using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Runtime.InteropServices;
//注意：使用这些函数需要1.5.30及以上的固件才支持
namespace USB2XXX
{
    class USB2ELINS
    {
        //定义函数返回错误代码
        public const int ELINS_SUCCESS            = (0);   //函数执行成功
        public const int ELINS_ERR_NOT_SUPPORT    = (-1);  //适配器不支持该函数
        public const int ELINS_ERR_USB_WRITE_FAIL = (-2);  //USB写数据失败
        public const int ELINS_ERR_USB_READ_FAIL  = (-3);  //USB读数据失败
        public const int ELINS_ERR_CMD_FAIL       = (-4);  //命令执行失败
        public const int ELINS_ERR_PARAMETER     = (-5);  //参数错误
        //命令值宏定义
        public const byte ELINS_CMD_SDW  = 2;  //Single Device Write
        public const byte ELINS_CMD_SDR  = 3;  //Single Device Read
        public const byte ELINS_CMD_BW   = 4;  //Broadcast Write
        public const byte ELINS_CMD_EBW  = 5;  //Enhance Broadcast Write
        public const byte ELINS_CMD_ESDW = 6;  //Enhance Single Device Write
        public const byte ELINS_CMD_ESDR = 7;  //Enhance Single Device Read
        //消息状态定义
        public const byte ELINS_STATUS_NACK     = 0x01;//写无应答(非广播帧)
        public const byte ELINS_STATUS_RNRES    = 0x02;//读数据无应答
        public const byte ELINS_STATUS_ECRC     = 0x04;//CRC校验错误
        public const byte ELINS_STATUS_FERR     = 0x08;//帧异常，实际字节数跟规定的不匹配
        public const byte ELINS_STATUS_DLEN     = 0x10;//实际数据字节数跟帧头字节数不匹配

        //ELINS帧类型定义
        [StructLayout(LayoutKind.Sequential, CharSet = CharSet.Ansi)]  
        public struct ELINS_MSG
        {
            [MarshalAs(UnmanagedType.U1)]
            public byte  DataLen;//Data域中有效数据字节数
            [MarshalAs(UnmanagedType.U1)]
            public byte  BreakBits;    //发送同步间隔宽度
            [MarshalAs(UnmanagedType.U1)]
            public byte Status;    //当前帧状态指示，比如帧数据异常可以在这里显示
            [MarshalAs(UnmanagedType.U1)]
            public byte Flags;             ///<bit[0..1]表示通道号
            [MarshalAs(UnmanagedType.U1)]
            public byte SYNC;             ///<固定为0x55
            [MarshalAs(UnmanagedType.U1)]
            public byte TimeStampHigh;  //时间戳高位
            [MarshalAs(UnmanagedType.U2)]
            public short MsgSendTimes;   //当前帧发送次数
            [MarshalAs(UnmanagedType.U4)]
            public uint TimeStamp;      //时间戳低位，单位为10us
            [MarshalAs(UnmanagedType.U1)]
            public byte CmdCode;          ///<命令
            [MarshalAs(UnmanagedType.U1)]
            public byte DevID;
            [MarshalAs(UnmanagedType.U2)]
            public short RegAddr;
            [MarshalAs(UnmanagedType.U2)]
            public short Crc16;
            [MarshalAs(UnmanagedType.ByValArray, SizeConst = 64, ArraySubType = UnmanagedType.U1)]
            public byte[] Data;	    //数据
            [MarshalAs(UnmanagedType.ByValArray, SizeConst = 4, ArraySubType = UnmanagedType.U1)]
            public byte[] ACKValue;    //应答值
        }
        [DllImport("USB2XXX.dll")]
        public static extern int ELINS_Init(int DevHandle, byte Index, uint BaudRate, byte MasterMode, byte ResEnable, byte Ver);
        [DllImport("USB2XXX.dll")]
        public static extern int ELINS_MasterStartSch(int DevHandle, byte Index, ELINS_MSG[] pMsg, uint MsgLen, uint SendTimes, byte ReadBackFlag);
        [DllImport("USB2XXX.dll")]
        public static extern int ELINS_GetMsg(int DevHandle, byte Index, IntPtr pMsg, uint BufferSize);
        [DllImport("USB2XXX.dll")]
        public static extern int ELINS_MasterStopSch(int DevHandle, byte Index);
        [DllImport("USB2XXX.dll")]
        public static extern int ELINS_Stop(int DevHandle, byte Index);
        [DllImport("USB2XXX.dll")]
        public static extern int ELINS_GetStartTime(int DevHandle, byte Index);
    }
}