refactor encoder. no need for Dir enum.

encoder.h

@@ -16,28 +16,21 @@
 #include "button.h"
 #include "peripherials.h"
 
-enum Direction {
+class Encoder {
-    DIRECTION_UNCHANGED,
-    DIRECTION_INCREMENT,
-    DIRECTION_DECREMENT,
-};
-
-class EncoderDir {
    protected:
     typedef void (*CallbackFunction)(void);
-    typedef void (*RotateCallbackFunction)(Direction dir, int val);
+    typedef void (*RotateCallbackFunction)(int val);
     CallbackFunction on_press;
     RotateCallbackFunction on_press_rotate;
     RotateCallbackFunction on_rotate;
     int change;
-    Direction dir;
 
    public:
-    EncoderDir() : encoder_(ENCODER_PIN1, ENCODER_PIN2, RotaryEncoder::LatchMode::FOUR3),
+    Encoder() : encoder_(ENCODER_PIN1, ENCODER_PIN2, RotaryEncoder::LatchMode::FOUR3),
                    button_(ENCODER_SW_PIN) {
         _instance = this;
     }
-    ~EncoderDir() {}
+    ~Encoder() {}
 
     // Set to true if the encoder read direction should be reversed.
     void SetReverseDirection(bool reversed) {
@@ -55,12 +48,6 @@ class EncoderDir {
         on_press_rotate = f;
     }
 
-    // Parse EncoderButton increment direction.
-    Direction RotateDirection() {
-        int dir = (int)(encoder_.getDirection());
-        return rotate_(dir, reversed_);
-    }
-
     void Process() {
         // Get encoder position change amount.
         int encoder_rotated = _rotate_change() != 0;
@@ -70,9 +57,9 @@ class EncoderDir {
         // Handle encoder position change and button press.
         if (button_pressed && encoder_rotated) {
             rotated_while_held_ = true;
-            if (on_press_rotate != NULL) on_press_rotate(dir, change);
+            if (on_press_rotate != NULL) on_press_rotate(change);
         } else if (!button_pressed && encoder_rotated) {
-            if (on_rotate != NULL) on_rotate(dir, change);
+            if (on_rotate != NULL) on_rotate(change);
         } else if (button_.Change() == Button::CHANGE_RELEASED && !rotated_while_held_) {
             if (on_press != NULL) on_press();
         }
@@ -91,7 +78,7 @@ class EncoderDir {
     }
 
    private:
-    static EncoderDir* _instance;
+    static Encoder* _instance;
 
     int previous_pos_;
     bool rotated_while_held_;
@@ -112,7 +99,6 @@ class EncoderDir {
         // Update state variables.
         change = position - previous_pos_;
         previous_pos_ = position;
-        dir = RotateDirection();
 
         // Encoder rotate acceleration.
         if (ms < 16) {
@@ -126,17 +112,6 @@ class EncoderDir {
         }
         return change;
     }
-
-    inline Direction rotate_(int dir, bool reversed) {
-        switch (dir) {
-            case 1:
-                return (reversed) ? DIRECTION_DECREMENT : DIRECTION_INCREMENT;
-            case -1:
-                return (reversed) ? DIRECTION_INCREMENT : DIRECTION_DECREMENT;
-            default:
-                return DIRECTION_UNCHANGED;
-        }
-    }
 };
 
 #endif

examples/Gravity/app_state.h

@@ -11,8 +11,8 @@ struct AppState {
     bool encoder_reversed = false;
     bool refresh_screen = true;
     bool editing_param = false;
-    int selected_param = 0;
+    byte selected_param = 0;
-    int selected_sub_param = 0;
+    byte selected_sub_param = 0;
     byte selected_channel = 0;  // 0=tempo, 1-6=output channel
     byte selected_shuffle = 0;
     Clock::Source selected_source = Clock::SOURCE_INTERNAL;

gravity.cpp

@@ -13,7 +13,7 @@
 
 // Initialize the static pointer for the EncoderDir class to null. We want to
 // have a static pointer to decouple the ISR from the global gravity object. 
-EncoderDir* EncoderDir::_instance = nullptr;
+Encoder* Encoder::_instance = nullptr;
 
 void Gravity::Init() {
     initClock();
@@ -74,11 +74,11 @@ void Gravity::Process() {
 
 // Pin Change Interrupt on Port D (D4).
 ISR(PCINT2_vect) {
-    EncoderDir::isr();
+    Encoder::isr();
 };
 // Pin Change Interrupt on Port C (D17/A3).
 ISR(PCINT1_vect) {
-    EncoderDir::isr();
+    Encoder::isr();
 };
 
 // Global instance

gravity.h

@@ -8,7 +8,7 @@
 #include "button.h"
 #include "clock.h"
 #include "digital_output.h"
-#include "encoder_dir.h"
+#include "encoder.h"
 #include "peripherials.h"
 
 // Hardware abstraction wrapper for the Gravity module.
@@ -32,7 +32,7 @@ class Gravity {
     U8G2_SSD1306_128X64_NONAME_1_HW_I2C display;  // OLED display object.
     Clock clock;                                  // Clock source wrapper.
     DigitalOutput outputs[OUTPUT_COUNT];          // An array containing each Output object.
-    EncoderDir encoder;                           // Rotary encoder with button instance
+    Encoder encoder;                           // Rotary encoder with button instance
     Button shift_button;
     Button play_button;
     AnalogInput cv1;