LCD Keypad Shield Dan Arduino Uno
Pada kali ini diberikan contoh program untuk membuat aplikasi menggunakan Arduino Uno dan LCD Keypad Shield. Program yang dapat dicoba adalah:
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/************************************************************************************* Mark Bramwell, July 2010 This program will test the LCD panel and the buttons.When you push the button on the shield， the screen will show the corresponding one. Connection: Plug the LCD Keypad to the UNO(or other controllers) **************************************************************************************/ #include <LiquidCrystal.h> LiquidCrystal lcd(8, 9, 4, 5, 6, 7); // select the pins used on the LCD panel // define some values used by the panel and buttons int lcd_key = 0; int adc_key_in = 0; #define btnRIGHT 0 #define btnUP 1 #define btnDOWN 2 #define btnLEFT 3 #define btnSELECT 4 #define btnNONE 5 int read_LCD_buttons(){ // read the buttons adc_key_in = analogRead(0); // read the value from the sensor // my buttons when read are centered at these valies: 0, 144, 329, 504, 741 // we add approx 50 to those values and check to see if we are close // We make this the 1st option for speed reasons since it will be the most likely result if (adc_key_in > 1000) return btnNONE; // For V1.1 us this threshold if (adc_key_in < 50) return btnRIGHT; if (adc_key_in < 250) return btnUP; if (adc_key_in < 450) return btnDOWN; if (adc_key_in < 650) return btnLEFT; if (adc_key_in < 850) return btnSELECT; // For V1.0 comment the other threshold and use the one below: /* if (adc_key_in < 50) return btnRIGHT; if (adc_key_in < 195) return btnUP; if (adc_key_in < 380) return btnDOWN; if (adc_key_in < 555) return btnLEFT; if (adc_key_in < 790) return btnSELECT; */ return btnNONE; // when all others fail, return this. } void setup(){ lcd.begin(16, 2); // start the library lcd.setCursor(0,0); // set the LCD cursor position lcd.print("Push the buttons"); // print a simple message on the LCD } void loop(){ lcd.setCursor(9,1); // move cursor to second line "1" and 9 spaces over lcd.print(millis()/1000); // display seconds elapsed since power-up lcd.setCursor(0,1); // move to the begining of the second line lcd_key = read_LCD_buttons(); // read the buttons switch (lcd_key){ // depending on which button was pushed, we perform an action case btnRIGHT:{ // push button "RIGHT" and show the word on the screen lcd.print("RIGHT "); break; } case btnLEFT:{ lcd.print("LEFT "); // push button "LEFT" and show the word on the screen break; } case btnUP:{ lcd.print("UP "); // push button "UP" and show the word on the screen break; } case btnDOWN:{ lcd.print("DOWN "); // push button "DOWN" and show the word on the screen break; } case btnSELECT:{ lcd.print("SELECT"); // push button "SELECT" and show the word on the screen break; } case btnNONE:{ lcd.print("NONE "); // No action will show "None" on the screen break; } } } |
Library : LCD Shield Referensi: http://dfrobot.com
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