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libraries/hd44780/examples/ioClass/hd44780_NTCUUserial/Serial2LCD/Serial2LCD.ino

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+// vi:ts=4
+// ----------------------------------------------------------------------------
+// Serial2LCD - simple demonstration printing characters from serial port
+// Created by Bill Perry 2020-06-28
+// 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 demonstrates hd44780 how to read a message of characters from 
+// serial port and display it on the LCD.
+// It takes advantage of the hd44780 library automatic line
+// wrapping capability.
+// See the LineWrap sketch for details about line wrapping.
+//
+// Configure LCD_COLS, LCD_ROWS and BAUDRATE if desired/needed
+// Expected behavior of the sketch:
+// - characters received from serial port are displayed on LCD
+// - CR and LF are ignored/dropped
+//
+// 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.
+//
+// Some 16x1 displays are actually a 8x2 display that have both lines on
+// a single line on the display.
+// If you have one of these displays, simply set the geometry to 8x2 instead
+// of 16x1. 
+
+#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;
+
+const int BAUDRATE = 9600;
+
+void setup()
+{
+int status;
+
+	// initalize Serial port
+	Serial.begin(BAUDRATE);
+
+	// 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
+
+		Serial.print("LCD initalization failed: ");
+		Serial.println(status);
+
+		// 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();
+
+	lcd.print("Serial2LCD"); 
+	if(LCD_ROWS > 1)
+	{
+		lcd.setCursor(0,1);
+		lcd.print("Baud:");
+		lcd.print(BAUDRATE);
+	}
+}
+
+void loop()
+{
+
+	// check to see if characters available
+	// indicating a message is coming in
+	if (Serial.available())
+	{
+		// wait some time for rest of message to arrive
+		delay(100);
+
+		// Clear the display before showing the new message
+    	lcd.clear();
+
+		// print the message on the LCD
+		while (Serial.available() > 0)
+		{
+		char c;
+			c = Serial.read();
+			if(c != '\r' && c != '\n') // drop CR and LF characters
+				lcd.write(c);
+		}
+    }
+}