Randomized melody
This commit is contained in:
Dejvino
parent
4c6a4bfbc1
commit
8759d7f46a
@ -38,7 +38,31 @@ Step sequence[NUM_STEPS];
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Adafruit_SSD1306 display(SCREEN_WIDTH, SCREEN_HEIGHT, &Wire, OLED_RESET);
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Adafruit_NeoPixel pixels(NUM_PIXELS, PIN_NEOPIXEL, NEO_GRB + NEO_KHZ800);
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int currentStep = 0;
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enum UIState {
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UI_TRACKER,
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UI_MENU_MAIN,
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UI_MENU_RANDOMIZE,
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UI_MENU_SETUP,
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UI_SETUP_CHANNEL_EDIT
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};
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UIState currentState = UI_TRACKER;
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const char* mainMenu[] = { "Tracker", "Randomize", "Setup" };
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const int mainMenuCount = sizeof(mainMenu) / sizeof(char*);
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const char* randomizeMenu[] = { "Back", "Gen Scale", "Theme 1", "Theme 2", "Theme 3", "Theme 4", "Theme 5", "Theme 6", "Theme 7" };
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const int randomizeMenuCount = sizeof(randomizeMenu) / sizeof(char*);
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const char* setupMenu[] = { "Back", "Channel" };
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const int setupMenuCount = sizeof(setupMenu) / sizeof(char*);
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int menuSelection = 0;
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int navigationSelection = 1;
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int playbackStep = 0;
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int midiChannel = 1;
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int scaleNotes[12];
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int numScaleNotes = 0;
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int queuedTheme = -1;
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bool isEditing = false;
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int scrollOffset = 0;
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bool isPlaying = false;
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@ -77,8 +101,21 @@ void readEncoder() {
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}
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}
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void sortArray(int arr[], int size) {
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for (int i = 0; i < size - 1; i++) {
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for (int j = 0; j < size - i - 1; j++) {
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if (arr[j] > arr[j + 1]) {
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int temp = arr[j];
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arr[j] = arr[j + 1];
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arr[j + 1] = temp;
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}
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}
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}
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}
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void setup() {
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Serial.begin(115200);
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// Use random ADC noise for seed
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delay(5000);
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Serial.println(F("Starting."));
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@ -119,6 +156,10 @@ void setup() {
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sequence[9].note = 62; // D4
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sequence[12].note = 64; // E4
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// Init randomizer
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randomSeed(micros());
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generateRandomScale();
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display.clearDisplay();
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display.display();
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@ -131,11 +172,39 @@ void setup() {
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}
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void sendMidi(uint8_t status, uint8_t note, uint8_t velocity) {
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Serial1.write(status);
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uint8_t channelStatus = status | (midiChannel - 1);
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Serial1.write(channelStatus);
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Serial1.write(note);
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Serial1.write(velocity);
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}
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void generateRandomScale() {
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numScaleNotes = random(3, 13); // 3 to 12 notes
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for (int i = 0; i < 12; i++) {
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scaleNotes[i] = i; // Fill with all notes
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}
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// Shuffle
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for (int i = 0; i < 12; i++) {
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int j = random(12);
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int temp = scaleNotes[i];
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scaleNotes[i] = scaleNotes[j];
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scaleNotes[j] = temp;
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}
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sortArray(scaleNotes, numScaleNotes);
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}
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void generateTheme(int themeType) {
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sendMidi(0xB0, 123, 0); // Panic / All Notes Off
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randomSeed(themeType * 12345); // Deterministic seed for this theme
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if (numScaleNotes == 0) generateRandomScale();
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for (int i = 0; i < NUM_STEPS; i++) {
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sequence[i].note = (random(100) < 50) ? (12 * 4 + scaleNotes[random(numScaleNotes)]) : -1;
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}
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randomSeed(micros()); // Restore randomness
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isPlaying = true;
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}
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void handleInput() {
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// Handle Encoder Rotation
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int delta = 0;
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@ -145,22 +214,46 @@ void handleInput() {
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interrupts();
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if (delta != 0) {
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if (isEditing) {
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switch(currentState) {
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case UI_TRACKER:
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if (isEditing && navigationSelection > 0) {
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// Change Note
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int newNote = sequence[currentStep].note + delta;
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int stepIndex = navigationSelection - 1;
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int newNote = sequence[stepIndex].note + delta;
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if (newNote < -1) newNote = -1;
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if (newNote > 127) newNote = 127;
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sequence[currentStep].note = newNote;
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Serial.print(F("Note changed: ")); Serial.println(newNote);
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sequence[stepIndex].note = newNote;
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} else {
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// Move Cursor
