X-Git-Url: http://git.linex4red.de/pub/USBasp.git/blobdiff_plain/e331b531c6e6d93eb0eee42b9002074e8090ad18..071e02c6b6b4837fa9cf0b6d4c749994e02638d7:/Demos/Host/LowLevel/VirtualSerialHost/ConfigDescriptor.c?ds=inline diff --git a/Demos/Host/LowLevel/VirtualSerialHost/ConfigDescriptor.c b/Demos/Host/LowLevel/VirtualSerialHost/ConfigDescriptor.c index 853ad37e0..5707308ad 100644 --- a/Demos/Host/LowLevel/VirtualSerialHost/ConfigDescriptor.c +++ b/Demos/Host/LowLevel/VirtualSerialHost/ConfigDescriptor.c @@ -1,245 +1,245 @@ -/* - 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 CDC interface descriptor containing bulk data IN and OUT endpoints, and an interrupt event endpoint. - * - * \return An error code from the \ref CDCHost_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 CDC control interface from the configuration descriptor */ - if (USB_GetNextDescriptorComp(&CurrConfigBytesRem, &CurrConfigLocation, - DComp_NextCDCControlInterface) != DESCRIPTOR_SEARCH_COMP_Found) - { - /* Descriptor not found, error out */ - return NoCDCInterfaceFound; - } - - /* Get the IN and OUT data and IN notification endpoints for the CDC interface */ - while (FoundEndpoints != ((1 << CDC_NOTIFICATIONPIPE) | (1 << CDC_DATAPIPE_IN) | (1 << CDC_DATAPIPE_OUT))) - { - /* Fetch the next bulk or interrupt endpoint from the current CDC interface */ - if (USB_GetNextDescriptorComp(&CurrConfigBytesRem, &CurrConfigLocation, - DComp_NextCDCDataInterfaceEndpoint) != DESCRIPTOR_SEARCH_COMP_Found) - { - /* Check to see if the control interface's notification pipe has been found, if so search for the data interface */ - if (FoundEndpoints & (1 << CDC_NOTIFICATIONPIPE)) - { - /* Get the next CDC data interface from the configuration descriptor (CDC class has two CDC interfaces) */ - if (USB_GetNextDescriptorComp(&CurrConfigBytesRem, &CurrConfigLocation, - DComp_NextCDCDataInterface) != DESCRIPTOR_SEARCH_COMP_Found) - { - /* Descriptor not found, error out */ - return NoCDCInterfaceFound; - } - } - else - { - /* Clear the found endpoints mask, since any already processed endpoints aren't in the CDC interface we need */ - FoundEndpoints = 0; - - /* Disable any already configured pipes from the invalid CDC interfaces */ - Pipe_SelectPipe(CDC_NOTIFICATIONPIPE); - Pipe_DisablePipe(); - Pipe_SelectPipe(CDC_DATAPIPE_IN); - Pipe_DisablePipe(); - Pipe_SelectPipe(CDC_DATAPIPE_OUT); - Pipe_DisablePipe(); - - /* Get the next CDC control interface from the configuration descriptor (CDC class has two CDC interfaces) */ - if (USB_GetNextDescriptorComp(&CurrConfigBytesRem, &CurrConfigLocation, - DComp_NextCDCControlInterface) != DESCRIPTOR_SEARCH_COMP_Found) - { - /* Descriptor not found, error out */ - return NoCDCInterfaceFound; - } - } - - /* Fetch the next bulk or interrupt endpoint from the current CDC interface */ - if (USB_GetNextDescriptorComp(&CurrConfigBytesRem, &CurrConfigLocation, - DComp_NextCDCDataInterfaceEndpoint) != DESCRIPTOR_SEARCH_COMP_Found) - { - /* Descriptor not found, error out */ - return NoEndpointFound; - } - } - - USB_Descriptor_Endpoint_t* EndpointData = DESCRIPTOR_PCAST(CurrConfigLocation, 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 notification pipe */ - Pipe_ConfigurePipe(CDC_NOTIFICATIONPIPE, EP_TYPE_INTERRUPT, PIPE_TOKEN_IN, - EndpointData->EndpointAddress, EndpointData->EndpointSize, PIPE_BANK_SINGLE); - - Pipe_SetInterruptPeriod(EndpointData->PollingIntervalMS); - - /* Set the flag indicating that the notification pipe has been found */ - FoundEndpoints |= (1 << CDC_NOTIFICATIONPIPE); - } - } - 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(CDC_DATAPIPE_IN, 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 << CDC_DATAPIPE_IN); - } - else - { - /* Configure the data OUT pipe */ - Pipe_ConfigurePipe(CDC_DATAPIPE_OUT, 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 << CDC_DATAPIPE_OUT); - } - } - } - - /* 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 CDC control Class, Subclass and Protocol values. - * - * \return A value from the DSEARCH_Return_ErrorCodes_t enum - */ -uint8_t DComp_NextCDCControlInterface(void* CurrentDescriptor) -{ - if (DESCRIPTOR_TYPE(CurrentDescriptor) == DTYPE_Interface) - { - /* Check the CDC descriptor class, subclass and protocol, break out if correct