X-Git-Url: http://git.linex4red.de/pub/USBasp.git/blobdiff_plain/7f9f97c792dee6875fbca9806422bdd7d6c5a657..7aaced1e8bc81ebbf0a1f06fc443ea4707edd1dd:/Demos/Host/Incomplete/BluetoothHost/ConfigDescriptor.c diff --git a/Demos/Host/Incomplete/BluetoothHost/ConfigDescriptor.c b/Demos/Host/Incomplete/BluetoothHost/ConfigDescriptor.c index ba4ac4d3b..cc7570387 100644 --- a/Demos/Host/Incomplete/BluetoothHost/ConfigDescriptor.c +++ b/Demos/Host/Incomplete/BluetoothHost/ConfigDescriptor.c @@ -1,132 +1,143 @@ -/* - 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. -*/ - -#include "ConfigDescriptor.h" - -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 ControlErrorDuringConfigRead; - } - - /* The bluetooth USB transport addendum mandates that the data (not streaming voice) endpoints - be in the first interface descriptor (interface 0) */ - USB_GetNextDescriptorOfType(&CurrConfigBytesRem, &CurrConfigLocation, DTYPE_Interface); - - /* Ensure that an interface was found, and the end of the descriptor was not reached */ - if (!(CurrConfigBytesRem)) - return NoInterfaceFound; - - /* Get the data IN, data OUT and event notification endpoints for the bluetooth interface */ - while (FoundEndpoints != ((1 << BLUETOOTH_DATA_IN_PIPE) | (1 << BLUETOOTH_DATA_OUT_PIPE) | - (1 << BLUETOOTH_EVENTS_PIPE))) - { - /* Fetch the next endpoint from the current bluetooth interface */ - if (USB_GetNextDescriptorComp(&CurrConfigBytesRem, &CurrConfigLocation, - NextInterfaceBluetoothDataEndpoint)) - { - /* Descriptor not found, error out */ - return NoEndpointFound; - } - - USB_Descriptor_Endpoint_t* EndpointData = DESCRIPTOR_PCAST(CurrConfigLocation, USB_Descriptor_Endpoint_t); - - /* Check if the endpoint is a bulk or interrupt type endpoint */ - if ((EndpointData->Attributes & EP_TYPE_MASK) == EP_TYPE_INTERRUPT) - { - if (EndpointData->EndpointAddress & ENDPOINT_DESCRIPTOR_DIR_IN) - { - /* Configure the events IN pipe */ - Pipe_ConfigurePipe(BLUETOOTH_EVENTS_PIPE, EP_TYPE_INTERRUPT, PIPE_TOKEN_IN, - EndpointData->EndpointAddress, EndpointData->EndpointSize, - PIPE_BANK_SINGLE); - - Pipe_SetInterruptPeriod(EndpointData->PollingIntervalMS); - - /* Set the flag indicating that the events notification pipe has been found */ - FoundEndpoints |= (1 << BLUETOOTH_EVENTS_PIPE); - } - } - else - { - if (EndpointData->EndpointAddress & ENDPOINT_DESCRIPTOR_DIR_IN) - { - /* Configure the data IN pipe */ - Pipe_ConfigurePipe(BLUETOOTH_DATA_IN_PIPE, EP_TYPE_BULK, PIPE_TOKEN_IN, - EndpointData->EndpointAddress, EndpointData->EndpointSize, - PIPE_BANK_SINGLE); - - /* Set the flag indicating that the data IN pipe has been found */ - FoundEndpoints |= (1 << BLUETOOTH_DATA_IN_PIPE); - } - else - { - /* Configure the data OUT pipe */ - Pipe_ConfigurePipe(BLUETOOTH_DATA_OUT_PIPE, EP_TYPE_BULK, PIPE_TOKEN_OUT, - EndpointData->EndpointAddress, EndpointData->EndpointSize, - PIPE_BANK_SINGLE); - - /* Set the flag indicating that the data OUT pipe has been found */ - FoundEndpoints |= (1 << BLUETOOTH_DATA_OUT_PIPE); - } - } - - } - - /* Valid data found, return success */ - return