Arduino LCD Display(16x4) 3.&4.Zeile Fehler

[pro-bot128]

Hallo,
ich habe mir neulich ein 16x4 LCD Display gekauft. Dies habe ich an Arduino angeschlossen. So habe ich es verbunden:
Display - Arduino
-Pin 1 - +0v
-Pin 2 - +5v
-Pin 3 - Kontrastpoti
-Pin 4 - Pin 12
-Pin 5 - Pin 11
-Pin 6 - Pin 10
-Pin 7&8&9&10 - Nicht verbunden
-Pin 11 - Pin 7
-Pin 12 - Pin 6
-Pin 13 - Pin 5
-Pin 14 - Pin 4
-Pin 15 - +5v
-Pin 16 - +0v

Wenn ich nun meinen Skript auf Arduino lade, steht in der ersten und Zweiten Zeile am Anfang "Hallo Welt!". So habe ich es auch gewollt. In der 3. und 4. Zeile steht es allerdings 4 Charakter weiter als in der 1. und 2. Zeile.
Ist das ein Lieferfehler des Displays? Oder habe ich was falsch programmiert?
Hier mein Skript:


#include <LiquidCrystal.h>

LiquidCrystal lcd(12,11,10,7,6,5,4);

void setup()
{
lcd.begin(16,4);
lcd.setCursor(0,0);
lcd.print("Hallo Welt!"); //Hier
lcd.setCursor(0,1);
lcd.print("Hallo Welt!"); //und hier steht es noch am Anfang
lcd.setCursor(0,2);
lcd.print("Hallo Welt!"); //Hier
lcd.setCursor(0,3);
lcd.print("Hallo Welt!"); //und hier steht es erst ab dem 4. Charakter.
}

void loop()
{
}


Was kann ich da tun?

Danke
pro-bot128

[Hubert.G]

Das ist kein Fehler des Dispplay oder deiner Programmierung, in deiner LiquidCrystal.h werden für dein LCD nicht die richtigen Startadressen der jeweiligen Zeilen eingetragen sein.

[pro-bot128]

was heißt das? meinst du, dass ich es nicht richtig definiert habe? Wie soll ich es in der Library ändern?

[Hubert.G]

In deiner LiquidCrystal.h sind die Startadressen der jeweiligen Zeilen hinterlegt, diese gehört geändert.
Es gab schon öfter Klagen das die Adressen bei diversen Display nicht stimmen, bisher zwar nur in BASCOM, warum soll es beim Arduino nicht auch so sein.

[pro-bot128]

habe die .h Datei jetzt mit notepad++ geöffnet. Wo muss ich jetzt was definieren?

[Hubert.G]

Ich habe die *.h Datei nicht, daher kann ich das nicht sagen.
Was ist das genau für ein Display?

[pro-bot128]

wie ich gesagt habe:16x4. Die LiquidCrystal.h Datei sieht sieht so aus:


#ifndef LiquidCrystal_h
#define LiquidCrystal_h

#include <inttypes.h>
#include "Print.h"

// commands
#define LCD_CLEARDISPLAY 0x01
#define LCD_RETURNHOME 0x02
#define LCD_ENTRYMODESET 0x04
#define LCD_DISPLAYCONTROL 0x08
#define LCD_CURSORSHIFT 0x10
#define LCD_FUNCTIONSET 0x20
#define LCD_SETCGRAMADDR 0x40
#define LCD_SETDDRAMADDR 0x80

// flags for display entry mode
#define LCD_ENTRYRIGHT 0x00
#define LCD_ENTRYLEFT 0x02
#define LCD_ENTRYSHIFTINCREMENT 0x01
#define LCD_ENTRYSHIFTDECREMENT 0x00

// flags for display on/off control
#define LCD_DISPLAYON 0x04
#define LCD_DISPLAYOFF 0x00
#define LCD_CURSORON 0x02
#define LCD_CURSOROFF 0x00
#define LCD_BLINKON 0x01
#define LCD_BLINKOFF 0x00

// flags for display/cursor shift
#define LCD_DISPLAYMOVE 0x08
#define LCD_CURSORMOVE 0x00
#define LCD_MOVERIGHT 0x04
#define LCD_MOVELEFT 0x00

