main.c

This LCD sample application shows how to control HD44780-based character LCD (by Victor Golutvin, corrections by David Hobday).



/**************************************************************
  Description:   HOW TO CONTROL A HD44780-BASED CHARACTER LCD 
  Author(s):     VICTOR GOLUTVIN (UT1WPR)
  History:       FOLLOWED BY MISCELLANIUOIS INTERNET SOURCES
  --------------------------------------------------------- 
  Copyright:     FOR FREE USE
**************************************************************/

#include <system.h>
#include "main.h"

#pragma CLOCK_FREQ 20000000

// Test line for display
const char* Welcome = "Hello World!!!";

// Test variable;
char temp;

//Define device config block
asm
{
list p=PIC16F84
__config H'3FF9'    ;XT,!WDT,!PWRT,!CP
}

// Main program entry

main()
{

    //Init ports
    //A and B port initialization
    trisa = 0;  //All pins configured for output
    trisb = 0;  //All pins configured for output
    porta = 0x00;
    portb = 0x00;
// LCD init procedure call
    init_LCD();
// Send welcome message to LCD
    printf(Welcome);
// Place character "A" at 2-nd column of 2-nd line
    SetPos(1,1);
    LCD_char('A');
// Send space to next place of display
    LCD_char(' ');
// Use variable for character send  
    temp=0x65;
    LCD_char(temp);
    temp=0xA5;
// Output code as DEC (3 chars)
    LCD_char(' ');
    Hex2Dec(temp);
    LCD_char(' ');
// Output code as HEX (2 chars)
    PHex(temp);

//Infinite loop
    while( 1 );

}


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