diff options
Diffstat (limited to 'Demos/Host/LowLevel/RNDISEthernetHost/ConfigDescriptor.c')
| -rw-r--r-- | Demos/Host/LowLevel/RNDISEthernetHost/ConfigDescriptor.c | 23 |
1 files changed, 10 insertions, 13 deletions
diff --git a/Demos/Host/LowLevel/RNDISEthernetHost/ConfigDescriptor.c b/Demos/Host/LowLevel/RNDISEthernetHost/ConfigDescriptor.c index aa75dd174..58e1408c1 100644 --- a/Demos/Host/LowLevel/RNDISEthernetHost/ConfigDescriptor.c +++ b/Demos/Host/LowLevel/RNDISEthernetHost/ConfigDescriptor.c @@ -51,9 +51,10 @@ uint8_t ProcessConfigurationDescriptor(void) void* CurrConfigLocation = ConfigDescriptorData; uint16_t CurrConfigBytesRem; - USB_Descriptor_Endpoint_t* DataINEndpoint = NULL; - USB_Descriptor_Endpoint_t* DataOUTEndpoint = NULL; - USB_Descriptor_Endpoint_t* NotificationEndpoint = NULL; + USB_Descriptor_Interface_t* RNDISControlInterface = NULL; + 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))) @@ -67,19 +68,12 @@ uint8_t ProcessConfigurationDescriptor(void) default: return ControlError; } - - /* 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 NoCompatibleInterfaceFound; - } while (!(DataINEndpoint) || !(DataOUTEndpoint) || !(NotificationEndpoint)) { - /* Get the next RNDIS interface's endpoint descriptor */ - if (USB_GetNextDescriptorComp(&CurrConfigBytesRem, &CurrConfigLocation, + /* See if we've found a likely compatible interface, and if there is an endpoint within that interface */ + if (!(RNDISControlInterface) || + USB_GetNextDescriptorComp(&CurrConfigBytesRem, &CurrConfigLocation, DComp_NextCDCDataInterfaceEndpoint) != DESCRIPTOR_SEARCH_COMP_Found) { /* Check if we have already found the control interface's notification endpoint or not */ @@ -107,6 +101,9 @@ uint8_t ProcessConfigurationDescriptor(void) return NoCompatibleInterfaceFound; } + /* Save the interface in case we need to refer back to it later */ + RNDISControlInterface = DESCRIPTOR_PCAST(CurrConfigLocation, USB_Descriptor_Interface_t); + /* Clear any found endpoints */ NotificationEndpoint = NULL; } |