Project goal is to read serial input from PC and print it out to a 16x2 LCD. Echoing the data back to the serial monitor
works correctly, but for some reason I cannot get a proper read-out on the LCD. This is my current code, cobbled from
several online sketches:
/*
LiquidCrystal Library - Hello World
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 shows the time.
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://www.arduino.cc/en/Tutorial/LiquidCrystal
*/
// include the library code:
#include <LiquidCrystal.h>
#include <SoftwareSerial.h>
// initialize the library with the numbers of the interface pins
LiquidCrystal lcd(12, 11, 5, 4, 3, 2);
SoftwareSerial mySerial(10, 11); // RX, TX
int incomingByte = 0; // for incoming serial data
const char EOPmarker = '.'; //This is the end of packet marker
char serialbuf[16]; //This gives the incoming serial some room. Change it if you want a longer incoming.
void setup() {
// set up the LCD's number of columns and rows:
lcd.begin(16, 2);
// Print a message to the LCD.
lcd.print("hello, world!");
// Open serial communications and wait for port to open:
Serial.begin(57600);
while (!Serial) {
; // wait for serial port to connect. Needed for Leonardo only
}
Serial.println("Goodnight moon!");
// set the data rate for the SoftwareSerial port
mySerial.begin(57600);
mySerial.println("Hello, world?");
}
void loop() {
if (Serial.available() > 0) { //makes sure something is ready to be read
lcd.clear(); //clears for incoming stuff, won't clear if there isin't data to be read
static int bufpos = 0; //starts the buffer back at the first position in the incoming serial.read
char inchar = Serial.read(); //assigns one byte (as serial.read()'s only input one byte at a time
if (inchar != EOPmarker) { //if the incoming character is not the byte that is the incoming package ender
serialbuf[bufpos] = inchar; //the buffer position in the array get assigned to the current read
bufpos++; //once that has happend the buffer advances, doing this over and over again until the end of package marker is read.
}
else { //once the end of package marker has been read
serialbuf[bufpos] = 0; //restart the buff
bufpos = 0; //restart the position of the buff
Serial.write(serialbuf);
lcd.write(serialbuf);
}
}
}
Any help would be appreciated. Thanks!