char code start_line[] = {"password: "};
unsigned char code name[] = {"===Coded Lock==="}; //顯示名稱
unsigned char code Correct[] = {" correct "}; //輸入正確
unsigned char code Error[] = {" error "}; //輸入錯(cuò)誤
unsigned char code codepass[] = {" pass "};
unsigned char code LockOpen[] = {" open "}; //OPEN
unsigned char code SetNew[] = {"SetNewWordEnable"};
unsigned char code Input[] = {"input: "}; //INPUT
unsigned char code ResetOK[] = {"ResetPasswordOK "};
unsigned char code initword[] = {"Init password..."};
unsigned char code Er_try[] = {"error,try again!"};
unsigned char code again[] = {"input again "};
unsigned char InputData[6]; //輸入密碼暫存區(qū)
unsigned char CurrentPassword[6]={1,3,1,4,2,0}; //當(dāng)前密碼值
unsigned char TempPassword[6];
unsigned char N=0; //密碼輸入位數(shù)記數(shù)
unsigned char ErrorCont; //錯(cuò)誤次數(shù)計(jì)數(shù)
unsigned char CorrectCont; //正確輸入計(jì)數(shù)
unsigned char ReInputCont; //重新輸入計(jì)數(shù)
unsigned char code initpassword[6]={0,0,0,0,0,0};
//=====================5ms延時(shí)==============================
void Delay5Ms(void)
{
unsigned int TempCyc = 5552;
while(TempCyc--);
}
//===================400ms延時(shí)==============================
void Delay400Ms(void)
{
unsigned char TempCycA = 5;
unsigned int TempCycB;
while(TempCycA--)
{
TempCycB=7269;
while(TempCycB--);
}
}
//=============================================================================================
//================================24C02========================================================
//=============================================================================================
void mDelay(uint t) //延時(shí)
{
uchar i;
while(t--)
{
for(i=0;i<125;i++)
{;}
}
}
void Nop(void) //空操作
{
_nop_();
_nop_();
_nop_();
_nop_();
}
/*起始條件*/
void Start(void)
{
Sda=1;
Scl=1;
Nop();
Sda=0;
Nop();
}
/*停止條件*/
void Stop(void)
{
Sda=0;
Scl=1;
Nop();
Sda=1;
Nop();
}
/*應(yīng)答位*/
void Ack(void)
{
Sda=0;
Nop();
Scl=1;
Nop();
Scl=0;
}
/*反向應(yīng)答位*/
void NoAck(void)
{
Sda=1;
Nop();
Scl=1;
Nop();
Scl=0;
}
/*發(fā)送數(shù)據(jù)子程序，Data為要求發(fā)送的數(shù)據(jù)*/
void Send(uchar Data)
{
uchar BitCounter=8;
uchar temp;
do
{
temp=Data;
Scl=0;
Nop();
if((temp&0x80)==0x80)
Sda=1;
else
Sda=0;
Scl=1;
temp=Data<<1;
Data=temp;
BitCounter--;
}
while(BitCounter);
Scl=0;
}
/*讀一字節(jié)的數(shù)據(jù)，并返回該字節(jié)值*/
uchar Read(void)
{
uchar temp=0;
uchar temp1=0;
uchar BitCounter=8;
Sda=1;
do{
Scl=0;
Nop();
Scl=1;
Nop();
if(Sda)
temp=temp|0x01;
else
temp=temp&0xfe;
if(BitCounter-1)
{
temp1=temp<<1;
temp=temp1;
}
BitCounter--;
}
while(BitCounter);
return(temp);
}
void WrToROM(uchar Data[],uchar Address,uchar Num)
