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#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;
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