internal unsafe CyUSBConfig(IntPtr handle, byte[] DescrData, CyControlEndPoint ctlEndPt)
{
// This contructore is to initialize usb2.0 device
fixed (byte* buf = DescrData)
{
USB_CONFIGURATION_DESCRIPTOR* ConfigDescr = (USB_CONFIGURATION_DESCRIPTOR*)buf;
_bLength = ConfigDescr->bLength;
_bDescriptorType = ConfigDescr->bDescriptorType;
_wTotalLength = ConfigDescr->wTotalLength;
_bNumInterfaces = ConfigDescr->bNumInterfaces;
_AltInterfaces = 0;
_bConfigurationValue = ConfigDescr->bConfigurationValue;
_iConfiguration = ConfigDescr->iConfiguration;
_bmAttributes = ConfigDescr->bmAttributes;
_MaxPower = ConfigDescr->MaxPower;
int tLen = ConfigDescr->wTotalLength;
byte* desc = (byte*)(buf + ConfigDescr->bLength);
int bytesConsumed = ConfigDescr->bLength;
Interfaces = new CyUSBInterface[CyConst.MAX_INTERFACES];
int i = 0;
do
{
USB_INTERFACE_DESCRIPTOR* interfaceDesc = (USB_INTERFACE_DESCRIPTOR*)desc;
if (interfaceDesc->bDescriptorType == CyConst.USB_INTERFACE_DESCRIPTOR_TYPE)
{
Interfaces[i] = new CyUSBInterface(handle, desc, ctlEndPt);
i++;
_AltInterfaces++; // Actually the total number of interfaces for the config
bytesConsumed += Interfaces[i - 1].wTotalLength;
}
else
{
// Unexpected descriptor type
// Just skip it and go on - could have thrown an exception instead
// since this indicates that the descriptor structure is invalid.
bytesConsumed += interfaceDesc->bLength;
}
desc = (byte*)(buf + bytesConsumed);
} while ((bytesConsumed < tLen) && (i < CyConst.MAX_INTERFACES));
// Count the alt interfaces for each interface number
for (i = 0; i < _AltInterfaces; i++)
{
Interfaces[i]._bAltSettings = 0;
for (int j = 0; j < AltInterfaces; j++) // Walk the list looking for identical bInterfaceNumbers
if (Interfaces[i].bInterfaceNumber == Interfaces[j].bInterfaceNumber)
Interfaces[i]._bAltSettings++;
}
// Create the Interface Container (this is done only for Tree view purpose).
IntfcContainer = new CyUSBInterfaceContainer[bNumInterfaces];
Dictionary<int, bool> altDict = new Dictionary<int, bool>();
int intfcCount = 0;
for (i = 0; i < _AltInterfaces; i++)
{
if (altDict.ContainsKey(Interfaces[i].bInterfaceNumber) == false)
{
int altIntfcCount = 0;
IntfcContainer[intfcCount] = new CyUSBInterfaceContainer(Interfaces[i].bInterfaceNumber, Interfaces[i].bAltSettings);
for (int j = i; j < AltInterfaces; j++)
{
if (Interfaces[i].bInterfaceNumber == Interfaces[j].bInterfaceNumber)
{
IntfcContainer[intfcCount].Interfaces[altIntfcCount] = Interfaces[j];
altIntfcCount++;
}
}
intfcCount++;
altDict.Add(Interfaces[i].bInterfaceNumber, true);
}
}
} /* end of fixed loop */
}
