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<blockquote data-quote="Little DJ" data-source="post: 13235499" data-attributes="member: 320663">Digital Door Lock with PIC18F452<img src="http://1.bp.blogspot.com/-gLSzWoKjU2Y/UDDUFGvw4VI/AAAAAAAABPQ/XF_5HcZ6BeY/s320/ezon.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" />Now lets look at how to build a simple digital door lock using PIC 18F452. Here its required 16x2 LCD display to view the user instructions and other massages and also a 4x3 keypad to input unlock password. Circuit Diagram<img src="http://3.bp.blogspot.com/-9caWMpv0A7U/UDDu261SUuI/AAAAAAAABPg/l5J2U5ZQEkA/s400/D+Lock.JPG" alt="" class="fr-fic fr-dii fr-draggable " style="" />Here unlock output simulated using a LEDMikroC Code:unsigned short kp; char code1[10] ,user1[4];char msg1[20] = &quot;Initializing......&quot;,msg2[12] = &quot;Enter Code&quot;;char msg3[15] = &quot;Access Granted&quot;,msg4[15] = &quot;Access Denied&quot;;char msg5[15]&nbsp; = &quot;Enter New Code&quot;;int i=0,j;// Keypad module connectionschar&nbsp; keypadPort at PORTD;// End Keypad module connections// LCD module connectionssbit 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 connectionvoid code_enter(){kp = 0;&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; // Reset key code variable// Wait for key to be pressed and releaseddo//kp = Keypad_Key_Press();&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&nbsp; // Store key code in kp variablekp = Keypad_Key_Click();&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&nbsp; // Store key code in kp variablewhile (!kp);// Prepare value for output, transform key to it's ASCII valueswitch (kp)&nbsp;{&nbsp; case&nbsp; 1: kp = '1'; break; // 1&nbsp; case&nbsp; 2: kp = '2'; break; // 2&nbsp; case&nbsp; 3: kp = '3'; break; // 3&nbsp; case&nbsp; 5: kp = '4'; break; // 4&nbsp; case&nbsp; 6: kp = '5'; break; // 5&nbsp; case&nbsp; 7: kp = '6'; break; // 6&nbsp; case&nbsp; 9: kp = '7'; break; // 7&nbsp; case 10: kp = '8'; break; // 8&nbsp; case 11: kp = '9'; break; // 9&nbsp; case 13: kp = 42; break; // *&nbsp; case 14: kp = 48; break; // 0&nbsp; case 15: kp = 35; break; // #&nbsp;}code1 = kp;Lcd_Chr(2, i+1, code1);&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; // Print key ASCII value on Lcdi++;}void delay_20ms(){&nbsp;delay_ms(20);}void code_read()&nbsp; //Wead data from EEPROM{&nbsp;delay_20ms();&nbsp;user1[0] = EEPROM_Read(0x00);&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; // Read data from address 0&nbsp;delay_20ms();&nbsp;user1[1] = EEPROM_Read(0x01);&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; // Read data from address 2&nbsp;delay_20ms();&nbsp;user1[2] = EEPROM_Read(0x02);&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; // Read data from address 4&nbsp;delay_20ms();&nbsp;user1[3] = EEPROM_Read(0x03);&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; // Read data from address 8&nbsp;delay_20ms();}void code_write() //Write data from EEPROM{&nbsp;delay_20ms();&nbsp;EEPROM_Write(0x00,code1[0]);&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&nbsp; // Write some data at address 00&nbsp;delay_20ms();&nbsp;EEPROM_Write(0x01,code1[1]);&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&nbsp; // Write some data