|
public GetDescriptor ( byte descriptorType, byte index, short langId, |
||
| descriptorType | byte | The descriptor type ID to retrieve; this is usually one of the |
| index | byte | Descriptor index. |
| langId | short | Descriptor language id. |
| buffer | Memory to store the returned descriptor in. | |
| bufferLength | int | Length of the buffer parameter in bytes. |
| transferLength | int | The number of bytes transferred to buffer upon success. |
| 리턴 | bool | |
internal static List <UsbConfigInfo> GetDeviceConfigs(UsbDevice usbDevice)
{
List <UsbConfigInfo> rtnConfigs = new List <UsbConfigInfo>();
byte[] cfgBuffer = new byte[UsbConstants.MAX_CONFIG_SIZE];
int iConfigs = usbDevice.Info.Descriptor.ConfigurationCount;
for (int iConfig = 0; iConfig < iConfigs; iConfig++)
{
int iBytesTransmitted;
bool bSuccess = usbDevice.GetDescriptor((byte)DescriptorType.Configuration, 0, 0, cfgBuffer, cfgBuffer.Length, out iBytesTransmitted);
if (bSuccess)
{
if (iBytesTransmitted >= UsbConfigDescriptor.Size && cfgBuffer[1] == (byte)DescriptorType.Configuration)
{
UsbConfigDescriptor configDescriptor = new UsbConfigDescriptor();
Helper.BytesToObject(cfgBuffer, 0, Math.Min(UsbConfigDescriptor.Size, cfgBuffer[0]), configDescriptor);
if (configDescriptor.TotalLength == iBytesTransmitted)
{
List <byte[]> rawDescriptorList = new List <byte[]>();
int iRawLengthPosition = configDescriptor.Length;
while (iRawLengthPosition < configDescriptor.TotalLength)
{
byte[] rawDescriptor = new byte[cfgBuffer[iRawLengthPosition]];
if (iRawLengthPosition + rawDescriptor.Length > iBytesTransmitted)
{
throw new UsbException(usbDevice, "Descriptor length is out of range.");
}
Array.Copy(cfgBuffer, iRawLengthPosition, rawDescriptor, 0, rawDescriptor.Length);
rawDescriptorList.Add(rawDescriptor);
iRawLengthPosition += rawDescriptor.Length;
}
rtnConfigs.Add(new UsbConfigInfo(usbDevice, configDescriptor, ref rawDescriptorList));
}
else
{
UsbError.Error(ErrorCode.InvalidConfig,
0,
"GetDeviceConfigs: USB config descriptor length doesn't match the length received.",
usbDevice);
}
}
else
{
UsbError.Error(ErrorCode.InvalidConfig, 0, "GetDeviceConfigs: USB config descriptor is invalid.", usbDevice);
}
}
else
{
UsbError.Error(ErrorCode.InvalidConfig, 0, "GetDeviceConfigs", usbDevice);
}
}
return(rtnConfigs);
}
internal static List<UsbConfigInfo> GetDeviceConfigs(UsbDevice usbDevice)
{
List<UsbConfigInfo> rtnConfigs = new List<UsbConfigInfo>();
byte[] cfgBuffer = new byte[UsbConstants.MAX_CONFIG_SIZE];
int iConfigs = usbDevice.Info.Descriptor.ConfigurationCount;
for (int iConfig = 0; iConfig < iConfigs; iConfig++)
{
int iBytesTransmitted;
bool bSuccess = usbDevice.GetDescriptor((byte) DescriptorType.Configuration, 0, 0, cfgBuffer, cfgBuffer.Length, out iBytesTransmitted);
if (bSuccess)
{
if (iBytesTransmitted >= UsbConfigDescriptor.Size && cfgBuffer[1] == (byte) DescriptorType.Configuration)
{
UsbConfigDescriptor configDescriptor = new UsbConfigDescriptor();
Helper.BytesToObject(cfgBuffer, 0, Math.Min(UsbConfigDescriptor.Size, cfgBuffer[0]), configDescriptor);
if (configDescriptor.TotalLength == iBytesTransmitted)
{
List<byte[]> rawDescriptorList = new List<byte[]>();
int iRawLengthPosition = configDescriptor.Length;
while (iRawLengthPosition < configDescriptor.TotalLength)
{
byte[] rawDescriptor = new byte[cfgBuffer[iRawLengthPosition]];
if (iRawLengthPosition + rawDescriptor.Length > iBytesTransmitted)
throw new UsbException(usbDevice, "Descriptor length is out of range.");
Array.Copy(cfgBuffer, iRawLengthPosition, rawDescriptor, 0, rawDescriptor.Length);
rawDescriptorList.Add(rawDescriptor);
iRawLengthPosition += rawDescriptor.Length;
}
rtnConfigs.Add(new UsbConfigInfo(usbDevice, configDescriptor, ref rawDescriptorList));
}
else
UsbError.Error(ErrorCode.InvalidConfig,
0,
"GetDeviceConfigs: USB config descriptor length doesn't match the length received.",
usbDevice);
}
else
UsbError.Error(ErrorCode.InvalidConfig, 0, "GetDeviceConfigs: USB config descriptor is invalid.", usbDevice);
}
else
UsbError.Error(ErrorCode.InvalidConfig, 0, "GetDeviceConfigs", usbDevice);
}
return rtnConfigs;
}