X-Git-Url: http://git.linex4red.de/pub/USBasp.git/blobdiff_plain/7166c7ba3e27f3458b83360302c8af8a866f7a34..a8b66f318dda3cc18dfcedaa3af3d01ab68b82e8:/Projects/MissileLauncher/ConfigDescriptor.c?ds=sidebyside diff --git a/Projects/MissileLauncher/ConfigDescriptor.c b/Projects/MissileLauncher/ConfigDescriptor.c index 78b4d2fad..b26fa7545 100644 --- a/Projects/MissileLauncher/ConfigDescriptor.c +++ b/Projects/MissileLauncher/ConfigDescriptor.c @@ -1,21 +1,21 @@ /* LUFA Library Copyright (C) Dean Camera, 2010. - + dean [at] fourwalledcubicle [dot] com - www.fourwalledcubicle.com + www.lufa-lib.org */ /* Copyright 2010 Dean Camera (dean [at] fourwalledcubicle [dot] com) - Permission to use, copy, modify, distribute, and sell this + Permission to use, copy, modify, distribute, and sell this software and its documentation for any purpose is hereby granted - without fee, provided that the above copyright notice appear in + without fee, provided that the above copyright notice appear in all copies and that both that the copyright notice and this - permission notice and warranty disclaimer appear in supporting - documentation, and that the name of the author not be used in - advertising or publicity pertaining to distribution of the + permission notice and warranty disclaimer appear in supporting + documentation, and that the name of the author not be used in + advertising or publicity pertaining to distribution of the software without specific, written prior permission. The author disclaim all warranties with regard to this @@ -50,9 +50,10 @@ uint8_t ProcessConfigurationDescriptor(void) uint8_t ConfigDescriptorData[512]; void* CurrConfigLocation = ConfigDescriptorData; uint16_t CurrConfigBytesRem; - - USB_Descriptor_Endpoint_t* DataINEndpoint = NULL; - USB_Descriptor_Endpoint_t* DataOUTEndpoint = NULL; + + USB_Descriptor_Interface_t* HIDInterface = NULL; + 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))) @@ -66,28 +67,18 @@ uint8_t ProcessConfigurationDescriptor(void) default: return ControlError; } - - /* Get the first HID interface from the configuration descriptor */ - if (USB_GetNextDescriptorComp(&CurrConfigBytesRem, &CurrConfigLocation, - DComp_NextHIDInterface) != DESCRIPTOR_SEARCH_COMP_Found) - { - /* Descriptor not found, error out */ - return NoCompatibleInterfaceFound; - } while (!(DataINEndpoint) || !(DataOUTEndpoint)) { - /* Get the next HID interface's data 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 (!(HIDInterface) || + USB_GetNextDescriptorComp(&CurrConfigBytesRem, &CurrConfigLocation, DComp_NextHIDInterfaceDataEndpoint) != DESCRIPTOR_SEARCH_COMP_Found) { /* Not all HID devices have an OUT endpoint - if we've reached the end of the HID descriptor * but only found the mandatory IN endpoint, it's safe to continue with the device enumeration */ if (DataINEndpoint) break; - - /* Clear any found endpoints */ - DataOUTEndpoint = NULL; /* Get the next HID interface from the configuration descriptor */ if (USB_GetNextDescriptorComp(&CurrConfigBytesRem, &CurrConfigLocation, @@ -96,11 +87,17 @@ uint8_t ProcessConfigurationDescriptor(void) /* Descriptor not found, error out */ return NoCompatibleInterfaceFound; } - + + /* Save the interface in case we need to refer back to it later */ + HIDInterface = DESCRIPTOR_PCAST(CurrConfigLocation, USB_Descriptor_Interface_t); + + /* Clear any found endpoints */ + DataOUTEndpoint = NULL; + /* 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); @@ -110,20 +107,20 @@ uint8_t ProcessConfigurationDescriptor(void) else DataOUTEndpoint = EndpointData; } - + /* Configure the HID data IN pipe */ Pipe_ConfigurePipe(HID_DATA_IN_PIPE, EP_TYPE_INTERRUPT, PIPE_TOKEN_IN, DataINEndpoint->EndpointAddress, DataINEndpoint->EndpointSize, PIPE_BANK_SINGLE); Pipe_SetInterruptPeriod(DataINEndpoint->PollingIntervalMS); - + /* Check if the HID interface contained an optional OUT data endpoint */ if (DataOUTEndpoint) { /* Configure the HID data OUT pipe */ Pipe_ConfigurePipe(HID_DATA_OUT_PIPE, EP_TYPE_INTERRUPT, PIPE_TOKEN_OUT, DataOUTEndpoint->EndpointAddress, DataOUTEndpoint->EndpointSize, PIPE_BANK_SINGLE); - } - + } + /* Valid data found, return success */ return SuccessfulConfigRead; } @@ -138,17 +135,21 @@ uint8_t ProcessConfigurationDescriptor(void) */ uint8_t DComp_NextHIDInterface(void* CurrentDescriptor) { + USB_Descriptor_Header_t* Header = DESCRIPTOR_PCAST(CurrentDescriptor, USB_Descriptor_Header_t); + /* Determine if the current descriptor is an interface descriptor */ - if (DESCRIPTOR_TYPE(CurrentDescriptor) == DTYPE_Interface) + if (Header->Type == DTYPE_Interface) { + USB_Descriptor_Interface_t* Interface = DESCRIPTOR_PCAST(CurrentDescriptor, USB_Descriptor_Interface_t); + /* Check the HID descriptor class and protocol, break out if correct class/protocol interface found */ - if (DESCRIPTOR_CAST(CurrentDescriptor, USB_Descriptor_Interface_t).Class == HID_CLASS) + if (Interface->Class == HID_CLASS) { /* Indicate that the descriptor being searched for has been found */ return DESCRIPTOR_SEARCH_Found; } } - + /* Current descriptor does not match what this comparator is looking for */ return DESCRIPTOR_SEARCH_NotFound; } @@ -164,18 +165,23 @@ uint8_t DComp_NextHIDInterface(void* CurrentDescriptor) */ uint8_t DComp_NextHIDInterfaceDataEndpoint(void* CurrentDescriptor) { + USB_Descriptor_Header_t* Header = DESCRIPTOR_PCAST(CurrentDescriptor, USB_Descriptor_Header_t); + /* Determine the type of the current descriptor */ - if (DESCRIPTOR_TYPE(CurrentDescriptor) == DTYPE_Endpoint) + if (Header->Type == DTYPE_Endpoint) { /* Indicate that the descriptor being searched for has been found */ return DESCRIPTOR_SEARCH_Found; } - else if (DESCRIPTOR_TYPE(CurrentDescriptor) == DTYPE_Interface) + else if (Header->Type == DTYPE_Interface) { /* Indicate that the search has failed prematurely and should be aborted */ return DESCRIPTOR_SEARCH_Fail; } - - /* Current descriptor does not match what this comparator is looking for */ - return DESCRIPTOR_SEARCH_NotFound; + else + { + /* Current descriptor does not match what this comparator is looking for */ + return DESCRIPTOR_SEARCH_NotFound; + } } +