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currentStep += (delta > 0 ? 1 : -1);
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if (currentStep < 0) currentStep = NUM_STEPS - 1;
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if (currentStep >= NUM_STEPS) currentStep = 0;
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navigationSelection += (delta > 0 ? 1 : -1);
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if (navigationSelection < 0) navigationSelection = NUM_STEPS;
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if (navigationSelection > NUM_STEPS) navigationSelection = 0;
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// Adjust Scroll to keep cursor in view
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if (currentStep < scrollOffset) scrollOffset = currentStep;
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if (currentStep >= scrollOffset + 6) scrollOffset = currentStep - 5;
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if (navigationSelection < scrollOffset) scrollOffset = navigationSelection;
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if (navigationSelection >= scrollOffset + 6) scrollOffset = navigationSelection - 5;
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}
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break;
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case UI_MENU_MAIN:
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menuSelection += (delta > 0 ? 1 : -1);
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if (menuSelection < 0) menuSelection = mainMenuCount - 1;
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if (menuSelection >= mainMenuCount) menuSelection = 0;
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break;
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case UI_MENU_RANDOMIZE:
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menuSelection += (delta > 0 ? 1 : -1);
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if (menuSelection < 0) menuSelection = randomizeMenuCount - 1;
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if (menuSelection >= randomizeMenuCount) menuSelection = 0;
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break;
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case UI_MENU_SETUP:
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menuSelection += (delta > 0 ? 1 : -1);
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if (menuSelection < 0) menuSelection = setupMenuCount - 1;
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if (menuSelection >= setupMenuCount) menuSelection = 0;
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break;
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case UI_SETUP_CHANNEL_EDIT:
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midiChannel += (delta > 0 ? 1 : -1);
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if (midiChannel < 1) midiChannel = 16;
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if (midiChannel > 16) midiChannel = 1;
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break;
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}
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}
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@ -183,21 +276,59 @@ void handleInput() {
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if (reading == HIGH && buttonActive) {
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// Button Released
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buttonActive = false;
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if (!buttonConsumed) {
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if (!buttonConsumed) { // Short press action
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switch(currentState) {
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case UI_TRACKER:
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if (navigationSelection == 0) { // Menu item selected
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currentState = UI_MENU_MAIN;
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menuSelection = 0;
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} else { // A step is selected
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isEditing = !isEditing;
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Serial.print(F("Mode toggled: ")); Serial.println(isEditing ? F("EDIT") : F("NAV"));
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}
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break;
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case UI_MENU_MAIN:
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if (menuSelection == 0) currentState = UI_TRACKER;
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if (menuSelection == 1) { currentState = UI_MENU_RANDOMIZE; menuSelection = 0; }
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if (menuSelection == 2) { currentState = UI_MENU_SETUP; menuSelection = 0; }
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break;
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case UI_MENU_RANDOMIZE:
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if (menuSelection == 0) { currentState = UI_MENU_MAIN; menuSelection = 1; }
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if (menuSelection == 1) generateRandomScale();
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if (menuSelection >= 2) {
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if (isPlaying) {
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queuedTheme = menuSelection - 1;
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} else {
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generateTheme(menuSelection - 1);
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}
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}
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break;
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case UI_MENU_SETUP:
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if (menuSelection == 0) { currentState = UI_MENU_MAIN; menuSelection = 2; }
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if (menuSelection == 1) currentState = UI_SETUP_CHANNEL_EDIT;
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break;
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case UI_SETUP_CHANNEL_EDIT:
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currentState = UI_MENU_SETUP;
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break;
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}
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}
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}
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}
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// Check for Long Press (Start/Stop Playback)
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if (buttonActive && !buttonConsumed && (millis() - buttonPressTime > 600)) {
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// Long press only works from tracker view
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if (currentState == UI_TRACKER) {
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isPlaying = !isPlaying;
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buttonConsumed = true; // Prevent short press action
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Serial.print(F("Playback: ")); Serial.println(isPlaying ? F("ON") : F("OFF"));
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if (!isPlaying) {
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if (isPlaying) {
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playbackStep = navigationSelection > 0 ? navigationSelection - 1 : 0;
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lastStepTime = millis(); // Reset timer to start immediately
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} else {
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// Send All Notes Off on stop (CC 123)
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sendMidi(0xB0, 123, 0);
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queuedTheme = -1;
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}
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}
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}
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@ -211,22 +342,136 @@ void handlePlayback() {
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if (millis() - lastStepTime > interval) {
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lastStepTime = millis();
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// Note Off for current step (before advancing)
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if (sequence[currentStep].note != -1) {
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sendMidi(0x80, sequence[currentStep].note, 0);
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// Note Off for previous step
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if (sequence[playbackStep].note != -1) {
