[F.Abdelaziz]

مشروع قفل إلكترونى برقم سرى قابل للتغيير والتطوير كتطبيق على LCD&Keypad&EEPROM


الدائرة الكهربية :

[F.Abdelaziz]

الأجزاء :
1- دائرة الأمداد بالقدرة

2- دائرة الميكروكونترولر

3- وحدة العرض LCD

4- لوحة المفاتيح Keypad

5- دوائر ربط الإخراج Output Interface

[F.Abdelaziz]

كود البرنامج :
الجزء الأول : التعليقات وإعلان المتغيرات

/* Project : Digital Lock Security
Tested on 16F877A * 4MHz....4x3 Keypad 16x2 LCD
* Written and compiled successfully with mikroC PRO
* The code is built in a modular style to allow a user to find ways to modifyp roject.
* In start the D Lock programs loads with a default code of "2345"
*Format is *2345# which can be enter to unlock the door, 
* The code cam be change by entering the master code in the format *23455# new 4 digit code .
*/
// Variables Declaration
unsigned i=0;
unsigned kp;
char code1[10];                      //Hold Key code variable
char user1[4];                       //Hold current EEPROM Code
char msg1[16] = "Welcome .......";
char msg2[16] = "Enter Code";
char msg3[16] = "Access Granted";
char msg4[16] = "Access Denied";
char msg5[16] = "Enter New Code";
// Keypad module connections
char  keypadPort at PORTD;
// End Keypad module connections
// LCD module connections
sbit LCD_RS at RB2_bit;
sbit LCD_EN at RB3_bit;
sbit LCD_D4 at RB4_bit;
sbit LCD_D5 at RB5_bit;
sbit LCD_D6 at RB6_bit;
sbit LCD_D7 at RB7_bit;
sbit LCD_RS_Direction at TRISB2_bit;
sbit LCD_EN_Direction at TRISB3_bit;
sbit LCD_D4_Direction at TRISB4_bit;
sbit LCD_D5_Direction at TRISB5_bit;
sbit LCD_D6_Direction at TRISB6_bit;
sbit LCD_D7_Direction at TRISB7_bit;
// End LCD module connection
sbit LED_G at PORTB.B0;
sbit LED_R at PORTB.B1;
sbit BUZZER at PORTC.B0;

[F.Abdelaziz]

الجزء الثانى : الدوال :
دالة إدخال الأرقام من لوحة المفاتيح :

void code_enter()
{
kp = 0;// Reset key code variable
// Wait for key to be pressed and released
do
kp = Keypad_Key_Click();// Store key code in kp variable
while (!kp);
// Prepare value for output, transform key to it's ASCII value
switch (kp)
{
case  1: kp = '1'; break; // 1
case  2: kp = '2'; break; // 2
case  3: kp = '3'; break; // 3
case  5: kp = '4'; break; // 4
case  6: kp = '5'; break; // 5
case  7: kp = '6'; break; // 6
case  9: kp = '7'; break; // 7
case 10: kp = '8'; break; // 8
case 11: kp = '9'; break; // 9
case 13: kp = 42; break; // *
case 14: kp = 48; break; // 0
case 15: kp = 35; break; // #
}
code1[i] = kp;
//Lcd_Chr(2, i+1, code1[i]);// Print key ASCII value on Lcd
Lcd_Chr(2, i+1, '*');// Replace key ASCII value by "*" on Lcd
i++;
 
}

[F.Abdelaziz]

دالة التأخير :

void delay_20ms()
{
delay_ms(20);
}

[F.Abdelaziz]

دالة قراءة الكود من ذاكرة EEPROM

void code_read()  //Read data from EEPROM
{
delay_20ms();
user1[0] = EEPROM_Read(0x00);          // Read data from address 0
delay_20ms();
user1[1] = EEPROM_Read(0x01);          // Read data from address 2
delay_20ms();
user1[2] = EEPROM_Read(0x02);          // Read data from address 4
delay_20ms();
user1[3] = EEPROM_Read(0x03);          // Read data from address 8
delay_20ms();
}

[F.Abdelaziz]

دالة كتابة كود على ذاكرة EEPROM

void code_write() //Write data from EEPROM
{
delay_20ms();
EEPROM_Write(0x00,code1[0]);               // Write some data at address 00
delay_20ms();
EEPROM_Write(0x01,code1[1]);               // Write some data at address 02
delay_20ms();
EEPROM_Write(0x02,code1[2]);               // Write some data at address 04
delay_20ms();
EEPROM_Write(0x03,code1[3]);               // Write some data at address 08
}

[F.Abdelaziz]

دالة تغيير الكود

void change_code()
{
 Lcd_Cmd(_LCD_CLEAR);                      // Clear display
 Lcd_Out(1, 1, "Enter New Code");
 i=0;
 code_enter();
 code_enter();
 code_enter();
 code_enter();
 code_write();
 code_read();
}