Este CCS es un tanto puñetero,pero por fin me ha dejado manusearle el archivito para que podamos enchufar nuestro lcd al puerto que mejor nos venga (A,B,C ó D).Lo he probado en el puerto b que es donde tengo puesto yo el lcd,así que debe funcionar también en los otros.Prueben a ver que tal.Les pasteo el archivo completo:
Codigo:
///////////////////////////////////////////////////////////////////////////
//// LCDD.C ////
//// Driver for common LCD modules ////
//// ////
//// lcd_init() Must be called before any other function. ////
//// ////
//// lcd_putc(c) Will display c on the next position of the LCD. ////
//// The following have special meaning: ////
//// f Clear display ////
////
Go to start of second line ////
//// Move back one position ////
//// ////
//// lcd_gotoxy(x,y) Set write position on LCD (upper left is 1,1) ////
//// ////
//// lcd_getc(x,y) Returns character at position x,y on LCD ////
//// ////
///////////////////////////////////////////////////////////////////////////
//// (C) Copyright 1996,2003 Custom Computer Services ////
//// This source code may only be used by licensed users of the CCS C ////
//// compiler. This source code may only be distributed to other ////
//// licensed users of the CCS C compiler. No other use, reproduction ////
//// or distribution is permitted without written permission. ////
//// Derivative programs created using this software in object code ////
//// form are not restricted in any way. ////
///////////////////////////////////////////////////////////////////////////
// Podemos descomentar cualquiera de las líneas siguientes,dependiendo
// del puerto que vayamos a usar,ó podemos incluir la línea correspondiente
// en el programa antes de la línea << #include "lcd.c" >>
// Si no hacemos ninguna de las dos cosas,se usa por defecto el puerto D
//#define use_porta_lcd TRUE
//#define use_portb_lcd TRUE
//#define use_portc_lcd TRUE
struct lcd_pin_map {
BOOLEAN unused;
BOOLEAN rs;
BOOLEAN rw;
BOOLEAN enable;
int data : 4;
} lcd;
#if defined use_porta_lcd
#if defined(__PCH__)
#byte lcd = 0xF80 // PUERTO A GAMA 18
#else
#byte lcd = 5 // PUERTO A GAMA INFERIOR
#endif
#define set_tris_lcd(x) set_tris_a(x)
#else
#if defined use_portb_lcd
#if defined(__PCH__)
#byte lcd = 0xF81 // PUERTO B GAMA 18
#else
#byte lcd = 6 // PUERTO B GAMA INFERIOR
#endif
#define set_tris_lcd(x) set_tris_b(x)
#else
#if defined use_portc_lcd
#if defined(__PCH__)
#byte lcd = 0xF82 // PUERTO C GAMA 18
#else
#byte lcd = 7 // PUERTO C GAMA INFERIOR
#endif
#define set_tris_lcd(x) set_tris_c(x)
#else
#if defined(__PCH__)
#byte lcd = 0xF83 // PUERTO D GAMA 18
#else
#byte lcd = 8 // PUERTO D GAMA INFERIOR
#endif
#define set_tris_lcd(x) set_tris_d(x)
#endif
#endif
#endif
#define lcd_type 2 // 0=5x7, 1=5x10, 2=2 lines
#define lcd_line_two 0x40 // LCD RAM address for the second line
BYTE const LCD_INIT_STRING[4] = {0x20 | (lcd_type << 2), 0xc, 1, 6};
// These bytes need to be sent to the LCD
// to start it up.
// The following are used for setting
// the I/O port direction register.
struct lcd_pin_map const LCD_WRITE = {0,0,0,0,0}; // For write mode all pins are out
struct lcd_pin_map const LCD_READ = {0,0,0,0,15}; // For read mode data pins are in
BYTE lcd_read_byte() {
BYTE low,high;
set_tris_lcd(LCD_READ);
lcd.rw = 1;
delay_cycles(1);
lcd.enable = 1;
delay_cycles(1);
high = lcd.data;
lcd.enable = 0;
delay_cycles(1);
lcd.enable = 1;
delay_us(1);
low = lcd.data;
lcd.enable = 0;
set_tris_lcd(LCD_WRITE);
return( (high<<4) | low);
}
void lcd_send_nibble( BYTE n ) {
lcd.data = n;
delay_cycles(1);
lcd.enable = 1;
delay_us(2);
lcd.enable = 0;
}
void lcd_send_byte( BYTE address, BYTE n ) {
lcd.rs = 0;
while ( bit_test(lcd_read_byte(),7) ) ;
lcd.rs = address;
delay_cycles(1);
lcd.rw = 0;
delay_cycles(1);
lcd.enable = 0;
lcd_send_nibble(n >> 4);
lcd_send_nibble(n & 0xf);
}
void lcd_init() {
BYTE i;
set_tris_lcd(LCD_WRITE);
lcd.rs = 0;
lcd.rw = 0;
lcd.enable = 0;
delay_ms(15);
for(i=1;i<=3;++i) {
lcd_send_nibble(3);
delay_ms(5);
}
lcd_send_nibble(2);
for(i=0;i<=3;++i)
lcd_send_byte(0,LCD_INIT_STRING);
}
void lcd_gotoxy( BYTE x, BYTE y) {
BYTE address;
if(y!=1)
address=lcd_line_two;
else
address=0;
address+=x-1;
lcd_send_byte(0,0x80|address);
}
void lcd_putc( char c) {
switch (c) {
case "f" : lcd_send_byte(0,1);
delay_ms(2);
break;
case "
" : lcd_gotoxy(1,2); break;
case "" : lcd_send_byte(0,0x10); break;
default : lcd_send_byte(1,c); break;
}
}
char lcd_getc( BYTE x, BYTE y) {
char value;
lcd_gotoxy(x,y);
while ( bit_test(lcd_read_byte(),7) ); // wait until busy flag is low
lcd.rs=1;
value = lcd_read_byte();
lcd.rs=0;
return(value);
}