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sendMidi(0x80, sequence[playbackStep].note, 0);
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}
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currentStep++;
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if (currentStep >= NUM_STEPS) currentStep = 0;
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playbackStep++;
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if (playbackStep >= NUM_STEPS) {
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playbackStep = 0;
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if (queuedTheme != -1) {
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generateTheme(queuedTheme);
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queuedTheme = -1;
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}
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}
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// Note On for new step
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if (sequence[currentStep].note != -1) {
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sendMidi(0x90, sequence[currentStep].note, 100);
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if (sequence[playbackStep].note != -1) {
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sendMidi(0x90, sequence[playbackStep].note, 100);
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}
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// Auto-scroll logic is handled in drawUI based on currentStep
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if (currentStep < scrollOffset) scrollOffset = currentStep;
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if (currentStep >= scrollOffset + 6) scrollOffset = currentStep - 5;
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// Auto-scroll navigation cursor if not editing
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if (!isEditing) {
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navigationSelection = playbackStep + 1; // +1 because 0 is menu
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if (navigationSelection < scrollOffset) scrollOffset = navigationSelection;
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if (navigationSelection >= scrollOffset + 6) scrollOffset = navigationSelection - 5;
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}
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}
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}
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void drawMenu(const char* title, const char* items[], int count, int selection) {
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display.println(title);
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display.drawLine(0, 8, 128, 8, SSD1306_WHITE);
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int y = 10;
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for (int i = 0; i < count; i++) {
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if (i == selection) {
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display.fillRect(0, y, 128, 8, SSD1306_WHITE);
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display.setTextColor(SSD1306_BLACK, SSD1306_WHITE);
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} else {
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display.setTextColor(SSD1306_WHITE);
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}
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display.setCursor(2, y);
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display.print(items[i]);
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// Special case for channel display
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if (currentState == UI_MENU_SETUP && i == 1) {
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display.print(F(": "));
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display.print(midiChannel);
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}
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// Special case for queued theme
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if (currentState == UI_MENU_RANDOMIZE && i >= 2 && queuedTheme == (i - 1)) {
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display.print(F(" [NEXT]"));
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}
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y += 9;
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// Special case for scale display
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if (currentState == UI_MENU_RANDOMIZE && i == 1) { // After "Gen Scale"
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display.setTextColor(SSD1306_WHITE); // Ensure it's not highlighted
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display.setCursor(2, y);
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if (numScaleNotes > 0) {
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const char* noteNames[] = {"C", "C#", "D", "D#", "E", "F", "F#", "G", "G#", "A", "A#", "B"};
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for (int j = 0; j < numScaleNotes; j++) {
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display.print(noteNames[scaleNotes[j]]);
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if (j < numScaleNotes - 1) display.print(F(" "));
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}
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} else {
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display.print(F("[No scale generated]"));
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}
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y += 9;
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}
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}
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}
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void drawTracker() {
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display.clearDisplay();
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display.setTextSize(1);
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display.setTextColor(SSD1306_WHITE);
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display.setCursor(0, 0);
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// Header
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display.print(F("SEQ "));
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if (navigationSelection > 0 && isEditing) {
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display.print(F("[EDIT]"));
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} else {
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display.print(F("[NAV] "));
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}
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display.print(F(" CH:"));
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display.print(midiChannel);
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display.println();
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display.drawLine(0, 8, 128, 8, SSD1306_WHITE);
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// Steps
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int y = 10;
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for (int i = 0; i < 6; i++) {
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int itemIndex = i + scrollOffset;
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if (itemIndex > NUM_STEPS) break;
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// Draw Cursor
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if (itemIndex == navigationSelection) {
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display.fillRect(0, y, 128, 8, SSD1306_WHITE);
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display.setTextColor(SSD1306_BLACK, SSD1306_WHITE); // Invert text
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} else {
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display.setTextColor(SSD1306_WHITE);
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}
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display.setCursor(2, y);
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if (itemIndex == 0) {
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display.print(F(">> MENU"));
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} else {
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int stepIndex = itemIndex - 1;
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// Step Number
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if (stepIndex < 10) display.print(F("0"));
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display.print(stepIndex);
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display.print(F(" | "));
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// Note Value
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int n = sequence[stepIndex].note;
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if (n == -1) {
