本帖最后由 lxl_51h 于 2020-5-22 23:14 编辑
分享电子密码锁项目
第一次发帖，分享电子密码锁项目。关键代码段注释详尽。 仿真视频如下连接：
单片机源程序如下:
- #include <reg52.h>
- #include <intrins.h>
- #include "lxl_24C02C.h"
- #include "uart.h"
- #include "LCD1602.h"
- #include <keypad44.h>
- sbit greenled=P2^3; //Enter the right passwords,green led will lighting.
- sbit lock=P2^4; //Enter the right passwords,electronic lock will unlock.
- sbit redled=P2^5; //Enter the wrong passwords,red led will lighting.
- void show_base_infromation() //show something personal information on the screen of LCD1206.just delay for a moment than cleanning all screen.
- {
- uchar i;
- LCMDisplayString(0,0,"Design:LiXinLong");
- LCMDisplayString(1,0,"My ID:208171421");
- for(i=0;i<4;i++)keypad_delay(65535); //delay for a moment
- LCMClear(); //clean all screen.
- }
- void set_init_password() //set users' initialize passwords.
- {
- Master_writeByte(1,1); //The user 1 ,password:0001,password saved in register 1 of 24C02C.
- Master_writeByte(2,2); //The user 2 ,password:0002,password saved in register 2 of 24C02C.
- Master_writeByte(3,3); //The user 3 ,password:0003,password saved in register 3 of 24C02C.
- }
- int get_user_password(uchar i)//Get users' password ,i is the register number of the specific user.
- {
- int read=Master_readByte(i);//read the appointed register.
- return _cror_(read,8); //translated the value to int,and return the value.
- }
- void main()
- {
-
- uchar presstimes=0; //the register keep user's press times,maximum are 4,because the munber of password bits are defined as 4.
- uchar enter_times=0; //if user enter wrong password ,the register keep user's press times of "Enter",maximum are 3,beyond 3 account will locked(forbid to enter any number.).
- bit changepswd_state=0; //flage bit of user pressed "Reset password" key,1:pressed,0:not pressed.
- bit change_use1=0; //flage bit of user1 entered the old password correctly,and input the new passwords done.
- bit change_use2=0; //*****************************similar to change_use1***********************************
- bit change_use3=0; //*****************************similar to change_use1***********************************
- bit beyond3times=1; //flage bit of users' entered the wrong password beyond 3 times.1: not beyond,0:beyond.
-
- int readkeypad; //the register keep the keypad return value.
- int keypadvalue=0; //the register keep the value when 4 times pressed.
- int press1,press2,press3,press4; //press1:the value of 1st keypad return value multiple oppointed scale.press2-3 are similar to this.
- UartInit(); //initialize the USART for printf() to debug.
- LCMInit(); //initialize the LCD1206.
- printf("\nshow some \npersonal \ninfromation!\n");
- show_base_infromation();
- printf("\nplease enter your\npassword\n");
- keypad_delay(65535);
- set_init_password();
- LCMDisplayString(0,0,"Input pswd:");
- LCMDisplayString(1,0,"You error 0 Time");
-
- while(1)
- {
- readkeypad=key_scan();
- if(((readkeypad<10)||(readkeypad==14)||(readkeypad==13))&&beyond3times)//allowed press 0-9,"clean" or "enter" when account not lock(wrong password not beyond 3 times).
- {
- presstimes=presstimes+1;
- switch(presstimes)
- {
- case 1: //the 1st bit of 4bits password.
- {
- press1=readkeypad*1000;
- LCMDisplayString(0,11,"*");
- printf("pressed %d\n",readkeypad);
- }break;
- case 2: //the 2nd bit of 4bits password.
- {
- press2=readkeypad*100;
- LCMDisplayString(0,11,"**");
- printf("pressed %d\n",readkeypad);
- }break;
- case 3: //the 3rd bit of 4bits password.
- {
- press3=readkeypad*10;
- LCMDisplayString(0,11,"***");
- printf("pressed %d\n",readkeypad);
- }break;
- case 4: //the 4th bit of 4bits password.
- {
- press4=readkeypad;
- LCMDisplayString(0,11,"****");
- printf("pressed %d\n\n",readkeypad);
- }break;
- default:break;
- }
- }
-
- if((presstimes<=5)&&(readkeypad>11)) //Entered 4bits password,checking whether "Enter" or "Clean" pressed.
