Behöver hjälp med att få LCD fungera på PIC18F458
Postat: 21 april 2011, 17:57:14
Kompilatorn MCC18 har ju inbyggda funktioner för LCD displayer. Dessa försöker jag använda men får dom inte att fungera.
Använder en GDM1602K LCD display inköpt på Electrokit som har fungerat med annan 16F PIC tidigare
http://www.electrokit.se/download/GDM1602K.pdf
Programmet nedan verkar köras då det tänder lysdioden. Men den släcks aldrig så det verkar som om programmet fastnar i LCD funktionerna. Listar också min modifierade xlcd.h.
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Använder en GDM1602K LCD display inköpt på Electrokit som har fungerat med annan 16F PIC tidigare
http://www.electrokit.se/download/GDM1602K.pdf
Programmet nedan verkar köras då det tänder lysdioden. Men den släcks aldrig så det verkar som om programmet fastnar i LCD funktionerna. Listar också min modifierade xlcd.h.
Kod: Markera allt
#include <stdio.h>
#include <p18cxxx.h>
#include<delays.h>
#include "xlcd.h"
void Initiering(void);
#pragma config WDT = OFF , WDTPS = 128
#pragma config OSC = HS
#pragma config LVP = OFF
void main(void)
{
Initiering();
do {} while(1);
}
void Initiering(void)
{
TRISA = 0; //LCD använder RA0-RA5
TRISC = 0; //LED på RC3 för teständamål (ser att programmet körs)
TRISE= 0; //LCD R/W till RE0
ADCON1 = 0x07; //Konfigurera alla AD pinnar till digital I/O
PORTC = 0b00001000; //Tänder LED fungerar
while( BusyXLCD() ); //Ingen skillnad med eller utan denna rad
OpenXLCD( FOUR_BIT & LINES_5X7 ); //Setup pins
WriteCmdXLCD( DON ); //Display on
WriteCmdXLCD( CURSOR_ON); //Cursor på
WriteCmdXLCD( BLINK_ON ); //Blinka cursor
WriteDataXLCD('X'); //Skriv ett X
PORTC = 0; //Släcker LED men det händer inte
}
extern void DelayFor18TCY(void)
{
Delay10TCYx( 2 );
}
extern void DelayPORXLCD(void) //Delay 15 mS
{
Delay1KTCYx(75);
}
extern void DelayXLCD(void) //Delay 5 mS
{
Delay1KTCYx(25);
}
[code]
#ifndef __XLCD_H
#define __XLCD_H
#include "p18cxxx.h"
/* PIC18 XLCD peripheral routines.
*
* Notes:
* - These libraries routines are written to support the
* Hitachi HD44780 LCD controller.
* - The user must define the following items:
* - The LCD interface type (4- or 8-bits)
* - If 4-bit mode
* - whether using the upper or lower nibble
* - The data port
* - The tris register for data port
* - The control signal ports and pins
* - The control signal port tris and pins
* - The user must provide three delay routines:
* - DelayFor18TCY() provides a 18 Tcy delay
* - DelayPORXLCD() provides at least 15ms delay
* - DelayXLCD() provides at least 5ms delay
*/
/* Interface type 8-bit or 4-bit
* For 8-bit operation uncomment the #define BIT8
*/
/* #define BIT8 */
/* When in 4-bit interface define if the data is in the upper
* or lower nibble. For lower nibble, comment the #define UPPER
*/
/* #define UPPER */
/* DATA_PORT defines the port to which the LCD data lines are connected */
#define DATA_PORT PORTA
#define TRIS_DATA_PORT TRISA
/* CTRL_PORT defines the port where the control lines are connected.
* These are just samples, change to match your application.
*/
#define RW_PIN LATEbits.LATE0 /* PORT for RW */
#define TRIS_RW TRISEbits.TRISE0 /* TRIS for RW */
#define RS_PIN LATAbits.LATA5 /* PORT for RS */
#define TRIS_RS TRISAbits.TRISA5 /* TRIS for RS */
#define E_PIN LATAbits.LATA4 /* PORT for D */
#define TRIS_E TRISAbits.TRISA4 /* TRIS for E */
/* Display ON/OFF Control defines */
#define DON 0b00001111 /* Display on */
#define DOFF 0b00001011 /* Display off */
#define CURSOR_ON 0b00001111 /* Cursor on */
#define CURSOR_OFF 0b00001101 /* Cursor off */
#define BLINK_ON 0b00001111 /* Cursor Blink */
#define BLINK_OFF 0b00001110 /* Cursor No Blink */
/* Cursor or Display Shift defines */
#define SHIFT_CUR_LEFT 0b00000100 /* Cursor shifts to the left */
#define SHIFT_CUR_RIGHT 0b00000101 /* Cursor shifts to the right */
#define SHIFT_DISP_LEFT 0b00000110 /* Display shifts to the left */
#define SHIFT_DISP_RIGHT 0b00000111 /* Display shifts to the right */
/* Function Set defines */
#define FOUR_BIT 0b00101100 /* 4-bit Interface */
#define EIGHT_BIT 0b00111100 /* 8-bit Interface */
#define LINE_5X7 0b00110000 /* 5x7 characters, single line */
#define LINE_5X10 0b00110100 /* 5x10 characters */
#define LINES_5X7 0b00111000 /* 5x7 characters, multiple line */
#define PARAM_SCLASS auto
#define MEM_MODEL far /* Change this to near for small memory model */
/* OpenXLCD
* Configures I/O pins for external LCD
*/
void OpenXLCD(PARAM_SCLASS unsigned char);
/* SetCGRamAddr
* Sets the character generator address
*/
void SetCGRamAddr(PARAM_SCLASS unsigned char);
/* SetDDRamAddr
* Sets the display data address
*/
void SetDDRamAddr(PARAM_SCLASS unsigned char);
/* BusyXLCD
* Returns the busy status of the LCD
*/
unsigned char BusyXLCD(void);
/* ReadAddrXLCD
* Reads the current address
*/
unsigned char ReadAddrXLCD(void);
/* ReadDataXLCD
* Reads a byte of data
*/
char ReadDataXLCD(void);
/* WriteCmdXLCD
* Writes a command to the LCD
*/
void WriteCmdXLCD(PARAM_SCLASS unsigned char);
/* WriteDataXLCD
* Writes a data byte to the LCD
*/
void WriteDataXLCD(PARAM_SCLASS char);
/* putcXLCD
* A putc is a write
*/
#define putcXLCD WriteDataXLCD
/* putsXLCD
* Writes a string of characters to the LCD
*/
void putsXLCD(PARAM_SCLASS char *);
/* putrsXLCD
* Writes a string of characters in ROM to the LCD
*/
void putrsXLCD(const rom char *);
/* User defines these routines according to the oscillator frequency */
extern void DelayFor18TCY(void);
extern void DelayPORXLCD(void);
extern void DelayXLCD(void);
#endif