using System;
using System.Collections.Generic;
using System.Linq;
using System.Runtime.InteropServices;
using System.Text;

namespace RCUHost.Protocols
{
	[StructLayoutAttribute(LayoutKind.Sequential, CharSet = CharSet.Ansi, Pack = 1)]
	public struct SystemHeader
	{
		#if SIMON
		public const string SYSTEM_ID = "T3SA";
		#else
		public const string SYSTEM_ID = "TSA1";
		#endif

		public const ushort SIGNATURE = 0x55AA;

       	/// <summary>
		/// Magic
		/// </summary>
		public ushort Signature;

		/// <summary>
		/// 帧总字节数，包括头部和数据
		/// </summary>
		public ushort FrameLength;

		/// <summary>
		/// 系统标识
		/// </summary>
		[MarshalAsAttribute(UnmanagedType.ByValArray, SizeConst = 4)]
		public char[] SystemID;

		/// <summary>
		/// 指令代码
		/// </summary>
		public byte CmdType;

		/// <summary>
		/// 帧序号
		/// </summary>
		public ushort FrameNo;

		/// <summary>
		/// 主机编号(房号)
		/// </summary>
		public HostNumber HostNumber;
	}
}