/// <summary>
/// Open the device, as needed.
/// </summary>
public bool Open(bool readWrite = true)
{
// Open, but without read/write access?
if (IsOpen && readWrite && !IsOpenReadWrite)
{
Close();
}
if (!IsOpen)
{
Handle = HidNativeMethods.CreateFile(
Path,
readWrite ? HidNativeMethods.GENERIC_READ |
HidNativeMethods.GENERIC_WRITE
: 0,
HidNativeMethods.FILE_SHARE_READ |
HidNativeMethods.FILE_SHARE_WRITE,
IntPtr.Zero,
HidNativeMethods.OPEN_EXISTING,
0,
IntPtr.Zero);
IsOpenReadWrite = readWrite;
}
return(IsOpen);
}
/// <summary>
/// Close device, as needed.
/// </summary>
private void Close()
{
if (IsOpen)
{
HidNativeMethods.CloseHandle(Handle);
Handle = IntPtr.Zero;
IsOpenReadWrite = false;
}
}
/// <summary>
/// Write report data to the bootloader.
/// </summary>
private bool WriteInternal()
{
bool WriteDevice()
{
var written = Device.Open();
if (written)
{
uint bytesWritten = 0;
written = HidNativeMethods.WriteFile(Device.Handle,
Data,
Device.ReportLength,
ref bytesWritten,
IntPtr.Zero) &&
bytesWritten == Device.ReportLength;
}
if (written)
{
Thread.Sleep(10);
}
return(written);
}
#if DEBUG
var result = true;
if (this is HidUploadReport uploadReport &&
uploadReport.TestOutputStream != null)
{
try
{
uploadReport.TestOutputStream.Write(Data,
0,
Device.ReportLength);
}
catch
{
result = false;
}
}
/// <summary>
/// Constructoror must be given path to device.
/// </summary>
public HidDevice(string path)
{
if (string.IsNullOrWhiteSpace(path))
{
throw new TeensyException("The HID path must be specified.");
}
Path = path;
// Get Vendor and Product IDs.
if (Open(false))
{
var attributes = default(HidNativeMethods.HIDD_ATTRIBUTES);
attributes.Size = Marshal.SizeOf(attributes);
if (HidNativeMethods.HidD_GetAttributes(Handle, ref attributes))
{
// Only interested in Teensy bootloaders.
if (attributes.ProductID == Constants.BootloaderId &&
attributes.VendorID == Constants.VendorId)
{
var capabilities = default(HidNativeMethods.HIDP_CAPS);
var pointer = default(IntPtr);
if (HidNativeMethods.HidD_GetPreparsedData(Handle,
ref pointer))
{
if (HidNativeMethods.HidP_GetCaps(
pointer,
ref capabilities) ==
HidNativeMethods.HIDP_STATUS_SUCCESS)
{
HidNativeMethods.HidD_FreePreparsedData(pointer);
if (capabilities.OutputReportByteLength > 0)
{
ReportLength = (ushort)
capabilities.OutputReportByteLength;
switch (capabilities.Usage)
{
case 0x1B:
{
TeensyType = TeensyTypes.Teensy2;
break;
}
case 0x1C:
{
TeensyType =
TeensyTypes.Teensy2PlusPlus;
break;
}
case 0x1D:
{
TeensyType = TeensyTypes.Teensy30;
break;
}
case 0x1E:
{
TeensyType = TeensyTypes.Teensy31;
break;
}
case 0x20:
{
TeensyType = TeensyTypes.TeensyLc;
break;
}
case 0x21:
{
TeensyType = TeensyTypes.Teensy32;
break;
}
case 0x1F:
{
TeensyType = TeensyTypes.Teensy35;
break;
}
case 0x22:
{
TeensyType = TeensyTypes.Teensy36;
break;
}
case 0x24:
{
TeensyType = TeensyTypes.Teensy40;
break;
}
}
}
}
}
}
}
Close();
}
}
/// <summary>
/// Given a serial number, find the Teensy device that is running the
/// bootloader.
/// </summary>
internal static HidDevice FindDevice(uint serialNumber)
{
var list = HidNativeMethods.GetAllDevices(serialNumber);
return(list.Count > 0 ? list[0] : null);
}