気まぐれDeveloperブログ: Arduinoと戯れる 9

2015年3月27日金曜日

Arduinoと戯れる 9 - LCD表示 -

以前挑戦して惨敗したLCD表示に挑戦してみる!!

とりあえず今日は半田付け〜動作確認まで。

・LCD

マルツパーツで売られている「MI2CLCD-01」を使用

いざ半田付け開始!!

ほぼ初心者なので手が震えるorz

なんとか完成しました^^;

へ、下手!! orz

とりあえずこれで進めるとして、液晶を取り付けて完成。

とりあえず半田付けがちゃんとできているか確認。

今回は確認なので他力本願、サンプルにある「I2CLiquidCrystal」を使用。

・スケッチ

/*
  LiquidCrystal Library - Cursor

 Demonstrates the use a 16x2 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 "Hello World!" to the LCD and
 uses the cursor()  and noCursor() methods to turn
 on and off the cursor.

 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 resistor:
 * ends to +5V and ground
 * wiper to LCD VO pin (pin 3)

 Library originally added 18 Apr 2008
 by David A. Mellis
 library modified 5 Jul 2009
 by Limor Fried (http://www.ladyada.net)
 example added 9 Jul 2009
 by Tom Igoe 
 modified 22 Nov 2010
 by Tom Igoe

 This example code is in the public domain.

 http://arduino.cc/en/Tutorial/LiquidCrystalCursor

 */

// include the library code:
#include <I2CLiquidCrystal.h>
#include <Wire.h>

// initialize the library
// uncomment next line if you are using a LCD from Straberry Linux
I2CLiquidCrystal lcd(20, false);
                  //  |    +--- set true if the power suply is 5V, false if it is 3.3V
                  //  +-------- contrast (0-63)
// uncomment next line if you are using a LCD from Akizuki denshi
// I2CLiquidCrystal lcd;

void setup() {
  // set up the LCD's number of columns and rows: 
  lcd.begin(A5, A4);
  // Print a message to the LCD.
  lcd.print("hello, world!");
}

void loop() {
  // Turn off the cursor:
  lcd.noCursor();
  delay(500);
  // Turn on the cursor:
  lcd.cursor();
  delay(500);
}