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- /*
- 1602 LCD Keypad Shield Example Code using the LiquidCrystal Library
- Library originally added 18 Apr 2008 by David A. Mellis
- library modified 5 Jul 2009 by Limor Fried
- example added 9 Jul 2009
- by Tom Igoe
- modified 22 Nov 2010
- by Tom Igoe
- modified Jan 2013 for the 1602 LCD Keypad Shield
- by Bentley Born
- This example code is in the public domain.
- http://arduino.cc/en/Tutorial/LiquidCrystalDisplay
- */
- // include the library code:
- #include <LiquidCrystal.h>
- int x = 0;
- int currx = 1023;
- String btnStr = "None";
- // initialize the library with the numbers of the interface pins
- LiquidCrystal lcd(8, 9, 4, 5, 6, 7);
- void setup() {
- // set up the LCD's number of columns and rows:
- lcd.begin(16, 2);
- // Print a message to the LCD.
- lcd.clear();
- lcd.setCursor(0,0);
- lcd.print("Analog 0: ");
- lcd.print(currx);
- lcd.setCursor(0,1);
- lcd.print(btnStr);
- }
- void loop() {
- x = analogRead(A0); // the buttons are read from the analog0 pin
- // Check if x has changed
- if ((x != 1023) && (x != currx)){
- //update screen and change currx
- lcd.setCursor(10,0);
- lcd.print(" ");
- lcd.setCursor(10,0);
- lcd.print(x);
- currx = x;
- if (currx > 740 && currx < 745){
- btnStr="Select";
- } else if (currx > 500 && currx < 510){
- btnStr="Left";
- } else if (currx < 10){
- btnStr="Right";
- } else if (currx > 140 && currx < 150){
- btnStr="Up";
- } else if (currx > 320 && currx < 365){
- btnStr="Down";
- }
- //update button pressed
- lcd.setCursor(0,1);
- lcd.print(" ");
- lcd.setCursor(0,1);
- lcd.print(btnStr);
- }
- delay(10);
- }
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