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I have a Problem with PIC 16F877A and LCD 2x16 .. Help Me

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bas_90

bas_90

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i have a PIC 16F877A and LCD 2x16

i tested PIC Only and it's Ok :)

but when test it with LCD , LCD don't show any character !!!

what's the problem and how i can test LCD only to know if it Okay or not ?!

and what's the best Compiler working with Pic 16F877A ?!

thnx :)
 

what is your code to initialize the LCD?

MPLAB is good to start with.
 

thnx , you mean this ?!

Code: 
#include <16F877A>
#include <lcd.c>
#use delay(clock=20000000)

#define en pin_d0;
#define rw pin_d2;
#define rs pin_d1;
#define d4 pin_d4;
#define d5 pin_d5;
#define d6 pin_d6;
#define d7 pin_d7;

void lcd_init()
{
    delay_ms(15);
    cmd(0x38);
    delay_ms(1);
    cmd(0x38);
    delay_us(100);
    cmd(0x38);
    cmd(0x28);             // Function set (4-bit interface, 2 lines, 5*7Pixels)
    cmd(0x28);            // Function set (4-bit interface, 2 lines, 5*7Pixels)
    cmd(0x0c);            // Make cursorinvisible
    clear();              // Clear screen
    cmd(0x6);            // Set entry Mode(auto increment of cursor)
}

void main()
{
           lcd_init();                      // LCD Display initialization
           lcd_cmd(_LCD_CURSOR_OFF);        // LCD Command (Cursor Off)

           for (;;)
           {
           printf(1,1,"Hello World");                        // Define the first message
           Delay_ms(1000);
           
           printf(2,1,"love is love");                        // Define the first message
           Delay_ms(1000);
           }

}
 

Have you also set the PIN that are connected to the LCD? I'm not sure about the coding as I don't have mine right now, but if you are using MPLAB you can use sample codes that are in the software to initialize the LCD.

EDIT : I also find it weird that you have 0x38 3 times.... check the sample code it should give tell you what is missing.
 

Pictou said:
Have you also set the PIN that are connected to the LCD? I'm not sure about the coding as I don't have mine right now, but if you are using MPLAB you can use sample codes that are in the software to initialize the LCD.

EDIT : I also find it weird that you have 0x38 3 times.... check the sample code it should give tell you what is missing.
Click to expand...

Can you write a simple code to Display "Hello World" only ?! thnx alot :)

- - - Updated - - -

jayanth.devarayanadurga said:
You are mixing mikroC and CCS C codes.
Click to expand...

o_O , Any Book to learn Programming PIC by CCS C?!
 

hello , i using MPLAB now and writing the code

show error msg when "Building"

Code: 
HI-TECH C PRO for the PIC10/12/16 MCU family (Lite)  V9.65PL1
Copyright (C) 1984-2009 HI-TECH SOFTWARE
(1273) Omniscient Code Generation not available in Lite mode (warning)
(902) no chip name specified; use "PICC --CHIPINFO" to see available chip names

how can fix it ?!
 

If your code is CCS C code then you have to select CCS C as the toolsuite (compiler) in mplab. You are using Hi Tech C Compiler. Is your code for Hi Tech C Compiler? If yes, post the code so that it can be checked.
 

Ohhh o_O , first i use Hi-Tech but now CCS C Compiler

the first msg error is closed but now new error msg

the dir now for compiler is "C:\Program Files (x86)\Microchip\Third Party\PICC\Ccsc.exe"

and Code
Code: 
#include <16F877A.h>
#fuses HS, NOLVP, NOWDT, NOPROTECT
#use delay(clock=20000000)
#include <lcd.c> 

#define LCD_ENABLE_PIN  PIN_B2                                    ////
#define LCD_RS_PIN      PIN_B0                                    ////
#define LCD_RW_PIN      PIN_B1                                    ////
#define LCD_DATA4       PIN_B3                                    ////
#define LCD_DATA5       PIN_B4                                    ////
#define LCD_DATA6       PIN_B5                                    ////
#define LCD_DATA7       PIN_B6

void manin()
{
char a[10]="Hello";

lcd_init();
while(1)
  {
   lcd_gotoxy(1,1);
   printf(lcd_putc,"%s",a);
   delay_ms(500);           
  } 
}

new error msg is "PCM: the CRG file is missing"
 

You need to have the 4 .crg files. They are the license files of CCS C Compiler. If you have the .crg files put them in CCS C installation folder. Also put lcd.c include after the lcd pin defines otherwise the code will not work.

you have used void manin() change it to void main()
 
Last edited:

new error msg after adding 4 .crg

"PCM: can not find DLL"

- - - Updated - - -

thnx i'm fix it :) , but when executing show this error

Code: 
Error 128 "LCD.C" Line 42(1,6): A #DEVICE required before this line

?! :D
 

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