Initial public release of WII5 Buoy firmware

Firmware for an autonomous wave-measurement buoy (ATmega2560-based
WII5 v2 board). Reads wave motion from a Sparton AHRS-M1/M2 IMU,
samples GPS and battery state, and reports back over Iridium SBD
satellite telemetry. Originally developed 2012-2024.

This is the first public release. Code, documentation, and field-tested
operating modes (Capture, Sleep, Position, ManualTest, SelfTest,
LowBattery) are licensed under Apache 2.0 — see LICENSE and NOTICE.

See README.md for an overview and build instructions, CONTRIBUTING.md
for how to contribute, and DEPLOYMENTS.md for the field-deployment log.

WII5Display.h

@@ -0,0 +1,46 @@
+// SPDX-License-Identifier: Apache-2.0
+// Copyright (c) 2012-2024 Scott Penrose <scottp@dd.com.au> and WII5 Buoy contributors
+//
+// This file is part of WII5 Buoy firmware.
+// See LICENSE for full terms.
+
+/**
+ * @file WII5Display.h
+ * @brief Status display helpers: SD-block view, formatted metadata dumps.
+ */
+
+#ifndef WII5Display_h
+#define WII5Display_h
+
+#include <WII5.h>
+
+class WII5Display {
+	public:
+		WII5Display() {}
+		virtual WII5_CONTROLLERS controllerId() {return WII5CONTROLLER_DISPLAY;}
+		void dumpPins();
+
+		// TODO rename - very confusing
+		void statusSend(const __FlashStringHelper *area, const __FlashStringHelper *out, ... );
+
+		uint32_t minutesUntilNext(uint32_t period);
+
+		// Standard commands
+		void atMathsSend(const __FlashStringHelper *area, const __FlashStringHelper *out, ... );
+		void atDataSend(const __FlashStringHelper *area, const __FlashStringHelper *out, ... );
+		void atStatsSend(const __FlashStringHelper *area, const __FlashStringHelper *out, ... );
+		void atCommandSend(const __FlashStringHelper *area, const __FlashStringHelper *out, ... );
+		void atCommsSend(const __FlashStringHelper *area, const __FlashStringHelper *out, ... );
+		void updateMetadata(void* ref = NULL);
+		void printMetadata();
+		void printMetadataBlock(WII5MetaDataObject* metadata);
+		void sdBlockView(uint32_t block, bool view_md, bool view_raw);
+
+	protected:
+		WII5MetaDataObject* metadata;
+
+};
+
+extern WII5Display wii5Display;
+
+#endif