at address 02&nbsp;delay_20ms();&nbsp;EEPROM_Write(0x02,code1[2]);&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&nbsp; // Write some data at address 04&nbsp;delay_20ms();&nbsp;EEPROM_Write(0x03,code1[3]);&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&nbsp; // Write some data at address 08}void change_code(){&nbsp;Lcd_Cmd(_LCD_CLEAR);&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; // Clear display&nbsp;Lcd_Out(1, 1, &quot;Enter New Code&quot;);&nbsp;i=0;&nbsp;code_enter();&nbsp;code_enter();&nbsp;code_enter();&nbsp;code_enter();&nbsp;code_write();&nbsp;code_read();}void main(){&nbsp;ADCON1 |= 0x07;&nbsp; &nbsp; &nbsp; // Configure AN pins as digital&nbsp;TRISA = 0x00;&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; // set direction to be output&nbsp;PORTA.B0&nbsp; =1;&nbsp;Keypad_Init();&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&nbsp; // Initialize Keypad&nbsp;Lcd_Init();&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; // Initialize Lcd&nbsp;code_read();&nbsp;//If no code is stored then default is 2345&nbsp;if(user1[0] == 0xFF &amp;&amp; user1[1] == 0xFF &amp;&amp; user1[2] == 0xFF &amp;&amp; user1[3] == 0xFF )&nbsp;{&nbsp;EEPROM_Write(0x00,'2');&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&nbsp; // Write some data at address 00&nbsp;delay_20ms();&nbsp;EEPROM_Write(0x01,'3');&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&nbsp; // Write some data at address 02&nbsp;delay_20ms();&nbsp;EEPROM_Write(0x02,'4');&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&nbsp; // Write some data at address 04&nbsp;delay_20ms();&nbsp;EEPROM_Write(0x03,'5');&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&nbsp; // Write some data at address 08&nbsp;}&nbsp;code_read();&nbsp;Lcd_Cmd(_LCD_CLEAR);&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; // Clear display&nbsp;Lcd_Cmd(_LCD_CURSOR_OFF);&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp;&nbsp; // Cursor off&nbsp;Lcd_Out(1, 1,msg1 );&nbsp;delay_ms(500);&nbsp;Lcd_Cmd(_LCD_CLEAR);&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; // Clear display&nbsp;do&nbsp;{&nbsp; i = 0;&nbsp; code_enter();&nbsp; if(code1[0] == 42)&nbsp; {&nbsp;&nbsp; Lcd_Cmd(_LCD_CLEAR);&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; // Clear display&nbsp;&nbsp; Lcd_Out(1, 1,msg2);&nbsp;&nbsp; //delay_ms(500);&nbsp;&nbsp; i = 0;&nbsp;&nbsp; code_enter();&nbsp;&nbsp; code_enter();&nbsp;&nbsp; code_enter();&nbsp;&nbsp; code_enter();&nbsp;&nbsp; code_enter();&nbsp;&nbsp; if(code1[0] == '2' &amp;&amp; code1[1] == '3' &amp;&amp; code1[2] == '4' &amp;&amp; code1[3] == '5' &amp;&amp; code1[4] == '5')&nbsp; //check master code&nbsp;&nbsp; {&nbsp; &nbsp; code_enter();&nbsp; &nbsp; if(code1[5] == 35)&nbsp; &nbsp; {&nbsp; &nbsp;&nbsp; change_code();&nbsp; &nbsp; }&nbsp;&nbsp; }&nbsp;&nbsp; if(code1[0] == user1[0] &amp;&amp; code1[1] == user1[1] &amp;&amp; code1[2] == user1[2] &amp;&amp; code1[3] == user1[3] &amp;&amp; code1[4] == 35) //compare code with store one&nbsp;&nbsp; {&nbsp; &nbsp; Lcd_Cmd(_LCD_CLEAR);&nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; &nbsp; // Clear display&nbsp; &nbsp; Lcd_Out(1, 1, msg3);&nbsp; &nbsp; PORTA.B0&nbsp; =0;&nbsp; &nbsp; delay_ms(2000);&nbsp; &nbsp; PORTA.B0&nbsp; =1;&nbsp; &nbsp; &nbsp;&nbsp; }&nbsp;&nbsp; else&nbsp;&nbsp; {&nbsp; &nbsp; Lcd_Cmd(_LCD_CLEAR);&nbsp; &nbsp; Lcd_Out(1, 1,msg4 );&nbsp;&nbsp; }&nbsp; }&nbsp;}while(1);}<a href="http://www.electronicworkspace.com/2012/08/digital-door-lock-with-pic18f452.html" target="_blank">Source</a>Default Password:&nbsp; 23455</blockquote>

