refactor: put tone generation code into dedicated file

src/audio/tone_generator.cpp

@@ -0,0 +1,54 @@
+#include <Arduino.h>
+
+#ifndef ANALAOG_OUTPUT_PIN
+#define ANALOG_OUTPUT_PIN 3
+#endif
+
+namespace ToneGenerator
+{
+    void handleToneGeneration(void *pvParameters);
+
+    bool tone_on = false;
+    int frequency = 220; // A4
+
+    void init()
+    {
+        pinMode(ANALOG_OUTPUT_PIN, OUTPUT);
+        xTaskCreate(handleToneGeneration, "handleToneGeneration", 2048, NULL, 1, NULL);
+    }
+
+    void handleToneGeneration(void *pvParameters)
+    {
+        int tone_duration = 100;
+        while (true)
+        {
+            if (tone_on)
+            {
+                // tone(ANALOG_OUTPUT_PIN, frequency, tone_duration);
+                delay(tone_duration);
+                tone_on = false;
+            }
+            delay(10);
+        }
+    }
+
+    void setToneOn(bool on)
+    {
+        tone_on = on;
+    }
+
+    bool isToneOn()
+    {
+        return tone_on;
+    }
+
+    void setFrequency(int freq)
+    {
+        frequency = freq;
+    }
+
+    int getFrequency()
+    {
+        return frequency;
+    }
+}

src/audio/tone_generator.hpp

@@ -0,0 +1,13 @@
+#ifndef DRUMZ_AUDIO_TONE_GENERATOR_HPP
+#define DRUMZ_AUDIO_TONE_GENERATOR_HPP
+
+namespace ToneGenerator
+{
+    void init();
+    void setToneOn(bool on);
+    bool isToneOn();
+    void setFrequency(int frequency);
+    int getFrequency();
+}
+
+#endif // DRUMZ_AUDIO_TONE_GENERATOR_HPP

src/main.cpp

@@ -1,8 +1,5 @@
 #include <Arduino.h>
 
-#include <ui/display.hpp>
-#include <input/encoder.hpp>
-
 #define SCREEN_WIDTH 320
 #define SCREEN_HEIGHT 240
 
@@ -10,25 +7,24 @@
 #define ENCODER_A_PIN = 12;
 #define ENCODER_B_PIN = 13;
 
+#define ANALOG_OUTPUT_PIN = 25;
+
+#include <ui/display.hpp>
+#include <input/encoder.hpp>
+#include <audio/tone_generator.hpp>
+
 const int ONBOARD_LED_PIN = 2;
 const int ANALOG_INPUT_PIN = 34;
-const int ANALOG_OUTPUT_PIN = 25;
 
-void handleToneGeneration(void *pvParameters);
 void handle_pad_inputs(void *pvParameters);
 
-bool toneOn = false;
-int frequency = 220; // A4
-
 void setup()
 {
   Serial.begin(115200);
   pinMode(ONBOARD_LED_PIN, OUTPUT);
   pinMode(ANALOG_INPUT_PIN, INPUT);
-  pinMode(ANALOG_OUTPUT_PIN, OUTPUT);
 
 
-  xTaskCreate(handleToneGeneration, "handleToneGeneration", 2048, NULL, 1, NULL);
   xTaskCreate(handle_pad_inputs, "handle_pad_inputs", 2048, NULL, 1, NULL);
 
   Encoder::init();
@@ -52,9 +48,9 @@ void handle_pad_inputs(void *pvParameters)
     for (int i = 0; i < 100; i++)
     {
       int value = analogRead(ANALOG_INPUT_PIN);
-      if (!toneOn && value > 0)
+      if (!ToneGenerator::isToneOn() && value > 0)
       {
-        toneOn = true;
+        ToneGenerator::setToneOn(true);
       }
       if (value > max)
       {
@@ -65,18 +61,3 @@ void handle_pad_inputs(void *pvParameters)
   }
 }
 
-void handleToneGeneration(void *pvParameters)
-{
-  int toneDuration = 100;
-  while (true)
-  {
-    if (toneOn)
-    {
-      // tone(ANALOG_OUTPUT_PIN, frequency, toneDuration);
-      delay(toneDuration);
-      toneOn = false;
-    }
-    delay(10);
-  }
-}
-