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Routines for LCD

 
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JEliecer



Joined: 08 Feb 2005
Posts: 17
Location: Bucaramanga - Colombia

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Routines for LCD
PostPosted: Tue Feb 08, 2005 6:05 pm     Reply with quote

Hi,

I need a routine to manage a lcd (2x16) , with a pic 18f448.

I need help, since I am new programming.

Thank you.

Until soon.
dyeatman



Joined: 06 Sep 2003
Posts: 1934
Location: Norman, OK

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PostPosted: Tue Feb 08, 2005 9:12 pm     Reply with quote

There is lots of info on working with an LCD on this forum. Try a little searching on LCD in this forum before you start asking for someone to do the work for you...

You wont find anything for an 18F448 specifically but its basically all the same...
JEliecer



Joined: 08 Feb 2005
Posts: 17
Location: Bucaramanga - Colombia

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I have a routine for lcd with the 18F448
PostPosted: Fri Feb 25, 2005 9:15 am     Reply with quote

//////////////////////////////////////////////////////////////////////////
// LCDPIC18.C //
// DRIVER FOR LCD //
// //
// lcd_init() Debe ser llamada antes que las otras funciones. //
// //
// lcd_putc(c) Visualiza c en la siguiente posición del display. //
// Caracteres especiales de control: //
// \f Borrar display //
// \n Saltar a la segunda linea //
// \b Retroceder una posición. //
// //
// lcd_gotoxy(x,y) Nueva posición de escritura en el display. //
// (la esquina superior izquierda es 1,1) //
// //
// lcd_getc(x,y) Devuelve el caracter de la posición x,y //
// //
// LCD (pin) PIC (pin) //
// 1 GND ----- //
// 2 VCC ----- //
// 3 Contrast ----- //
// 4 RS RA0 //
// 5 RW RA1 //
// 6 ENABLE RA2 //
// 7 D0 RB0 //
// . . . //
// . . . //
// . . . //
// 14 D7 RB7 //
// Si existen: //
// 15 VCC LIGTH //
// 16 GND LIGTH //
// //
//////////////////////////////////////////////////////////////////////////


#bit lcd_enable = 0xF80.2
#bit lcd_rw = 0xF80.1
#bit lcd_rs = 0xF80.0
#byte lcd_a = 0xF80
#byte lcd_b = 0xF81

#define LCD_LINEA2 0x40 // Dirección de memoria para la segunda línea
#define LCD_DATO 1
#define LCD_COMANDO 0

#define LCD_CLEAR 0x01 //Borra el LCD
#define LCD_HOME 0x02 //Envía el cursor a la posición (1,1)

#define LCD_DISPLAY_OFF 0x08 //Apaga el LCD
#define LCD_DISPLAY_ON 0x0C //Enciende el LCD
#define LCD_CURSOR_ON 0x0E //Visualiza el Cursor
#define LCD_CURSOR_BLINK 0x0F //El cursor [spam]íla

#define LCD_CURSOR_SHIFT_RIGHT 0x10 //Para posicionar el cursor
#define LCD_CURSOR_SHIFT_LEFT 0x14 //Para posicionar el cursor
#define LCD_DISPLAY_SHIFT_RIGHT 0x18 //Para posicionar el cursor
#define LCD_DISPLAY_SHIFT_LEFT 0x1C //Para posicionar el cursor

//Rutina para leer los datos del LCD
int lcd_leer()
{
int valor;
set_tris_a(0x18);
set_tris_b(0xFF);
lcd_rw = 1;
delay_cycles(1);
lcd_enable = 1;
delay_cycles(1);
valor = lcd_b;
lcd_enable = 0;
delay_cycles(1);
set_tris_b(0x00);
return valor;
}
//Función para enviar datos al LCD
void lcd_enviar(int dir, int valor)
{
set_tris_a(0x00);
set_tris_b(0x00);
lcd_rs = 0;
while( bit_test(lcd_leer(),7) );
lcd_rs = dir;
delay_cycles(1);
lcd_rw = 0;
delay_cycles(1);
lcd_enable = 0;
lcd_b = valor;
delay_cycles(1);
lcd_enable = 1;
delay_us(2);
lcd_enable = 0;
}
//RUTINA DE INICIO DEL LCD
void lcd_init()
{
int i;
set_tris_a(0x18);
set_tris_b(0x00);
lcd_enable = 0;
lcd_rw = 0;
lcd_rs = 0;
delay_ms(15);
for(i=0; i<3; i++)
{
lcd_enviar(LCD_COMANDO,0x38);
delay_ms(5);
}
lcd_enviar(LCD_COMANDO,LCD_DISPLAY_ON);
lcd_enviar(LCD_COMANDO,0x06);
lcd_enviar(LCD_COMANDO,LCD_CLEAR);
lcd_enviar(LCD_COMANDO,LCD_HOME);
}
//Rutina para enviar datos a una posicion especifica en el LCD
void lcd_gotoxy( byte x, byte y)
{
byte dir;
if(y!=1)
dir=LCD_LINEA2;
else
dir=0;
dir+=x-1;
lcd_enviar(LCD_COMANDO,0x80|dir);
}
//Rutina para enviar caracteres al LCD
void lcd_putc( char c)
{
switch (c)
{
case '\f' : lcd_enviar(LCD_COMANDO,0x01);
delay_ms(2);
break;
case '\n' : lcd_gotoxy(1,2);
break;
case '\b' : lcd_enviar(LCD_COMANDO,0x10);
break;
default : lcd_enviar(LCD_DATO,c);
break;
}
}
char lcd_getc( int x, int y)
{
char valor;
lcd_gotoxy(x,y);
lcd_rs = 1;
valor = lcd_leer();
lcd_rs = 0;
return valor;
}

