/// <summary>
/// Sends an Output report, then may retrieve an Input report.
/// </summary>
private byte[] ExchangeInputAndOutputReports(byte[] outputReportBuffer, bool doOutputReport, bool doInputReport, int expectedInputReportID, EventHandler <AsyncInputReportArgs> readCompleteHandler)
{
StringBuilder byteValue = null;
int count = 0;
byte[] inputReportBuffer = null;
bool success = false;
try
{
success = false;
// Don't attempt to exchange reports if valid handles aren't available
// (as for a mouse or keyboard under Windows 2000/XP.)
if (!readHandle.IsInvalid && !writeHandle.IsInvalid)
{
// Don't attempt to send an Output report if the HID has no Output report.
if (doOutputReport && MyHid.Capabilities.OutputReportByteLength > 0)
{
// Write a report.
if ((UseControlTransfersOnly) == true)
{
// Use a control transfer to send the report,
// even if the HID has an interrupt OUT endpoint.
Hid.OutputReportViaControlTransfer myOutputReport = new Hid.OutputReportViaControlTransfer();
success = myOutputReport.Write(outputReportBuffer, writeHandle);
}
else
{
// Use WriteFile to send the report.
// If the HID has an interrupt OUT endpoint, WriteFile uses an
// interrupt transfer to send the report.
// If not, WriteFile uses a control transfer.
Hid.OutputReportViaInterruptTransfer myOutputReport = new Hid.OutputReportViaInterruptTransfer();
success = myOutputReport.Write(outputReportBuffer, writeHandle);
}
if (success)
{
;
/*
* byteValue = new StringBuilder();
* byteValue.AppendFormat("An Output report has been written. Output Report ID: {0:X02}\r\n Output Report Data: ", outputReportBuffer[0]);
*
* for (count = 0; count <= outputReportBuffer.Length - 1; count++)
* {
* // Display bytes as 2-character hex strings.
* byteValue.AppendFormat("{0:X02} ", outputReportBuffer[count]);
* }
* Tracer.Trace(byteValue.ToString());
*/
}
else
{
Tracer.Error("The attempt to write an Output report has failed.");
}
}
else
{
//Tracer.Trace("No attempt to send an Output report was made.");
if (doOutputReport)
{
Tracer.Error("The HID doesn't have an Output report, but it was requested.");
}
}
// Read an Input report.
// Don't attempt to send an Input report if the HID has no Input report.
// (The HID spec requires all HIDs to have an interrupt IN endpoint,
// which suggests that all HIDs must support Input reports.)
if (doInputReport && MyHid.Capabilities.InputReportByteLength > 0)
{
success = false;
// Set the size of the Input report buffer.
inputReportBuffer = new byte[MyHid.Capabilities.InputReportByteLength];
if (UseControlTransfersOnly || readCompleteHandler == null)
{
// Read a report using a control transfer.
Hid.InputReportViaControlTransfer myInputReport = new Hid.InputReportViaControlTransfer();
// Read the report via HidD_GetInputReport http://www.osronline.com/DDKx/intinput/hidfunc_3hgy.htm
// - "If the top-level collection includes report IDs, the caller must set the first byte of the buffer to a nonzero report ID; otherwise the caller must set the first byte to zero."
inputReportBuffer[0] = (byte)expectedInputReportID;
myInputReport.Read(hidHandle, readHandle, writeHandle, ref myDeviceDetected, ref inputReportBuffer, ref success);
if (success)
{
;
/*
* byteValue = new StringBuilder();
* byteValue.AppendFormat("ExchangeInputAndOutputReports(): An Input report has been read via ControlTransfer. Input Report ID: {0:X02}\r\n Input Report Data: ", inputReportBuffer[0]);
*
* for (count = 0; count <= inputReportBuffer.Length - 1; count++)
* {
* // Display bytes as 2-character Hex strings.
* byteValue.AppendFormat("{0:X02} ", inputReportBuffer[count]);
* }
* Tracer.Trace(byteValue.ToString());
*/
}
else
{
Tracer.Error("ExchangeInputAndOutputReports(): The attempt to read an Input report has failed.");
}
}
else
{
// Read a report using interrupt transfers.
