使用C#使用Windows的HID通信
Windows使用HID通信相对比较简单，HID都是通过PID、VID信息来查找连接的，相比于串口，几乎无变化，连接无需人工选择，十分方便，也不需要驱动。
下面上实例，PID为0x003f，VID为0x04D8，支持发送接收数据显示到UI，使用C#来编写，调用的是windows api（create file、read file、write file）。
本实例将HID接口分成3层，支持自动连接、断开状态通知，异步收发数据，单个数据包大小为64bytes（因为从设备的数据包设定为64bytes，保持一致）。
接口分为两层，第一层将create file、read file、write file封装，第二层再封装自动连接、异步收发。
HID.cs -> HIDInterface.cs -> 应用
注意，这里所有数据都是64bytes，但是有用数据并非这么多，所以设定为第一个数据为后面数据实际长度，若需要修改定义，请在HIDInterface.cs的Send与HidDataReceived函数中修改处理方法即可。
HID.cs
using System; using System.Collections.Generic; using System.Runtime.InteropServices; using System.IO; using Microsoft.Win32.SafeHandles; using System.Windows; namespace HID_SIMPLE.HID { public class report : EventArgs { public readonly byte reportID; public readonly byte[] reportBuff; public report(byte id, byte[] arrayBuff) { reportID = id; reportBuff = arrayBuff; } } public class Hid : object { private IntPtr INVALID_HANDLE_VALUE = new IntPtr(-1); private const int MAX_USB_DEVICES = 64; private bool deviceOpened = false; private FileStream hidDevice = null; private IntPtr hHubDevice; int outputReportLength;//输出报告长度,包刮一个字节的报告ID public int OutputReportLength { get { return outputReportLength; } } int inputReportLength;//输入报告长度,包刮一个字节的报告ID public int InputReportLength { get { return inputReportLength; } } /// <summary> /// 打开指定信息的设备 /// </summary> /// <param name="vID">设备的vID</param> /// <param name="pID">设备的pID</param> /// <param name="serial">设备的serial</param> /// <returns></returns> public HID_RETURN OpenDevice(UInt16 vID, UInt16 pID, string serial) { if (deviceOpened == false) { //获取连接的HID列表 List<string> deviceList = new List<string>(); GetHidDeviceList(ref deviceList); if (deviceList.Count == 0) return HID_RETURN.NO_DEVICE_CONECTED; for (int i = 0; i < deviceList.Count; i++) { IntPtr device = CreateFile(deviceList[i], DESIREDACCESS.GENERIC_READ | DESIREDACCESS.GENERIC_WRITE, 0, 0, CREATIONDISPOSITION.OPEN_EXISTING, FLAGSANDATTRIBUTES.FILE_FLAG_OVERLAPPED, 0); if (device != INVALID_HANDLE_VALUE) { HIDD_ATTRIBUTES attributes; IntPtr serialBuff = Marshal.AllocHGlobal(512); HidD_GetAttributes(device, out attributes); HidD_GetSerialNumberString(device, serialBuff, 512); string deviceStr = Marshal.PtrToStringAuto(serialBuff); Marshal.FreeHGlobal(serialBuff); if (attributes.VendorID == vID && attributes.ProductID == pID && deviceStr.Contains(serial)) { IntPtr preparseData; HIDP_CAPS caps; HidD_GetPreparsedData(device, out preparseData); HidP_GetCaps(preparseData, out caps); HidD_FreePreparsedData(preparseData); outputReportLength = caps.OutputReportByteLength; inputReportLength = caps.InputReportByteLength; hidDevice = new FileStream(new SafeFileHandle(device, false), FileAccess.ReadWrite, inputReportLength, true); deviceOpened = true; BeginAsyncRead(); hHubDevice = device; return HID_RETURN.SUCCESS; } } } return HID_RETURN.DEVICE_NOT_FIND; } else return HID_RETURN.DEVICE_OPENED; } /// <summary> /// 关闭打开的设备 /// </summary> public void CloseDevice() { if (deviceOpened == true) { deviceOpened = false; hidDevice.Close(); } } /// <summary> /// 开始一次异步读 /// </summary> private void BeginAsyncRead() { byte[] inputBuff = new byte[InputReportLength]; hidDevice.BeginRead(inputBuff, 0, InputReportLength, new AsyncCallback(ReadCompleted), inputBuff); } /// <summary> /// 异步读取结束,发出有数据到达事件 /// </summary> /// <param name="iResult">这里是输入报告的数组</param> private void ReadCompleted(IAsyncResult iResult) { byte[] readBuff = (byte[])(iResult.AsyncState); try { hidDevice.EndRead(iResult);//读取结束,如果读取错误就会产生一个异常 byte[] reportData = new byte[readBuff.Length - 1]; for (int i = 1; i < readBuff.Length; i++) reportData[i - 1] = readBuff[i]; report e = new report(readBuff[0], reportData); OnDataReceived(e); //发出数据到达消息 if (!deviceOpened) return; BeginAsyncRead();//启动下一次读操作 } catch //读写错误,设备已经被移除 { //MyConsole.WriteLine("设备无法连接，请重新插入设备"); EventArgs ex = new EventArgs(); OnDeviceRemoved(ex);//发出设备移除消息 CloseDevice(); } } public delegate void DelegateDataReceived(object sender, report e); //public event EventHandler<ConnectEventArg> StatusConnected; public DelegateDataReceived DataReceived; /// <summary> /// 事件:数据到达,处理此事件以接收输入数据 /// </summary> protected virtual void OnDataReceived(report e) { if (DataReceived != null) DataReceived(this, e); } /// <summary> /// 事件:设备断开 /// </summary> public delegate void DelegateStatusConnected(object sender, EventArgs e); public DelegateStatusConnected DeviceRemoved; protected virtual void OnDeviceRemoved(EventArgs e) { if (DeviceRemoved != null) DeviceRemoved(this,e); } /// <summary> /// /// </summary> /// <param name="buffer"></param> /// <returns></returns> public HID_RETURN Write(report r) { if (deviceOpened) { try { byte[] buffer = new byte[outputReportLength]; buffer[0] = r.reportID; int maxBufferLength = 0; if (r.reportBuff.Length < outputReportLength - 1) maxBufferLength = r.reportBuff.Length; else maxBufferLength = outputReportLength - 1; for (int i = 0; i < maxBufferLength; i++) buffer[i + 1] = r.reportBuff[i]; hidDevice.Write(buffer, 0, OutputReportLength); return HID_RETURN.SUCCESS; } catch { EventArgs ex = new EventArgs(); OnDeviceRemoved(ex);//发出设备移除消息 CloseDevice(); return HID_RETURN.NO_DEVICE_CONECTED; } } return HID_RETURN.WRITE_FAILD; } /// <summary> /// 获取所有连接的hid的设备路径 /// </summary> /// <returns>包含每个设备路径的字符串数组</returns> public static void GetHidDeviceList(ref List<string> deviceList) { Guid hUSB = Guid.Empty; uint index = 0; deviceList.Clear(); // 取得hid设备全局id HidD_GetHidGuid(ref hUSB); //取得一个包含所有HID接口信息集合的句柄 IntPtr hidInfoSet = SetupDiGetClassDevs(ref hUSB, 0, IntPtr.Zero, DIGCF.DIGCF_PRESENT | DIGCF.DIGCF_DEVICEINTERFACE); if (hidInfoSet != IntPtr.Zero) { SP_DEVICE_INTERFACE_DATA interfaceInfo = new SP_DEVICE_INTERFACE_DATA(); interfaceInfo.cbSize = Marshal.SizeOf(interfaceInfo); //查询集合中每一个接口 for (index = 0; index < MAX_USB_DEVICES; index++) { //得到第index个接口信息 if (SetupDiEnumDeviceInterfaces(hidInfoSet, IntPtr.Zero, ref hUSB, index, ref interfaceInfo)) { int buffsize = 0; // 取得接口详细信息:第一次读取错误,但可以取得信息缓冲区的大小 SetupDiGetDeviceInterfaceDetail(hidInfoSet, ref interfaceInfo, IntPtr.Zero, buffsize, ref buffsize, null); //构建接收缓冲 IntPtr pDetail = Marshal.AllocHGlobal(buffsize); SP_DEVICE_INTERFACE_DETAIL_DATA detail = new SP_DEVICE_INTERFACE_DETAIL_DATA(); detail.cbSize = Marshal.SizeOf(typeof(SP_DEVICE_INTERFACE_DETAIL_DATA)); Marshal.StructureToPtr(detail, pDetail, false); if (SetupDiGetDeviceInterfaceDetail(hidInfoSet, ref interfaceInfo, pDetail, buffsize, ref buffsize, null)) { deviceList.Add(Marshal.PtrToStringAuto((IntPtr)((int)pDetail + 4))); } Marshal.FreeHGlobal(pDetail); } } } SetupDiDestroyDeviceInfoList(hidInfoSet); //return deviceList.ToArray(); } #region<连接USB返回的结构体信息> /// <summary> /// 连接USB返回的结构体信息 /// </summary> public enum HID_RETURN { SUCCESS = 0, NO_DEVICE_CONECTED, DEVICE_NOT_FIND, DEVICE_OPENED, WRITE_FAILD, READ_FAILD } #endregion // 以下是调用windows的API的函数 /// <summary> /// The HidD_GetHidGuid routine returns the device interface GUID for HIDClass devices. /// </summary> /// <param name="HidGuid">a caller-allocated GUID buffer that the routine uses to return the device interface GUID for HIDClass devices.