codex init

OpticalChannelTester/Display.h

@@ -0,0 +1,19 @@
+#pragma once
+#include <Arduino.h>
+#include <Adafruit_GFX.h>
+#include <Adafruit_SSD1306.h>
+
+class Display {
+ public:
+  Display();
+  bool begin();
+  void show(const char *line1, const char *line2);
+  bool available() const { return ok_; }
+  static void formatFrequency(float hz, char *out, size_t size);
+  static void formatDuration(uint64_t us, char *out, size_t size);
+ private:
+  void fit(char *text);
+  Adafruit_SSD1306 oled_;
+  bool ok_ = false;
+};
+