/* Author:-
MUFADDAL KAGDA
THOMSON AJ
TERESA ANTONY
MicroController (keil) code 8051
*/
#include <reg51.h>
#include <string.h>
#define dataport P1 //Port for LCD display
#define keyp P3 // Port for keypad
#define port P2 //control signlas for LCD and Buzzer
#define port0 P0
sbit rs = port^1;//register select
sbit rw = port^0;//read/write
sbit en = port^2;//enable
sbit buzzer = port0^0; //buzzer port
sbit red = port0^2; //port for Red LED
sbit green=port0^1; //port for Green LED
unsigned char card[15];
unsigned char c[15];
char READ_SWITCHES(void);
char get_key(void);
sbit mtrop=P0^4; //port for opening gate (moves motor anticlockwise)
sbit mtrcl=P0^3; //port for closing gate(moves motor clockwise)
sbit ir=P0^6; //port connected to IR circuit
sbit RowA = keyp^0; //RowA
sbit RowB = keyp^1; //RowB
sbit RowC = keyp^2; //RowC
sbit RowD = keyp^3; //RowD
sbit C1 = keyp^4; //Column1
sbit C2 = keyp^5; //Column2
sbit C3 = keyp^6; //Column3
sbit C4 = keyp^7; //Column 4
void delay(unsigned int time){
unsigned int i;
for(i=0;i<time;i++);
}
void send(unsigned char d)
{
while(!TI);
TI=0;
SBUF=d;
}
unsigned char read()
{
while(!RI);
RI=0;
return SBUF;
}
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) //Funtion to send data on LCD
{
//send(item);
dataport = item;
rs= 1;
rw=0;
en=1;
delay(1);
en=0;
return;
}
void lcd_data_string(unsigned char *str) // Function to send string on LCD
{
int i=0;
while(str[i]!='\0')
{
lcd_data(str[i]);
i++;
delay(20000);
}
return;
}
void lcd(unsigned char str[15],int r,int p,int c) // Funtion to Initialize,write,clear LCD
{
//row1 0x80
//row2 0xc0
lcd_cmd(0x38);//8bit data bus
lcd_cmd(0x0f);//turn display on,display cursor, blink cursor
//delay(sec);
//---lcd_cmd(0x01);//clear
if(c==1)
lcd_cmd(0x01);
//delay(sec);
if(r==1)
lcd_cmd(0x80+p); //row1 pos
else if(r==2)
lcd_cmd(0xc0+p); //row2 pos
//delay(sec);
lcd_data_string(str);
}
char get_key(void) //get key from user
{
char key = 'n'; //assume no key pressed
while(key=='n') //wait untill a key is pressed
key = READ_SWITCHES(); //scan the keys again and again
/* buzzer=1;
delay(20);
buzzer=0; */
return key; //when key pressed then return its value
}
void serial_init()
{
// P0=0x00; // P0 and P2 as output ports
P2=0x00;
TMOD = 0x20;
SCON = 0x50;
TH1 = 0xFD;
TL1 = 0xFD;
TR1 = 1;
}
char READ_SWITCHES(void)
{
RowA = 0; RowB = 1; RowC = 1; RowD = 1; //Test Row A
if (C1 == 0) { delay(10000); while (C1==0); return '*'; }
if (C2 == 0) { delay(10000); while (C2==0); return '*'; }
if (C3 == 0) { delay(10000); while (C3==0); return '*'; }
if (C4 == 0) { delay(10000); while (C4==0); return '*'; }
RowA = 1; RowB = 0; RowC = 1; RowD = 1; //Test Row B
if (C1 == 0) { delay(10000); while (C1==0); return '*'; }
if (C2 == 0) { delay(10000); while (C2==0); return '*'; }
if (C3 == 0) { delay(10000); while (C3==0); return '*'; }
if (C4 == 0) { delay(10000); while (C4==0); return '*'; }
RowA = 1; RowB = 1; RowC = 0; RowD = 1; //Test Row C
if (C1 == 0) { delay(10000); while (C1==0); return '*'; }
if (C2 == 0) { delay(10000); while (C2==0); return '6'; }
if (C3 == 0) { delay(10000); while (C3==0); return '5'; }
if (C4 == 0) { delay(10000); while (C4==0); return '4'; }
RowA = 1; RowB = 1; RowC = 1; RowD = 0; //Test Row D
if (C1 == 0) { delay(10000); while (C1==0); return '*'; }
if (C2 == 0) { delay(10000); while (C2==0); return '3'; }
if (C3 == 0) { delay(10000); while (C3==0); return '2'; }
if (C4 == 0) { delay(10000); while (C4==0); return '1'; }
return 'n'; // Means no key has been pressed
}
void display(char a,int r,int p) //Display functon for LCD
{
switch(a)
{
case '1':lcd("1",r,p,0);
break;
case '2':lcd("2",r,p,0);
break;
case '3':lcd("3",r,p,0);
break;
case '4':lcd("4",r,p,0);
break;
case '5':lcd("5",r,p,0);
break;
case '6':lcd("6",r,p,0);
break;
case '7':lcd("7",r,p,0);
break;
case '8':lcd("8",r,p,0);
break;
case '9':lcd("9",r,p,0);
break;
case '0':lcd("0",r,p,0);
break;
}
}
main()
{
char key;
unsigned char i;
ir=0; // Initialize IR circuit to 0
serial_init();
TI=1;
RI=1;
while(1)
{
lcd(" Welcome to",1,0,1);
lcd("Ticketing System",2,0,0);
lcd(" Name:",1,0,1);
for(i=0;i<12;i++) //reading name
{
while(RI==0);
card[i]=SBUF;
RI=0;
}
if(card[1]=='#') //if invalid user
{
red=0; //redLED ON
buzzer=0; //Buzzer ON
delay(40000);
red=1; //redLED OFF
buzzer=1; //Buzzer OFF
lcd(" Invalid User",1,0,1);
continue;
}
lcd(card,1,6,0); //if valid user
lcd("Dest:",2,0,0);
key = get_key();
display(key,2,7);
buzzer=0;
delay(2000);
buzzer=1;
send(key);
for(i=0;i<4;i++) //response to enough or low balance
{
while(RI==0);
c[i]=SBUF;
RI=0;
}
if(c[1]=='@') //if low balance
{
red=0; //glow red LED
buzzer=0; //start buzzer
delay(4000);
red=1; //stopGlowing
buzzer=1; //stop buzzer
lcd("Low Balance",2,0,0);
}
else //enough balance then display balance
{
green=0; //GreenLED ON
delay(4000);
delay(4000);
delay(4000);
green=1; //Green LED OFF
mtrop = 0; //open gate by moving motor anticlockwise
delay(4000);
delay(3200);
mtrop = 1; //stop moving
lcd("Bal: ",2,0,0);
lcd(c,2,5,0);
while(ir==0); //Wait till IR Circuit Sends 1
mtrcl=0; //close gate by moving motor clockwise
delay(4000);
mtrcl=1; //stop moving
ir=0; //Initialize IR back to 0
}
}
}
