WriteFile返回错误代码87
本文关键字:错误代码 返回 WriteFile | 更新日期: 2023-09-27 18:23:53
我正在编写一个程序,该程序正在写入HID设备,并收到错误87,WriteFile函数上的无效参数。我从Jan Axelson的USB Complete中获得了这些功能,所以我不确定为什么会出现错误。我正在使用这个来查找我的设备:
private void USBInit()
{
IntPtr deviceInfoSet;
Int32 memberIndex = 0;
SP_DEVICE_INTERFACE_DATA MyDeviceInterfaceData = new SP_DEVICE_INTERFACE_DATA();
Int32 bufferSize = 0;
IntPtr detailDataBuffer;
Boolean success = false;
deviceFound = false;
HidD_GetHidGuid(ref hidGuid); // Get the GUID
deviceInfoSet = SetupDiGetClassDevs // Get pointer to a device info set
(ref hidGuid,
IntPtr.Zero,
IntPtr.Zero,
DIGCF_PRESENT | DIGCF_DEVICEINTERFACE);
do
{
MyDeviceInterfaceData.cbSize = Marshal.SizeOf(MyDeviceInterfaceData); // Identify Device Interface
success = SetupDiEnumDeviceInterfaces
(deviceInfoSet,
IntPtr.Zero,
ref hidGuid,
memberIndex,
ref MyDeviceInterfaceData);
success = SetupDiGetDeviceInterfaceDetail // Request Structure with Device Path Name
(deviceInfoSet,
ref MyDeviceInterfaceData,
IntPtr.Zero,
0,
ref bufferSize,
IntPtr.Zero);
detailDataBuffer = Marshal.AllocHGlobal(bufferSize);
Marshal.WriteInt32(detailDataBuffer, (IntPtr.Size == 4) ? (4 + Marshal.SystemDefaultCharSize) : 8);
success = SetupDiGetDeviceInterfaceDetail
(deviceInfoSet,
ref MyDeviceInterfaceData,
detailDataBuffer,
bufferSize,
ref bufferSize,
IntPtr.Zero);
IntPtr pDevicePathName = new IntPtr(detailDataBuffer.ToInt32() + 4);
devicePathName = Marshal.PtrToStringAuto(pDevicePathName);
Marshal.FreeHGlobal(detailDataBuffer);
/* Request Communications Handle */
deviceHandle = CreateFile
(devicePathName,
(GENERIC_WRITE | GENERIC_READ),
FILE_SHARE_READ | FILE_SHARE_WRITE,
IntPtr.Zero,
OPEN_EXISTING,
FILE_ATTRIBUTE_NORMAL | FILE_FLAG_OVERLAPPED,
0);
/* Get Vendor ID and Product ID */
DeviceAttributes.Size = Marshal.SizeOf(DeviceAttributes);
success = HidD_GetAttributes(deviceHandle, ref DeviceAttributes);
// Compare Vendor ID and Product ID.
if ((DeviceAttributes.VendorID == myVendorID) && (DeviceAttributes.ProductID == myProductID))
{
MessageBoxResult res = System.Windows.MessageBox.Show("Device Found", "K-IX", MessageBoxButton.OK);
deviceFound = true;
/* Get pointer to capabilities */
success = HidD_GetPreparsedData(deviceHandle, ref preparsedData);
/* Get Device Capabilities */
Int32 result = 0;
result = HidP_GetCaps(preparsedData, ref Capabilities);
return;
}
else
{
// Not my device
memberIndex++;
deviceHandle.Close();
if (memberIndex == 128)
{ break; }
}
} while (!deviceFound);
}
这是我用来尝试发送到设备的代码:
private void SendUSB()
{
Int32 numberOfBytesWritten = 0;
Byte[] outputReportBuffer = null;
Boolean success;
Boolean success2;
// Set size of the Output report buffer.
Array.Resize(ref outputReportBuffer, Capabilities.InputReportByteLength);
// Store Report ID in first byte of header.
outputReportBuffer[0] = 0;
// Store report data following the Report ID.
outputReportBuffer[1] = 0x01;
//outputReportBuffer[2] = 0x02;
// outputReportBuffer[3] = 0x03;
// Send Report
success = WriteFile
(deviceHandle,
outputReportBuffer,
outputReportBuffer.Length,
ref numberOfBytesWritten,
IntPtr.Zero);
if (!success)
{
Int32 lastError = Marshal.GetLastWin32Error();
}
success2 = HidD_FreePreparsedData(preparsedData);
}
我已经验证了我的设备报告长度为2,但不确定从这里开始该怎么办,因为USB和HID编程对我来说是新的。
您在CreateFile()调用中指定了FILE_FLAG_OVERLAPPED,但在WriteFile()函数中为lpOverlapped参数传递了null。这是不合法的。
删除FILE_FLAG_OVERLAPPED选项。