firmware/Gravity/Gravity.ino

@@ -168,6 +168,21 @@ void HandleExtClockTick() {
 //
 
 void HandlePlayPressed() {
+    // Check if SHIFT is pressed to mute all/current channel.
+    if (gravity.shift_button.On()) {
+        if (app.selected_channel == 0) {
+            // Mute all channels
+            for (int i = 0; i < Gravity::OUTPUT_COUNT; i++) {
+                app.channel[i].toggleMute();
+            }
+        } else {
+            // Mute selected channel
+            auto& ch = GetSelectedChannel();
+            ch.toggleMute();
+        }
+        return;
+    }
+
     gravity.clock.IsPaused()
         ? gravity.clock.Start()
         : gravity.clock.Stop();
@@ -181,8 +196,8 @@ void HandleEncoderPressed() {
         if (app.selected_channel == 0) {  // main page
             // TODO: rewrite as switch
             if (app.selected_param == PARAM_MAIN_ENCODER_DIR) {
-                bool reversed = app.selected_sub_param == 1;
+                app.encoder_reversed = app.selected_sub_param == 1;
-                gravity.encoder.SetReverseDirection(reversed);
+                gravity.encoder.SetReverseDirection(app.encoder_reversed);
             }
             if (app.selected_param == PARAM_MAIN_SAVE_DATA) {
                 if (app.selected_sub_param < MAX_SAVE_SLOTS) {
@@ -203,6 +218,12 @@ void HandleEncoderPressed() {
                     InitGravity(app);
                 }
             }
+            if (app.selected_param == PARAM_MAIN_FACTORY_RESET) {
+                if (app.selected_sub_param == 0) {  // Reset
+                    stateManager.factoryReset();
+                    InitGravity(app);
+                }
+            }
         }
         // Only mark dirty and reset selected_sub_param when leaving editing mode.
         stateManager.markDirty();
@@ -277,6 +298,9 @@ void editMainParameter(int val) {
         case PARAM_MAIN_RESET_STATE:
             updateSelection(app.selected_sub_param, val, 2);
             break;
+        case PARAM_MAIN_FACTORY_RESET:
+            updateSelection(app.selected_sub_param, val, 2);
+            break;
     }
 }
 

firmware/Gravity/app_state.h

@@ -38,28 +38,4 @@ static Channel& GetSelectedChannel() {
     return app.channel[app.selected_channel - 1];
 }
 
-enum ParamsMainPage : uint8_t {
-    PARAM_MAIN_TEMPO,
-    PARAM_MAIN_SOURCE,
-    PARAM_MAIN_PULSE,
-    PARAM_MAIN_ENCODER_DIR,
-    PARAM_MAIN_SAVE_DATA,
-    PARAM_MAIN_LOAD_DATA,
-    PARAM_MAIN_RESET_STATE,
-    PARAM_MAIN_LAST,
-};
-
-enum ParamsChannelPage : uint8_t {
-    PARAM_CH_MOD,
-    PARAM_CH_PROB,
-    PARAM_CH_DUTY,
-    PARAM_CH_OFFSET,
-    PARAM_CH_SWING,
-    PARAM_CH_EUC_STEPS,
-    PARAM_CH_EUC_HITS,
-    PARAM_CH_CV1_DEST,
-    PARAM_CH_CV2_DEST,
-    PARAM_CH_LAST,
-};
-
 #endif  // APP_STATE_H

firmware/Gravity/channel.h

@@ -161,6 +161,8 @@ class Channel {
     byte getSteps(bool withCvMod = false) const { return withCvMod ? pattern.GetSteps() : base_euc_steps; }
     byte getHits(bool withCvMod = false) const { return withCvMod ? pattern.GetHits() : base_euc_hits; }
 
+    void toggleMute() { mute = !mute; }
+
     /**
      * @brief Processes a clock tick and determines if the output should be high or low.
      * Note: this method is called from an ISR and must be kept as simple as possible.
@@ -168,6 +170,12 @@ class Channel {
      * @param output The output object to be modified.
      */
     void processClockTick(uint32_t tick, DigitalOutput& output) {
+        // Mute check
+        if (mute) {
+            output.Low();
+            return;
+        }
+
         const uint16_t mod_pulses = pgm_read_word_near(&CLOCK_MOD_PULSES[cvmod_clock_mod_index]);
 
         // Conditionally apply swing on down beats.
@@ -298,6 +306,9 @@ class Channel {
     // Euclidean pattern
     Pattern pattern;
 
