X-Git-Url: http://git.linex4red.de/pub/USBasp.git/blobdiff_plain/7f9f97c792dee6875fbca9806422bdd7d6c5a657..3642ea0b9715cdf0196b10c9fc97898940eaefa6:/Projects/MissileLauncher/ConfigDescriptor.c diff --git a/Projects/MissileLauncher/ConfigDescriptor.c b/Projects/MissileLauncher/ConfigDescriptor.c index 88f7bacb7..295caa5ff 100644 --- a/Projects/MissileLauncher/ConfigDescriptor.c +++ b/Projects/MissileLauncher/ConfigDescriptor.c @@ -1,167 +1,185 @@ -/* - LUFA Library - Copyright (C) Dean Camera, 2010. - - dean [at] fourwalledcubicle [dot] com - www.fourwalledcubicle.com -*/ - -/* - Copyright 2010 Dean Camera (dean [at] fourwalledcubicle [dot] com) - - 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 - 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 HID interface descriptor containing at least one Interrupt type IN endpoint. - * - * \return An error code from the GenericHIDHost_GetConfigDescriptorDataCodes_t enum. - */ -uint8_t ProcessConfigurationDescriptor(void) -{ - uint8_t ConfigDescriptorData[512]; - void* CurrConfigLocation = ConfigDescriptorData; - uint16_t CurrConfigBytesRem; - uint8_t FoundEndpoints = 0; - - /* Retrieve the entire configuration descriptor into the allocated buffer */ - switch (USB_Host_GetDeviceConfigDescriptor(1, &CurrConfigBytesRem, ConfigDescriptorData, sizeof(ConfigDescriptorData))) - { - case HOST_GETCONFIG_Successful: - break; - case HOST_GETCONFIG_InvalidData: - return InvalidConfigDataReturned; - case HOST_GETCONFIG_BuffOverflow: - return DescriptorTooLarge; - 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))) - { - /* Get the next HID interface's data endpoint descriptor */ - if (USB_GetNextDescriptorComp(&CurrConfigBytesRem, &CurrConfigLocation, - DComp_NextInterfaceHIDDataEndpoint) != 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)) - break; - - /* Descriptor not found, error out */ - return NoEndpointFound; - } - - /* Retrieve the endpoint address from the endpoint descriptor */ - USB_Descriptor_Endpoint_t* EndpointData = DESCRIPTOR_PCAST(ConfigDescriptorData, 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); - } - 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); - } - } - - /* 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 HID Class value. - * - * \return A value from the DSEARCH_Return_ErrorCodes_t enum - */ -uint8_t DComp_NextHIDInterface(void* CurrentDescriptor) -{ - /* Determine if the current descriptor is an interface descriptor */ - if (DESCRIPTOR_TYPE(CurrentDescriptor) == DTYPE_Interface) - { - /* 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) - { - /* 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; -} - -/** 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 Endpoint descriptor inside the current interface descriptor, - * aborting the search if another interface descriptor is found before the required endpoint. - * - * \return A value from the DSEARCH_Return_ErrorCodes_t enum - */ -uint8_t DComp_NextInterfaceHIDDataEndpoint(void* CurrentDescriptor) -{ - /* Determine the type of the current descriptor */ - if (DESCRIPTOR_TYPE(CurrentDescriptor) == DTYPE_Endpoint) - { - /* Indicate that the descriptor being searched for has been found */ - return DESCRIPTOR_SEARCH_Found; - } - else if (DESCRIPTOR_TYPE(CurrentDescriptor) == 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; -} +/* + LUFA Library + Copyright (C) Dean Camera, 2015. + + dean [at] fourwalledcubicle [dot] com + www.lufa-lib.org +*/ + +/* + Copyright 2015 Dean Camera (dean [at] fourwalledcubicle [dot] com) + + 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 + 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 disclaims 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 HID interface descriptor containing at least one Interrupt type IN endpoint. + * + * \return An error code from the GenericHIDHost_GetConfigDescriptorDataCodes_t enum. + */ +uint8_t ProcessConfigurationDescriptor(void) +{ + uint8_t ConfigDescriptorData[512]; + void* CurrConfigLocation = ConfigDescriptorData; + uint16_t CurrConfigBytesRem; + + 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))) + { + case HOST_GETCONFIG_Successful: + break; + case HOST_GETCONFIG_InvalidData: + return InvalidConfigDataReturned; + case HOST_GETCONFIG_BuffOverflow: + return DescriptorTooLarge; + default: + return ControlError; + } + + while (!(DataINEndpoint) || !(DataOUTEndpoint)) + { + /* 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; + + /* 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(CurrConfigLocation, USB_Descriptor_Endpoint_t); + + /* If the endpoint is a IN type endpoint */ + if ((EndpointData->EndpointAddress & ENDPOINT_DIR_MASK) == ENDPOINT_DIR_IN) + DataINEndpoint = EndpointData; + else + DataOUTEndpoint = EndpointData; + } + + /* Configure the HID data IN pipe */ + Pipe_ConfigurePipe(HID_DATA_IN_PIPE, EP_TYPE_INTERRUPT, DataINEndpoint->EndpointAddress, DataINEndpoint->EndpointSize, 1); + 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, DataOUTEndpoint->EndpointAddress, DataOUTEndpoint->EndpointSize, 1); + } + + /* 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 HID Class value. + * + * \return A value from the DSEARCH_Return_ErrorCodes_t enum + */ +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 (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 (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; +} + +/** 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 Endpoint descriptor inside the current interface descriptor, + * aborting the search if another interface descriptor is found before the required endpoint. + * + * \return A value from the DSEARCH_Return_ErrorCodes_t enum + */ +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 (Header->Type == DTYPE_Endpoint) + { + /* Indicate that the descriptor being searched for has been found */ + return DESCRIPTOR_SEARCH_Found; + } + else if (Header->Type == DTYPE_Interface) + { + /* Indicate that the search has failed prematurely and should be aborted */ + return DESCRIPTOR_SEARCH_Fail; + } + else + { + /* Current descriptor does not match what this comparator is looking for */ + return DESCRIPTOR_SEARCH_NotFound; + } +} +