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libraries/hd44780/examples/ioClass/hd44780_NTCUUserial/HelloWorld/HelloWorld.ino

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+// vi:ts=4
+// ----------------------------------------------------------------------------
+// HelloWorld - simple demonstration of lcd
+// Created by Bill Perry 2016-07-02
+// bperrybap@opensource.billsworld.billandterrie.com
+//
+// This example code is unlicensed and is released into the public domain
+// ----------------------------------------------------------------------------
+//
+// This sketch is for the Noritake CU-U series VFDs, in native serial mode
+//
+// Sketch prints "Hello, World!" on the lcd
+//
+// If initialization of the LCD fails and the arduino supports a built in LED,
+// the sketch will simply blink the built in LED.
+//
+// The application note for CU-U series boards is here:
+//     https://www.noritake-elec.com/includes/documents/brochure/CU-U_Application_Note.pdf
+// Datasheets for specific boards, code samples, and more can be found here:
+//     https://www.noritake-elec.com/products/vfd-display-module/character-display/cu-u-series
+//
+//
+// The device uses a kind of 3-wire SPI for communication.
+// Pinout:
+// 1 VCC
+// 2 SI/SO (DATA) MOSI - Digital Pin 11 on Uno & Leonardo
+// 3 GND
+// 4 STB (CS) SS       - Digital Pin 10 on Uno & Leonardo
+// 5 SCK (CLK) SCK     - Digital Pin 13 on Uno & Leonardo
+// 6 NC
+//
+// ----------------------------------------------------------------------------
+// LiquidCrystal compability:
+// Since hd44780 is LiquidCrystal API compatible, most existing LiquidCrystal
+// sketches should work with hd44780 hd44780_NTCUUserial i/o class once the
+// includes are changed to use hd44780 and the lcd object constructor is
+// changed to use the hd44780_NTCUUserial i/o class.
+//
+
+#include <SPI.h>                                // optional, include to use h/w spi
+#include <hd44780.h>                            // main hd44780 header
+#include <hd44780ioClass/hd44780_NTCUUserial.h> // Noritake CU-U serial i/o class header
+
+// constructor parameters:
+// lcd([cs], [clock, data])
+// If no parameters, then library will use SS, SCK, and MOSI pins
+// If cs parameter specified, then use it for chip select then SCK and MOSI
+// If <SPI.h> is included and clock & data pins match h/w SPI pins SCK and MOSI,
+//  h/w spi will be used
+// If h/w spi is not possible, then the code will fall back to bit banging.
+//
+// NOTE:
+//  - Leonardo h/w is "stupid" and does not bring out SS
+//     (it only drives an LED)
+//  - Leonardo does not bring SPI signals to female headers,
+//     they are only on 6 pin ISP header.
+//  - ESP8266 is does not use naked constants for digital pin numbers
+//
+//
+// To work around these pin issues in this sketch,
+// Leonardo will use uno digital pins for SPI h/w which means it will
+// not use h/w spi. All the other boards will use the h/w SPI pins.
+// Consult board pinout diagram to see where SS, SCK, and MOSI are available.
+//
+
+#if defined(ARDUINO_AVR_LEONARDO) || ( (USB_VID == 0x2341) && (USB_PID == 0x8036) )
+const int cs=10, clk=13, data=11; // uno SPI pins (s/w bit banging will be used)
+#else
+const int cs=SS, clk=SCK, data=MOSI; // use h/w SPI pins on all other boards
+#endif
+hd44780_NTCUUserial lcd(cs, clk, data); // declare lcd object
+
+// LCD geometry
+const int LCD_COLS = 16;
+const int LCD_ROWS = 2;
+
+void setup()
+{
+	int status;
+
+	// initialize LCD with number of columns and rows:
+	// hd44780 returns a status from begin() that can be used
+	// to determine if initalization failed.
+	// the actual status codes are defined in <hd44780.h>
+	// See the values RV_XXXX
+	//
+	// looking at the return status from begin() is optional
+	// it is being done here to provide feedback should there be an issue
+	//
+	status = lcd.begin(LCD_COLS, LCD_ROWS);
+	if(status) // non zero status means it was unsuccesful
+	{
+		// begin() failed so blink error code using the onboard LED if possible
+		hd44780::fatalError(status); // does not return
+	}
+
+	// Print a message to the LCD
+	lcd.print("Hello, World!");
+}
+
+void loop() {}