</param> [DllImport("hid.dll")] private static extern void HidD_GetHidGuid(ref Guid HidGuid); /// <summary> /// The SetupDiGetClassDevs function returns a handle to a device information set that contains requested device information elements for a local machine. /// </summary> /// <param name="ClassGuid">GUID for a device setup class or a device interface class. </param> /// <param name="Enumerator">A pointer to a NULL-terminated string that supplies the name of a PnP enumerator or a PnP device instance identifier. </param> /// <param name="HwndParent">A handle of the top-level window to be used for a user interface</param> /// <param name="Flags">A variable that specifies control options that filter the device information elements that are added to the device information set. </param> /// <returns>a handle to a device information set </returns> [DllImport("setupapi.dll", SetLastError = true)] private static extern IntPtr SetupDiGetClassDevs(ref Guid ClassGuid, uint Enumerator, IntPtr HwndParent, DIGCF Flags); /// <summary> /// The SetupDiDestroyDeviceInfoList function deletes a device information set and frees all associated memory. /// </summary> /// <param name="DeviceInfoSet">A handle to the device information set to delete.</param> /// <returns>returns TRUE if it is successful. Otherwise, it returns FALSE </returns> [DllImport("setupapi.dll", CharSet = CharSet.Auto, SetLastError = true)] private static extern Boolean SetupDiDestroyDeviceInfoList(IntPtr deviceInfoSet); /// <summary> /// The SetupDiEnumDeviceInterfaces function enumerates the device interfaces that are contained in a device information set. /// </summary> /// <param name="deviceInfoSet">A pointer to a device information set that contains the device interfaces for which to return information</param> /// <param name="deviceInfoData">A pointer to an SP_DEVINFO_DATA structure that specifies a device information element in DeviceInfoSet</param> /// <param name="interfaceClassGuid">a GUID that specifies the device interface class for the requested interface</param> /// <param name="memberIndex">A zero-based index into the list of interfaces in the device information set</param> /// <param name="deviceInterfaceData">a caller-allocated buffer that contains a completed SP_DEVICE_INTERFACE_DATA structure that identifies an interface that meets the search parameters</param> /// <returns></returns> [DllImport("setupapi.dll", CharSet = CharSet.Auto, SetLastError = true)] private static extern Boolean SetupDiEnumDeviceInterfaces(IntPtr deviceInfoSet, IntPtr deviceInfoData, ref Guid interfaceClassGuid, UInt32 memberIndex, ref SP_DEVICE_INTERFACE_DATA deviceInterfaceData); /// <summary> /// The SetupDiGetDeviceInterfaceDetail function returns details about a device interface. /// </summary> /// <param name="deviceInfoSet">A pointer to the device information set that contains the interface for which to retrieve details</param> /// <param name="deviceInterfaceData">A pointer to an SP_DEVICE_INTERFACE_DATA structure that specifies the interface in DeviceInfoSet for which to retrieve details</param> /// <param name="deviceInterfaceDetailData">A pointer to an SP_DEVICE_INTERFACE_DETAIL_DATA structure to receive information about the specified interface</param> /// <param name="deviceInterfaceDetailDataSize">The size of the DeviceInterfaceDetailData buffer</param> /// <param name="requiredSize">A pointer to a variable that receives the required size of the DeviceInterfaceDetailData buffer</param> /// <param name="deviceInfoData">A pointer buffer to receive information about the device that supports the requested interface</param> /// <returns></returns> [DllImport("setupapi.dll", SetLastError = true, CharSet = CharSet.Auto)] private static extern bool SetupDiGetDeviceInterfaceDetail(IntPtr deviceInfoSet, ref SP_DEVICE_INTERFACE_DATA deviceInterfaceData, IntPtr deviceInterfaceDetailData, int deviceInterfaceDetailDataSize, ref int requiredSize, SP_DEVINFO_DATA deviceInfoData); /// <summary> /// The HidD_GetAttributes routine returns the attributes of a specified top-level collection. /// </summary> /// <param name="HidDeviceObject">Specifies an open handle to a top-level collection</param> /// <param name="Attributes">a