X-Git-Url: http://git.linex4red.de/pub/lufa.git/blobdiff_plain/ecf7538430c01b95104682f0f7493e57b9168125..ed031c1df2f5b053b9cd9f48c63e66a42b7c049e:/Demos/StillImageHost/ConfigDescriptor.c?ds=inline diff --git a/Demos/StillImageHost/ConfigDescriptor.c b/Demos/StillImageHost/ConfigDescriptor.c deleted file mode 100644 index a336c1f5e..000000000 --- a/Demos/StillImageHost/ConfigDescriptor.c +++ /dev/null @@ -1,191 +0,0 @@ -/* - LUFA Library - Copyright (C) Dean Camera, 2009. - - dean [at] fourwalledcubicle [dot] com - www.fourwalledcubicle.com -*/ - -/* - Copyright 2009 Dean Camera (dean [at] fourwalledcubicle [dot] com) - - Permission to use, copy, modify, and distribute this software - and its documentation for any purpose and without fee is hereby - granted, 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 - software without specific, written prior permission. - - The author disclaim all warranties with regard to this - software, including all implied warranties of merchantability - and fitness. In no event shall the author be liable for any - special, indirect or consequential damages or any damages - whatsoever resulting from loss of use, data or profits, whether - in an action of contract, negligence or other tortious action, - arising out of or in connection with the use or performance of - this software. -*/ - -/** \file - * - * USB Device Configuration Descriptor processing routines, to determine the correct pipe configurations - * needed to communication with an attached USB device. Descriptors are special computer-readable structures - * which the host requests upon device enumeration, to determine the device's capabilities and functions. - */ - -#include "ConfigDescriptor.h" - -/** Reads and processes an attached device's descriptors, to determine compatibility and pipe configurations. This - * routine will read in the entire configuration descriptor, and configure the hosts pipes to correctly communicate - * with compatible devices. - * - * This routine searches for a SI interface descriptor containing bulk IN and OUT data endpoints. - * - * \return An error code from the StillImageHost_GetConfigDescriptorDataCodes_t enum. - */ -uint8_t ProcessConfigurationDescriptor(void) -{ - uint8_t* ConfigDescriptorData; - uint16_t ConfigDescriptorSize; - uint8_t FoundEndpoints = 0; - - /* Get Configuration Descriptor size from the device */ - if (USB_Host_GetDeviceConfigDescriptor(&ConfigDescriptorSize, NULL) != HOST_SENDCONTROL_Successful) - return ControlError; - - /* Ensure that the Configuration Descriptor isn't too large */ - if (ConfigDescriptorSize > MAX_CONFIG_DESCRIPTOR_SIZE) - return DescriptorTooLarge; - - /* Allocate enough memory for the entire config descriptor */ - ConfigDescriptorData = alloca(ConfigDescriptorSize); - - /* Retrieve the entire configuration descriptor into the allocated buffer */ - USB_Host_GetDeviceConfigDescriptor(&ConfigDescriptorSize, ConfigDescriptorData); - - /* Validate returned data - ensure first entry is a configuration header descriptor */ - if (DESCRIPTOR_TYPE(ConfigDescriptorData) != DTYPE_Configuration) - return InvalidConfigDataReturned; - - /* Get the Still Image interface from the configuration descriptor */ - if (USB_Host_GetNextDescriptorComp(&ConfigDescriptorSize, &ConfigDescriptorData, NextStillImageInterface)) - { - /* Descriptor not found, error out */ - return NoInterfaceFound; - } - - /* Get the IN and OUT data and event endpoints for the Still Image interface */ - while (FoundEndpoints != ((1 << SIMAGE_EVENTS_PIPE) | (1 << SIMAGE_DATA_IN_PIPE) | (1 << SIMAGE_DATA_OUT_PIPE))) - { - /* Fetch the next endpoint from the current Still Image interface */ - if (USB_Host_GetNextDescriptorComp(&ConfigDescriptorSize, &ConfigDescriptorData, - NextSImageInterfaceDataEndpoint)) - { - /* Descriptor not found, error out */ - return NoEndpointFound; - } - - USB_Descriptor_Endpoint_t* EndpointData = DESCRIPTOR_PCAST(ConfigDescriptorData, USB_Descriptor_Endpoint_t); - - /* Check if the found endpoint is a interrupt or bulk type descriptor */ - if ((EndpointData->Attributes & EP_TYPE_MASK) == EP_TYPE_INTERRUPT) - { - /* If the endpoint is a IN type interrupt endpoint */ - if (EndpointData->EndpointAddress & ENDPOINT_DESCRIPTOR_DIR_IN) - { - /* Configure the events pipe */ - Pipe_ConfigurePipe(SIMAGE_EVENTS_PIPE, EP_TYPE_INTERRUPT, PIPE_TOKEN_IN, - EndpointData->EndpointAddress, EndpointData->EndpointSize, - PIPE_BANK_DOUBLE); - - Pipe_SetInfiniteINRequests(); - Pipe_SetInterruptPeriod(EndpointData->PollingIntervalMS); - - /* Set the flag indicating that the events pipe has been found */ - FoundEndpoints |= (1 << SIMAGE_EVENTS_PIPE); - } - } - else - { - /* Check if the endpoint is a bulk IN or bulk OUT endpoint */ - if (EndpointData->EndpointAddress & ENDPOINT_DESCRIPTOR_DIR_IN) - { - /* Configure the data IN pipe */ - Pipe_ConfigurePipe(SIMAGE_DATA_IN_PIPE, EP_TYPE_BULK, PIPE_TOKEN_IN, - EndpointData->EndpointAddress, EndpointData->EndpointSize, - PIPE_BANK_DOUBLE); - - Pipe_SetInfiniteINRequests(); - - /* Set the flag indicating that the data IN pipe has been found */ - FoundEndpoints |= (1 << SIMAGE_DATA_IN_PIPE); - } - else - { - /* Configure the data OUT pipe */ - Pipe_ConfigurePipe(SIMAGE_DATA_OUT_PIPE, EP_TYPE_BULK, PIPE_TOKEN_OUT, - EndpointData->EndpointAddress, EndpointData->EndpointSize, - PIPE_BANK_DOUBLE); - - /* Set the flag indicating that the data OUT pipe has been found */ - FoundEndpoints |= (1 << SIMAGE_DATA_OUT_PIPE); - } - } - } - - /* Valid data found, return success */ - return SuccessfulConfigRead; -} - -/** Descriptor comparator function. This comparator function is can be called while processing an attached USB device's - * configuration descriptor, to search for a specific sub descriptor. It can also be used to abort the configuration - * descriptor processing if an incompatible descriptor configuration is found. - * - * This comparator searches for the next Interface descriptor of the correct Still Image Class, Subclass and Protocol values. - * - * \return A value from the DSEARCH_Return_ErrorCodes_t enum - */ -DESCRIPTOR_COMPARATOR(NextStillImageInterface) -{ - if (DESCRIPTOR_TYPE(CurrentDescriptor) == DTYPE_Interface) - { - /* Check the descriptor class and protocol, break out if correct class/protocol interface found */ - if ((DESCRIPTOR_CAST(CurrentDescriptor, USB_Descriptor_Interface_t).Class == SIMAGE_CLASS) && - (DESCRIPTOR_CAST(CurrentDescriptor, USB_Descriptor_Interface_t).SubClass == SIMAGE_SUBCLASS) && - (DESCRIPTOR_CAST(CurrentDescriptor, USB_Descriptor_Interface_t).Protocol == SIMAGE_PROTOCOL)) - { - return Descriptor_Search_Found; - } - } - - return Descriptor_Search_NotFound; -} - -/** Descriptor comparator function. This comparator function is can be called while processing an attached USB device's - * configuration descriptor, to search for a specific sub descriptor. It can also be used to abort the configuration - * descriptor processing if an incompatible descriptor configuration is found. - * - * This comparator searches for the next Interrupt or Bulk Endpoint descriptor of the current SI interface, aborting the - * search if another interface descriptor is found before the next endpoint. - * - * \return A value from the DSEARCH_Return_ErrorCodes_t enum - */ -DESCRIPTOR_COMPARATOR(NextSImageInterfaceDataEndpoint) -{ - if (DESCRIPTOR_TYPE(CurrentDescriptor) == DTYPE_Endpoint) - { - uint8_t EndpointType = (DESCRIPTOR_CAST(CurrentDescriptor, - USB_Descriptor_Endpoint_t).Attributes & EP_TYPE_MASK); - - if ((EndpointType == EP_TYPE_BULK) || (EndpointType == EP_TYPE_INTERRUPT)) - return Descriptor_Search_Found; - } - else if (DESCRIPTOR_TYPE(CurrentDescriptor) == DTYPE_Interface) - { - return Descriptor_Search_Fail; - } - - return Descriptor_Search_NotFound; -}