X-Git-Url: http://git.linex4red.de/pub/USBasp.git/blobdiff_plain/071e02c6b6b4837fa9cf0b6d4c749994e02638d7..a8871c7fba73307226bd13e2cad4c840c850e6f1:/Demos/Host/LowLevel/KeyboardHost/ConfigDescriptor.c?ds=sidebyside

diff --git a/Demos/Host/LowLevel/KeyboardHost/ConfigDescriptor.c b/Demos/Host/LowLevel/KeyboardHost/ConfigDescriptor.c
index 0be2de18d..e1e32ed7c 100644
--- a/Demos/Host/LowLevel/KeyboardHost/ConfigDescriptor.c
+++ b/Demos/Host/LowLevel/KeyboardHost/ConfigDescriptor.c
@@ -50,6 +50,9 @@ uint8_t ProcessConfigurationDescriptor(void)
 	uint8_t  ConfigDescriptorData[512];
 	void*    CurrConfigLocation = ConfigDescriptorData;
 	uint16_t CurrConfigBytesRem;
+	
+	USB_Descriptor_Interface_t* HIDInterface   = NULL;
+	USB_Descriptor_Endpoint_t*  DataINEndpoint = NULL;
 
 	/* Retrieve the entire configuration descriptor into the allocated buffer */
 	switch (USB_Host_GetDeviceConfigDescriptor(1, &CurrConfigBytesRem, ConfigDescriptorData, sizeof(ConfigDescriptorData)))
@@ -64,28 +67,40 @@ uint8_t ProcessConfigurationDescriptor(void)
 			return ControlError;
 	}
 	
-	/* Get the keyboard interface from the configuration descriptor */
-	if (USB_GetNextDescriptorComp(&CurrConfigBytesRem, &CurrConfigLocation,
-	                              DComp_NextKeyboardInterface) != DESCRIPTOR_SEARCH_COMP_Found)
+	while (!(DataINEndpoint))
 	{
-		/* Descriptor not found, error out */
-		return NoHIDInterfaceFound;
-	}
+		/* See if we've found a likely compatible interface, and if there is an endpoint within that interface */
+		if (!(HIDInterface) ||
+		    USB_GetNextDescriptorComp(&CurrConfigBytesRem, &CurrConfigLocation,
+		                              DComp_NextKeyboardInterfaceDataEndpoint) != DESCRIPTOR_SEARCH_COMP_Found)
+		{
+			/* Get the next HID interface from the configuration descriptor */
+			if (USB_GetNextDescriptorComp(&CurrConfigBytesRem, &CurrConfigLocation,
+										  DComp_NextKeyboardInterface) != DESCRIPTOR_SEARCH_COMP_Found)
+			{
+				/* Descriptor not found, error out */
+				return NoCompatibleInterfaceFound;
+			}
 
-	/* Get the keyboard interface's data endpoint descriptor */
-	if (USB_GetNextDescriptorComp(&CurrConfigBytesRem, &CurrConfigLocation,
-	                              DComp_NextKeyboardInterfaceDataEndpoint) != DESCRIPTOR_SEARCH_COMP_Found)
-	{
-		/* Descriptor not found, error out */
-		return NoEndpointFound;
+			/* Save the interface in case we need to refer back to it later */
+			HIDInterface = DESCRIPTOR_PCAST(CurrConfigLocation, USB_Descriptor_Interface_t);
+
+			/* Skip the remainder of the loop as we have not found an endpoint yet */
+			continue;
+		}
+		
+		/* Retrieve the endpoint address from the endpoint descriptor */
+		USB_Descriptor_Endpoint_t* EndpointData = DESCRIPTOR_PCAST(CurrConfigLocation, USB_Descriptor_Endpoint_t);
+
+		/* If the endpoint is a IN type endpoint */
+		if (EndpointData->EndpointAddress & ENDPOINT_DESCRIPTOR_DIR_IN)
+		  DataINEndpoint = EndpointData;
 	}
 	
-	/* Retrieve the endpoint address from the endpoint descriptor */
-	USB_Descriptor_Endpoint_t* EndpointData = DESCRIPTOR_PCAST(CurrConfigLocation, USB_Descriptor_Endpoint_t);
-
-	/* Configure the keyboard data pipe */
-	Pipe_ConfigurePipe(KEYBOARD_DATAPIPE, EP_TYPE_INTERRUPT, PIPE_TOKEN_IN,
-	                   EndpointData->EndpointAddress, EndpointData->EndpointSize, PIPE_BANK_SINGLE);
+	/* Configure the HID data IN pipe */
+	Pipe_ConfigurePipe(KEYBOARD_DATA_IN_PIPE, EP_TYPE_INTERRUPT, PIPE_TOKEN_IN,
+	                   DataINEndpoint->EndpointAddress, DataINEndpoint->EndpointSize, PIPE_BANK_SINGLE);
+	Pipe_SetInterruptPeriod(DataINEndpoint->PollingIntervalMS);
 
 	/* Valid data found, return success */
 	return SuccessfulConfigRead;