//////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////////
Este es el programa para sacar datos por el LCD. Esta listo para probar. Solo tienes que armar el Hardware, y ya funciona.

////////////////////////////////////////////////////////////////////////////
//// LCD448.C ////
//// ////
//// Este programa lee y escribe en un LCD ////
//// Utilizando la libreria LCDPIC16.C ////
////////////////////////////////////////////////////////////////////////////
#include <18f448.h>

#use delay(clock=20000000,RESTART_WDT)

#include <lcdpic18.c>

#use fast_io(A)
#use fast_io(B)

//#byte PORTA = 0xf80
//#byte PORTB = 0xf81
//#byte PORTC = 0xf82


void main(void)
{

lcd_init(); // Comandos de inicialización del LCD.

while(1)
{
restart_wdt();
lcd_enviar(LCD_COMANDO, LCD_CLEAR);
delay_ms(2);
lcd_enviar(LCD_COMANDO, LCD_HOME);
delay_ms(2);
lcd_putc(" SoY Un MaLdItO GeNiO\n"); // con \n salta a la segunda línea
lcd_putc("...Si O No InIs JoSE...");
delay_ms(4000);

restart_wdt();
lcd_enviar(LCD_COMANDO, LCD_CLEAR);
delay_ms(2);
lcd_enviar(LCD_COMANDO, LCD_HOME);
delay_ms(2);
lcd_putc(" PoNgAsE A TrAbAjAr\n");
//lcd_gotoxy(5,2); // Otra forma de saltar a la segunda línea
lcd_putc(" PoRqUe AuN No Ha HeChO");
delay_ms(4000);

restart_wdt();
lcd_enviar(LCD_COMANDO, LCD_CLEAR);
delay_ms(2);
lcd_enviar(LCD_COMANDO, LCD_HOME);
delay_ms(2);
lcd_putc(" Ni UnA PuTa MiErDa Y...\n");
lcd_putc("...EsToy QuE Lo MaTo...");
delay_ms(4000);

restart_wdt();
lcd_enviar(LCD_COMANDO, LCD_CLEAR);
delay_ms(2);
lcd_enviar(LCD_COMANDO, LCD_HOME);
delay_ms(2);
lcd_putc(" PaRa QuE ApReNdA a SeR\n");
lcd_putc(" RESPONSABLE");
delay_ms(4000);
}
}

Para preguntas contactame a jeliecer_2001@hotmail.com
Humberto



Joined: 08 Sep 2003
Posts: 1215
Location: Buenos Aires, La Reina del Plata

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PostPosted: Fri Feb 25, 2005 9:44 am     Reply with quote

JEliecer wrote:
Quote:

lcd_putc(" Ni UnA PuTa MiErDa Y...\n");
lcd_putc("...EsToy QuE Lo MaTo...");


With this kind of messages in LCD I can´t imagine what is your project... Confused

Humberto
JEliecer



Joined: 08 Feb 2005
Posts: 17
Location: Bucaramanga - Colombia

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PostPosted: Mon Feb 28, 2005 1:18 pm     Reply with quote

Humberto wrote:
JEliecer wrote:
Quote:

lcd_putc(" Ni UnA PuTa MiErDa Y...\n");
lcd_putc("...EsToy QuE Lo MaTo...");


With this kind of messages in LCD I can´t imagine what is your project... Confused

Humberto


This lines are a JOKE for a friend.
You can replace it for the text that you need.
I hope you don't have but inconveniences.
Until soon.

P.D: Please, write me in Spanish.
Humberto



Joined: 08 Sep 2003
Posts: 1215
Location: Buenos Aires, La Reina del Plata

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PostPosted: Mon Feb 28, 2005 2:32 pm     Reply with quote

Hola JEliecer,

Of course that I don´t have any inconvenience with the text !!!
My comments was just for curiosity. Very Happy

If you want I can write you in Spanish as a private message,
not here in the forum.

Saludos,

Humberto
Mark



Joined: 07 Sep 2003
Posts: 2838
Location: Atlanta, GA

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PostPosted: Mon Feb 28, 2005 9:41 pm     Reply with quote

"SoY Un MaLdItO GeNiO"

You'd think being a Genius he wouldn't be posting Wink Laughing
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