hello guys. Please help me how to display an lcd to our project. Here is the code of our project.
#include<reg51.h>
sbit rs=P1^0; //register select pin
sbit rw=P1^1; //read/write pin
sbit e=P1^2; //enable pin
sbit quat=P3^0; //pin connected to quater level of tank
sbit half=P3^1; //pin connected to half level of tank
sbit quat_3=P3^2; //pin connected to three -fourth level of tank
sbit full=P3^3; //pin connected to full level of tank
sbit spkr_on=P3^4;
sbit spkr_off=P3^5; // pin to off speaker
void delay(int k) //delay function
{
int i,j;
for(i=0;i<k;i++)
for(j=0;j<1275;j++);
}
void write(int j) //write function
{
rs=1; //selecting command register
rw=0; //selecting to write
P2=j; //putting value on the pins
e=1; //strobe the enable pin
delay(1);
e=0;
return;
}
void cmd(int j) //command function
{
P2=j; //put the value on pins
rs=0; //selecting command register
rw=0; //selecting to write
e=1; //strobe enable pin
delay(1);
e=0;
return;
}
void puts(char *a) //puts function to print a string
{
unsigned int p=0;
for(;a[p]!=0;p++)
write(a[p]);
}
void lcd_init(void) // function to initialise the LCD
{
cmd(0x38); //setting 8-bit interface, 2 lines, 5*7 Pixels
delay(1);
cmd(0x0e); //turning on underline visible cursor
delay(1);
cmd(0x01); //clearing screen
cmd(0x80); //moving cursor to the begining of line 1 of LCD
}
void main()
{
quat=half=quat_3=full=spkr_off=1; //configuring as input pins
quat=half=quat_3=full=spkr_off=0; //lowering input pins
spkr_on=1; // making speaker on pin high,as it works on negative logic
while(1)
{
while(quat==0&&half==0&&quat_3==0&&full==0&&spkr_off==0) //condition when tank is empty
{
lcd_init(); // initialising LCD
puts(“VACANT”); //printing VACANT on lcd
}
while(quat==1&&half==0&&quat_3==0&&full==0&&spkr_off==0) //condition when tank is quater
{
lcd_init();
puts(“QUATER”); //printing QUATER on lcd
}
while(quat==1&&half==1&&quat_3==0&&full==0&&spkr_off==0) //condition when tank is half
{
lcd_init();
puts(“HALF”); //printing HALF on lcd
}
while(quat==1&&half==1&&quat_3==1&&full==0&&spkr_off==0) //condition when tank is three-fourth
{
lcd_init();
puts(“3/4 FULL”); //printing 3/4 FULL on lcd
}
while(quat==1&&half==1&&quat_3==1&&full==1&&spkr_off==0) //condition when tank is full
{
lcd_init();
puts(“FULL;CLOSE TAP”); //printing FULL;CLOSE TAP on lcd
spkr_on=0;// Enabling speaker
}
while(quat==1&&half==1&&quat_3==1&&full==1&&spkr_on==0&&spkr_off==1)//enabling high speaker_off pin
{
spkr_on=1;//disabling speaker
}
}
}
I hope you can share your ideas. So, we can pass our project successfully. This is my first time to do the project using the microcontroller. so, please help me. Thank you