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

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

diff --git a/Demos/Host/LowLevel/MIDIHost/ConfigDescriptor.c b/Demos/Host/LowLevel/MIDIHost/ConfigDescriptor.c
index 0c2ddfa..3ede457 100644 (file)
--- a/Demos/Host/LowLevel/MIDIHost/ConfigDescriptor.c
+++ b/Demos/Host/LowLevel/MIDIHost/ConfigDescriptor.c
@@ -50,7 +50,9 @@ uint8_t ProcessConfigurationDescriptor(void)
        uint8_t  ConfigDescriptorData[512];
        void*    CurrConfigLocation = ConfigDescriptorData;
        uint16_t CurrConfigBytesRem;
        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)))
 
        /* Retrieve the entire configuration descriptor into the allocated buffer */
        switch (USB_Host_GetDeviceConfigDescriptor(1, &CurrConfigBytesRem, ConfigDescriptorData, sizeof(ConfigDescriptorData)))


@@ -65,47 +67,50 @@ uint8_t ProcessConfigurationDescriptor(void)
                        return ControlError;
        }
        
                        return ControlError;
        }
        

-       /* Get the MIDI Audio Streaming interface from the configuration descriptor */
+       /* Get the first MIDI interface from the configuration descriptor */

        if (USB_GetNextDescriptorComp(&CurrConfigBytesRem, &CurrConfigLocation,
                                      DComp_NextMIDIStreamingInterface) != DESCRIPTOR_SEARCH_COMP_Found)
        {
                /* Descriptor not found, error out */
        if (USB_GetNextDescriptorComp(&CurrConfigBytesRem, &CurrConfigLocation,
                                      DComp_NextMIDIStreamingInterface) != DESCRIPTOR_SEARCH_COMP_Found)
        {
                /* Descriptor not found, error out */

-               return NoCDCInterfaceFound;
+               return NoCompatibleInterfaceFound;

        }
        }

-       
-       /* Get the IN and OUT data endpoints for the MIDI interface */
-       while (FoundEndpoints != ((1 << MIDI_DATAPIPE_IN) | (1 << MIDI_DATAPIPE_OUT)))
+
+       while (!(DataINEndpoint) || !(DataOUTEndpoint))

        {
        {

-               /* Fetch the next bulk endpoint from the current MIDI streaming interface */
+               /* Get the next MIDI interface's data endpoint descriptor */

                if (USB_GetNextDescriptorComp(&CurrConfigBytesRem, &CurrConfigLocation,
                                              DComp_NextMIDIStreamingDataEndpoint) != DESCRIPTOR_SEARCH_COMP_Found)
                {
                if (USB_GetNextDescriptorComp(&CurrConfigBytesRem, &CurrConfigLocation,
                                              DComp_NextMIDIStreamingDataEndpoint) != DESCRIPTOR_SEARCH_COMP_Found)
                {

-                       /* Descriptor not found, error out */
-                       return NoEndpointFound;
+                       /* Clear any found endpoints */
+                       DataINEndpoint  = NULL;
+                       DataOUTEndpoint = NULL;
+
+                       /* Get the next Mass Storage interface from the configuration descriptor */
+                       if (USB_GetNextDescriptorComp(&CurrConfigBytesRem, &CurrConfigLocation,
+                                                                                 DComp_NextMIDIStreamingInterface) != DESCRIPTOR_SEARCH_COMP_Found)
+                       {
+                               /* Descriptor not found, error out */
+                               return NoCompatibleInterfaceFound;
+                       }

                }
                
                }
                

+               /* Retrieve the endpoint address from the endpoint descriptor */

                USB_Descriptor_Endpoint_t* EndpointData = DESCRIPTOR_PCAST(CurrConfigLocation, USB_Descriptor_Endpoint_t);
 
                USB_Descriptor_Endpoint_t* EndpointData = DESCRIPTOR_PCAST(CurrConfigLocation, USB_Descriptor_Endpoint_t);
 

-               /* Check if the endpoint is a bulk IN or bulk OUT endpoint */
+               /* If the endpoint is a IN type endpoint */

                if (EndpointData->EndpointAddress & ENDPOINT_DESCRIPTOR_DIR_IN)
                if (EndpointData->EndpointAddress & ENDPOINT_DESCRIPTOR_DIR_IN)

-               {
-                       /* Configure the data IN pipe */
-                       Pipe_ConfigurePipe(MIDI_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 << MIDI_DATAPIPE_IN);
-               }
+                 DataINEndpoint = EndpointData;

                else
                else

-               {
-                       /* Configure the data OUT pipe */
-                       Pipe_ConfigurePipe(MIDI_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 << MIDI_DATAPIPE_OUT);
-               }
+                 DataOUTEndpoint = EndpointData;

        }
        }

+       
+       /* Configure the MIDI data IN pipe */
+       Pipe_ConfigurePipe(MIDI_DATA_IN_PIPE, EP_TYPE_BULK, PIPE_TOKEN_IN,
+                          DataINEndpoint->EndpointAddress, DataINEndpoint->EndpointSize, PIPE_BANK_SINGLE);
+
+       /* Configure the MIDI data OUT pipe */
+       Pipe_ConfigurePipe(MIDI_DATA_OUT_PIPE, EP_TYPE_BULK, PIPE_TOKEN_OUT,
+                                          DataOUTEndpoint->EndpointAddress, DataOUTEndpoint->EndpointSize, PIPE_BANK_SINGLE);

 
        /* Valid data found, return success */
        return SuccessfulConfigRead;
 
        /* Valid data found, return success */
        return SuccessfulConfigRead;