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@ -51,7 +51,9 @@ uint8_t ProcessConfigurationDescriptor(void)
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void* CurrConfigLocation = ConfigDescriptorData;
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uint16_t CurrConfigBytesRem;
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USB_Descriptor_Endpoint_t* DataINEndpoint = NULL;
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USB_Descriptor_Interface_t* HIDInterface = NULL;
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USB_Descriptor_HID_t* HIDDescriptor = NULL;
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USB_Descriptor_Endpoint_t* DataINEndpoint = NULL;
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/* Retrieve the entire configuration descriptor into the allocated buffer */
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switch (USB_Host_GetDeviceConfigDescriptor(1, &CurrConfigBytesRem, ConfigDescriptorData, sizeof(ConfigDescriptorData)))
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@ -65,30 +67,12 @@ uint8_t ProcessConfigurationDescriptor(void)
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default:
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return ControlError;
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}
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/* Get the first HID interface from the configuration descriptor */
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if (USB_GetNextDescriptorComp(&CurrConfigBytesRem, &CurrConfigLocation,
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DComp_NextKeyboardInterface) != DESCRIPTOR_SEARCH_COMP_Found)
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{
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/* Descriptor not found, error out */
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return NoCompatibleInterfaceFound;
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}
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/* Get the HID descriptor from the configuration descriptor */
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if (USB_GetNextDescriptorComp(&CurrConfigBytesRem, &CurrConfigLocation,
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DComp_NextHID) != DESCRIPTOR_SEARCH_COMP_Found)
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{
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/* Descriptor not found, error out */
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return NoCompatibleInterfaceFound;
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}
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/* Save the HID report size for later use */
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HIDReportSize = DESCRIPTOR_PCAST(CurrConfigLocation, USB_Descriptor_HID_t)->HIDReportLength;
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while (!(DataINEndpoint))
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{
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/* Get the next HID interface's data endpoint descriptor */
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if (USB_GetNextDescriptorComp(&CurrConfigBytesRem, &CurrConfigLocation,
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/* See if we've found a likely compatible interface, and if there is an endpoint within that interface */
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if (!(HIDInterface) ||
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USB_GetNextDescriptorComp(&CurrConfigBytesRem, &CurrConfigLocation,
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DComp_NextKeyboardInterfaceDataEndpoint) != DESCRIPTOR_SEARCH_COMP_Found)
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{
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/* Get the next HID interface from the configuration descriptor */
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@ -99,6 +83,9 @@ uint8_t ProcessConfigurationDescriptor(void)
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return NoCompatibleInterfaceFound;
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}
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/* Save the interface in case we need to refer back to it later */
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HIDInterface = DESCRIPTOR_PCAST(CurrConfigLocation, USB_Descriptor_Interface_t);
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/* Get the HID descriptor from the configuration descriptor */
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if (USB_GetNextDescriptorComp(&CurrConfigBytesRem, &CurrConfigLocation,
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DComp_NextHID) != DESCRIPTOR_SEARCH_COMP_Found)
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@ -107,9 +94,9 @@ uint8_t ProcessConfigurationDescriptor(void)
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return NoCompatibleInterfaceFound;
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}
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/* Save the HID report size for later use */
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HIDReportSize = DESCRIPTOR_PCAST(CurrConfigLocation, USB_Descriptor_HID_t)->HIDReportLength;
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/* Save the HID descriptor for later use */
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HIDDescriptor = DESCRIPTOR_PCAST(CurrConfigLocation, USB_Descriptor_HID_t);
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/* Skip the remainder of the loop as we have not found an endpoint yet */
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continue;
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}
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@ -127,6 +114,9 @@ uint8_t ProcessConfigurationDescriptor(void)
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DataINEndpoint->EndpointAddress, DataINEndpoint->EndpointSize, PIPE_BANK_SINGLE);
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Pipe_SetInterruptPeriod(DataINEndpoint->PollingIntervalMS);
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/* Get the HID report size from the HID report descriptor */
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HIDReportSize = HIDDescriptor->HIDReportLength;
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/* Valid data found, return success */
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return SuccessfulConfigRead;
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}
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