learning to use LCDs, 2x16

[RaulHuertas]

Hello. I want to control an LCD. In the first try I wanted to use the lcd.c library, but the compiler didn't found it. So I said"O right, o right, i'll do it manually".

For this pin configuration:
RD0 -> RS
RD1 -> R/W
RD2 -> EN
RD3 -> BL(connected to the base of an 2222A)
RD4-> D4
RD5-> D5
RD6-> D6
RD7-> D7


this is my initialization routine:

#locate LCD_PORT = 8 //PORTD
#define LCD_EN 2
#define LCD_RW 1
#define LCD_RS 0
#define LCD_BL 3
void LCD_tick(){
bit_set(LCD_PORT, LCD_EN);
bit_clear(LCD_PORT, LCD_EN);
}
void LCD_Activate(){

set_tris_d(0x00);//port d output
delay_ms(50);
output_d( 0x00 );
bit_clear( LCD_PORT , LCD_RS);
bit_clear( LCD_PORT , LCD_RW );
LCD_PORT &= 0b00111111;LCD_tick();/*First Init*/
delay_ms(15);
LCD_PORT &= (0b00111111); LCD_tick();/*Second Init*/
delay_ms(5);
LCD_PORT &= 0b00111111; LCD_tick();/*thirdInit*/
delay_ms(5);


LCD_PORT &= 0b00101111; LCD_tick();/*Modo de 4 bits*/
delay_ms(5);

/*In the next sentences, firts is sended the nmost signifant nibble of an instruction and the the less significative, keeping the othere states of the LCD PORT intacts*/
LCD_PORT &= 0b00001111; LCD_tick();
LCD_PORT &= 0b10001111; LCD_tick();/*Display Off*/

LCD_PORT &= 0b00001111; LCD_tick();
LCD_PORT &= 0b00011111; LCD_tick();/*Clear Screen*/

LCD_PORT &= 0b00001111; LCD_tick();
LCD_PORT &= 0b01101111; LCD_tick();/*Entry Mode: INCREMENT, SHIFT OFF*/

LCD_PORT &= 0b00101111; LCD_tick();
LCD_PORT &= 0b10001111; LCD_tick();/*Function Set: 4 bits, 2 lines*/

LCD_PORT &= 0b00001111; LCD_tick();
LCD_PORT &= 0b11001111; LCD_tick();/*Display On*/

bit_set(LCD_PORT, LCD_RS);//Volver a modo de recibir caracteres

}
void LCD_WriteChar( char c){
LCD_PORT &= ( (c) | 0x0F );
LCD_tick();
LCD_PORT &= ( (c)<<4 | 0x0F );
LCD_tick();
}

/**Escribe una cadena de caracteres terminada en NULL*/
void LCD_WriteString( char* string){
while( *string ){
LCD_WriteChar(*string);
string++;
}

}

/**Enciende la luz de la pantalla LCD*/
void LCD_Iluminate(){
bit_set(LCD_PORT, LCD_BL);
}

/**Apaga la luz de la pantalla LCD*/
void LCD_NoIluminate(){
bit_clear(LCD_PORT, LCD_BL);
}


/******MAIN ROUTINE******/
void main()
{
char* testString = "Hello World!";
setup_adc_ports(NO_ANALOGS);
setup_adc(ADC_OFF);
setup_psp(PSP_DISABLED);
setup_spi(SPI_SS_DISABLED);
setup_timer_0(RTCC_INTERNAL|RTCC_DIV_1);
setup_timer_1(T1_DISABLED);
setup_timer_2(T2_DISABLED,0,1);
setup_comparator(NC_NC_NC_NC);
setup_vref(FALSE);

// TODO: USER CODE!!
set_tris_a(0x00);
output_A(0b11110000);
LCD_Activate();
LCD_Iluminate();

LCD_WriteString(testString);



}




While testing, RW(RD1) stas high :S. I never set it high!. And also the display only activates one line(which means it's just self-initialized).

What is more wear, all port a is in clear state. Is the something wrong about how I handle manually inputs and outputs?
[/code]

[PCM programmer]

Flex LCD driver:
http://www.ccsinfo.com/forum/viewtopic.php?t=24661

[RaulHuertas]

I think I have problems handling Input Output states :S.

#include "D:\Raul\Proyectos\CONEXIONPIC-LCD\UsingFLEXLCD\ProjectFlex-LCD.h"
#include <flex_lcd.c>
#use fast_io (A)
#use fast_io (D)

void main()
{

setup_adc_ports(NO_ANALOGS);
setup_adc(ADC_OFF);
setup_psp(PSP_DISABLED);
setup_spi(SPI_SS_DISABLED);
setup_timer_0(RTCC_INTERNAL|RTCC_DIV_1);
setup_timer_1(T1_DISABLED);
setup_timer_2(T2_DISABLED,0,1);
setup_comparator(NC_NC_NC_NC);
setup_vref(FALSE);

// TODO: USER CODE!!
set_tris_d(0x00);
set_tris_a(0x00);

lcd_init(); // Always call this first.

lcd_putc("\fHello World\n");
lcd_putc("Line Number 2");
output_high(PIN_A0);
output_low(PIN_A1);
output_high(PIN_A2);
output_low(PIN_A3);
output_high(PIN_A4);
output_low(PIN_A5);
while(1);



}


It's even wear the fact that I have no rsponse in A port :S. I'll test another program for check is not my PIc.

By the way, I'm using a PIC16F877A. CCS demo for Windows.

[PCM programmer]