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Issue with custom character on LCD

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1Issue with custom character on LCD Empty Issue with custom character on LCD Tue Sep 29, 2020 5:11 pm

agiofelipe



Hello, I'm not able to write custom characters on the LCD (HD44780) with the Arduino, but the program works on another simulator and on the real circuit.
I use version 0.3.12.13 on windows 7.
Thank you for the comments!

2Issue with custom character on LCD Empty Re: Issue with custom character on LCD Wed Sep 30, 2020 12:53 pm

arcachofo

arcachofo

Hi.

Thanks for reporting.
i will have a look.

3Issue with custom character on LCD Empty Re: Issue with custom character on LCD Tue Oct 13, 2020 2:10 pm

arcachofo

arcachofo

I did some testing and it is working for me:

https://youtu.be/zeXl0o2sUQQ

Here is the .ino file:
Code:
/*
  LiquidCrystal Library - Custom Characters

 Demonstrates how to add custom characters on an LCD  display.
 The LiquidCrystal library works with all LCD displays that are
 compatible with the  Hitachi HD44780 driver. There are many of
 them out there, and you can usually tell them by the 16-pin interface.

 This sketch prints "I <heart> Arduino!" and a little dancing man
 to the LCD.

  The circuit:
 * LCD RS pin to digital pin 12
 * LCD Enable pin to digital pin 11
 * LCD D4 pin to digital pin 5
 * LCD D5 pin to digital pin 4
 * LCD D6 pin to digital pin 3
 * LCD D7 pin to digital pin 2
 * LCD R/W pin to ground
 * 10K potentiometer:
 * ends to +5V and ground
 * wiper to LCD VO pin (pin 3)
 * 10K poterntiometer on pin A0

 created 21 Mar 2011
 by Tom Igoe
 modified 11 Nov 2013
 by Scott Fitzgerald

 Based on Adafruit's example at
 https://github.com/adafruit/SPI_VFD/blob/master/examples/createChar/createChar.pde

 This example code is in the public domain.
 http://www.arduino.cc/en/Tutorial/LiquidCrystal

 Also useful:
 http://icontexto.com/charactercreator/

 */

// include the library code:
#include <LiquidCrystal.h>

// initialize the library with the numbers of the interface pins
LiquidCrystal lcd(12, 11, 5, 4, 3, 2);

// make some custom characters:
byte heart[8] = {
  0b00000,
  0b01010,
  0b11111,
  0b11111,
  0b11111,
  0b01110,
  0b00100,
  0b00000
};

byte smiley[8] = {
  0b00000,
  0b00000,
  0b01010,
  0b00000,
  0b00000,
  0b10001,
  0b01110,
  0b00000
};

byte frownie[8] = {
  0b00000,
  0b00000,
  0b01010,
  0b00000,
  0b00000,
  0b00000,
  0b01110,
  0b10001
};

byte armsDown[8] = {
  0b00100,
  0b01010,
  0b00100,
  0b00100,
  0b01110,
  0b10101,
  0b00100,
  0b01010
};

byte armsUp[8] = {
  0b00100,
  0b01010,
  0b00100,
  0b10101,
  0b01110,
  0b00100,
  0b00100,
  0b01010
};

void setup() {
  // initialize LCD and set up the number of columns and rows:
  lcd.begin(16, 2);

  // create a new character
  lcd.createChar(0, heart);
// create a new character
  lcd.createChar(1, smiley);
  // create a new character
  lcd.createChar(2, frownie);
  // create a new character
  lcd.createChar(3, armsDown);
  // create a new character
  lcd.createChar(4, armsUp);

  lcd.setCursor(0, 0);
  // Print a message to the lcd.
  lcd.print("I ");
  lcd.write(byte(0)); // when calling lcd.write() '0' must be cast as a byte
  lcd.print(" Arduino! ");
  lcd.write((byte) 1);

  delay(500);
}

void loop() {
  lcd.setCursor(4, 1);
  // draw the little man, arms down:
  lcd.write(3);
  delay(500);
  lcd.setCursor(4, 1);
  // draw him arms up:
  lcd.write(4);
  delay(500);
}

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