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Diffstat (limited to 'lib/lufa/Demos/Host/LowLevel/KeyboardHost/ConfigDescriptor.c')
| -rw-r--r-- | lib/lufa/Demos/Host/LowLevel/KeyboardHost/ConfigDescriptor.c | 155 |
1 files changed, 0 insertions, 155 deletions
diff --git a/lib/lufa/Demos/Host/LowLevel/KeyboardHost/ConfigDescriptor.c b/lib/lufa/Demos/Host/LowLevel/KeyboardHost/ConfigDescriptor.c deleted file mode 100644 index 1c152b7402..0000000000 --- a/lib/lufa/Demos/Host/LowLevel/KeyboardHost/ConfigDescriptor.c +++ /dev/null @@ -1,155 +0,0 @@ -/* - LUFA Library - Copyright (C) Dean Camera, 2017. - - dean [at] fourwalledcubicle [dot] com - www.lufa-lib.org -*/ - -/* - Copyright 2017 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 \ref KeyboardHost_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; - - /* 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)) - { - /* 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_NextKeyboardInterfaceDataEndpoint) != DESCRIPTOR_SEARCH_COMP_Found) - { - /* Get the next HID interface from the configuration descriptor */ - if (USB_GetNextDescriptorComp(&CurrConfigBytesRem, &CurrConfigLocation, - DComp_NextKeyboardInterface) != 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); - - /* 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; - } - - /* Configure the HID data IN pipe */ - Pipe_ConfigurePipe(KEYBOARD_DATA_IN_PIPE, EP_TYPE_INTERRUPT, DataINEndpoint->EndpointAddress, DataINEndpoint->EndpointSize, 1); - Pipe_SetInterruptPeriod(DataINEndpoint->PollingIntervalMS); - - /* 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 Keyboard HID Class and Protocol values. - * - * \return A value from the DSEARCH_Return_ErrorCodes_t enum - */ -uint8_t DComp_NextKeyboardInterface(void* CurrentDescriptor) -{ - USB_Descriptor_Header_t* Header = DESCRIPTOR_PCAST(CurrentDescriptor, USB_Descriptor_Header_t); - - 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_CSCP_HIDClass) && - (Interface->Protocol == HID_CSCP_KeyboardBootProtocol)) - { - 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 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_NextKeyboardInterfaceDataEndpoint(void* CurrentDescriptor) -{ - USB_Descriptor_Header_t* Header = DESCRIPTOR_PCAST(CurrentDescriptor, USB_Descriptor_Header_t); - - if (Header->Type == DTYPE_Endpoint) - return DESCRIPTOR_SEARCH_Found; - else if (Header->Type == DTYPE_Interface) - return DESCRIPTOR_SEARCH_Fail; - else - return DESCRIPTOR_SEARCH_NotFound; -} - |