Reverted Endpoint/Pipe non-sequential configuration hack, placed restriction on the configuration order instead to ensure maximum reliability.

Altered all low level device and host mode demos to ensure that endpoints and pipes are configured in ascending order properly.

Rewrote all low level host mode demos' configuration descriptor parser code to ensure that pipes are enumerated in ascending order, and to ensure maximum compatibility with devices.

Incremented all device mode demo's device descriptor revision numbers to ensure that any descriptor changes are re-fetched on machines which have enumerated previous versions.

1 files changed, 46 insertions, 67 deletions

diff --git a/Demos/Host/LowLevel/RNDISEthernetHost/ConfigDescriptor.c b/Demos/Host/LowLevel/RNDISEthernetHost/ConfigDescriptor.c
index 97a38b4ac..0db576f72 100644
--- a/Demos/Host/LowLevel/RNDISEthernetHost/ConfigDescriptor.c
+++ b/Demos/Host/LowLevel/RNDISEthernetHost/ConfigDescriptor.c
@@ -50,7 +50,10 @@ uint8_t ProcessConfigurationDescriptor(void)
 	uint8_t  ConfigDescriptorData[512];
 	void*    CurrConfigLocation = ConfigDescriptorData;
 	uint16_t CurrConfigBytesRem;
-	uint8_t  FoundEndpoints = 0;
+	
+	USB_Descriptor_Endpoint_t* DataINEndpoint       = NULL;
+	USB_Descriptor_Endpoint_t* DataOUTEndpoint      = NULL;
+	USB_Descriptor_Endpoint_t* NotificationEndpoint = NULL;
 
 	/* Retrieve the entire configuration descriptor into the allocated buffer */
 	switch (USB_Host_GetDeviceConfigDescriptor(1, &CurrConfigBytesRem, ConfigDescriptorData, sizeof(ConfigDescriptorData)))
@@ -65,104 +68,80 @@ uint8_t ProcessConfigurationDescriptor(void)
 			return ControlError;
 	}
 	
-	/* Get the CDC control interface from the configuration descriptor */
+	/* Get the first RNDIS control interface from the configuration descriptor */
 	if (USB_GetNextDescriptorComp(&CurrConfigBytesRem, &CurrConfigLocation,
 	                              DComp_NextCDCControlInterface) != DESCRIPTOR_SEARCH_COMP_Found)
 	{
 		/* Descriptor not found, error out */
-		return NoRNDISInterfaceFound;
+		return NoCompatibleInterfaceFound;
 	}
 
-	/* Get the IN and OUT data and IN notification endpoints for the RNDIS interface */
-	while (FoundEndpoints != ((1 << RNDIS_NOTIFICATIONPIPE) | (1 << RNDIS_DATAPIPE_IN) | (1 << RNDIS_DATAPIPE_OUT)))
+	while (!(DataINEndpoint) || !(DataOUTEndpoint) || !(NotificationEndpoint))
 	{
-		/* Fetch the next bulk or interrupt endpoint from the current RNDIS interface */
+		/* Get the next RNDIS interface's endpoint descriptor */
 		if (USB_GetNextDescriptorComp(&CurrConfigBytesRem, &CurrConfigLocation,
 		                              DComp_NextCDCDataInterfaceEndpoint) != DESCRIPTOR_SEARCH_COMP_Found)
 		{
-			/* Check to see if the control interface's notification pipe has been found, if so search for the data interface */
-			if (FoundEndpoints & (1 << RNDIS_NOTIFICATIONPIPE))
+			/* Check if we have already found the control interface's notification endpoint or not */
+			if (NotificationEndpoint)
 			{
-				/* Get the next CDC data interface from the configuration descriptor (RNDIS class has two CDC interfaces) */
-				if (USB_GetNextDescriptorComp(&CurrConfigBytesRem, &CurrConfigLocation, 
-				                              DComp_NextCDCDataInterface) != DESCRIPTOR_SEARCH_COMP_Found)
+				/* Get the next RNDIS data interface from the configuration descriptor */
+				if (USB_GetNextDescriptorComp(&CurrConfigBytesRem, &CurrConfigLocation,
+											  DComp_NextCDCDataInterface) != DESCRIPTOR_SEARCH_COMP_Found)
 				{
 					/* Descriptor not found, error out */
-					return NoRNDISInterfaceFound;
-				}
+					return NoCompatibleInterfaceFound;
+				}			
+
+				/* Clear any found endpoints */
+				DataINEndpoint       = NULL;
+				DataOUTEndpoint      = NULL;
 			}
 			else
 			{
-				/* Clear the found endpoints mask, since any already processed endpoints aren't in the CDC interface we need */
-				FoundEndpoints = 0;
-
-				/* Disable any already configured pipes from the invalid RNDIS interfaces */
-				Pipe_SelectPipe(RNDIS_NOTIFICATIONPIPE);
-				Pipe_DisablePipe();
-				Pipe_SelectPipe(RNDIS_DATAPIPE_IN);
-				Pipe_DisablePipe();
-				Pipe_SelectPipe(RNDIS_DATAPIPE_OUT);
-				Pipe_DisablePipe();
-			
-				/* Get the next CDC control interface from the configuration descriptor (CDC class has two CDC interfaces) */
+				/* Get the next RNDIS control interface from the configuration descriptor */
 				if (USB_GetNextDescriptorComp(&CurrConfigBytesRem, &CurrConfigLocation,
-				                              DComp_NextCDCControlInterface) != DESCRIPTOR_SEARCH_COMP_Found)
+											  DComp_NextCDCControlInterface) != DESCRIPTOR_SEARCH_COMP_Found)
 				{
 					/* Descriptor not found, error out */
-					return NoRNDISInterfaceFound;
+					return NoCompatibleInterfaceFound;
 				}
-			}
 