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display.print(F("---"));
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} else {
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// Basic Note to String conversion
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const char* noteNames[] = {"C-", "C#", "D-", "D#", "E-", "F-", "F#", "G-", "G#", "A-", "A#", "B-"};
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display.print(noteNames[n % 12]);
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display.print(n / 12 - 1); // Octave
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}
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}
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y += 9;
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}
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}
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@ -236,43 +481,31 @@ void drawUI() {
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display.setTextColor(SSD1306_WHITE);
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display.setCursor(0, 0);
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// Header
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display.print(F("TRACKER "));
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display.print(isEditing ? F("[EDIT]") : F("[NAV]"));
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display.println();
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switch(currentState) {
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case UI_TRACKER:
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drawTracker();
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break;
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case UI_MENU_MAIN:
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drawMenu("MAIN MENU", mainMenu, mainMenuCount, menuSelection);
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break;
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case UI_MENU_RANDOMIZE:
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drawMenu("RANDOMIZE", randomizeMenu, randomizeMenuCount, menuSelection);
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break;
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case UI_MENU_SETUP:
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drawMenu("SETUP", setupMenu, setupMenuCount, menuSelection);
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break;
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case UI_SETUP_CHANNEL_EDIT:
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display.println(F("SET MIDI CHANNEL"));
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display.drawLine(0, 8, 128, 8, SSD1306_WHITE);
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// Steps
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int y = 10;
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for (int i = scrollOffset; i < min(scrollOffset + 6, NUM_STEPS); i++) {
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// Draw Cursor
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if (i == currentStep) {
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display.fillRect(0, y, 128, 8, SSD1306_WHITE);
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display.setTextColor(SSD1306_BLACK, SSD1306_WHITE); // Invert text
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} else {
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display.setTextColor(SSD1306_WHITE);
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}
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display.setCursor(2, y);
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// Step Number
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if (i < 10) display.print(F("0"));
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display.print(i);
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display.print(F(" | "));
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// Note Value
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int n = sequence[i].note;
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if (n == -1) {
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display.print(F("---"));
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} else {
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// Basic Note to String conversion
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const char* noteNames[] = {"C-", "C#", "D-", "D#", "E-", "F-", "F#", "G-", "G#", "A-", "A#", "B-"};
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display.print(noteNames[n % 12]);
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display.print(n / 12 - 1); // Octave
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}
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y += 9;
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display.setCursor(20, 25);
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display.setTextSize(2);
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display.print(F("CH: "));
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if (midiChannel < 10) display.print(F(" "));
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display.print(midiChannel);
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display.setTextSize(1);
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display.setCursor(0, 50);
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display.println(F(" (Press to confirm)"));
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break;
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}
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display.display();
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@ -285,35 +518,49 @@ int getPixelIndex(int x, int y) {
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return y * 8 + x;
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}
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uint32_t getNoteColor(int note) {
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if (note == -1) return 0;
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// Map note to hue, avoiding Green (approx 21845) which is used for playback cursor.
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// We start from Cyan (~30000) and go up to Orange (~8000 wrapped).
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// Range: 30000 to 65536+8000 = 73536. Width = 43536.
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// Step per semitone: 43536 / 12 = 3628.
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// This ensures notes are distinct colors but never pure Green.
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uint16_t hue = 30000 + (note % 12) * 3628;
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return Adafruit_NeoPixel::ColorHSV(hue, 255, 50);
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}
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void updateLeds() {
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pixels.clear(); // Clear buffer
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for (int s = 0; s < NUM_STEPS; s++) {
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uint32_t color = 0; // Default off
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int stepNavIndex = navigationSelection - 1;
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if (sequence[s].note != -1) {
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color = getNoteColor(sequence[s].note);
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||||
}
|
||||
|
||||
if (currentState == UI_TRACKER && s == stepNavIndex && !isEditing) {
|
||||
color = pixels.Color(40, 40, 40); // White for navigation
|
||||
}
|
||||
|
||||
if (isPlaying && s == playbackStep) {
|
||||
color = pixels.Color(0, 50, 0); // Green for playback (overwrites nav cursor)
|
||||
}
|
||||
|
||||
if (currentState == UI_TRACKER && s == stepNavIndex && isEditing) {
|
||||
color = pixels.Color(50, 0, 0); // Red for editing (highest precedence)
|
||||
}
|
||||
|
||||
if (color != 0) {
|
||||
int blockX = (s % 4) * 2;
|
||||
int blockY = (s / 4) * 2;
|
||||
|
||||
uint32_t color;
|
||||
|
||||
if (s == currentStep) {
|
||||
if (isEditing) {
|
||||
color = pixels.Color(50, 0, 0); // Dim Red for editing
|
||||
} else {
|
||||
color = pixels.Color(40, 40, 40); // Dim White for current step
|
||||
}
|
||||
} else {
|
||||
if (sequence[s].note != -1) {
|
||||
color = pixels.Color(0, 0, 50); // Dim Blue for step with note
|
||||
} else {
|
||||
color = 0; // Off
|
||||
}
|
||||
}
|
||||
|
||||
// Set the 4 pixels for the 2x2 block
|
||||
pixels.setPixelColor(getPixelIndex(blockX, blockY), color);
|
||||
pixels.setPixelColor(getPixelIndex(blockX + 1, blockY), color);
|
||||
pixels.setPixelColor(getPixelIndex(blockX, blockY + 1), color);
|
||||
pixels.setPixelColor(getPixelIndex(blockX + 1, blockY + 1), color);
|
||||
}
|
||||
}
|
||||
|
||||
pixels.show();
|
||||
}
|
||||
|
||||
Loading…
Reference in New Issue
Block a user