// flags for function set
#define LCD_8BITMODE 0x10
#define LCD_4BITMODE 0x00
#define LCD_2LINE 0x08
#define LCD_1LINE 0x00
#define LCD_5x10DOTS 0x04
#define LCD_5x8DOTS 0x00

class LiquidCrystal : public Print {
public:
LiquidCrystal(uint8_t rs, uint8_t enable,
uint8_t d0, uint8_t d1, uint8_t d2, uint8_t d3,
uint8_t d4, uint8_t d5, uint8_t d6, uint8_t d7);
LiquidCrystal(uint8_t rs, uint8_t rw, uint8_t enable,
uint8_t d0, uint8_t d1, uint8_t d2, uint8_t d3,
uint8_t d4, uint8_t d5, uint8_t d6, uint8_t d7);
LiquidCrystal(uint8_t rs, uint8_t rw, uint8_t enable,
uint8_t d0, uint8_t d1, uint8_t d2, uint8_t d3);
LiquidCrystal(uint8_t rs, uint8_t enable,
uint8_t d0, uint8_t d1, uint8_t d2, uint8_t d3);

void init(uint8_t fourbitmode, uint8_t rs, uint8_t rw, uint8_t enable,
uint8_t d0, uint8_t d1, uint8_t d2, uint8_t d3,
uint8_t d4, uint8_t d5, uint8_t d6, uint8_t d7);

void begin(uint8_t cols, uint8_t rows, uint8_t charsize = LCD_5x8DOTS);

void clear();
void home();

void noDisplay();
void display();
void noBlink();
void blink();
void noCursor();
void cursor();
void scrollDisplayLeft();
void scrollDisplayRight();
void leftToRight();
void rightToLeft();
void autoscroll();
void noAutoscroll();

void createChar(uint8_t, uint8_t[]);
void setCursor(uint8_t, uint8_t);
virtual void write(uint8_t);
void command(uint8_t);
private:
void send(uint8_t, uint8_t);
void write4bits(uint8_t);
void write8bits(uint8_t);
void pulseEnable();

uint8_t _rs_pin; // LOW: command. HIGH: character.
uint8_t _rw_pin; // LOW: write to LCD. HIGH: read from LCD.
uint8_t _enable_pin; // activated by a HIGH pulse.
uint8_t _data_pins[8];

uint8_t _displayfunction;
uint8_t _displaycontrol;
uint8_t _displaymode;

uint8_t _initialized;

uint8_t _numlines,_currline;
};

#endif

[pro-bot128]

Da war auch noch ne .cpp Datei. Die ist so:


#include "LiquidCrystal.h"

#include <stdio.h>
#include <string.h>
#include <inttypes.h>
#include "WProgram.h"

// When the display powers up, it is configured as follows:
//
// 1. Display clear
// 2. Function set:
// DL = 1; 8-bit interface data
// N = 0; 1-line display
// F = 0; 5x8 dot character font
// 3. Display on/off control:
// D = 0; Display off
// C = 0; Cursor off
// B = 0; Blinking off
// 4. Entry mode set:
// I/D = 1; Increment by 1
// S = 0; No shift
//
// Note, however, that resetting the Arduino doesn't reset the LCD, so we
// can't assume that its in that state when a sketch starts (and the
// LiquidCrystal constructor is called).

LiquidCrystal::LiquidCrystal(uint8_t rs, uint8_t rw, uint8_t enable,
uint8_t d0, uint8_t d1, uint8_t d2, uint8_t d3,
uint8_t d4, uint8_t d5, uint8_t d6, uint8_t d7)
{
init(0, rs, rw, enable, d0, d1, d2, d3, d4, d5, d6, d7);
}

LiquidCrystal::LiquidCrystal(uint8_t rs, uint8_t enable,
uint8_t d0, uint8_t d1, uint8_t d2, uint8_t d3,
uint8_t d4, uint8_t d5, uint8_t d6, uint8_t d7)
{
init(0, rs, 255, enable, d0, d1, d2, d3, d4, d5, d6, d7);
}

LiquidCrystal::LiquidCrystal(uint8_t rs, uint8_t rw, uint8_t enable,
uint8_t d0, uint8_t d1, uint8_t d2, uint8_t d3)
{
init(1, rs, rw, enable, d0, d1, d2, d3, 0, 0, 0, 0);
}

LiquidCrystal::LiquidCrystal(uint8_t rs, uint8_t enable,
uint8_t d0, uint8_t d1, uint8_t d2, uint8_t d3)
{
init(1, rs, 255, enable, d0, d1, d2, d3, 0, 0, 0, 0);
}

void LiquidCrystal::init(uint8_t fourbitmode, uint8_t rs, uint8_t rw, uint8_t enable,
uint8_t d0, uint8_t d1, uint8_t d2, uint8_t d3,
uint8_t d4, uint8_t d5, uint8_t d6, uint8_t d7)
{
_rs_pin = rs;
_rw_pin = rw;
_enable_pin = enable;

