LCD display with pic16f877a

[john120]

Hello every body,I am trying otinterface my lcd to pic16f877a but as this is the first time I am not coming to the right solution.
could you please help me to solve the issue.

I am using CCS C COMPILER OR MPLAB with assembly language.

Thanks

 

[kabeer02]

what did you want to display?

 

[john120]

I am using 16*1 Lcd display with pic16f877a ,I want to display "hello" in full screen.
The codes in assembly and ccs c are welcome.

My simulation in Proteus has been added here.

 

[wp100]

I am using 16*1 Lcd display with pic16f877a ,I want to display "hello" in full screen.
The codes in assembly and ccs c are welcome.

My simulation in Proteus has been added here.

Hi,

This should get you going, plenty of tutorials on lcds if you search this forum.

 

[john120]

I want to display " Hello" alone and then display " World"after the first cleared and so on meanwhile displaying a world at a time and in using only one line not 2 lines mode.

Thanks!!

 

[wp100]

I want to display " Hello" alone and then display " World"after the first cleared and so on meanwhile displaying a world at a time and in using only one line not 2 lines mode.

Hi,

The code is a complete simple demo of displaying to the most common 16 x 2 display -sure you can work out how to use it with just one line...

 

[alexservice]

hi if you have not find solution i can help you. tell me!!!

 

[kabeer02]

#include <16f877.h>
#fuses xt, nowdt, noprotect, noput
#use delay (clock = 4000000)
#include "lcd.c“ // include this lcd driver
void main()
{
lcd_init(); // initialize the lcd module
lcd_putc(“HELLO WORLD \n"); // prints HELLO WORLD in 1st line and returns the cursor to 2nd line lcd_putc(“world "); // prints world in 2nd line
}

 

[john120]

Yes,thanks for your reply,how can I display the resukt of an ADC reading after displaying those lines??
for example after displaying "World" use a button then the pic reads the adc and display its result on the screen.

Thanks!!

 

[kabeer02]

you need to use ADC of the pic and you must create a functions to do that....

 

[wp100]

Hi,

The code shows how to convert your adc result using an Ascii converter subroutine.

However the ascii converter I have only converts a 8 bits / one byte value into a 3 ascii digits.

For a full 10bit adc result you will need to search for an ascii converter than will accept 10/16 bits and produce at least 4 digits of ascii output or display the adc result as a series of ten x ones and zeros

 

[ganeshgladish]

hi friend,
how to write adc program with out using library function

 

[john120]

can somebody help me with the codes for getting adc on the lcd using ccs c compiler?

Thanks!!

 

[jayanth.devarayanadurga]

You have to save the adc result in an int variable and then convert the int or float value to string and display it on lcd.

 

[john120]

You have to save the adc result in an int variable and then convert the int or float value to string and display it on lcd.[/QUOTENormally,I know how to do ADC and display for example on seven segment but now I want to display on LCD see the code below for example on seven segment display it on LCD:
#include<16f877a.h>
#device ADC = 10 // Need to tell compiler ADC is configured for 10-bit reading
#fuses HS,NOWDT
#use delay(clock=20000000)
#include<stdio.h>
#include<STDLIB.H>
#use standard_io(A)
#use standard_io(B)
#use standard_io(D)
#define PORTB
#DEFINE PORTC
#define PORTA


byte const digit[]={0xC0,0xF9,0xA4,0xB0,0x99,0x92,0x82,0xF8,0x80,0x90};

char display[2];
int value;
unsigned long volt;
unsigned int value2;

void main(){
set_tris_A(0xFF);
set_tris_B(0X00);
set_tris_D(0x00);
output_b(0);
output_d(0);

setup_comparator(NC_NC_NC_NC);
setup_adc(ADC_CLOCK_INTERNAL);
setup_adc_ports(AN0);
set_adc_channel(0);
setup_vref(FALSE);

while(TRUE){
delay_us(100);
//value=read_adc(); //Not required
read_adc(ADC_START_ONLY);
delay_us(100);
value=read_adc(ADC_READ_ONLY);

volt=(value*500)/1023; //I changed this part of the code
value2=volt;

output_low(PIN_D1);
display[0]=value2/10;
output_high(PIN_D0);

output_B(digit[display[0]]);
delay_ms(10);
output_low(PIN_D0);
display[1]=value2%10;
output_high(PIN_D1);

output_B(digit[display[1]]);
delay_ms(10);

}
}

Thanks

 

[john120]

#include <16f877a.h>
#device ADC=10
#use delay(clock=4000000)
#Fuses HS,NOWDT,NOPROTECT,PUT,NOLVP
#use rs 232(baud=4800,xmit=PIN_C6)
#bit LED=5.5

#include <lcd.c>

void main()
{

float temperature;
float temp;
float value;
float volt;
setup_adc_ports( ALL_ANALOG );
setup_adc(ADC_CLOCK_INTERNAL );
set_adc_channel( 0 );

value = read_adc();
volt = (value / 1023) * 5;
temp = volt * 100;


lcd_init();
set_tris_a(0x1F);
//set_tris_d(0b11110111);
set_tris_b(0xff);
set_tris_c(0xff);
delay_ms(5);
lcd_gotoxy(1,1);
printf(lcd_putc "\fHow");
delay_ms(1500);
printf(lcd_putc "\fis it ");
delay_ms(1500);
printf(lcd_putc "\ffor ");
delay_ms(1500);
printf(lcd_putc "\fyou");
delay_ms(1500);
printf(lcd_putc "\fall?");
delay_ms(5000);
//printf(lcd_putc "temperature:%3.2f\f",temp);

printf(lcd_putc,"Temp is:%f",temp);

}
see the exercice I am doing but the last line is not printing the temperature on the lcd,what is the syntax for that?

Help me plz!!