{
uchar i;
uchar *PData;
PData=Data;
for(i=0;i<Num;i++)
{
Start();
Send(0xa0);
Ack();
Send(Address+i);
Ack();
Send(*(PData+i));
Ack();
Stop();
mDelay(20);
}
}
void RdFromROM(uchar Data[],uchar Address,uchar Num)
{
uchar i;
uchar *PData;
PData=Data;
for(i=0;i<Num;i++)
{
Start();
Send(0xa0);
Ack();
Send(Address+i);
Ack();
Start();
Send(0xa1);
Ack();
*(PData+i)=Read();
Scl=0;
NoAck();
Stop();
}
}
//==================================================================================================
//=======================================LCD1602====================================================
//==================================================================================================
#define yi 0x80 //LCD第一行的初始位置,因?yàn)長(zhǎng)CD1602字符地址首位D7恒定為1（100000000=80）
#define er 0x80+0x40 //LCD第二行初始位置（因?yàn)榈诙械谝粋€(gè)字符位置地址是0x40）
//----------------延時(shí)函數(shù)，后面經(jīng)常調(diào)用----------------------
void delay(uint xms)//延時(shí)函數(shù)，有參函數(shù)
{
uint x,y;
for(x=xms;x>0;x--)
for(y=110;y>0;y--);
}
//--------------------------寫指令---------------------------
write_1602com(uchar com)//****液晶寫入指令函數(shù)****
{
lcd1602_rs=0;//數(shù)據(jù)/指令選擇置為指令
lcd1602_rw=0; //讀寫選擇置為寫
P0=com;//送入數(shù)據(jù)
delay(1);
lcd1602_en=1;//拉高使能端，為制造有效的下降沿做準(zhǔn)備
delay(1);
lcd1602_en=0;//en由高變低，產(chǎn)生下降沿，液晶執(zhí)行命令
}
//-------------------------寫數(shù)據(jù)-----------------------------
write_1602dat(uchar dat)//***液晶寫入數(shù)據(jù)函數(shù)****
{
lcd1602_rs=1;//數(shù)據(jù)/指令選擇置為數(shù)據(jù)
lcd1602_rw=0; //讀寫選擇置為寫
P0=dat;//送入數(shù)據(jù)
delay(1);
lcd1602_en=1; //en置高電平，為制造下降沿做準(zhǔn)備
delay(1);
lcd1602_en=0; //en由高變低，產(chǎn)生下降沿，液晶執(zhí)行命令
}
//-------------------------初始化-------------------------
void lcd_init(void)
{
write_1602com(0x38);//設(shè)置液晶工作模式，意思：16*2行顯示，5*7點(diǎn)陣，8位數(shù)據(jù)
write_1602com(0x0c);//開顯示不顯示光標(biāo)
write_1602com(0x06);//整屏不移動(dòng)，光標(biāo)自動(dòng)右移
write_1602com(0x01);//清顯示
}
//========================================================================================
//=========================================================================================
//==============將按鍵值編碼為數(shù)值=========================
unsigned char coding(unsigned char m)
{
unsigned char k;
switch(m)
{
case (0x18): k=1;break;
case (0x28): k=2;break;
case (0x48): k=3;break;
case (0x88): k='A';break;
case (0x14): k=4;break;
case (0x24): k=5;break;
case (0x44): k=6;break;
case (0x84): k='B';break;
case (0x12): k=7;break;
case (0x22): k=8;break;
case (0x42): k=9;break;
case (0x82): k='C';break;
case (0x11): k='*';break;
case (0x21): k=0;break;
