79 lines
1.9 KiB
C++
79 lines
1.9 KiB
C++
#include <Arduino.h>
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#include <LiquidCrystal.h>
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extern "C" {
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#include "pb_decode.h"
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#include "pb_encode.h"
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#include "lcdkeypad.pb.h"
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}
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// Select the pins used on the LCD panel
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LiquidCrystal lcd(8, 9, 4, 5, 6, 7);
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// Define some values used by the panel and buttons
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int lcd_key = 0;
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int adc_key_in = 0;
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#define btnRIGHT 0
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#define btnUP 1
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#define btnDOWN 2
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#define btnLEFT 3
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#define btnSELECT 4
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#define btnNONE 5
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// Read the buttons
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int read_LCD_buttons() {
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// Read the value from the sensor
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adc_key_in = analogRead(0);
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// Map buttons (v1.0 hardware)
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if (adc_key_in > 1000) return btnNONE;
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if (adc_key_in < 50) return btnRIGHT;
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if (adc_key_in < 195) return btnUP;
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if (adc_key_in < 380) return btnDOWN;
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if (adc_key_in < 555) return btnLEFT;
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if (adc_key_in < 790) return btnSELECT;
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return btnNONE; // when all others fail, return this...
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}
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void setup() {
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lcd.begin(16, 2);
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lcd.setCursor(0, 0);
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lcd.print("Push the buttons");
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}
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void loop() {
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// Move cursor to second line "1" and 9 spaces over
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lcd.setCursor(9, 1);
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// Display seconds elapsed since power-up
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lcd.print(millis()/1000);
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// Move to the start of the second line
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lcd.setCursor(0, 1);
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// Read the buttons
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lcd_key = read_LCD_buttons();
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// Print button status
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switch (lcd_key) {
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case btnRIGHT:
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lcd.print("RIGHT ");
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break;
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case btnLEFT:
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lcd.print("LEFT ");
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break;
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case btnUP:
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lcd.print("UP ");
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break;
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case btnDOWN:
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lcd.print("DOWN ");
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break;
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case btnSELECT:
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lcd.print("SELECT");
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break;
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case btnNONE:
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lcd.print("NONE ");
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break;
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}
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} |