Playing notes over I2S

UIThread.cpp

@@ -1,90 +1,12 @@
 #include "UIThread.h"
 #include "SharedState.h"
-#include <Wire.h>
-
-// --- Local State ---
-static int g_last_clk_state;
-
-// --- Forward Declarations ---
-static void readEncoder();
-static void updateDisplay();
+#include <Arduino.h>
 
 void setupUI() {
-  // --- Initialize I2C and Display ---
-  Wire.setSDA(OLED_SDA_PIN);
-  Wire.setSCL(OLED_SCL_PIN);
-  Wire.begin();
-
-  if (!display.begin(SSD1306_SWITCHCAPVCC, 0x3C)) { // Address 0x3C for 128x64
-    Serial.println(F("SSD1306 allocation failed"));
-    for (;;); // Don't proceed, loop forever
-  }
-  display.clearDisplay();
-  display.setTextColor(SSD1306_WHITE);
-  display.setTextSize(1);
-  display.println("NoiceSynth Booting...");
-  display.display();
-  delay(1000);
-
-  // --- Initialize Controls ---
-  pinMode(ENCODER_CLK_PIN, INPUT_PULLUP);
-  pinMode(ENCODER_DT_PIN, INPUT_PULLUP);
-  pinMode(ENCODER_SW_PIN, INPUT_PULLUP);
-  g_last_clk_state = digitalRead(ENCODER_CLK_PIN);
+  // This is the UI thread, running on core 0. For this example, we do nothing here.
 }
 
 void loopUI() {
-  // Read the volume potentiometer (Pico ADC is 12-bit, 0-4095)
-  // We use a bit of filtering by averaging with the old value to reduce noise.
-  float new_volume = analogRead(VOL_POT_PIN) / 4095.0f;
-  g_volume = (g_volume * 0.95) + (new_volume * 0.05);
-
-  // Read the rotary encoder
-  readEncoder();
-
-  // Update the display periodically
-  static uint32_t last_display_update = 0;
-  if (millis() - last_display_update > 100) { // Update 10 times/sec
-    last_display_update = millis();
-    updateDisplay();
-  }
-}
-
-static void updateDisplay() {
-  display.clearDisplay();
-  display.setCursor(0, 0);
-
-  display.println(F("    NoiceSynth"));
-  display.println(F("--------------------"));
-
-  if (g_note_on) {
-    display.print(F("Note Freq: "));
-    display.print(g_note_frequency, 2);
-    display.println(F(" Hz"));
-  } else {
-    display.println(F("Note: Off"));
-  }
-
-  display.print(F("Volume: "));
-  display.print(static_cast<int>(g_volume * 100));
-  display.println(F("%"));
-
-  display.print(F("Encoder: "));
-  display.println(g_encoder_value);
-
-  display.display();
-}
-
-static void readEncoder() {
-  int new_clk_state = digitalRead(ENCODER_CLK_PIN);
-  // Check for a change on the CLK pin (a "tick" of the encoder)
-  if (new_clk_state != g_last_clk_state && new_clk_state == LOW) {
-    // Read the DT pin to determine direction
-    if (digitalRead(ENCODER_DT_PIN) == LOW) {
-      g_encoder_value++; // Clockwise
-    } else {
-      g_encoder_value--; // Counter-clockwise
-    }
-  }
-  g_last_clk_state = new_clk_state;
+  // The loop on core 0 is responsible for updating the UI. In this simple example, it does nothing.
+  delay(100);
 }