case (0x41): k='#';break;
case (0x81): k='D';break;
}
return(k);
}
//=====================按鍵檢測(cè)并返回按鍵值===============================
unsigned char keynum(void)
{
unsigned char row,col,i;
P1=0xf0;
if((P1&0xf0)!=0xf0)
{
Delay5Ms();
Delay5Ms();
if((P1&0xf0)!=0xf0)
{
row=P1^0xf0; //確定行線
i=0;
P1=a[i]; //精確定位
while(i<4)
{
if((P1&0xf0)!=0xf0)
{
col=~(P1&0xff); //確定列線
break; //已定位后提前退出
}
else
{
i++;
P1=a[i];
}
}
}
else
{
return 0;
}
while((P1&0xf0)!=0xf0);
return (row|col); //行線與列線組合后返回
}
else return 0; //無鍵按下時(shí)返回0
}
//=======================一聲提示音，表示有效輸入========================
void OneAlam(void)
{
ALAM=0;
Delay5Ms();
ALAM=1;
}
//========================二聲提示音，表示操作成功========================
void TwoAlam(void)
{
ALAM=0;
Delay5Ms();
ALAM=1;
Delay5Ms();
ALAM=0;
Delay5Ms();
ALAM=1;
}
//========================三聲提示音,表示錯(cuò)誤========================
void ThreeAlam(void)
{
ALAM=0;
Delay5Ms();
ALAM=1;
Delay5Ms();
ALAM=0;
Delay5Ms();
ALAM=1;
Delay5Ms();
ALAM=0;
Delay5Ms();
ALAM=1;
}
//=====================顯示輸入的N個(gè)數(shù)字，用H代替以便隱藏============================
void DisplayOne(void)
{
// DisplayOneChar(9+N,1,'*');
write_1602com(yi+5+N);
write_1602dat('*');
}
//=======================顯示提示輸入=========================
void DisplayChar(void)
{
unsigned char i;
if(pass==1)
{
//DisplayListChar(0,1,LockOpen);
write_1602com(er);
for(i=0;i<16;i++)
{
write_1602dat(LockOpen[i]);
}
}
else
{
if(N==0)
{
//DisplayListChar(0,1,Error);
write_1602com(er);
for(i=0;i<16;i++)
{
write_1602dat(Error[i]);
}
}
else
{
//DisplayListChar(0,1,start_line);
write_1602com(er);
for(i=0;i<16;i++)
{
write_1602dat(start_line[i]);
}
}
}
}
void DisplayInput(void)
{
unsigned char i;
if(CorrectCont==1)
{
//DisplayListChar(0,0,Input);
write_1602com(er);
for(i=0;i<16;i++)
{
write_1602dat(Input[i]);
}
}
}
//========================重置密碼==================================================
//==================================================================================
void ResetPassword(void)
{
unsigned char i;
unsigned char j;
if(pass==0)
{
pass=0;
DisplayChar();
ThreeAlam();
}
else
{
if(ReInputEn==1)
{
if(N==6)
{
ReInputCont++;
if(ReInputCont==2)
{
for(i=0;i<6;)
{
if(TempPassword[i]==InputData[i]) //將兩次輸入的新密碼作對(duì)比
i++;
else
{
//DisplayListChar(0,1,Error);
write_1602com(er);
for(j=0;j<16;j++)
{
write_1602dat(Error[j]);
}
ThreeAlam(); //錯(cuò)誤提示
pass=0;
ReInputEn=0; //關(guān)閉重置功能，
ReInputCont=0;
DisplayChar();
break;
}
}
if(i==6)
{
//DisplayListChar(0,1,ResetOK);
write_1602com(er);
for(j=0;j<16;j++)
{
write_1602dat(ResetOK[j]);
}
TwoAlam(); //操作成功提示
WrToROM(TempPassword,0,6); //將新密碼寫入24C02存儲(chǔ)
