Windows上位机使用HidSharp进行HID通信

HID通信

HID上位机通信库有很多,比如hidsharp,libusbhidnet,cyusb,usbclasslibrary.... 。这里使用hidsharp这个库，此库功能非常强大和稳定
HID 发送接收测试代码

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public void connect()
{
    MyDevice = List.GetHidDevices(0x0480, 0x5850).FirstOrDefault();
    if (MyDevice != null && MyDevice.TryOpen(out Stream))
    {
        uIData.DevSta = "|  设备：已连接";
        info();
        //Buffer = new byte[65]; // 65
        Stream.ReadTimeout = Timeout.Infinite;
        //Result = Stream.BeginRead(Buffer, 0, 65, new AsyncCallback(BytesReady), null); // 64

        rec = new HidDeviceInputReceiver(MyDevice.GetReportDescriptor());
        rec.Received += Rec_Received;
        rec.Start(Stream);

        //Stream.ReadAsync(Buffer, 0, 64);
        //连接时 获取仪器型号数据
        string cmd = "*IDN?\r\n";
        send_data(CMD_TYPE.GET_INFO_INDS, Encoding.Default.GetBytes(cmd), (byte)cmd.Length);
    }
    else
    {
        uIData.DevSta = "|  设备：未连接";
        uIData.Manufacturer = "";
        uIData.Production = "";
        uIData.SerialNum = "";
        uIData.Device = "";
    }
}
//通信协议
//第一字节表示长度
//第二字节表示类型
//后边表示数据  文本表示
public enum CMD_TYPE
{
    GET_INFO_INDS = 0,
    GET_REL_VALUE,
    GET_MES_VALUE,
    SET_AC_VOLTAGE,
    SET_DC_VOLTAGE,
    SET_RELAY_VALUE,
    SET_PARAM_VALUE,
    SET_START_REC,
    SET_STOP_REC,
};
public void send_data(CMD_TYPE type, byte[] data, byte len)
{
    try
    {
        byte[] buf = new byte[MyDevice.GetMaxOutputReportLength()];
        buf[0] = 0;  //第一个字节存放Report ID 下位机会自动去掉ID
        buf[1] = len;  //后边数据长度
        buf[2] = (byte)type;  //命令类型
        Array.Copy(data, 0, buf, 3, len);
        Stream.Write(buf);
    }
    catch (Exception ex)
    {

        Console.WriteLine(ex.Message);
    }
}
private void List_Changed(object sender, DeviceListChangedEventArgs e)
{
    connect();

}
public void info()
{
    uIData.Manufacturer = "|  " + MyDevice.GetManufacturer();
    uIData.Production = "|  " + MyDevice.GetProductName();
    uIData.SerialNum = "|  " + MyDevice.GetSerialNumber();
    Console.WriteLine(MyDevice.DevicePath);
    //Console.WriteLine(string.Join(",", MyDevice.GetDevicePathHierarchy())); // TODO
    Console.WriteLine(MyDevice);

    try
    {
        Console.WriteLine(string.Format("Max Lengths: Input {0}, Output {1}, Feature {2}",
            MyDevice.GetMaxInputReportLength(),
            MyDevice.GetMaxOutputReportLength(),
            MyDevice.GetMaxFeatureReportLength()));
    }
    catch (UnauthorizedAccessException e)
    {
        Console.WriteLine(e);
        Console.WriteLine();
        return;
    }

    try
    {
        Console.WriteLine("Serial Ports: {0}", string.Join(",", MyDevice.GetSerialPorts()));
    }
    catch
    {
        Console.WriteLine("Serial Ports: Unknown on this platform.");
    }

    try
    {
        var rawReportDescriptor = MyDevice.GetRawReportDescriptor();
        Console.WriteLine("Report Descriptor:");
        Console.WriteLine("  {0} ({1} bytes)", string.Join(" ", rawReportDescriptor.Select(d => d.ToString("X2"))), rawReportDescriptor.Length);

        int indent = 0;
        foreach (var element in EncodedItem.DecodeItems(rawReportDescriptor, 0, rawReportDescriptor.Length))
        {
            if (element.ItemType == ItemType.Main && element.TagForMain == MainItemTag.EndCollection) { indent -= 2; }