- {
- switch(readkeypad)
- {
- case 14: //pressed 'Enter' key
- {
- keypadvalue=press1+press2+press3+press4;
- presstimes=0;
- if(enter_times<3)LCMDisplayString(0,11," ");
- if(change_use1)
- {
- Master_writeByte(1,keypadvalue);
- change_use1=0;
- LCMClear();
- LCMDisplayString(0,0,"Input pswd:");
- LCMDisplayString(1,0,"You error 0 Time");
- }
- if(change_use2)
- {
- Master_writeByte(2,keypadvalue);
- change_use2=0;LCMClear();
- LCMDisplayString(0,0,"Input pswd:");
- LCMDisplayString(1,0,"You error 0 Time");
- }
- if(change_use3)
- {
- Master_writeByte(3,keypadvalue);
- change_use3=0;
- LCMClear();
- LCMDisplayString(0,0,"Input pswd:");
- LCMDisplayString(1,0,"You error 0 Time");
- }//printf("pswd changed!\n");
-
- if((keypadvalue==get_user_password(1))||(keypadvalue==get_user_password(2))||(keypadvalue==get_user_password(3)))//matching password saved in 24C02C,only password are correct can match successful.
- {
- greenled=0;
- lock=0;
- redled=1;
- printf("\nWelcome You to\nGo Home!\n");
- enter_times=0;
- LCMDisplayChar(1,10,'0');
- }else //match password failed.
- {
- greenled=1;
- lock=1;
- redled=0;
- printf("\nPasswords error\nplease try\nagain!\n");
- enter_times++;
- switch(enter_times) //show times of enter wrong password.
- {
- case 0:LCMDisplayChar(1,10,'0');break;
- case 1:LCMDisplayChar(1,10,'1');break;
- case 2:LCMDisplayChar(1,10,'2');break;
- default: //enter wrong password 3 times,lock the account!
- {
- beyond3times=0;
- LCMClear();
- LCMDisplayString(0,0,"Account Locked!");
- LCMDisplayString(1,0,"Call 1401856153");
- printf("\nInput error\nbeyond 3 times\nthe account\nlocked!\nplease Contact \nadministrator\n");
- }break;
- }
- }
- }break;
- case 13: //press 'Clean' key,clean all entered numbers.
- {
- presstimes=0;
- LCMDisplayString(0,11," ");
- greenled=1;
- lock=1;
- printf("\nPressed Clean!\n");
-
- }break;
- default:break;
- }
-
- }
-
- if((presstimes==5)&&(readkeypad<10))//if 5th entered is a number of 0-9.clean all entered passwords,because passwords were designed 4bits.
- {
- presstimes=0;
- LCMDisplayString(0,11," ");
- printf("\nPlease Reenter Your\nPassword\n");
- }
-
- if(readkeypad==12) //Press "reset password" key,enter to reset passwords process while loop.
- {
- changepswd_state=1;
- LCMClear();
- LCMDisplayString(0,0,"Enter Old pswd:");
- printf("\nEnter your old\npswd now:\n");
- }else changepswd_state=0;
-
- while(changepswd_state) //Reset passwords while loop
- {
- readkeypad=key_scan();
- if((readkeypad<10)||(readkeypad==14)||(readkeypad==13))
- {
- presstimes=presstimes+1;
- switch(presstimes)
- {
- case 1:
- {
- press1=readkeypad*1000;
- LCMDisplayString(1,0,"*");
- printf("pressed %d\n",readkeypad);
- }break;
- case 2:
- {
- press2=readkeypad*100;
- LCMDisplayString(1,0,"**");
- printf("pressed %d\n",readkeypad);
- }break;
- case 3:
- {
- press3=readkeypad*10;
- LCMDisplayString(1,0,"***");
- printf("pressed %d\n",readkeypad);
- }break;
- case 4:
- {
- press4=readkeypad;
- LCMDisplayString(1,0,"****");
- printf("pressed %d\n\n",readkeypad);
- }break;
- default:break;
- }
- }
-
- if((presstimes<=5)&&(readkeypad>11))
- {
- switch(readkeypad)
- {
- case 14: //press 'enter' key
- {
- keypadvalue=press1+press2+press3+press4;
- presstimes=0;
- LCMDisplayString(1,0," ");
- if(keypadvalue==get_user_password(1)) //matched user1's passwords.
- {
- LCMClear();
- LCMDisplayString(1,0,"Enter New pswd:");
- presstimes=0;
- change_use1=1;
- changepswd_state=0;
- }else if(keypadvalue==get_user_password(2)) //matched user2's passwords.
- {
- LCMClear();
- LCMDisplayString(1,0,"Enter New pswd:");
- presstimes=0;
- change_use2=1;
- changepswd_state=0;
- ……………………
- …………限于本文篇幅 余下代码请从51黑下载附件…………
所有资料51hei提供下载:
PASSWORDLOCK.zip
(642.67 KB, 下载次数: 205)
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