Initialized

src/main.cpp

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+#include <Arduino.h>
+
+int USER_STEPS = 5;
+int STAFF_STEPS = 25;
+
+int maxVolume = 100;
+int userVolume = 100;
+int potPosition = 64;
+int oldUserVolume = userVolume;
+
+void volumeUp();
+void volumeDown();
+
+void setup()
+{
+  pinMode(11, OUTPUT);          // Green
+  pinMode(12, OUTPUT);          // Red LED (D4)
+  pinMode(LED_BUILTIN, OUTPUT); // Green LED
+
+  pinMode(2, INPUT); // SW1
+  pinMode(4, INPUT); // SW2
+
+  // RF Receiver
+  pinMode(A0, INPUT); // Remote Button D
+  pinMode(A1, INPUT); // Remote Button C
+  pinMode(A2, INPUT); // Remote Button B
+  pinMode(A3, INPUT); // Remote Button A
+
+  pinMode(10, OUTPUT); // D10 - CS
+  pinMode(9, OUTPUT);  // D9 - U/D
+  digitalWrite(10, HIGH);
+  digitalWrite(9, LOW);
+
+  for (int i = 0; i < 64; i++)
+  {
+    volumeUp();
+  }
+}
+
+void loop()
+{
+  switch (maxVolume)
+  {
+  case 100:
+    digitalWrite(11, HIGH);
+    digitalWrite(12, LOW);
+    digitalWrite(LED_BUILTIN, LOW);
+    break;
+  case 75:
+    digitalWrite(11, LOW);
+    digitalWrite(12, HIGH);
+    digitalWrite(LED_BUILTIN, LOW);
+    break;
+  case 50:
+    digitalWrite(11, LOW);
+    digitalWrite(12, LOW);
+    digitalWrite(LED_BUILTIN, HIGH);
+    break;
+  case 25:
+    digitalWrite(11, HIGH);
+    digitalWrite(12, HIGH);
+    digitalWrite(LED_BUILTIN, HIGH);
+    break;
+  }
+
+  // SW1 - Staff Volume Up
+  if (!digitalRead(2))
+  {
+    if (maxVolume < 100)
+    {
+      maxVolume += STAFF_STEPS;
+      delay(300);
+    }
+  }
+
+  // SW2 - Staff Volume Down
+  if (!digitalRead(4))
+  {
+    if (maxVolume > 0)
+    {
+      maxVolume -= STAFF_STEPS;
+
+      if (userVolume > maxVolume)
+      {
+        userVolume = maxVolume;
+        oldUserVolume = userVolume;
+      }
+      delay(300);
+    }
+  }
+
+  // Remote D - Mute
+  if (digitalRead(A0))
+  {
+
+    // Check if we are in a muted state
+    if (oldUserVolume > userVolume)
+    {
+      if (oldUserVolume > maxVolume)
+      {
+        userVolume = maxVolume;
+      }
+      else
+      {
+        userVolume = oldUserVolume;
+      }
+    }
+    else
+    {
+      oldUserVolume = userVolume;
+      userVolume = 0;
+    }
+
+    delay(300);
+  }
+
+  // Remote A - Significantly Lower Volume
+  if (digitalRead(A3))
+  {
+    if (oldUserVolume > userVolume)
+    {
+      if (oldUserVolume > maxVolume)
+      {
+        userVolume = maxVolume;
+      }
+      else
+      {
+        userVolume = oldUserVolume;
+      }
+    }
+    else
+    {
+      oldUserVolume = userVolume;
+      userVolume = 15;
+    }
+
+    delay(300);
+  }
+
+  // Remote B - Volume Up
+  if (digitalRead(A2) && !(oldUserVolume > userVolume))
+  {
+    volumeUp();
+
+    if ((userVolume + USER_STEPS) > maxVolume)
+    {
+      userVolume = maxVolume;
+      oldUserVolume = userVolume;
+    }
+    else
+    {
+      userVolume += USER_STEPS;
+      oldUserVolume = userVolume;
+    }
+
+    delay(300);
+  }
+
+  // Remote C - Volume Down
+  if (digitalRead(A1) && !(oldUserVolume > userVolume))
+  {
+    volumeDown();
+
+    if ((userVolume - USER_STEPS) < 0)
+    {
+      userVolume = 0;
+      oldUserVolume = userVolume;
+    }
+    else
+    {
+      userVolume -= USER_STEPS;
+      oldUserVolume = userVolume;
+    }
+
+    delay(300);
+  }
+}
+
+void volumeUp()
+{
+  digitalWrite(9, HIGH);
+  delay(1);
+  digitalWrite(10, LOW);
+  delay(1);
+  digitalWrite(9, LOW);
+  delay(1);
+  digitalWrite(9, HIGH);
+  delay(1);
+  digitalWrite(10, HIGH);
+  delay(1);
+  digitalWrite(9, LOW);
+  digitalWrite(10, HIGH);
+}
+
+void volumeDown()
+{
+  digitalWrite(9, LOW);
+  delay(1);
+  digitalWrite(10, LOW);
+  delay(1);
+  digitalWrite(9, HIGH);
+  delay(1);
+  digitalWrite(9, LOW);
+  delay(1);
+  digitalWrite(10, HIGH);
+}