ReInputEn=0;
}
ReInputCont=0;
CorrectCont=0;
}
else
{
OneAlam();
//DisplayListChar(0, 1, again); //顯示再次輸入一次
write_1602com(er);
for(j=0;j<16;j++)
{
write_1602dat(again[j]);
}
for(i=0;i<6;i++)
{
TempPassword[i]=InputData[i]; //將第一次輸入的數(shù)據(jù)暫存起來
}
}
N=0; //輸入數(shù)據(jù)位數(shù)計(jì)數(shù)器清零
}
}
}
}
//=======================輸入密碼錯(cuò)誤超過三過，報(bào)警并鎖死鍵盤======================
void Alam_KeyUnable(void)
{
P1=0x00;
{
ALAM=~ALAM;
Delay5Ms();
}
}
//=======================取消所有操作============================================
void Cancel(void)
{
unsigned char i;
unsigned char j;
//DisplayListChar(0, 1, start_line);
write_1602com(er);
for(j=0;j<16;j++)
{
write_1602dat(start_line[j]);
}
TwoAlam(); //提示音
for(i=0;i<6;i++)
{
InputData[i]=0;
}
KEY=1; //關(guān)閉鎖
ALAM=1; //報(bào)警關(guān)
operation=0; //操作標(biāo)志位清零
pass=0; //密碼正確標(biāo)志清零
ReInputEn=0; //重置輸入充許標(biāo)志清零
ErrorCont=0; //密碼錯(cuò)誤輸入次數(shù)清零
CorrectCont=0; //密碼正確輸入次數(shù)清零
ReInputCont=0; //重置密碼輸入次數(shù)清零
open_led=1;
s3_keydown=0;
key_disable=0;
N=0; //輸入位數(shù)計(jì)數(shù)器清零
}
//==========================確認(rèn)鍵，并通過相應(yīng)標(biāo)志位執(zhí)行相應(yīng)功能===============================
void Ensure(void)
{
unsigned char i,j;
RdFromROM(CurrentPassword,0,6); //從24C02里讀出存儲(chǔ)密碼
if(N==6)
{
if(ReInputEn==0) //重置密碼功能未開啟
{
for(i=0;i<6;)
{
if(CurrentPassword[i]==InputData[i])
{
i++;
}
else
{
ErrorCont++;
if(ErrorCont==3) //錯(cuò)誤輸入計(jì)數(shù)達(dá)三次時(shí)，報(bào)警并鎖定鍵盤
{
write_1602com(er);
for(i=0;i<16;i++)
{
write_1602dat(Error[i]);
}
do
Alam_KeyUnable();
while(1);
}
else
{
TR0=1; //開啟定時(shí)
key_disable=1; //鎖定鍵盤
pass=0;
break;
}
}
}
if(i==6)
{
CorrectCont++;
if(CorrectCont==1) //正確輸入計(jì)數(shù)，當(dāng)只有一次正確輸入時(shí)，開鎖，
{
//DisplayListChar(0,1,LockOpen);
write_1602com(er);
for(j=0;j<16;j++)
{
write_1602dat(LockOpen[j]);
}
TwoAlam(); //操作成功提示音
KEY=0; //開鎖
pass=1; //置正確標(biāo)志位
TR0=1; //開啟定時(shí)
open_led=0; //開鎖指示燈亮
for(j=0;j<6;j++) //將輸入清除
{
InputData[i]=0;
}
}
else //當(dāng)兩次正確輸入時(shí)，開啟重置密碼功能
{
//DisplayListChar(0,1,SetNew);
write_1602com(er);
for(j=0;j<16;j++)
{
write_1602dat(SetNew[j]);
}
TwoAlam(); //操作成功提示
ReInputEn=1; //允許重置密碼輸入
CorrectCont=0; //正確計(jì)數(shù)器清零
}
}
else //=========================當(dāng)?shù)谝淮问褂没蛲浢艽a時(shí)可以用131420對(duì)其密碼初始化============
{
if((InputData[0]==1)&&(InputData[1]==3)&&(InputData[2]==1)&&(InputData[3]==4)&&(InputData[4]==2)&&(InputData[5]==0))
{
WrToROM(initpassword,0,6); //強(qiáng)制將初始密碼寫入24C02存儲(chǔ)
//DisplayListChar(0,1,initword); //顯示初始化密碼
write_1602com(er);
for(j=0;j<16;j++)
{
write_1602dat(initword[j]);
}
TwoAlam();
Delay400Ms();
TwoAlam();
N=0;
}
else
{