[QUOTE="Little DJ, post: 13235499, member: 320663"] [b]Digital Door Lock with PIC18F452[/b] [IMG]http://1.bp.blogspot.com/-gLSzWoKjU2Y/UDDUFGvw4VI/AAAAAAAABPQ/XF_5HcZ6BeY/s320/ezon.jpg[/IMG] Now lets look at how to build a simple digital door lock using PIC 18F452. Here its required 16x2 LCD display to view the user instructions and other massages and also a 4x3 keypad to input unlock password. Circuit Diagram [IMG]http://3.bp.blogspot.com/-9caWMpv0A7U/UDDu261SUuI/AAAAAAAABPg/l5J2U5ZQEkA/s400/D+Lock.JPG[/IMG] Here unlock output simulated using a LED MikroC Code: unsigned short kp; char code1[10] ,user1[4]; char msg1[20] = "Initializing......",msg2[12] = "Enter Code"; char msg3[15] = "Access Granted",msg4[15] = "Access Denied"; char msg5[15] = "Enter New Code"; int i=0,j; // 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 void code_enter() { kp = 0; // Reset key code variable // Wait for key to be pressed and released do //kp = Keypad_Key_Press(); // Store key code in kp variable 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 i++; } void delay_20ms() { delay_ms(20); } void code_read() //Wead 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(); } 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 } 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(); } void main() { ADCON1 |= 0x07; // Configure AN pins as digital TRISA = 0x00; // set direction to be output PORTA.B0 =1; Keypad_Init(); // Initialize Keypad Lcd_Init(); // Initialize Lcd code_read(); //If no code is stored then default is 2345 if(user1[0] == 0xFF && user1[1] == 0xFF && user1[2] == 0xFF && user1[3] == 0xFF ) { EEPROM_Write(0x00,'2'); // Write some data at address 00 delay_20ms(); EEPROM_Write(0x01,'3'); // Write some data at address 02 delay_20ms(); EEPROM_Write(0x02,'4'); // Write some data at address 04 delay_20ms(); EEPROM_Write(0x03,'5'); // Write some data at address 08 } code_read(); Lcd_Cmd(_LCD_CLEAR); // Clear display Lcd_Cmd(_LCD_CURSOR_OFF); // Cursor off Lcd_Out(1, 1,msg1 ); delay_ms(500); Lcd_Cmd(_LCD_CLEAR); // Clear display do { i = 0; code_enter(); if(code1[0] == 42) { Lcd_Cmd(_LCD_CLEAR); // Clear display Lcd_Out(1, 1,msg2); //delay_ms(500); i = 0; code_enter(); code_enter(); code_enter(); code_enter(); code_enter(); if(code1[0] == '2' && code1[1] == '3' && code1[2] == '4' && code1[3] == '5' && code1[4] == '5') //check master code { code_enter(); if(code1[5] == 35) { change_code(); } } if(code1[0] == user1[0] && code1[1] == user1[1] && code1[2] == user1[2] && code1[3] == user1[3] && code1[4] == 35) //compare code with store one { Lcd_Cmd(_LCD_CLEAR); // Clear display Lcd_Out(1, 1, msg3); PORTA.B0 =0; delay_ms(2000); PORTA.B0 =1; } else { Lcd_Cmd(_LCD_CLEAR); Lcd_Out(1, 1,msg4 ); } } }while(1); } [SIZE="5"][B][URL="http://www.electronicworkspace.com/2012/08/digital-door-lock-with-pic18f452.html"]Source[/URL][/B][/SIZE] Default Password: 23455[/i][/i] [/QUOTE]

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