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Hi,
Mini project of “Door security lock password.”
Components required: 2*16 LCD, micro controller AT89S52, 4*4 Keypad, 6vc dc motor and 5v power supply.
Software required: Keil 2v and flash memory programmable.
Write a programming code in Keil 2v software for Door security password lock: see below coding for your mini project.
//Program to make a simple code lock. The default password is 3907.#include<reg51.h>#define port P1#define dataport P2#define key P0#define sec 100sbit rs = port^0;sbit rw = port^1;sbit en = port^2;sbit col1=key^4;sbit col2=key^5;sbit col3=key^6;sbit col4=key^7;sbit row1=key^0;sbit row2=key^1;sbit row3=key^2;sbit row4=key^3;sbit lock_output=P0^7;int check=0;int digit[4]={0,0,0,0};int dig_one=3;int dig_two=9;int dig_three=0;int dig_four=7;int i,count=0;void delay(unsigned int msec) //Time delay function{int i,j ;for(i=0;i<msec;i++)for(j=0;j<1275;j++);}void lcd_cmd(unsigned char item) //Function to send command to LCD{dataport = item;rs= 0;rw=0;en=1;delay(1);en=0;return;}void lcd_data(unsigned char item) // Function to send data to LCD{dataport = item;rs= 1;rw=0;en=1;delay(1);en=0;return;}void lcd_data_string(unsigned char *str) // Function to send string to LCD{int i=0;while(str!=’ ’){lcd_data(str);i++;//delay(10);}return;}void lcd(unsigned char str[10]) // Function to send string to LCD{lcd_cmd(0x38);lcd_cmd(0x0e);lcd_data_string(str);}void ans(){if(check>3){lcd_cmd(0x01);lcd_cmd(0x82);lcd_data_string(” LOCK OPEN”);lock_output=1;delay(500);}else{lcd_cmd(0x01);lcd_cmd(0x82);lcd_data_string(” WRONG PASSWORD”);lock_output=0;count++;delay(500);}}void code_check() // Function to check password{if(i<
){switch((i+1)){case 1: {if(dig_one==digit[0]){check=check+1;}break;}case 2: {if(dig_two==digit[1]){check=check+1;}break;}case 3: {if(dig_three==digit[2]){check=check+1;}break;}case 4: {if(dig_four==digit[3]){check=check+1;}break;}}}if(i=){ans();}}void display(int a) //Display function{switch(a){case 1:{lcd_data(‘1’);delay(30);digit=1;code_check();break;}case 2:{lcd_data(‘2’);delay(30);digit=2;code_check();break;}case 3:{lcd_data(‘3’);delay(30);digit;code_check();break;}case 4:{lcd_data(‘4’);delay(30);digit=4;code_check();break;}case 5:{lcd_data(‘5’);delay(30);digit=5;code_check();break;}case 6:{lcd_data(‘6’);delay(30);digit=6;code_check();break;}case 7:{lcd_data(‘7’);delay(30);digit=7;code_check();break;}case 8:{lcd_data(‘8’);delay(30);digit=8;code_check();break;}case 9:{lcd_data(‘9’);delay(30);digit=9;code_check();break;}case 0:{lcd_data(‘0’);delay(30);digit=0;code_check();break;}}}void check_col1(){row1=row2=row3=row4=1;row1=0;if(col1==0)display(1);row1=1;row2=0;if(col1==0)display(4);row2=1;row3=0;if(col1==0)display(7);row3=1;row4=0;if(col1==0){row4=1;}}void check_col2(){row1=row2=row3=row4=1;row1=0;if(col2==0)display(2);row1=1;row2=0;if(col2==0)display(5);row2=1;row3=0;if(col2==0)display(
;row3=1;row4=0;if(col2==0)display(0);row4=1;}void check_col3(){row1=row2=row3=row4=1;row1=0;if(col3==0)display(3);row1=1;row2=0;if(col3==0)display(6);row2=1;row3=0;if(col3==0)display(9);row3=1;row4=0;if(col3==0){row4=1;}}void main(){col1=col2=col3=1;while(1){lcd_cmd(0x01); //Clear LCD screenlock_output=0;lcd_cmd(0x82); // Set cursor on position first of first linelcd(“ENTER PASSWORD”);check=0;row1=row2=row3=row4=0;while(col1==1 && col2==1 && col3==1);for(i=0;i<4;i++){delay(100);lcd_cmd(0xc4+i);row1=row2=row3=row4=0;while(col1==1 && col2==1 && col3==1);row1=row2=row3=row4=0;if(col1==0)check_col1();elseif(col2==0)check_col2();elseif(col3==0)check_col3();if(count==4){lcd_cmd(0x01);lcd_cmd(0x86);lcd(“SORRY”);lcd_cmd(0xc1);lcd(“NO MORE TRIALS”);while(1);}}}}If require any clarification send me. i will help you………………Thanks.how to display decimal values on lcd display………………………by converting analog value to digital value and to decimal value……….
using piezoelectricsensors as input to adc….and interfacing with microcontroller AT89C51
HELLO SIR, MY PROJECT NAME IS AUTOMATIC COLLEGE RING BELL. SO I WANT PROGRAMMING CODE FOR MICROCONTROLLER AT89CS51
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