-			/* Fetch the next bulk or interrupt endpoint from the current CDC interface */
-			if (USB_GetNextDescriptorComp(&CurrConfigBytesRem, &CurrConfigLocation,
-			                              DComp_NextCDCDataInterfaceEndpoint) != DESCRIPTOR_SEARCH_COMP_Found)
-			{
-				/* Descriptor not found, error out */
-				return NoEndpointFound;
+				/* Clear any found endpoints */
+				NotificationEndpoint = NULL;
 			}
 		}
 		
+		/* Retrieve the endpoint address from the endpoint descriptor */
 		USB_Descriptor_Endpoint_t* EndpointData = DESCRIPTOR_PCAST(CurrConfigLocation, USB_Descriptor_Endpoint_t);
 
-		/* Check if the found endpoint is a interrupt or bulk type descriptor */
-		if ((EndpointData->Attributes & EP_TYPE_MASK) == EP_TYPE_INTERRUPT)
+		/* If the endpoint is a IN type endpoint */
+		if (EndpointData->EndpointAddress & ENDPOINT_DESCRIPTOR_DIR_IN)
 		{
-			/* If the endpoint is a IN type interrupt endpoint */
-			if (EndpointData->EndpointAddress & ENDPOINT_DESCRIPTOR_DIR_IN)
-			{							   
-				/* Configure the notification pipe */
-				Pipe_ConfigurePipe(RNDIS_NOTIFICATIONPIPE, EP_TYPE_INTERRUPT, PIPE_TOKEN_IN,
-								   EndpointData->EndpointAddress, EndpointData->EndpointSize, PIPE_BANK_SINGLE);
-
-				Pipe_SetInterruptPeriod(EndpointData->PollingIntervalMS);
-				
-				/* Set the flag indicating that the notification pipe has been found */
-				FoundEndpoints |= (1 << RNDIS_NOTIFICATIONPIPE);
-			}
+			/* Check if the found endpoint is a interrupt or bulk type descriptor */
+			if ((EndpointData->Attributes & EP_TYPE_MASK) == EP_TYPE_INTERRUPT)
+			  NotificationEndpoint = EndpointData;
+			else
+			  DataINEndpoint = EndpointData;
 		}
 		else
 		{
-			/* Check if the endpoint is a bulk IN or bulk OUT endpoint */
-			if (EndpointData->EndpointAddress & ENDPOINT_DESCRIPTOR_DIR_IN)
-			{
-				/* Configure the data IN pipe */
-				Pipe_ConfigurePipe(RNDIS_DATAPIPE_IN, EP_TYPE_BULK, PIPE_TOKEN_IN,
-								   EndpointData->EndpointAddress, EndpointData->EndpointSize, PIPE_BANK_SINGLE);
-				
-				/* Set the flag indicating that the data IN pipe has been found */
-				FoundEndpoints |= (1 << RNDIS_DATAPIPE_IN);
-			}
-			else
-			{
-				/* Configure the data OUT pipe */
-				Pipe_ConfigurePipe(RNDIS_DATAPIPE_OUT, EP_TYPE_BULK, PIPE_TOKEN_OUT,
-								   EndpointData->EndpointAddress, EndpointData->EndpointSize, PIPE_BANK_SINGLE);
-				
-				/* Set the flag indicating that the data OUT pipe has been found */
-				FoundEndpoints |= (1 << RNDIS_DATAPIPE_OUT);
-			}
+			DataOUTEndpoint = EndpointData;
 		}
 	}
+	
+	/* Configure the RNDIS data IN pipe */
+	Pipe_ConfigurePipe(RNDIS_DATA_IN_PIPE, EP_TYPE_BULK, PIPE_TOKEN_IN,
+	                   DataINEndpoint->EndpointAddress, DataINEndpoint->EndpointSize, PIPE_BANK_SINGLE);
+
+	/* Configure the RNDIS data OUT pipe */
+	Pipe_ConfigurePipe(RNDIS_DATA_OUT_PIPE, EP_TYPE_BULK, PIPE_TOKEN_OUT,
+					   DataOUTEndpoint->EndpointAddress, DataOUTEndpoint->EndpointSize, PIPE_BANK_SINGLE);
+
+	/* Configure the RNDIS notification pipe */
+	Pipe_ConfigurePipe(RNDIS_NOTIFICATION_PIPE, EP_TYPE_INTERRUPT, PIPE_TOKEN_IN,
+					   NotificationEndpoint->EndpointAddress, NotificationEndpoint->EndpointSize, PIPE_BANK_SINGLE);
+	Pipe_SetInterruptPeriod(NotificationEndpoint->PollingIntervalMS);
 
 	/* Valid data found, return success */
 	return SuccessfulConfigRead;