Reverted Endpoint/Pipe non-sequential configuration hack, placed restriction on the...

[pub/USBasp.git] / Demos / Host / LowLevel / PrinterHost / ConfigDescriptor.c

diff --git a/Demos/Host/LowLevel/PrinterHost/ConfigDescriptor.c b/Demos/Host/LowLevel/PrinterHost/ConfigDescriptor.c
index 1e0f1be..0591aac 100644 (file)
--- a/Demos/Host/LowLevel/PrinterHost/ConfigDescriptor.c
+++ b/Demos/Host/LowLevel/PrinterHost/ConfigDescriptor.c
@@ -49,7 +49,9 @@ 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;
 
        /* Retrieve the entire configuration descriptor into the allocated buffer */
        switch (USB_Host_GetDeviceConfigDescriptor(1, &CurrConfigBytesRem, ConfigDescriptorData, sizeof(ConfigDescriptorData)))
@@ -64,52 +66,58 @@ uint8_t ProcessConfigurationDescriptor(void)
                        return ControlError;
        }
        
-       /* Get the printer interface from the configuration descriptor */
-       if (USB_GetNextDescriptorComp(&CurrConfigBytesRem, &CurrConfigLocation, DComp_NextBidirectionalPrinterInterface))
+       /* Get the first Printer interface from the configuration descriptor */
+       if (USB_GetNextDescriptorComp(&CurrConfigBytesRem, &CurrConfigLocation,
+                                     DComp_NextBidirectionalPrinterInterface) != DESCRIPTOR_SEARCH_COMP_Found)
        {
                /* Descriptor not found, error out */
-               return NoInterfaceFound;
+               return NoCompatibleInterfaceFound;
        }
-       
+
+       /* Save Printer interface details for later use */
        PrinterInterfaceNumber = DESCRIPTOR_CAST(CurrConfigLocation, USB_Descriptor_Interface_t).InterfaceNumber;
        PrinterAltSetting      = DESCRIPTOR_CAST(CurrConfigLocation, USB_Descriptor_Interface_t).AlternateSetting;
 
-       /* Get the IN and OUT data endpoints for the printer interface */
-       while (FoundEndpoints != ((1 << PRINTER_DATA_OUT_PIPE) | (1 << PRINTER_DATA_IN_PIPE)))
+       while (!(DataINEndpoint) || !(DataOUTEndpoint))
        {
-               /* Fetch the next bulk endpoint from the current printer interface */
-               if (USB_GetNextDescriptorComp(&CurrConfigBytesRem, &CurrConfigLocation, DComp_NextPrinterInterfaceBulkDataEndpoint))
+               /* Get the next Printer interface's data endpoint descriptor */
+               if (USB_GetNextDescriptorComp(&CurrConfigBytesRem, &CurrConfigLocation,
+                                             DComp_NextPrinterInterfaceBulkDataEndpoint) != DESCRIPTOR_SEARCH_COMP_Found)
                {
-                       /* Descriptor not found, error out */
-                       return NoEndpointFound;
+                       /* Clear any found endpoints */
+                       DataINEndpoint  = NULL;
+                       DataOUTEndpoint = NULL;
+
+                       /* Get the next Printer interface from the configuration descriptor */
+                       if (USB_GetNextDescriptorComp(&CurrConfigBytesRem, &CurrConfigLocation,
+                                                                                 DComp_NextBidirectionalPrinterInterface) != DESCRIPTOR_SEARCH_COMP_Found)
+                       {
+                               /* Descriptor not found, error out */
+                               return NoCompatibleInterfaceFound;
+                       }
+                       
+                       /* Save Printer interface details for later use */
+                       PrinterInterfaceNumber = DESCRIPTOR_CAST(CurrConfigLocation, USB_Descriptor_Interface_t).InterfaceNumber;
+                       PrinterAltSetting      = DESCRIPTOR_CAST(CurrConfigLocation, USB_Descriptor_Interface_t).AlternateSetting;                      
                }
                
+               /* Retrieve the endpoint address from the endpoint descriptor */
                USB_Descriptor_Endpoint_t* EndpointData = DESCRIPTOR_PCAST(CurrConfigLocation, USB_Descriptor_Endpoint_t);
 
-               /* Check if the endpoint is a bulk IN or bulk OUT endpoint, set appropriate globals */
+               /* If the endpoint is a IN type endpoint */
                if (EndpointData->EndpointAddress & ENDPOINT_DESCRIPTOR_DIR_IN)
-               {
-                       /* Configure the data IN pipe */
-                       Pipe_ConfigurePipe(PRINTER_DATA_IN_PIPE, EP_TYPE_BULK, PIPE_TOKEN_IN,
-                                          EndpointData->EndpointAddress, EndpointData->EndpointSize,
-                                          PIPE_BANK_SINGLE);
-
-                       Pipe_SetInfiniteINRequests();
-
-                       /* Set the flag indicating that the data IN pipe has been found */
-                       FoundEndpoints |= (1 << PRINTER_DATA_IN_PIPE);
-               }
+                 DataINEndpoint = EndpointData;
                else
-               {
-                       /* Configure the data OUT pipe */
-                       Pipe_ConfigurePipe(PRINTER_DATA_OUT_PIPE, 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 << PRINTER_DATA_OUT_PIPE);
-               }               
+                 DataOUTEndpoint = EndpointData;
        }
+       
+       /* Configure the Printer data IN pipe */
+       Pipe_ConfigurePipe(PRINTER_DATA_IN_PIPE, EP_TYPE_BULK, PIPE_TOKEN_IN,
+                          DataINEndpoint->EndpointAddress, DataINEndpoint->EndpointSize, PIPE_BANK_SINGLE);
+
+       /* Configure the Printer data OUT pipe */
+       Pipe_ConfigurePipe(PRINTER_DATA_OUT_PIPE, EP_TYPE_BULK, PIPE_TOKEN_OUT,
+                                          DataOUTEndpoint->EndpointAddress, DataOUTEndpoint->EndpointSize, PIPE_BANK_SINGLE);
 
        /* Valid data found, return success */
        return SuccessfulConfigRead;