codex init

OpticalChannelTester/Protocol.h

@@ -0,0 +1,39 @@
+#pragma once
+#include "Core.h"
+
+constexpr uint16_t PROTOCOL_MAGIC = 0x4F43;
+constexpr uint8_t PROTOCOL_VERSION = 1;
+
+enum class MessageType : uint8_t {
+  DISCOVER, DISCOVER_ACK, PREPARE, READY, START_STAGE, RESULT, ACK, ABORT
+};
+
+#pragma pack(push, 1)
+struct ProtocolPacket {
+  uint16_t magic;
+  uint8_t version;
+  uint8_t type;
+  uint32_t session;
+  uint16_t stage;
+  uint16_t sequence;
+  uint32_t requestedHz;
+  uint32_t actualHz;
+  uint16_t actualDutyX100;
+  uint32_t testTimeMs;
+  uint8_t repeats;
+  uint16_t accuracyX100;
+  uint8_t settleCycles;
+  uint8_t passed;
+  uint8_t reason;
+  uint32_t periods;
+  uint32_t minPeriodTicks;
+  uint32_t maxPeriodTicks;
+  uint16_t crc;
+};
+#pragma pack(pop)
+
+static_assert(sizeof(ProtocolPacket) == 46, "Protocol layout changed");
+
+uint16_t packetCrc(const ProtocolPacket &packet);
+void finalizePacket(ProtocolPacket &packet);
+bool validPacket(const ProtocolPacket &packet);