/// <summary>
/// Open a new instance of a USB device using the finder criteria. (Innocuous if device instance already exists).
/// This will also enable the Transmit button as well as setup the asynchronous reader and event.
/// </summary>
void OpenUsbDevice()
{
if (m_usbDevice != null)
{
return;
}
m_usbDevice = LibUsbDotNet.UsbDevice.OpenUsbDevice(m_usbFinder);
if (m_usbDevice == null)
{
Log("No device found with VID={0:X4} PID={1:X4}", m_usbFinder.Vid, m_usbFinder.Pid);
return;
}
transmitButton.Enabled = true;
m_usbReader = m_usbDevice.OpenEndpointReader(LibUsbDotNet.Main.ReadEndpointID.Ep01);
m_usbReader.DataReceived += new EventHandler <LibUsbDotNet.Main.EndpointDataEventArgs>(UsbReader_DataReceived);
m_usbReader.DataReceivedEnabled = true;
// UsbRegistryInfo is null in Linux, so only include it if defined.
//
string sSymbolicInfo = m_usbDevice.UsbRegistryInfo == null ? string.Empty :
string.Format(" ({0})", m_usbDevice.UsbRegistryInfo.SymbolicName);
Log("Opened device VID={0:X4} PID={1:X4}{2}.",
m_usbDevice.Info.Descriptor.VendorID, m_usbDevice.Info.Descriptor.ProductID, sSymbolicInfo);
}
public UsbInterface(
LibUsbDotNet.UsbDevice usbDevice,
byte interfaceId,
ushort?readBufferSize = null,
ushort?writeBufferSize = null,
ILogger logger = null,
int timeout = 1000,
Func <LibUsbDotNet.UsbDevice, SetupPacket, byte[], int?, Task <TransferResult> > performControlTransferAsync = null)
: base(
performControlTransferAsync != null ?
//A func was passed in
new PerformControlTransferAsync((sb, data, c) => performControlTransferAsync(usbDevice, sb, data, timeout)) :
//Use the default
new PerformControlTransferAsync((sb, data, c) => PerformControlTransferLibUsbAsync(usbDevice, sb, data, c)),
logger, readBufferSize, writeBufferSize)
{
_usbDevice = usbDevice ?? throw new ArgumentNullException(nameof(usbDevice));
Timeout = timeout;
_interfaceId = interfaceId;
}
/// <summary>
/// Gracefully dispose and close the USB device and the related reader.
/// </summary>
void CloseUsbDevice()
{
transmitButton.Enabled = false;
if (m_usbReader != null)
{
m_usbReader.Abort();
m_usbReader.Dispose();
m_usbReader = null;
}
if (null == m_usbDevice)
{
return;
}
m_usbDevice.Close();
m_usbDevice = null;
Log("Closed device.");
}