            Console.WriteLine("  {0}{1}", new string(' ', indent), element);

            if (element.ItemType == ItemType.Main && element.TagForMain == MainItemTag.Collection) { indent += 2; }
        }

        var reportDescriptor = MyDevice.GetReportDescriptor();

        foreach (var deviceItem in reportDescriptor.DeviceItems)
        {
            foreach (var usage in deviceItem.Usages.GetAllValues())
            {
                Console.WriteLine(string.Format("Usage: {0:X4} {1}", usage, (Usage)usage));
            }
            foreach (var report in deviceItem.Reports)
            {
                Console.WriteLine(string.Format("{0}: ReportID={1}, Length={2}, Items={3}",
                                    report.ReportType, report.ReportID, report.Length, report.DataItems.Count));
                foreach (var dataItem in report.DataItems)
                {
                    Console.WriteLine(string.Format("  {0} Elements x {1} Bits, Units: {2}, Expected Usage Type: {3}, Flags: {4}, Usages: {5}",
                        dataItem.ElementCount, dataItem.ElementBits, dataItem.Unit.System, dataItem.ExpectedUsageType, dataItem.Flags,
                        string.Join(", ", dataItem.Usages.GetAllValues().Select(usage => usage.ToString("X4") + " " + ((Usage)usage).ToString()))));
                }
            }
        }
    }
    catch (Exception)
    { }
}
int num = 0;
private void Rec_Received(object sender, EventArgs e)
{
    try
    {
        byte[] buf = new byte[MyDevice.GetMaxInputReportLength()];
        Report report;
        rec.TryRead(buf, 0, out report);
        foreach (byte b in buf)
        {
            Console.Write("{0:X2} ", b);
        }
        Console.WriteLine("\r\n");



        switch ((CMD_TYPE)buf[2])
        {
            case CMD_TYPE.GET_INFO_INDS:   //仪器数据 
                byte[] data = new byte[buf[1]];
                Array.Copy(buf, 3, data, 0, buf[1]);
                string value = Encoding.Default.GetString(data);
                Console.WriteLine(value);
                uIData.Device = "|  " + value;
                break;
            case CMD_TYPE.GET_REL_VALUE:

                for (int i = 0; i < buf[1] / 4; i++)
                {
                    byte[] b = new byte[4]; //double是8字节
                    Array.Copy(buf, 3 + i * 4, b, 0, 4);
                    //Array.Reverse(voltage);//转为大端数据 经过测试不需要转换
                    //foreach (byte b in b)
                    //{
                    //    Console.Write("{0:X2} ", b);
                    //}
                    //Console.WriteLine("\r\n");
                    float v = BitConverter.ToSingle(b, 0);
                    double d = Math.Round(v, 3);
                    uIData.Voltage = d.ToString();
                    Console.WriteLine("REL --->:" + d);//保留3位小数
                }
                break;
            case CMD_TYPE.GET_MES_VALUE:
                double[] voltage = new double[uIData.IsBridgeOut ? 4 : 8];
                for (int i = 0; i < buf[1] / 4; i++)
                {
                    byte[] b = new byte[4]; //double是8字节
                    Array.Copy(buf, 3 + i * 4, b, 0, 4);
                    //Array.Reverse(voltage);//转为大端数据 经过测试不需要转换
                    //foreach (byte b in b)
                    //{
                    //    Console.Write("{0:X2} ", b);
                    //}
                    //Console.WriteLine("\r\n");
                    float v = BitConverter.ToSingle(b, 0);
                    double d = Math.Round(v, 3);
                    voltage[i] = d;
                    Console.WriteLine("MES--->:" + d);//保留3位小数
                }
                
                num++;
                if (num >= uIData.SampleNum)
                {
                    //停止采集
                    StopRec_Click(null, new RoutedEventArgs());
                    //数据插入数据库中
                    //导出数据
                    Export_Excel(uIData.AmpName1, uIData.Barcode1, uIData.YearWeek1, dv1);
                    Export_Excel(uIData.AmpName2, uIData.Barcode2, uIData.YearWeek2, dv2);
                    uIData.Barcode1 = "";
                    uIData.Barcode2 = "";
                    Barcode1.Focus();
                    StartRec.IsEnabled = false;
                    StopRec.IsEnabled = false;
                }
                break;
        }

    }
    catch (Exception ee)
    {

        Console.WriteLine(ee.Message);
    }

}
//异步读取
private void BytesReady(IAsyncResult result)
{
    try
    {

        string s = ($"Bytes Read = {Stream.EndRead(result)} ");
        Console.WriteLine(s);
        foreach (byte b in Buffer)
        {
            Console.WriteLine(b.ToString("X2"));
        }

        result = Stream.BeginRead(Buffer, 0, 65, new AsyncCallback(BytesReady), null); // 64

    }
    catch (Exception ex)
    {
        MessageBox.Show(ex.Message);
    }
}