vb上位机usb hid

USB HID（人机接口设备）是一种用于在计算机和外部设备之间进行通信的协议。在VB上位机中使用USB HID需要使用一些特定的API函数来与USB设备进行通信。以下是一些参考步骤：

1. 使用Windows API函数创建HID设备的句柄。
2. 使用设备句柄读取和写入数据。
3. 使用设备句柄关闭HID设备。

下面是一个简单的示例代码，可用于读取HID设备的数据：

Private Declare Function HidD_GetHidGuid Lib "hid.dll" (ByRef HidGuid As Byte) As Long
Private Declare Function HidD_GetPreparsedData Lib "hid.dll" (ByVal HidDeviceObject As Long, ByRef PreparsedData As Long) As Long
Private Declare Function HidP_GetCaps Lib "hid.dll" (ByVal PreparsedData As Long, ByRef Capabilities As HIDP_CAPS) As Long
Private Declare Function HidD_FreePreparsedData Lib "hid.dll" (ByRef PreparsedData As Long) As Long
Private Declare Function HidD_GetAttributes Lib "hid.dll" (ByVal HidDeviceObject As Long, ByRef Attributes As HIDD_ATTRIBUTES) As Long
Private Declare Function HidD_GetSerialNumberString Lib "hid.dll" (ByVal HidDeviceObject As Long, ByVal Buffer As String, ByVal BufferLength As Long) As Long
Private Declare Function HidD_GetManufacturerString Lib "hid.dll" (ByVal HidDeviceObject As Long, ByVal Buffer As String, ByVal BufferLength As Long) As Long
Private Declare Function HidD_GetProductString Lib "hid.dll" (ByVal HidDeviceObject As Long, ByVal Buffer As String, ByVal BufferLength As Long) As Long
Private Declare Function HidD_SetFeature Lib "hid.dll" (ByVal HidDeviceObject As Long, ByRef ReportBuffer As Byte, ByVal ReportBufferLength As Long) As Long
Private Declare Function HidD_GetFeature Lib "hid.dll" (ByVal HidDeviceObject As Long, ByRef ReportBuffer As Byte, ByVal ReportBufferLength As Long) As Long
Private Declare Function HidD_GetNumInputBuffers Lib "hid.dll" (ByVal HidDeviceObject As Long, ByRef NumberBuffers As Long) As Long
Private Declare Function HidD_SetNumInputBuffers Lib "hid.dll" (ByVal HidDeviceObject As Long, ByVal NumberBuffers As Long) As Long
Private Declare Function HidD_GetInputReport Lib "hid.dll" (ByVal HidDeviceObject As Long, ByRef ReportBuffer As Byte, ByVal ReportBufferLength As Long) As Long
Private Declare Function HidD_SetOutputReport Lib "hid.dll" (ByVal HidDeviceObject As Long, ByRef ReportBuffer As Byte, ByVal ReportBufferLength As Long) As Long
Private Declare Function HidD_GetIndexedString Lib "hid.dll" (ByVal HidDeviceObject As Long, ByVal StringIndex As Long, ByVal Buffer As String, ByVal BufferLength As Long) As Long

Private Const HIDP_STATUS_SUCCESS = &H0
Private Const HIDP_CAPS = &H14
Private Const HIDP_INPUT_REPORT = &H1
Private Const HIDP_OUTPUT_REPORT = &H2

Private Type HIDP_CAPS
    Usage As Integer
    UsagePage As Integer
    InputReportByteLength As Integer
    OutputReportByteLength As Integer
    FeatureReportByteLength As Integer
    Reserved(21) As Integer
    NumberLinkCollectionNodes As Integer
    NumberInputButtonCaps As Integer
    NumberInputValueCaps As Integer
    NumberInputDataIndices As Integer
    NumberOutputButtonCaps As Integer
    NumberOutputValueCaps As Integer
    NumberOutputDataIndices As Integer
    NumberFeatureButtonCaps As Integer
    NumberFeatureValueCaps As Integer
    NumberFeatureDataIndices As Integer
End Type

Private Type HIDD_ATTRIBUTES
    Size As Long
    VendorID As Integer
    ProductID As Integer
    VersionNumber As Integer
End Type

Private Sub ReadHIDDevice()
    Dim HidDeviceObject As Long
    Dim PreparsedData As Long
    Dim Capabilities As HIDP_CAPS
    Dim Attributes As HIDD_ATTRIBUTES
    Dim ReportBuffer(1023) As Byte
    Dim ReportBufferLength As Long
    Dim Result As Long
    
    '获取HID设备的GUID
    Dim HidGuid(15) As Byte
    Result = HidD_GetHidGuid(HidGuid(0))
    
    '打开HID设备的句柄
    HidDeviceObject = CreateFile("\\.\HID#VID_XXXX&PID_XXXX#7&XXXXXXX&0&0000#{XXXXXX-XXXX-XXXX-XXXX-XXXXXXXXXXXX}", GENERIC_READ Or GENERIC_WRITE, FILE_SHARE_READ Or FILE_SHARE_WRITE, 0, OPEN_EXISTING, 0, 0)
    
    '获取HID设备的属性
    Result = HidD_GetAttributes(HidDeviceObject, Attributes)
    
    '获取HID设备的预处理数据
    Result = HidD_GetPreparsedData(HidDeviceObject, PreparsedData)
    
    '获取HID设备的能力
    Result = HidP_GetCaps(PreparsedData, Capabilities)
    
    '读取输入报告
    ReportBufferLength = Capabilities.InputReportByteLength
    ReDim ReportBuffer(ReportBufferLength - 1)
    Result = HidD_GetInputReport(HidDeviceObject, ReportBuffer(0), ReportBufferLength)
    
    '关闭HID设备的句柄
    CloseHandle(HidDeviceObject)
End Sub

请注意，代码中的HID设备GUID、文件路径、VendorID和ProductID需要根据实际情况进行更改。