caller-allocated HIDD_ATTRIBUTES structure that returns the attributes of the collection specified by HidDeviceObject</param> /// <returns></returns> [DllImport("hid.dll")] private static extern Boolean HidD_GetAttributes(IntPtr hidDeviceObject, out HIDD_ATTRIBUTES attributes); /// <summary> /// The HidD_GetSerialNumberString routine returns the embedded string of a top-level collection that identifies the serial number of the collection's physical device. /// </summary> /// <param name="HidDeviceObject">Specifies an open handle to a top-level collection</param> /// <param name="Buffer">a caller-allocated buffer that the routine uses to return the requested serial number string</param> /// <param name="BufferLength">Specifies the length, in bytes, of a caller-allocated buffer provided at Buffer</param> /// <returns></returns> [DllImport("hid.dll")] private static extern Boolean HidD_GetSerialNumberString(IntPtr hidDeviceObject, IntPtr buffer, int bufferLength); /// <summary> /// The HidD_GetPreparsedData routine returns a top-level collection's preparsed data. /// </summary> /// <param name="hidDeviceObject">Specifies an open handle to a top-level collection. </param> /// <param name="PreparsedData">Pointer to the address of a routine-allocated buffer that contains a collection's preparsed data in a _HIDP_PREPARSED_DATA structure.</param> /// <returns>HidD_GetPreparsedData returns TRUE if it succeeds; otherwise, it returns FALSE.</returns> [DllImport("hid.dll")] private static extern Boolean HidD_GetPreparsedData(IntPtr hidDeviceObject, out IntPtr PreparsedData); [DllImport("hid.dll")] private static extern Boolean HidD_FreePreparsedData(IntPtr PreparsedData); [DllImport("hid.dll")] private static extern uint HidP_GetCaps(IntPtr PreparsedData, out HIDP_CAPS Capabilities); /// <summary> /// This function creates, opens, or truncates a file, COM port, device, service, or console. /// </summary> /// <param name="fileName">a null-terminated string that specifies the name of the object</param> /// <param name="desiredAccess">Type of access to the object</param> /// <param name="shareMode">Share mode for object</param> /// <param name="securityAttributes">Ignored; set to NULL</param> /// <param name="creationDisposition">Action to take on files that exist, and which action to take when files do not exist</param> /// <param name="flagsAndAttributes">File attributes and flags for the file</param> /// <param name="templateFile">Ignored</param> /// <returns>An open handle to the specified file indicates success</returns> [DllImport("kernel32.dll", SetLastError = true)] private static extern IntPtr CreateFile(string fileName, uint desiredAccess, uint shareMode, uint securityAttributes, uint creationDisposition, uint flagsAndAttributes, uint templateFile); /// <summary> /// This function closes an open object handle. /// </summary> /// <param name="hObject">Handle to an open object</param> /// <returns></returns> [DllImport("kernel32.dll")] private static extern int CloseHandle(IntPtr hObject); /// <summary> /// This function reads data from a file, starting at the position indicated by the file pointer. /// </summary> /// <param name="file">Handle to the file to be read</param> /// <param name="buffer">Pointer to the buffer that receives the data read from the file </param> /// <param name="numberOfBytesToRead">Number of bytes to be read from the file</param> /// <param name="numberOfBytesRead">Pointer to the number of bytes read</param> /// <param name="lpOverlapped">Unsupported; set to NULL</param> /// <returns></returns> [DllImport("Kernel32.dll", SetLastError = true)] private static extern bool ReadFile(IntPtr file, byte[] buffer, uint numberOfBytesToRead, out uint numberOfBytesRead, IntPtr lpOverlapped); /// <summary> /// This function