X-Git-Url: http://git.linex4red.de/pub/USBasp.git/blobdiff_plain/071e02c6b6b4837fa9cf0b6d4c749994e02638d7..77a9df36a77d2523dd2bc24fa17f9f04c6c175c5:/Projects/MissileLauncher/ConfigDescriptor.c?ds=inline diff --git a/Projects/MissileLauncher/ConfigDescriptor.c b/Projects/MissileLauncher/ConfigDescriptor.c index 7214c7e6a..a4a78805a 100644 --- a/Projects/MissileLauncher/ConfigDescriptor.c +++ b/Projects/MissileLauncher/ConfigDescriptor.c @@ -1,21 +1,21 @@ /* LUFA Library - Copyright (C) Dean Camera, 2010. - + Copyright (C) Dean Camera, 2011. + dean [at] fourwalledcubicle [dot] com - www.fourwalledcubicle.com + www.lufa-lib.org */ /* - Copyright 2010 Dean Camera (dean [at] fourwalledcubicle [dot] com) + Copyright 2011 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 @@ -50,7 +50,10 @@ uint8_t ProcessConfigurationDescriptor(void) uint8_t ConfigDescriptorData[512]; void* CurrConfigLocation = ConfigDescriptorData; uint16_t CurrConfigBytesRem; - uint8_t FoundEndpoints = 0; + + 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))) @@ -64,52 +67,60 @@ uint8_t ProcessConfigurationDescriptor(void) default: return ControlError; } - - /* Get the HID interface from the configuration descriptor */ - if (USB_GetNextDescriptorComp(&CurrConfigBytesRem, &CurrConfigLocation, - DComp_NextHIDInterface) != DESCRIPTOR_SEARCH_COMP_Found) - { - /* Descriptor not found, error out */ - return NoHIDInterfaceFound; - } - while (FoundEndpoints != ((1 << HID_DATA_IN_PIPE) | (1 << HID_DATA_OUT_PIPE))) + while (!(DataINEndpoint) || !(DataOUTEndpoint)) { - /* Get the next HID interface's data endpoint descriptor */ - if (USB_GetNextDescriptorComp(&CurrConfigBytesRem, &CurrConfigLocation, - DComp_NextInterfaceHIDDataEndpoint) != DESCRIPTOR_SEARCH_COMP_Found) + /* 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 (FoundEndpoints == (1 << HID_DATA_IN_PIPE)) + if (DataINEndpoint) break; - - /* Descriptor not found, error out */ - return NoEndpointFound; + + /* Get the next HID interface from the configuration descriptor */ + if (USB_GetNextDescriptorComp(&CurrConfigBytesRem, &CurrConfigLocation, + DComp_NextHIDInterface) != DESCRIPTOR_SEARCH_COMP_Found) + { + /* 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(ConfigDescriptorData, USB_Descriptor_Endpoint_t); + USB_Descriptor_Endpoint_t* EndpointData = DESCRIPTOR_PCAST(CurrConfigLocation, USB_Descriptor_Endpoint_t); /* If the endpoint is a IN type endpoint */ if (EndpointData->EndpointAddress & ENDPOINT_DESCRIPTOR_DIR_IN) - { - /* Configure the HID data IN pipe */ - Pipe_ConfigurePipe(HID_DATA_IN_PIPE, EP_TYPE_INTERRUPT, PIPE_TOKEN_IN, - EndpointData->EndpointAddress, EndpointData->EndpointSize, PIPE_BANK_SINGLE); - - FoundEndpoints |= (1 << HID_DATA_IN_PIPE); - } + DataINEndpoint = EndpointData; else - { - /* Configure the HID data OUT pipe */ - Pipe_ConfigurePipe(HID_DATA_OUT_PIPE, EP_TYPE_INTERRUPT, PIPE_TOKEN_OUT, - EndpointData->EndpointAddress, EndpointData->EndpointSize, PIPE_BANK_SINGLE); - - FoundEndpoints |= (1 << HID_DATA_OUT_PIPE); - } + 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; } @@ -124,17 +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; } @@ -148,20 +163,25 @@ uint8_t DComp_NextHIDInterface(void* CurrentDescriptor) * * \return A value from the DSEARCH_Return_ErrorCodes_t enum */ -uint8_t DComp_NextInterfaceHIDDataEndpoint(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; + } } +