codex init

OpticalChannelTester/Buttons.h

@@ -0,0 +1,17 @@
+#pragma once
+#include <Arduino.h>
+
+enum class ButtonEvent : uint8_t { NONE, SHORT, LONG, REPEAT };
+
+class Button {
+ public:
+  explicit Button(uint8_t pin) : pin_(pin) {}
+  void begin();
+  ButtonEvent update(uint32_t nowMs);
+  bool pressed() const { return stable_; }
+ private:
+  uint8_t pin_;
+  bool raw_ = false, stable_ = false, longSent_ = false;
+  uint32_t changedAt_ = 0, pressedAt_ = 0, nextRepeat_ = 0;
+};
+