SuccessfulConfigRead; -} - -uint8_t NextInterfaceBluetoothDataEndpoint(void* CurrentDescriptor) -{ - /* PURPOSE: Find next interface endpoint descriptor before next interface descriptor */ - - if (DESCRIPTOR_TYPE(CurrentDescriptor) == DTYPE_Endpoint) - return DESCRIPTOR_SEARCH_Found; - else if (DESCRIPTOR_TYPE(CurrentDescriptor) == DTYPE_Interface) - return DESCRIPTOR_SEARCH_Fail; - - return DESCRIPTOR_SEARCH_NotFound; -} - +/* + 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 BT interface descriptor containing bulk IN and OUT data endpoints. + * + * \return An error code from the \ref BluetoothHost_GetConfigDescriptorDataCodes_t enum. + */ +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_Endpoint_t* EventsEndpoint = 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 DevControlError; + } + + /* The Bluetooth USB transport addendum mandates that the data (not streaming voice) endpoints + be in the first interface descriptor (interface 0) */ + USB_GetNextDescriptorOfType(&CurrConfigBytesRem, &CurrConfigLocation, DTYPE_Interface); + + /* Ensure that an interface was found, and the end of the descriptor was not reached */ + if (!(CurrConfigBytesRem)) + return NoCompatibleInterfaceFound; + + while (!(DataINEndpoint) || !(DataOUTEndpoint)) + { + /* Get the next Still Image interface's data endpoint descriptor */ + if (USB_GetNextDescriptorComp(&CurrConfigBytesRem, &CurrConfigLocation, + DComp_NextInterfaceBluetoothDataEndpoint) != DESCRIPTOR_SEARCH_COMP_Found) + { + /* Data endpoints not found within the first bluetooth device interface, error out */ + return NoCompatibleInterfaceFound; + } + + /* 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_DESCRIPTOR_DIR_IN) + { + /* Check if the found endpoint is a interrupt or bulk type descriptor */ + if ((EndpointData->Attributes & EP_TYPE_MASK) == EP_TYPE_INTERRUPT) + EventsEndpoint = EndpointData; + else + DataINEndpoint = EndpointData; + } + else + { + DataOUTEndpoint = EndpointData; + } + } + + /* Configure the Bluetooth data IN pipe */ + Pipe_ConfigurePipe(BLUETOOTH_DATA_IN_PIPE, EP_TYPE_BULK, PIPE_TOKEN_IN, + DataINEndpoint->EndpointAddress, DataINEndpoint->EndpointSize, PIPE_BANK_SINGLE); + + /* Configure the Bluetooth data OUT pipe */ + Pipe_ConfigurePipe(BLUETOOTH_DATA_OUT_PIPE, EP_TYPE_BULK, PIPE_TOKEN_OUT, + DataOUTEndpoint->EndpointAddress, DataOUTEndpoint->EndpointSize, PIPE_BANK_SINGLE); + + /* Configure the Bluetooth events pipe */ + Pipe_ConfigurePipe(BLUETOOTH_EVENTS_PIPE, EP_TYPE_INTERRUPT, PIPE_TOKEN_IN, + EventsEndpoint->EndpointAddress, EventsEndpoint->EndpointSize, PIPE_BANK_SINGLE); + Pipe_SetInterruptPeriod(EventsEndpoint->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 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_NextInterfaceBluetoothDataEndpoint(void* CurrentDescriptor) +{ + /* Determine the type of the current descriptor */ + if (DESCRIPTOR_TYPE(CurrentDescriptor) == DTYPE_Endpoint) + return DESCRIPTOR_SEARCH_Found; + else if (DESCRIPTOR_TYPE(CurrentDescriptor) == DTYPE_Interface) + return DESCRIPTOR_SEARCH_Fail; + else + return DESCRIPTOR_SEARCH_NotFound; +} +