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code.c
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code.c
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/* Main.c file generated by New Project wizard
*
* Created: Wed Jun 29 2022
* Processor: AT89C51
* Compiler: Keil for 8051
*/
#include <reg51.h>
#include <stdio.h>
/* row initialization */
sbit row1 = P1^3;
sbit row2 = P1^4;
sbit row3 = P1^5;
sbit row4 = P1^6;
/* column initialization */
sbit column1 = P1^2;
sbit column2 = P1^1;
sbit column3 = P1^0;
/*motor pin*/
sbit motor1 = P3^0;
sbit motor2 = P3^1;
/*lcd pins*/
sbit rs = P0^0;
sbit rw = P0^1;
sbit en = P0^2;
/*led pins*/
sbit led_r=P0^7;
sbit led_g=P0^6;
void lcddta (unsigned char);/* data command*/
void lcdisplay(unsigned char *k);/* display the messages*/
void lcdcmd(unsigned char);/*lcd command*/
void delay(unsigned int);/* delay command*/
char keypad();/* keypad interfacing*/
void check(unsigned int value1);/*check for the password*/
unsigned char pin[] ={"123456"};/* the assumed password*/
unsigned char Lpin[6];/* the length of the assumed password*/
unsigned char Rpin[]={"**00##"};/*the reset pin*/
void enterPin(unsigned int value);/* the pin entering function*/
void resetPin();/*The reset function*/
void resetNew();/*reset new number function*/
void main(){
led_r=led_g=0;//keep leds off for the process
lcdcmd(0x38);//5 x 7 mstrix selection command
lcdcmd(0x0e);//display on cursor blinking
lcdcmd(0x01);//clear screen
lcdcmd(0x06);//shift to cursor right
enterPin(1);
}//end of main
//EnterPin
void enterPin(unsigned int value){
while(1){
unsigned int p = 0;
lcdcmd(0x80);//1st position for the cursor
lcdisplay("Enter Pin Number");//message to be displayed
delay(1000);
lcdcmd(0xc0);//next line
while(pin[p]!='\0' || Rpin[p]!='\0' || p<6){
Lpin[p]=keypad();//array storing the user's pin
delay(1000);
p++;
};
if (value==1){
check(1);//normal check
}else{
check(2);//reset check
}
}//end of while
}
//delay function
void delay(unsigned int j){
int s, w;
for (s=0;s<j;s++){
for(w=0;w<10;w++){
}
}
}
//lcd commands function
void lcdcmd (unsigned char a){
P2=a;
rs=0;
rw=0;
en=1;
delay(1000);
en=0;
}
//lcd data function
void lcddta(unsigned char i){
P2=i;
rs=1;
rw=0;
en=1;
delay(1000);
en=0;
}
//lcd display function
void lcdisplay(unsigned char *k){
int q;
for(q=0;k[q]!='\0';q++){
lcddta(k[q]);
}
delay(1000);
}
//keypad function
char keypad(){
int x = 0;
while (x==0){
//assign values for first row
row1=0;
row2=1;
row3=1;
row4=1;
if(column1==0){//checking for column key pressed
lcddta('*');//a star for anonymity
delay(1000);
x=1;
return '1';
}
if(column2==0){
lcddta('*');
delay(1000);
x=1;
return '2';
}
if(column3==0){
lcddta('*');
delay(1000);
x=1;
return '3';
}//assign values for second row
row1=1;
row2=0;
row3=1;
row4=1;
if(column1==0){
lcddta('*');
delay(1000);
x=1;
return '4';
}
if(column2==0){
lcddta('*');
delay(1000);
x=1;
return '5';
}
if (column3==0){
lcddta('*');
delay(1000);
x=1;
return '6';
}//assign values for third row
row1=1;
row2=1;
row3=0;
row4=1;
if(column1==0){
lcddta('*');
delay(1000);
x=1;
return '7';
}
if (column2==0){
lcddta('*');
delay(1000);
x=1;
return '8';
}
if (column3==0){
lcddta('*');
delay(1000);
x=1;
return '9';
}//assign values for fourth values
row1=1;
row2=1;
row3=1;
row4=0;
if(column1==0){
lcddta('*');
delay(1000);
x=1;
return '*';
}
if (column2==0){
lcddta('*');
delay(1000);
x=1;
return '0';
}
if(column3==0){
lcddta('*');
delay(1000);
x=1;
return '#';
}
}
}
//check function
void check(unsigned int value1){
if(pin[0]==Lpin[0] && pin[1]==Lpin[1] && pin[2]==Lpin[2 ]&& pin[3]==Lpin[3] && pin[4]==Lpin[4] && pin[5]==Lpin[5] ){
lcdcmd(0x01);//clear screen
lcdcmd(0x80);//first line
lcdisplay("Correct Pin");
if(value1==1){
motor1 =1;//start the motor
motor2 = 0;
delay(1000);
led_g=1;
lcdcmd(0xc0);//next line
lcdisplay("Door Opened");
delay(1000);
led_g=0;
motor1=1;//stop the motor
motor2=1;
lcdcmd(0x01);
}else{//reset pin messages
lcdcmd(0x01);
lcdcmd(0x80);
lcdisplay("Enter New Pin");
lcdcmd(0xc0);
resetNew();
lcdcmd(0x01);
lcdcmd(0x80);
lcdisplay("Done");
lcdcmd(0x01);
enterPin(1);//done resetting
}
}else if(Rpin[0]==Lpin[0]&&Rpin[1]==Lpin[1]&&Rpin[2]==Lpin[2]&&Rpin[3]==Lpin[3]&&Rpin[4]==Lpin[4]&&Rpin[5]==Lpin[5]){
resetPin();//trigger for the reset function
}
else{//wrong password function
lcdcmd(0x01);
lcdcmd(0x80);
led_r=1;
delay(1000);
lcdisplay("Wrong Pin");
delay(1000);
led_r=0;
lcdcmd(0x01);
}
}
//reset function
void resetPin(){
lcdcmd(0x01);
lcdcmd(0x80);
lcdisplay("Reset Mode");
lcdcmd(0x01);
lcdcmd(0x80);
lcdisplay("Enter Current");
lcdcmd(0xc0);
lcdisplay("Pin");
lcdcmd(0x01);
lcdcmd(0x80);
enterPin(2);
}
//new number function
void resetNew(){
unsigned int p;
for (p=0;p<6;p++){
pin[p]=keypad();//making new pin default
delay(1000);
}
}