+    // Mute channel flag
+    bool mute;
+
     // Pre-calculated pulse values for ISR performance
     uint16_t _duty_pulses;
     uint16_t _offset_pulses;

firmware/Gravity/display.h

@@ -96,6 +96,33 @@ constexpr uint8_t CHANNEL_BOXES_Y = 50;
 constexpr uint8_t CHANNEL_BOX_WIDTH = 18;
 constexpr uint8_t CHANNEL_BOX_HEIGHT = 14;
 
+// Menu items for editing global parameters.
+enum ParamsMainPage : uint8_t {
+    PARAM_MAIN_TEMPO,
+    PARAM_MAIN_SOURCE,
+    PARAM_MAIN_PULSE,
+    PARAM_MAIN_ENCODER_DIR,
+    PARAM_MAIN_SAVE_DATA,
+    PARAM_MAIN_LOAD_DATA,
+    PARAM_MAIN_RESET_STATE,
+    PARAM_MAIN_FACTORY_RESET,
+    PARAM_MAIN_LAST,
+};
+
+// Menu items for editing channel parameters.
+enum ParamsChannelPage : uint8_t {
+    PARAM_CH_MOD,
+    PARAM_CH_PROB,
+    PARAM_CH_DUTY,
+    PARAM_CH_OFFSET,
+    PARAM_CH_SWING,
+    PARAM_CH_EUC_STEPS,
+    PARAM_CH_EUC_HITS,
+    PARAM_CH_CV1_DEST,
+    PARAM_CH_CV2_DEST,
+    PARAM_CH_LAST,
+};
+
 // Helper function to draw centered text
 void drawCenteredText(const char* text, int y, const uint8_t* font) {
     gravity.display.setFont(font);
@@ -278,13 +305,23 @@ void DisplayMainPage() {
                 mainText = F("x");
                 subText = F("BACK TO MAIN");
             }
+            break;
+        case PARAM_MAIN_FACTORY_RESET:
+            if (app.selected_sub_param == 0) {
+                mainText = F("DEL");
+                subText = F("FACTORY RESET");
+            } else {
+                mainText = F("x");
+                subText = F("BACK TO MAIN");
+            }
+            break;
     }
 
     drawCenteredText(mainText.c_str(), MAIN_TEXT_Y, LARGE_FONT);
     drawCenteredText(subText.c_str(), SUB_TEXT_Y, TEXT_FONT);
 
     // Draw Main Page menu items
-    String menu_items[PARAM_MAIN_LAST] = {F("TEMPO"), F("SOURCE"), F("PULSE OUT"), F("ENCODER DIR"), F("SAVE"), F("LOAD"), F("RESET")};
+    String menu_items[PARAM_MAIN_LAST] = {F("TEMPO"), F("SOURCE"), F("PULSE OUT"), F("ENCODER DIR"), F("SAVE"), F("LOAD"), F("RESET"), F("ERASE")};
     drawMenuItems(menu_items, PARAM_MAIN_LAST);
 }
 

firmware/Gravity/save_state.cpp

@@ -16,6 +16,7 @@
 #include "app_state.h"
 
 // Calculate the starting address for EepromData, leaving space for metadata.
+static const int METADATA_START_ADDR = 0;
 static const int EEPROM_DATA_START_ADDR = sizeof(StateManager::Metadata);
 
 StateManager::StateManager() : _isDirty(false), _lastChangeTime(0) {}
@@ -24,11 +25,14 @@ bool StateManager::initialize(AppState& app) {
     if (_isDataValid()) {
         // Load data from the transient slot.
         return loadData(app, MAX_SAVE_SLOTS);
-    } else {
+    }
     // EEPROM does not contain save data for this firmware & version.
+    else {
+        // Erase EEPROM and initialize state. Save default pattern to all save slots.
+        factoryReset();
         // Initialize eeprom and save default patter to all save slots.
+        _saveMetadata(app);
         reset(app);
-        _saveMetadata();
         // MAX_SAVE_SLOTS slot is reserved for transient state.
         for (int i = 0; i <= MAX_SAVE_SLOTS; i++) {
             app.selected_save_slot = i;
@@ -42,10 +46,12 @@ bool StateManager::loadData(AppState& app, byte slot_index) {
     if (slot_index >= MAX_SAVE_SLOTS) return false;
 
     _loadState(app, slot_index);
+    _loadMetadata(app);
 
     return true;
 }
 
+// Save app state to user specified save slot.
 void StateManager::saveData(const AppState& app) {
     if (app.selected_save_slot >= MAX_SAVE_SLOTS) return;
 
@@ -53,17 +59,18 @@ void StateManager::saveData(const AppState& app) {
     _isDirty = false;
 }
 
