lights.cpp

/* 
    Functions to manipulate lights on the Arduino. Some sound-related code is also included.
 */

#include "Arduino.h"
#include "lights.h"
#include "SNESpad.h"
#include "MelodyPlayer.h"
#include "pins.h"
#include "gameplay.h"
#include "buttonInput.h"


// Outputs a random integer between 0 and 3 (corresponding to a color)
int randomColor()
{
    return (int)random(0, 4);
}

// Displays a color and plays the corresponding sound
void playColorAndSound(int color, int duration, boolean playAudio)
{
    int toneToPlay;
    // Turn on LED corresponding to the color
    switch (color)
    {
        case 0:
            digitalWrite(RED_LED_PIN, HIGH);
            toneToPlay = redTone;
            break;
        case 1:
            digitalWrite(GREEN_LED_PIN, HIGH);
            toneToPlay = greenTone;
            break;
        case 2:
            digitalWrite(BLUE_LED_PIN, HIGH);
            toneToPlay = blueTone;
            break;
        case 3:
            digitalWrite(YELLOW_LED_PIN, HIGH);
            toneToPlay = yellowTone;
            break;
        default:
            break;
    }

    // Play the corresponding tone for the time in "duration",
    // unless you're not playing audio, in which case just wait
    if (playAudio)
    {
        melodyPlayer.playTone(toneToPlay, duration);
    }
    else
    {
        delay(duration);
    }
}


// Lights the LED of the corresponding color
void lightUpColor(int color)
{
    switch (color)
    {
        case 0:
            digitalWrite(RED_LED_PIN, HIGH);
            break;
        case 1:
            digitalWrite(GREEN_LED_PIN, HIGH);
            break;
        case 2:
            digitalWrite(BLUE_LED_PIN, HIGH);
            break;
        case 3:
            digitalWrite(YELLOW_LED_PIN, HIGH);
            break;
        default:
            return;
    }
}

// Turn off all LEDs
void clearLights()
{
    digitalWrite(RED_LED_PIN, LOW);
    digitalWrite(GREEN_LED_PIN, LOW);
    digitalWrite(BLUE_LED_PIN, LOW);
    digitalWrite(YELLOW_LED_PIN, LOW);
}

// Plays the appropriate sound given a certain color
void playSoundForColor(int color)
{
    // Get frequency in hz
    int frequency;
    switch (color)
    {
        case 0:
            frequency = redTone;
            break;
        case 1:
            frequency = greenTone;
            break;
        case 2:
            frequency = blueTone;
            break;
        case 3:
            frequency = yellowTone;
            break;
        default:
            return;
    }
    // Now, play audio (will be turned off in another function,
    // when the user releases the button)
    tone(SPEAKER_PIN, frequency);
}

// Play the color and sound for a pressed button until the button is released
void playPressedButtonColorAndSound()
{
    // Grab first color pressed by the user
    int pressedColor = getPressedColor();

    // Light corresponding light
    lightUpColor(pressedColor);

    // Loop until the user releases that button
    while (isPressed(pressedColor))
    {
        playSoundForColor(pressedColor);
        updateButtonStates();
    }
    noTone(SPEAKER_PIN);
    clearLights();
}