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Oops - Bootloader optimizations to GetDescriptor() don't work, as the Configuration Descriptor's header does not contain the full length of the descriptor, breaking full enumeration.

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This commit is contained in:
Dean Camera 2011-03-18 04:58:39 +00:00
parent f6f4ac588c
commit c7f4752d6b
4 changed files with 50 additions and 23 deletions
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26
Bootloaders/HID/Descriptors.c
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@ -154,23 +154,33 @@ uint16_t CALLBACK_USB_GetDescriptor(const uint16_t wValue,
const uint8_t wIndex,
const void** const DescriptorAddress)
{
const uint8_t DescriptorType = (wValue >> 8);
const uint8_t DescriptorType = (wValue >> 8);
const void* Address = NULL;
uint16_t Size = NO_DESCRIPTOR;
/* If/Else If chain compiles slightly smaller than a switch case */
if (DescriptorType == DTYPE_Device)
Address = &DeviceDescriptor;
{
Address = &DeviceDescriptor;
Size = sizeof(USB_Descriptor_Device_t);
}
else if (DescriptorType == DTYPE_Configuration)
Address = &ConfigurationDescriptor;
{
Address = &ConfigurationDescriptor;
Size = sizeof(USB_Descriptor_Configuration_t);
}
else if (DescriptorType == HID_DTYPE_HID)
Address = &ConfigurationDescriptor.HID_VendorHID;
{
Address = &ConfigurationDescriptor.HID_VendorHID;
Size = sizeof(USB_HID_Descriptor_HID_t);
}
else
Address = &HIDReport;
{
Address = &HIDReport;
Size = sizeof(HIDReport);
}
if (Address != NULL)
Size = (Address == &HIDReport) ? sizeof(HIDReport) : ((USB_Descriptor_Header_t*)Address)->Size;
*DescriptorAddress = Address;
return Size;
}