+// Save transient state if it has changed and enough time has passed since last save.
 void StateManager::update(const AppState& app) {
     if (_isDirty && (millis() - _lastChangeTime > SAVE_DELAY_MS)) {
         // MAX_SAVE_SLOTS slot is reserved for transient state.
         _saveState(app, MAX_SAVE_SLOTS);
+        _saveMetadata(app);
         _isDirty = false;
     }
 }
 
 void StateManager::reset(AppState& app) {
     app.tempo = Clock::DEFAULT_TEMPO;
-    app.encoder_reversed = false;
     app.selected_param = 0;
     app.selected_channel = 0;
     app.selected_source = Clock::SOURCE_INTERNAL;
@@ -74,6 +81,9 @@ void StateManager::reset(AppState& app) {
         app.channel[i].Init();
     }
 
+    // Load global settings from Metadata
+    _loadMetadata(app);
+
     _isDirty = false;
 }
 
@@ -82,9 +92,18 @@ void StateManager::markDirty() {
     _lastChangeTime = millis();
 }
 
+// Erases all data in the EEPROM by writing 0 to every address.
+void StateManager::factoryReset() {
+    noInterrupts();
+    for (unsigned int i = 0; i < EEPROM.length(); i++) {
+        EEPROM.write(i, 0);
+    }
+    interrupts();
+}
+
 bool StateManager::_isDataValid() {
     Metadata load_meta;
-    EEPROM.get(0, load_meta);
+    EEPROM.get(METADATA_START_ADDR, load_meta);
     bool name_match = (strcmp(load_meta.sketch_name, SKETCH_NAME) == 0);
     bool version_match = (load_meta.version == SKETCH_VERSION);
     return name_match && version_match;
@@ -104,6 +123,10 @@ void StateManager::_saveState(const AppState& app, byte slot_index) {
     save_data.selected_pulse = static_cast<byte>(app.selected_pulse);
     save_data.selected_save_slot = app.selected_save_slot;
 
+    // TODO: break this out into a separate function. Save State should be
+    // broken out into global / per-channel save methods. When saving via
+    // "update" only save state for the current channel since other channels
+    // will not have changed when saving user edits.
     for (int i = 0; i < Gravity::OUTPUT_COUNT; i++) {
         const auto& ch = app.channel[i];
         auto& save_ch = save_data.channel_data[i];
@@ -131,7 +154,6 @@ void StateManager::_loadState(AppState& app, byte slot_index) {
 
     // Restore app state from loaded data.
     app.tempo = load_data.tempo;
-    app.encoder_reversed = load_data.encoder_reversed;
     app.selected_param = load_data.selected_param;
     app.selected_channel = load_data.selected_channel;
     app.selected_source = static_cast<Clock::Source>(load_data.selected_source);
@@ -155,11 +177,23 @@ void StateManager::_loadState(AppState& app, byte slot_index) {
     interrupts();
 }
 
-void StateManager::_saveMetadata() {
+void StateManager::_saveMetadata(const AppState& app) {
     noInterrupts();
     Metadata current_meta;
     strcpy(current_meta.sketch_name, SKETCH_NAME);
     current_meta.version = SKETCH_VERSION;
-    EEPROM.put(0, current_meta);
+
+    // Global user settings
+    current_meta.encoder_reversed = app.encoder_reversed;
+
+    EEPROM.put(METADATA_START_ADDR, current_meta);
+    interrupts();
+}
+
+void StateManager::_loadMetadata(AppState& app) {
+    noInterrupts();
+    Metadata metadata;
+    EEPROM.get(METADATA_START_ADDR, metadata);
+    app.encoder_reversed = metadata.encoder_reversed;
     interrupts();
 }

firmware/Gravity/save_state.h

@@ -19,8 +19,8 @@
 struct AppState;
 
 // Define the constants for the current firmware.
-const char SKETCH_NAME[] = "Gravity";
+const char SKETCH_NAME[] = "AltGravity";
-const byte SKETCH_VERSION = 7;
+const byte SKETCH_VERSION = 1;
 
 // Number of available save slots.
 const byte MAX_SAVE_SLOTS = 10;
@@ -52,11 +52,15 @@ class StateManager {
     void update(const AppState& app);
     // Indicate that state has changed and we should save.
     void markDirty();
+    // Erase all data stored in the EEPROM.
+    void factoryReset();
 
     // This struct holds the data that identifies the firmware version.
     struct Metadata {
         byte version;
         char sketch_name[16];
+        // Additional global/hardware settings
+        bool encoder_reversed;
     };
     struct ChannelState {
         byte base_clock_mod_index;
@@ -83,7 +87,8 @@ class StateManager {
 
    private:
     bool _isDataValid();
-    void _saveMetadata();
+    void _saveMetadata(const AppState& app);
+    void _loadMetadata(AppState& app);
     void _saveState(const AppState& app, byte slot_index);
     void _loadState(AppState& app, byte slot_index);