writes data to a file /// </summary> /// <param name="file">Handle to the file to be written to</param> /// <param name="buffer">Pointer to the buffer containing the data to write to the file</param> /// <param name="numberOfBytesToWrite">Number of bytes to write to the file</param> /// <param name="numberOfBytesWritten">Pointer to the number of bytes written by this function call</param> /// <param name="lpOverlapped">Unsupported; set to NULL</param> /// <returns></returns> [DllImport("Kernel32.dll", SetLastError = true)] private static extern bool WriteFile(IntPtr file, byte[] buffer, uint numberOfBytesToWrite, out uint numberOfBytesWritten, IntPtr lpOverlapped); /// <summary> /// Registers the device or type of device for which a window will receive notifications /// </summary> /// <param name="recipient">A handle to the window or service that will receive device events for the devices specified in the NotificationFilter parameter</param> /// <param name="notificationFilter">A pointer to a block of data that specifies the type of device for which notifications should be sent</param> /// <param name="flags">A Flags that specify the handle type</param> /// <returns>If the function succeeds, the return value is a device notification handle</returns> [DllImport("User32.dll", SetLastError = true)] private static extern IntPtr RegisterDeviceNotification(IntPtr recipient, IntPtr notificationFilter, int flags); /// <summary> /// Closes the specified device notification handle. /// </summary> /// <param name="handle">Device notification handle returned by the RegisterDeviceNotification function</param> /// <returns></returns> [DllImport("user32.dll", SetLastError = true)] private static extern bool UnregisterDeviceNotification(IntPtr handle); } #region /// <summary> /// SP_DEVICE_INTERFACE_DATA structure defines a device interface in a device information set. /// </summary> public struct SP_DEVICE_INTERFACE_DATA { public int cbSize; public Guid interfaceClassGuid; public int flags; public int reserved; } /// <summary> /// SP_DEVICE_INTERFACE_DETAIL_DATA structure contains the path for a device interface. /// </summary> [StructLayout(LayoutKind.Sequential, Pack = 2)] internal struct SP_DEVICE_INTERFACE_DETAIL_DATA { internal int cbSize; internal short devicePath; } /// <summary> /// SP_DEVINFO_DATA structure defines a device instance that is a member of a device information set. /// </summary> [StructLayout(LayoutKind.Sequential)] public class SP_DEVINFO_DATA { public int cbSize = Marshal.SizeOf(typeof(SP_DEVINFO_DATA)); public Guid classGuid = Guid.Empty; // temp public int devInst = 0; // dumy public int reserved = 0; } /// <summary> /// Flags controlling what is included in the device information set built by SetupDiGetClassDevs /// </summary> public enum DIGCF { DIGCF_DEFAULT = 0x00000001, // only valid with DIGCF_DEVICEINTERFACE DIGCF_PRESENT = 0x00000002, DIGCF_ALLCLASSES = 0x00000004, DIGCF_PROFILE = 0x00000008, DIGCF_DEVICEINTERFACE = 0x00000010 } /// <summary> /// The HIDD_ATTRIBUTES structure contains vendor information about a HIDClass device /// </summary> public struct HIDD_ATTRIBUTES { public int Size; public ushort VendorID; public ushort ProductID; public ushort VersionNumber; } public struct HIDP_CAPS { public ushort Usage; public ushort UsagePage; public ushort InputReportByteLength; public ushort OutputReportByteLength; [MarshalAs(UnmanagedType.ByValArray, SizeConst = 17)] public ushort[] Reserved; public ushort NumberLinkCollectionNodes; public ushort NumberInputButtonCaps; public ushort NumberInputValueCaps; public ushort NumberInputDataIndices; public ushort NumberOutputButtonCaps; public ushort NumberOutputValueCaps; public ushort NumberOutputDataIndices; public ushort NumberFeatureButtonCaps; public ushort