STM32与VB下位机的USB通信

2012-12-27

STM32与VB上位机的USB通信在毕业设计中涉及USB通信的问题，结果周围的老师都没涉及这块，自己做的很吃力，不

STM32与VB上位机的USB通信
在毕业设计中涉及USB通信的问题，结果周围的老师都没涉及这块，自己做的很吃力，不知哪位大神可以提供我一个可以使用的USB通信的DLL，跪谢了QAQ
[最优解释]
读写数据可以用API函数：DeviceIoControl

Private Declare Function DeviceIoControl Lib "kernel32" (ByVal hDevice As Long, ByVal dwIoControlCode As Long, lpInBuffer As Any, ByVal nInBufferSize As Long, lpOutBuffer As Any, ByVal nOutBufferSize As Long, lpBytesReturned As Long, lpOverlapped As OVERLAPPED) As Long

你可以向这方面研究下

此外给你一本经典的USB编程书籍：http://download.csdn.net/detail/veron_04/1673828
[其他解释]
这是这个非常复杂的课题，先搞清楚USB协议，还要搞清楚IO控制，还要搞清楚驱动程序的编写

当然，你可以去寻找某些已经有现成接口的，直接访问接口吧
[其他解释]
我自己已经写过一个HID的模块，只能找到指定的USB设备，读取数据那块做不出来，我现在只是想尽快完成这个毕业设计。
[其他解释]

引用:

读写数据可以用API函数：DeviceIoControl

Private Declare Function DeviceIoControl Lib "kernel32" (ByVal hDevice As Long, ByVal dwIoControlCode As Long, lpInBuffer As Any, ByVal nInBufferSize As Long, lpOutBuff……

这个函数和我之前自己用到的WRITEFILE和READFILE函数有什么区别？其实我只要能接收来自STM32发送的数据4字节数据就行了
[其他解释]
http://download.csdn.net/detail/veron_04/4228319
[其他解释]
目前在windows平台上开发USB驱动程序的常用工具包有以下三种：

1、微软的DDK（或WDK）
2、DriverStudio
3、WinDriver

你可以百度一下。

[其他解释]
我做STM32的广告牌，也通信的，现在就是VB字模不会弄
[其他解释]
谁能写个类似VB版的BUS HOUND给我参考一下也行啊
[其他解释]
Private Sub ReadReport()

'Read data from the device.

Dim Count
Dim NumberOfBytesRead As Long

'Allocate a buffer for the report.
'Byte 0 is the report ID.

Dim ReadBuffer() As Byte
Dim UBoundReadBuffer As Integer

'******************************************************************************
'ReadFile
'Returns: the report in ReadBuffer.
'Requires: a device handle returned by CreateFile
'(for overlapped I/O, CreateFile must be called with FILE_FLAG_OVERLAPPED),
'the Input report length in bytes returned by HidP_GetCaps,
'and an overlapped structure whose hEvent member is set to an event object.
'******************************************************************************

Dim ByteValue As String

If MyDeviceDetected = False And DriveContion = False Then
      lstResults.AddItem "读出失败请先联接"
      Exit Sub
      End If



'The ReadBuffer array begins at 0, so subtract 1 from the number of bytes.

ReDim ReadBuffer(Capabilities.InputReportByteLength - 1)

'Scroll to the bottom of the list box.

lstResults.ListIndex = lstResults.ListCount - 1

'Do an overlapped ReadFile.
'The function returns immediately, even if the data hasn't been received yet.

Result = ReadFile _
    (ReadHandle, _
    ReadBuffer(0), _
    CLng(Capabilities.InputReportByteLength), _
    NumberOfBytesRead, _
    HIDOverlapped)
If Result <> 0 Then
Call DisplayResultOfAPICall("ReadFile")

lstResults.AddItem "waiting for ReadFile"

'Scroll to the bottom of the list box.

lstResults.ListIndex = lstResults.ListCount - 1
bAlertable = True

'******************************************************************************
'WaitForSingleObject
'Used with overlapped ReadFile.
'Returns when ReadFile has received the requested amount of data or on timeout.
'Requires an event object created with CreateEvent
'and a timeout value in milliseconds.
'******************************************************************************
Result = WaitForSingleObject _
    (EventObject, _
    100)
Call DisplayResultOfAPICall("WaitForSingleObject")

'Find out if ReadFile completed or timeout.

Select Case Result
    Case WAIT_OBJECT_0

        'ReadFile has completed

        lstResults.AddItem "ReadFile completed successfully."
    Case WAIT_TIMEOUT

        'Timeout

        lstResults.AddItem "Readfile timeout"

        'Cancel the operation

        '*************************************************************
        'CancelIo
        'Cancels the ReadFile
        'Requires the device handle.
        'Returns non-zero on success.
        '*************************************************************
        Result = CancelIo _
            (ReadHandle)
        lstResults.AddItem "************ReadFile timeout*************"
        lstResults.AddItem "CancelIO"
        Call DisplayResultOfAPICall("CancelIo")

        'The timeout may have been because the device was removed,

        'so close any open handles and
        'set MyDeviceDetected=False to cause the application to
        'look for the device on the next attempt.

        'CloseHandle (HIDHandle)
        'Call DisplayResultOfAPICall("CloseHandle (HIDHandle)")
        'CloseHandle (ReadHandle)
        'Call DisplayResultOfAPICall("CloseHandle (ReadHandle)")
        'MyDeviceDetected = False
    Case Else
        lstResults.AddItem "Readfile undefined error"
        MyDeviceDetected = False
End Select

lstResults.AddItem " Report ID: " & ReadBuffer(0)
lstResults.AddItem " Report Data:"

lstResults.AddItem ""
For Count = 1 To UBound(ReadBuffer)

    'Add a leading 0 to values 0 - Fh.

    If Len(Hex$(ReadBuffer(Count))) < 2 Then
        ByteValue = "0" & Hex$(ReadBuffer(Count))
    Else
        ByteValue = Hex$(ReadBuffer(Count))
    End If

    lstResults.AddItem " " & ByteValue

    'Display the received bytes in the text box.

    'TextIR.SelStart = Len(TextIR.Text)
    'TextIR.SelText = ByteValue & vbCrLf
    lstResults.AddItem "" & ByteValue

Next Count

'******************************************************************************
'ResetEvent
'Sets the event object in the overlapped structure to non-signaled.
'Requires a handle to the event object.
'Returns non-zero on success.
'******************************************************************************

'Call ResetEvent(EventObject)
'Call DisplayResultOfAPICall("ResetEvent")
End If
End Sub

我参考了大家给我推荐的资料，然后写了如上读取数据的函数，为何始终接收不到下位机发出的数据呢？

[其他解释]
我用BUS HOUND能检测到数据的，但是自己写的程序就是接收不到，哪位前辈指点一下啊

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