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libraries/hd44780/examples/ioClass/hd44780_NTCU165ECPB/LineWrap/LineWrap.ino

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+// vi:ts=4
+// ----------------------------------------------------------------------------
+// LineWrap - simple demonstration of automatic linewrap functionality
+// Created by Bill Perry 2017-05-10
+// bperrybap@opensource.billsworld.billandterrie.com
+//
+// This example code is unlicensed and is released into the public domain
+// ----------------------------------------------------------------------------
+//
+// This sketch is for the Nortake CU165ECBP-T2J display
+//
+// Sketch demonstrates hd44780 library automatic line wrapping functionality.
+//
+// (Configure LCD_COLS & LCD_ROWS if desired/needed)
+// Expected behavior of the sketch:
+// - display a banner announcing the test.
+// - print the configured LCD geometry 
+// - print a long text string to demostrate automatic line wrapping 
+// - print lots of characters (slowly) to show how the full wrapping works.
+// (loop)
+//
+// If initialization of the LCD fails and the arduino supports a built in LED,
+// the sketch will simply blink the built in LED with the initalization error
+// code.
+//
+// ----------------------------------------------------------------------------
+// Datasheet can be found here:
+//	http://www.blog.zapro.dk/wp-content/CU165.pdf
+// Full datasheet/release notes:
+//	http://www.blog.zapro.dk/wp-content/CU165ECPB_T2J_specification.pdf
+//
+// The device uses SPI for communication.
+// Pinout:
+// 1 Vcc
+// 2 GND
+// 3 /CS  (SS)   - Digital Pin 10 on Uno
+// 4 CLK  (SCK)  - Digital Pin 13 on Uno
+// 5 DATA (MOSI) - Digital Pin 11 on Uno
+//
+//
+// ----------------------------------------------------------------------------
+
+// include the needed headers
+#include <SPI.h> // optional, include to use h/w spi
+#include <hd44780.h>							// main hd44780 header
+#include <hd44780ioClass/hd44780_NTCU165ECPB.h> // include io class header
+
+// declare Arduino pins used for LCD functions
+// and the lcd object
+
+// 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
+// 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_NTCU165ECPB lcd(cs, clk, data); // declare lcd object
+
+// LCD geometry
+const int LCD_COLS = 16;
+const int LCD_ROWS = 1;
+
+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>
+	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
+	}
+
+	// turn on automatic line wrapping
+	// which automatically wraps lines to the next lower line and wraps back
+	// to the top when at the bottom line
+	// NOTE: 
+	// noLineWrap() can be used to disable automatic line wrapping.
+	// _write() can be called instead of write() to send data bytes
+	// to the display bypassing any special character or line wrap processing.
+	lcd.lineWrap();
+}
+
+void loop()
+{
+	lcd.clear();
+	lcd.print("WrapTest"); 
+	delay(2000);
+	lcd.clear();
+
+	//print the configured LCD geometry
+	lcd.print(LCD_COLS);
+	lcd.print("x");
+	lcd.print(LCD_ROWS);
+	delay(3000);
+	lcd.clear();
+
+	// print a long text string
+	// without line wrapping enabled, the text would not wrap properly
+	// to the next line.
+
+	if(LCD_COLS == 8)
+		lcd.print("A long text line");
+	else
+		lcd.print("This is a very long line of text");
+	delay(3000);
+
+	lcd.clear();
+
+	// now print 2 full displays worth of characters to show
+	// the full wrapping.
+
+	lcd.cursor(); // turn on cursor so you can see where it is.
+
+	char c = '0'; // start at the character for the number zero
+	for(int i = 2*LCD_COLS*LCD_ROWS; i; i--)
+	{
+		lcd.print(c++);
+		delay(200); // slow things down to watch the printing & wrapping
+
+		if(c > 0x7e) // wrap back to beginning of printable ASCII chars
+			c = '!'; 
+	}
+	delay(3000);
+	lcd.noCursor(); // turn off cursor
+}