NumberFeatureValueCaps; public ushort NumberFeatureDataIndices; } /// <summary> /// Type of access to the object. ///</summary> static class DESIREDACCESS { public const uint GENERIC_READ = 0x80000000; public const uint GENERIC_WRITE = 0x40000000; public const uint GENERIC_EXECUTE = 0x20000000; public const uint GENERIC_ALL = 0x10000000; } /// <summary> /// Action to take on files that exist, and which action to take when files do not exist. /// </summary> static class CREATIONDISPOSITION { public const uint CREATE_NEW = 1; public const uint CREATE_ALWAYS = 2; public const uint OPEN_EXISTING = 3; public const uint OPEN_ALWAYS = 4; public const uint TRUNCATE_EXISTING = 5; } /// <summary> /// File attributes and flags for the file. /// </summary> static class FLAGSANDATTRIBUTES { public const uint FILE_FLAG_WRITE_THROUGH = 0x80000000; public const uint FILE_FLAG_OVERLAPPED = 0x40000000; public const uint FILE_FLAG_NO_BUFFERING = 0x20000000; public const uint FILE_FLAG_RANDOM_ACCESS = 0x10000000; public const uint FILE_FLAG_SEQUENTIAL_SCAN = 0x08000000; public const uint FILE_FLAG_DELETE_ON_CLOSE = 0x04000000; public const uint FILE_FLAG_BACKUP_SEMANTICS = 0x02000000; public const uint FILE_FLAG_POSIX_SEMANTICS = 0x01000000; public const uint FILE_FLAG_OPEN_REPARSE_POINT = 0x00200000; public const uint FILE_FLAG_OPEN_NO_RECALL = 0x00100000; public const uint FILE_FLAG_FIRST_PIPE_INSTANCE = 0x00080000; } /// <summary> /// Serves as a standard header for information related to a device event reported through the WM_DEVICECHANGE message. /// </summary> [StructLayout(LayoutKind.Sequential)] public struct DEV_BROADCAST_HDR { public int dbcc_size; public int dbcc_devicetype; public int dbcc_reserved; } /// <summary> /// Contains information about a class of devices /// </summary> [StructLayout(LayoutKind.Sequential, CharSet = CharSet.Ansi)] public struct DEV_BROADCAST_DEVICEINTERFACE { public int dbcc_size; public int dbcc_devicetype; public int dbcc_reserved; public Guid dbcc_classguid; [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 255)] public string dbcc_name; } #endregion }
HIDInterface.cs
using System; using System.Collections; using System.Collections.Generic; using System.ComponentModel; using System.IO; using System.Text; using System.Threading; using System.Windows.Forms; namespace HID_SIMPLE.HID { public class HIDInterface : IDisposable { public enum MessagesType { Message, Error } public struct ReusltString { public bool Result; public string message; } public struct HidDevice { public UInt16 vID; public UInt16 pID; public string serial; } HidDevice lowHidDevice = new HidDevice(); public delegate void DelegateDataReceived(object sender, byte[] data); public DelegateDataReceived DataReceived; public delegate void DelegateStatusConnected(object sender, bool isConnect); public DelegateStatusConnected StatusConnected; public bool bConnected = false; public Hid oSp = new Hid(); private static HIDInterface m_oInstance; public struct TagInfo { public string AntennaPort; public string EPC; } public HIDInterface() { m_oInstance = this; oSp.DataReceived = HidDataReceived; oSp.DeviceRemoved = HidDeviceRemoved; } protected virtual void RaiseEventConnectedState(bool isConnect) { if (null != StatusConnected) StatusConnected(this, isConnect); } protected virtual void RaiseEventDataReceived(byte[] buf) { if(null != DataReceived) DataReceived(this, buf); } public void AutoConnect(HidDevice hidDevice) { lowHidDevice = hidDevice; ContinueConnectFlag = true; ReadWriteThread.DoWork += ReadWriteThread_DoWork; ReadWriteThread.WorkerSupportsCancellation = true; ReadWriteThread.RunWorkerAsync(); //Recommend performing USB read/write operations in a separate thread. Otherwise, } public void StopAutoConnect() { try { ContinueConnectFlag = false; Dispose(); } catch { } } ~HIDInterface() { Dispose(); } public bool Connect(HidDevice hidDevice) { ReusltString result = new ReusltString(); Hid.HID_RETURN hdrtn = oSp.OpenDevice(hidDevice.vID, hidDevice.pID, hidDevice.serial); if (hdrtn == Hid.HID_RETURN.SUCCESS) { bConnected = true; #region 消息通知 result.Result = true; result.message = "Connect Success!"; RaiseEventConnectedState(result.Result); #endregion return true; } bConnected = false; #region 消息通知 result.Result = false; result.message = "Device Connect Error"; RaiseEventConnectedState(result.Result); #endregion return false; } public bool Send(byte[] byData) { byte[] sendtemp = new byte[byData.Length + 1]; sendtemp[0] = (byte)byData.Length; Array.Copy(byData, 0, sendtemp, 1, byData.Length); Hid.HID_RETURN hdrtn = oSp.Write(new report(0, sendtemp)); if (hdrtn != Hid.HID_RETURN.SUCCESS) { return false; } return true; } public bool Send(string strData) { //获得报文的编码字节 byte[] data = Encoding.Unicode.GetBytes(strData); return Send(data); } public void DisConnect() { bConnected = false; Thread.Sleep(200); if (oSp != null) { oSp.CloseDevice(); } } void HidDeviceRemoved(object sender, EventArgs e) { bConnected = false; #region 消息通知 ReusltString result = new ReusltString(); result.Result = false; result.message = "Device Remove"; RaiseEventConnectedState(result.Result); #endregion if (oSp != null) { oSp.CloseDevice(); } } public void HidDataReceived(object sender, report e) { try { //第一个字节为数据长度，因为Device 的HID数据固定长度为64字节，取有效数据 byte[] buf = new byte[e.reportBuff[0]]; Array.Copy(e.reportBuff, 1, buf, 0, e.reportBuff[0]); //推送数据 RaiseEventDataReceived(buf); } catch { #region 消息通知 ReusltString result = new ReusltString(); result.Result = false; result.message = "Receive Error"; RaiseEventConnectedState(result.Result); #endregion } } public void Dispose() { try { this.DisConnect(); oSp.DataReceived -= HidDataReceived; oSp.DeviceRemoved -= HidDeviceRemoved; ReadWriteThread.DoWork -= ReadWriteThread_DoWork; ReadWriteThread.CancelAsync(); ReadWriteThread.Dispose(); } catch { } } Boolean ContinueConnectFlag = true; private BackgroundWorker ReadWriteThread = new BackgroundWorker(); private void ReadWriteThread_DoWork(object sender, DoWorkEventArgs e) { while (ContinueConnectFlag) { try { if (!bConnected) { Connect(lowHidDevice); } Thread.Sleep(500); } catch { } } } } }
调用如下：
#region parameter Define HIDInterface hid = new HIDInterface(); struct connectStatusStruct { public bool preStatus; public bool curStatus; } connectStatusStruct connectStatus = new connectStatusStruct(); //推送连接状态信息 public delegate void isConnectedDelegate(bool isConnected); public isConnectedDelegate isConnectedFunc; //推送接收数据信息 public delegate void PushReceiveDataDele(byte[] datas); public PushReceiveDataDele pushReceiveData; #endregion //第一步需要初始化，传入vid、pid，并开启自动连接 public void Initial() { hid.StatusConnected = StatusConnected; hid.DataReceived = DataReceived; HIDInterface.HidDevice hidDevice = new HIDInterface.HidDevice(); hidDevice.vID =0x04D8; hidDevice.pID = 0x003F; hidDevice.serial = ""; hid.AutoConnect(hidDevice); } //不使用则关闭 public void Close() { hid.StopAutoConnect(); } //发送数据 public bool SendBytes(byte[] data) { return hid.Send(data); } //接受到数据 public void DataReceived(object sender, byte[] e) { if (pushReceiveData != null) pushReceiveData(e); } //状态改变接收 public void StatusConnected(object sender, bool isConnect) { connectStatus.curStatus = isConnect; if (connectStatus.curStatus == connectStatus.preStatus) //connect return; connectStatus.preStatus = connectStatus.curStatus; if(connectStatus.curStatus) { isConnectedFunc(true); //ReportMessage(MessagesType.Message, "连接成功"); } else //disconnect { isConnectedFunc(false); //ReportMessage(MessagesType.Error, "无法连接"); } }
源码下载：
https://github.com/mikeobrien/HidLibrary
