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1.8.4及以上的固件才支持
namespace USB2XXX
{
    class USB2MELIBU
    {
        //定义函数返回错误代码
        public const int MELIBU_SUCCESS            = (0);   //函数执行成功
        public const int MELIBU_ERR_NOT_SUPPORT    = (-1);  //适配器不支持该函数
        public const int MELIBU_ERR_USB_WRITE_FAIL = (-2);  //USB写数据失败
        public const int MELIBU_ERR_USB_READ_FAIL  = (-3);  //USB读数据失败
        public const int MELIBU_ERR_CMD_FAIL       = (-4);  //命令执行失败
        public const int MELIBU_ERR_PARAMETER     = (-5);  //参数错误
        //命令值宏定义
        public const byte MELIBU_TX  = 0;  //主机发送数据给从机
        public const byte MELIBU_RX  = 1;  //主机向从机读数据
        //消息状态定义
        public const byte MELIBU_STATUS_NACK     = 0x01;//写无应答(非广播帧)
        public const byte MELIBU_STATUS_RNRES    = 0x02;//读数据无应答
        public const byte MELIBU_STATUS_ECRC     = 0x04;//CRC校验错误
        public const byte MELIBU_STATUS_FERR     = 0x08;//帧异常，实际字节数跟规定的不匹配
        public const byte MELIBU_STATUS_DLEN     = 0x10;//实际数据字节数跟帧头字节数不匹配
        public const byte MELIBU_STATUS_PERR     = 0x20;//P0 P1错误

        //ELINS帧类型定义
        [StructLayout(LayoutKind.Sequential, CharSet = CharSet.Ansi)]  
        public struct MELIBU_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，一般为13
            [MarshalAs(UnmanagedType.U1)]
            public byte Status;         //当前帧状态指示，接收时有效，指示帧异常状态
            [MarshalAs(UnmanagedType.U1)]
            public byte ACKValue;       //应答值，发送数据时存储对方应答数据
            [MarshalAs(UnmanagedType.U1)]
            public byte MsgMode;        //0-普通模式，1-扩展模式
            [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;      //接收帧时为时间戳低位，单位为10us，发送数据时为跟下一帧的间隔时间，单位为微秒(us)
            [MarshalAs(UnmanagedType.U2)]
            public ushort ID;           //ID值，可以通过调用 @ref MeLiBu_GetID 函数获取
            [MarshalAs(UnmanagedType.U2)]
            public ushort Crc16;        //发送数据时不用填，底层会自动计算，接收时代表接收到的CRC值
            [MarshalAs(UnmanagedType.ByValArray, SizeConst = 128, ArraySubType = UnmanagedType.U1)]
            public byte[] Data;	        //数据存储数组，里面包含的有效数据字节数由DataLen决定
        }
        [DllImport("USB2XXX.dll")]
        public static extern int MeLiBu_Init(int DevHandle, byte Index, uint BaudRate, byte MasterMode, byte ResEnable);
        [DllImport("USB2XXX.dll")]
        public static extern int MeLiBu_MasterStartSch(int DevHandle, byte Index, MELIBU_MSG[] pMsg, uint MsgLen, uint SendTimes, byte ReadBackFlag);
        [DllImport("USB2XXX.dll")]
        public static extern int MeLiBu_GetMsg(int DevHandle, byte Index, IntPtr pMsg, uint BufferSize);
        [DllImport("USB2XXX.dll")]
        public static extern ushort MeLiBu_GetID(byte MsgMode, byte SlaveAddr, byte RT, byte F, byte dlc,byte InstrExt);
        [DllImport("USB2XXX.dll")]
        public static extern int MeLiBu_MasterStopSch(int DevHandle, byte Index);
        [DllImport("USB2XXX.dll")]
        public static extern int MeLiBu_Stop(int DevHandle, byte Index);
        [DllImport("USB2XXX.dll")]
        public static extern int MeLiBu_GetStartTime(int DevHandle, byte Index);
    }
}