refactor(device): add files getter/setter to device

src/mynteye/device/channel/def.h

@@ -15,6 +15,10 @@
 #define MYNTEYE_DEVICE_CHANNEL_DEF_H_
 #pragma once
 
+#include <array>
+#include <cstdint>
+#include <vector>
+
 #include "mynteye/mynteye.h"
 
 MYNTEYE_BEGIN_NAMESPACE
@@ -35,6 +39,73 @@ typedef enum FileId {
   FID_LAST,
 } file_id_t;
 
+/**
+ * @ingroup datatypes
+ * Imu request packet.
+ */
+#pragma pack(push, 1)
+struct ImuReqPacket {
+  std::uint8_t header;
+  std::uint32_t serial_number;
+
+  ImuReqPacket() = default;
+  explicit ImuReqPacket(std::uint32_t serial_number)
+      : ImuReqPacket(0x5A, serial_number) {}
+  ImuReqPacket(std::uint8_t header, std::uint32_t serial_number)
+      : header(header), serial_number(serial_number) {}
+
+  std::array<std::uint8_t, 5> to_data() const {
+    return {{header, static_cast<std::uint8_t>((serial_number >> 24) & 0xFF),
+             static_cast<std::uint8_t>((serial_number >> 16) & 0xFF),
+             static_cast<std::uint8_t>((serial_number >> 8) & 0xFF),
+             static_cast<std::uint8_t>(serial_number & 0xFF)}};
+  }
+};
+#pragma pack(pop)
+
+/**
+ * @ingroup datatypes
+ * Imu segment.
+ */
+#pragma pack(push, 1)
+struct ImuSegment {
+  std::uint32_t frame_id;
+  std::uint64_t timestamp;
+  std::uint8_t flag;
+  std::int16_t temperature;
+  std::int16_t accel[3];
+  std::int16_t gyro[3];
+};
+#pragma pack(pop)
+
+/**
+ * @ingroup datatypes
+ * Imu packet.
+ */
+#pragma pack(push, 1)
+struct ImuPacket {
+  std::uint8_t version;
+  std::uint8_t count;
+  std::uint32_t serial_number;
+  std::vector<ImuSegment> segments;
+};
+#pragma pack(pop)
+
+/**
+ * @ingroup datatypes
+ * Imu response packet.
+ */
+#pragma pack(push, 1)
+struct ImuResPacket {
+  std::uint8_t version;
+  std::uint8_t header;
+  std::uint8_t state;
+  std::uint16_t size;
+  std::vector<ImuPacket> packets;
+  std::uint8_t checksum;
+};
+#pragma pack(pop)
+
 MYNTEYE_END_NAMESPACE
 
 #endif  // MYNTEYE_DEVICE_CHANNEL_DEF_H_