// To enable reading a report without blocking the main thread, this
// application uses an asynchronous delegate.
//Tracer.Trace("IP: Arranging asyncronous read via Interrupt Transfer");
IAsyncResult ar = null;
Hid.InputReportViaInterruptTransfer myInputReport = new Hid.InputReportViaInterruptTransfer();
if (readCompleteHandler != null)
{
myInputReport.HasReadData += readCompleteHandler;
}
// Define a delegate for the Read method of myInputReport.
ReadInputReportDelegate MyReadInputReportDelegate = new ReadInputReportDelegate(myInputReport.Read);
// The BeginInvoke method calls myInputReport.Read to attempt to read a report.
// The method has the same parameters as the Read function,
// plus two additional parameters:
// GetInputReportData is the callback procedure that executes when the Read function returns.
// MyReadInputReportDelegate is the asynchronous delegate object.
// The last parameter can optionally be an object passed to the callback.
ar = MyReadInputReportDelegate.BeginInvoke(hidHandle, readHandle, writeHandle, ref myDeviceDetected, ref inputReportBuffer, ref success, new AsyncCallback(GetInputReportData), MyReadInputReportDelegate);
}
}
else
{
//Tracer.Trace("No attempt to read an Input report was made.");
if (doInputReport)
{
Tracer.Error("The HID doesn't have an Input report, but it was requested.");
}
}
}
else
{
Tracer.Error("Invalid handle. The device is probably a system mouse or keyboard.");
Tracer.Error("No attempt to write an Output report or read an Input report was made.");
}
return(inputReportBuffer); // may still be null
}
catch (Exception ex)
{
Tracer.Error(ex);
throw;
}
}
public bool FillRxBuffer()
{
Byte[] inputReportBuffer = null;
Boolean success = false;
readBuffer.Clear();
this.readBuffer.Clear();
this.ReadFinished = false;
this.ReadStart = 0;
//Thread.Sleep(10);
/*
if (readHandle.IsClosed)
{
Console.Out.WriteLine("readHandle closed");
}
*/
if (!readHandle.IsClosed)
{
if (!readHandle.IsInvalid && MyHid.Capabilities.InputReportByteLength > 0)
//if (MyHid.Capabilities.InputReportByteLength > 0)
{
// Set the size of the Input report buffer.
inputReportBuffer = new Byte[MyHid.Capabilities.InputReportByteLength];
// Read a report using interrupt transfers.
// To enable reading a report without blocking the main thread, this
// application uses an asynchronous delegate.
IAsyncResult ar = null;
Hid.InputReportViaInterruptTransfer myInputReport = new Hid.InputReportViaInterruptTransfer();
// Define a delegate for the Read method of myInputReport.
ReadInputReportDelegate MyReadInputReportDelegate = new ReadInputReportDelegate(myInputReport.Read);
/*
if (readHandle.IsClosed)
{
Debug.WriteLine("readHandle Closed");
}
*/
// The BeginInvoke method calls myInputReport.Read to attempt to read a report.
// The method has the same parameters as the Read function,
// plus two additional parameters:
// GetInputReportData is the callback procedure that executes when the Read function returns.
// MyReadInputReportDelegate is the asynchronous delegate object.
// The last parameter can optionally be an object passed to the callback.
ar = MyReadInputReportDelegate.BeginInvoke(hidHandle, readHandle, writeHandle, ref myDeviceDetected, ref inputReportBuffer, ref success, new AsyncCallback(GetInputReportData), MyReadInputReportDelegate);
}
else
{
//Console.Out.WriteLine("No attempt to read an Input report was made.");
Debug.WriteLine("No attempt to read an Input report was made.");
//Console.Out.WriteLine("The HID doesn't have an Input report.");
Debug.WriteLine("The HID doesn't have an Input report.");
return false;
}
}
else
{
Debug.WriteLine("readHandle Closed");
return false;
}
//while (this.readBuffer.Count < 63)
//{
// Thread.Sleep(5);
//}
//ReadFinished = true;
return true;
}