//DisplayListChar(0,1,Error);
write_1602com(er);
for(j=0;j<16;j++)
{
write_1602dat(Error[j]);
}
ThreeAlam(); //錯(cuò)誤提示音
pass=0;
}
}
}
else //當(dāng)已經(jīng)開啟重置密碼功能時(shí)，而按下開鎖鍵，
{
//DisplayListChar(0,1,Er_try);
write_1602com(er);
for(j=0;j<16;j++)
{
write_1602dat(Er_try[j]);
}
ThreeAlam();
}
}
else
{
//DisplayListChar(0,1,Error);
write_1602com(er);
for(j=0;j<16;j++)
{
write_1602dat(Error[j]);
}
ThreeAlam(); //錯(cuò)誤提示音
pass=0;
}
N=0; //將輸入數(shù)據(jù)計(jì)數(shù)器清零，為下一次輸入作準(zhǔn)備
operation=1;
}
//==============================主函數(shù)===============================
void main(void)
{
unsigned char KEY,NUM;
unsigned char i,j;
P1=0xFF;
TMOD=0x11;
TL0=0xB0;
TH0=0x3C;
EA=1;
ET0=1;
TR0=0;
Delay400Ms(); //啟動(dòng)等待，等LCM講入工作狀態(tài)
lcd_init(); //LCD初始化
write_1602com(yi);//日歷顯示固定符號(hào)從第一行第0個(gè)位置之后開始顯示
for(i=0;i<16;i++)
{
write_1602dat(name[i]);//向液晶屏寫日歷顯示的固定符號(hào)部分
}
write_1602com(er);//時(shí)間顯示固定符號(hào)寫入位置，從第2個(gè)位置后開始顯示
for(i=0;i<16;i++)
{
write_1602dat(start_line[i]);//寫顯示時(shí)間固定符號(hào)，兩個(gè)冒號(hào)
}
write_1602com(er+9); //設(shè)置光標(biāo)位置
write_1602com(0x0f); //設(shè)置光標(biāo)為閃爍
Delay5Ms(); //延時(shí)片刻(可不要)
N=0; //初始化數(shù)據(jù)輸入位數(shù)
while(1)
{
if(key_disable==1)
Alam_KeyUnable();
else
ALAM=1; //關(guān)報(bào)警
KEY=keynum();
if(KEY!=0)
{
if(key_disable==1)
{
second=0;
}
else
{
NUM=coding(KEY);
{
switch(NUM)
{
case ('A'): ; break;
case ('B'): ; break;
case ('C'): ; break;
case ('D'): ResetPassword(); break; //重新設(shè)置密碼
case ('*'): Cancel(); break; //取消當(dāng)前輸入
case ('#'): Ensure(); break; //確認(rèn)鍵，
default:
{
//DisplayListChar(0,1,Input);
write_1602com(er);
for(i=0;i<16;i++)
{
write_1602dat(Input[i]);
}
operation=0;
if(N<6) //當(dāng)輸入的密碼少于6位時(shí)，接受輸入并保存，大于6位時(shí)則無效。
{
OneAlam(); //按鍵提示音
//DisplayOneChar(6+N,1,'*');
for(j=0;j<=N;j++)
{
write_1602com(er+6+j);
write_1602dat('*');
}
InputData[N]=NUM;
N++;
}
else //輸入數(shù)據(jù)位數(shù)大于6后，忽略輸入
{
N=6;
break;
}
}
}
}
}
}
}
}
//*********************************中斷服務(wù)函數(shù)**************************************
void time0_int(void) interrupt 1
{
TL0=0xB0;
TH0=0x3C;
//TR0=1;
countt0++;
if(countt0==20)
{
countt0=0;
second++;
if(pass==1)
{
if(second==1)
{
open_led=1; //關(guān)指示燈
TR0=0; //關(guān)定時(shí)器
TL0=0xB0;
TH0=0x3C;
second=0;
}
}
else
{
if(second==3)
{
TR0=0;
second=0;
key_disable=0;
s3_keydown=0;
TL0=0xB0;
TH0=0x3C;
}
else
TR0=1;
}
}
}到了這里，關(guān)于基于51單片機(jī)的電子密碼鎖的文章就介紹完了。如果您還想了解更多內(nèi)容，請(qǐng)?jiān)谟疑辖撬阉鱐OY模板網(wǎng)以前的文章或繼續(xù)瀏覽下面的相關(guān)文章，希望大家以后多多支持TOY模板網(wǎng)！
![基于51單片機(jī)的紅外密碼鎖設(shè)計(jì)[proteus仿真]](https://imgs.yssmx.com/Uploads/2024/02/831724-1.png)