_data_pins[0] = d0;
_data_pins[1] = d1;
_data_pins[2] = d2;
_data_pins[3] = d3;
_data_pins[4] = d4;
_data_pins[5] = d5;
_data_pins[6] = d6;
_data_pins[7] = d7;

pinMode(_rs_pin, OUTPUT);
// we can save 1 pin by not using RW. Indicate by passing 255 instead of pin#
if (_rw_pin != 255) {
pinMode(_rw_pin, OUTPUT);
}
pinMode(_enable_pin, OUTPUT);

if (fourbitmode)
_displayfunction = LCD_4BITMODE | LCD_1LINE | LCD_5x8DOTS;
else
_displayfunction = LCD_8BITMODE | LCD_1LINE | LCD_5x8DOTS;

begin(16, 1);
}

void LiquidCrystal::begin(uint8_t cols, uint8_t lines, uint8_t dotsize) {
if (lines > 1) {
_displayfunction |= LCD_2LINE;
}
_numlines = lines;
_currline = 0;

// for some 1 line displays you can select a 10 pixel high font
if ((dotsize != 0) && (lines == 1)) {
_displayfunction |= LCD_5x10DOTS;
}

// SEE PAGE 45/46 FOR INITIALIZATION SPECIFICATION!
// according to datasheet, we need at least 40ms after power rises above 2.7V
// before sending commands. Arduino can turn on way befer 4.5V so we'll wait 50
delayMicroseconds(50000);
// Now we pull both RS and R/W low to begin commands
digitalWrite(_rs_pin, LOW);
digitalWrite(_enable_pin, LOW);
if (_rw_pin != 255) {
digitalWrite(_rw_pin, LOW);
}

//put the LCD into 4 bit or 8 bit mode
if (! (_displayfunction & LCD_8BITMODE)) {
// this is according to the hitachi HD44780 datasheet
// figure 24, pg 46

// we start in 8bit mode, try to set 4 bit mode
write4bits(0x03);
delayMicroseconds(4500); // wait min 4.1ms

// second try
write4bits(0x03);
delayMicroseconds(4500); // wait min 4.1ms

// third go!
write4bits(0x03);
delayMicroseconds(150);

// finally, set to 8-bit interface
write4bits(0x02);
} else {
// this is according to the hitachi HD44780 datasheet
// page 45 figure 23

// Send function set command sequence
command(LCD_FUNCTIONSET | _displayfunction);
delayMicroseconds(4500); // wait more than 4.1ms

// second try
command(LCD_FUNCTIONSET | _displayfunction);
delayMicroseconds(150);

// third go
command(LCD_FUNCTIONSET | _displayfunction);
}

// finally, set # lines, font size, etc.
command(LCD_FUNCTIONSET | _displayfunction);

// turn the display on with no cursor or blinking default
_displaycontrol = LCD_DISPLAYON | LCD_CURSOROFF | LCD_BLINKOFF;
display();

// clear it off
clear();

// Initialize to default text direction (for romance languages)
_displaymode = LCD_ENTRYLEFT | LCD_ENTRYSHIFTDECREMENT;
// set the entry mode
command(LCD_ENTRYMODESET | _displaymode);

}

/********** high level commands, for the user! */
void LiquidCrystal::clear()
{
command(LCD_CLEARDISPLAY); // clear display, set cursor position to zero
delayMicroseconds(2000); // this command takes a long time!
}

void LiquidCrystal::home()
{
command(LCD_RETURNHOME); // set cursor position to zero
delayMicroseconds(2000); // this command takes a long time!
}

void LiquidCrystal::setCursor(uint8_t col, uint8_t row)
{
int row_offsets[] = { 0x00, 0x40, 0x14, 0x54 };
if ( row > _numlines ) {
row = _numlines-1; // we count rows starting w/0
}

command(LCD_SETDDRAMADDR | (col + row_offsets[row]));
}

// Turn the display on/off (quickly)
void LiquidCrystal::noDisplay() {
_displaycontrol &= ~LCD_DISPLAYON;
command(LCD_DISPLAYCONTROL | _displaycontrol);
}
void LiquidCrystal::display() {
_displaycontrol |= LCD_DISPLAYON;
command(LCD_DISPLAYCONTROL | _displaycontrol);
}

// Turns the underline cursor on/off
void LiquidCrystal::noCursor() {
_displaycontrol &= ~LCD_CURSORON;
command(LCD_DISPLAYCONTROL | _displaycontrol);
}
void LiquidCrystal::cursor() {
_displaycontrol |= LCD_CURSORON;
command(LCD_DISPLAYCONTROL | _displaycontrol);
}

// Turn on and off the blinking cursor
void LiquidCrystal::noBlink() {
_displaycontrol &= ~LCD_BLINKON;
command(LCD_DISPLAYCONTROL | _displaycontrol);
}
void LiquidCrystal::blink() {
_displaycontrol |= LCD_BLINKON;
command(LCD_DISPLAYCONTROL | _displaycontrol);
}

// These commands scroll the display without changing the RAM
void LiquidCrystal::scrollDisplayLeft(void) {
command(LCD_CURSORSHIFT | LCD_DISPLAYMOVE | LCD_MOVELEFT);
}
void LiquidCrystal::scrollDisplayRight(void) {
command(LCD_CURSORSHIFT | LCD_DISPLAYMOVE | LCD_MOVERIGHT);
}

// This is for text that flows Left to Right
void LiquidCrystal::leftToRight(void) {
_displaymode |= LCD_ENTRYLEFT;
command(LCD_ENTRYMODESET | _displaymode);
}

// This is for text that flows Right to Left
void LiquidCrystal::rightToLeft(void) {
_displaymode &= ~LCD_ENTRYLEFT;
command(LCD_ENTRYMODESET | _displaymode);
}

// This will 'right justify' text from the cursor
void LiquidCrystal::autoscroll(void) {
_displaymode |= LCD_ENTRYSHIFTINCREMENT;
command(LCD_ENTRYMODESET | _displaymode);
}

// This will 'left justify' text from the cursor
void LiquidCrystal::noAutoscroll(void) {
_displaymode &= ~LCD_ENTRYSHIFTINCREMENT;
command(LCD_ENTRYMODESET | _displaymode);
}

// Allows us to fill the first 8 CGRAM locations
// with custom characters
void LiquidCrystal::createChar(uint8_t location, uint8_t charmap[]) {
location &= 0x7; // we only have 8 locations 0-7
command(LCD_SETCGRAMADDR | (location << 3));
for (int i=0; i<8; i++) {
write(charmap[i]);
}
}

/*********** mid level commands, for sending data/cmds */

inline void LiquidCrystal::command(uint8_t value) {
send(value, LOW);
}

inline void LiquidCrystal::write(uint8_t value) {
send(value, HIGH);
}

/************ low level data pushing commands **********/

// write either command or data, with automatic 4/8-bit selection
void LiquidCrystal::send(uint8_t value, uint8_t mode) {
digitalWrite(_rs_pin, mode);

// if there is a RW pin indicated, set it low to Write
if (_rw_pin != 255) {
digitalWrite(_rw_pin, LOW);
}

if (_displayfunction & LCD_8BITMODE) {
write8bits(value);
} else {
write4bits(value>>4);
write4bits(value);
}
}

void LiquidCrystal::pulseEnable(void) {
digitalWrite(_enable_pin, LOW);
delayMicroseconds(1);
digitalWrite(_enable_pin, HIGH);
delayMicroseconds(1); // enable pulse must be >450ns
digitalWrite(_enable_pin, LOW);
delayMicroseconds(100); // commands need > 37us to settle
}

void LiquidCrystal::write4bits(uint8_t value) {
for (int i = 0; i < 4; i++) {
pinMode(_data_pins[i], OUTPUT);
digitalWrite(_data_pins[i], (value >> i) & 0x01);
}

pulseEnable();
}

void LiquidCrystal::write8bits(uint8_t value) {
for (int i = 0; i < 8; i++) {
pinMode(_data_pins[i], OUTPUT);
digitalWrite(_data_pins[i], (value >> i) & 0x01);
}

pulseEnable();
}

[Hubert.G]

Bei dem LCD meinte ich den Typ, Bezeichnung. Im Datenblatt sind meist die Startadressen ersichtlich.
In dieser *.h Datei sehe ich die Startadressen nicht. Es muss da noch andere Dateien für das LCD geben.

[pro-bot128]

Siehe .cpp Datei(Thread #8 )
Ich finde im Datenblatt nix.
Schau selbst:
http://www.produktinfo.conrad.com/datenblaetter/175000-199999/184691-da-01-ml-LCD_Modul_16x4_Zeichen_LED_de_en.pdf

[Hubert.G]

Es müsste die Zeile 175 in der *.cpp sein.
Was dort einzutragen ist müsste im Dateblatt des LCD ersichtlich sein.
Wenn du nichts findest, dann trage dort anstelle von 0x14 und 0x54 die Werte 0x10 und 0x50 ein.

[radbruch]

Im Datenblatt Seite 2 unten:

DISPLAY POSITION
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16
00 01 0F
40 41 4F
10 11 1F
50 51 5F
DISPLAY RAM ADDRESS

Hier 10 und 50 sollte also passen:

void LiquidCrystal::setCursor(uint8_t col, uint8_t row)
{
int row_offsets[] = { 0x00, 0x40, 0x10, 0x50 };
if ( row > _numlines ) {
row = _numlines-1; // we count rows starting w/0
}

[pro-bot128]

danke! ich bin echt froh, das ich diese Community gefunden habe!