control interface found */ - if ((DESCRIPTOR_CAST(CurrentDescriptor, USB_Descriptor_Interface_t).Class == CDC_CONTROL_CLASS) && - (DESCRIPTOR_CAST(CurrentDescriptor, USB_Descriptor_Interface_t).SubClass == CDC_CONTROL_SUBCLASS) && - (DESCRIPTOR_CAST(CurrentDescriptor, USB_Descriptor_Interface_t).Protocol == CDC_CONTROL_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 Interface descriptor of the correct CDC data Class, Subclass and Protocol values. - * - * \return A value from the DSEARCH_Return_ErrorCodes_t enum - */ -uint8_t DComp_NextCDCDataInterface(void* CurrentDescriptor) -{ - if (DESCRIPTOR_TYPE(CurrentDescriptor) == DTYPE_Interface) - { - /* Check the CDC descriptor class, subclass and protocol, break out if correct data interface found */ - if ((DESCRIPTOR_CAST(CurrentDescriptor, USB_Descriptor_Interface_t).Class == CDC_DATA_CLASS) && - (DESCRIPTOR_CAST(CurrentDescriptor, USB_Descriptor_Interface_t).SubClass == CDC_DATA_SUBCLASS) && - (DESCRIPTOR_CAST(CurrentDescriptor, USB_Descriptor_Interface_t).Protocol == CDC_DATA_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 bulk IN or OUT endpoint, or interrupt IN endpoint within the current interface, - * aborting the search if another interface descriptor is found before the required endpoint (so that it may be compared - * using a different comparator to determine if it is another CDC class interface). - * - * \return A value from the DSEARCH_Return_ErrorCodes_t enum - */ -uint8_t DComp_NextCDCDataInterfaceEndpoint(void* CurrentDescriptor) -{ - 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; -} +/* + 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 CDC interface descriptor containing bulk data IN and OUT endpoints, and an interrupt event endpoint. + * + * \return An error code from the \ref CDCHost_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 CDC control interface from the configuration descriptor */ + if (USB_GetNextDescriptorComp(&CurrConfigBytesRem, &CurrConfigLocation, + DComp_NextCDCControlInterface) != DESCRIPTOR_SEARCH_COMP_Found) + { + /* Descriptor not found, error out */ + return NoCDCInterfaceFound; + } + + /* Get the IN and OUT data and IN notification endpoints for the CDC interface */ + while (FoundEndpoints != ((1 << CDC_NOTIFICATIONPIPE) | (1 << CDC_DATAPIPE_IN) | (1 << CDC_DATAPIPE_OUT))) + { + /* Fetch the next bulk or interrupt endpoint from the current CDC interface */ + if (USB_GetNextDescriptorComp(&CurrConfigBytesRem, &CurrConfigLocation, + DComp_NextCDCDataInterfaceEndpoint) != DESCRIPTOR_SEARCH_COMP_Found) + { + /* Check to see if the control interface's notification pipe has been found, if so search for the data interface */ + if (FoundEndpoints & (1 << CDC_NOTIFICATIONPIPE)) + { + /* Get the next CDC data interface from the configuration descriptor (CDC class has two CDC interfaces) */ + if (USB_GetNextDescriptorComp(&CurrConfigBytesRem, &CurrConfigLocation, + DComp_NextCDCDataInterface) != DESCRIPTOR_SEARCH_COMP_Found) + { + /* Descriptor not found, error out */ + return NoCDCInterfaceFound; + } + } + else + { + /* Clear the found endpoints mask, since any already processed endpoints aren't in the CDC interface we need */ + FoundEndpoints = 0; + + /* Disable any already configured pipes from the invalid CDC interfaces */ + Pipe_SelectPipe(CDC_NOTIFICATIONPIPE); + Pipe_DisablePipe(); + Pipe_SelectPipe(CDC_DATAPIPE_IN); + Pipe_DisablePipe(); + Pipe_SelectPipe(CDC_DATAPIPE_OUT); + Pipe_DisablePipe(); + + /* Get the next CDC control interface from the configuration descriptor (CDC class has two CDC interfaces) */ + if (USB_GetNextDescriptorComp(&CurrConfigBytesRem, &CurrConfigLocation, + DComp_NextCDCControlInterface) != DESCRIPTOR_SEARCH_COMP_Found) + { + /* Descriptor not found, error out */ + return NoCDCInterfaceFound; + } + } + + /* Fetch the next bulk or interrupt endpoint from the current CDC interface */ + if (USB_GetNextDescriptorComp(&CurrConfigBytesRem, &CurrConfigLocation, + DComp_NextCDCDataInterfaceEndpoint) != DESCRIPTOR_SEARCH_COMP_Found) + { + /* Descriptor not found, error out */ + return NoEndpointFound; + } + } + + USB_Descriptor_Endpoint_t* EndpointData = DESCRIPTOR_PCAST(CurrConfigLocation, 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 notification pipe */ + Pipe_ConfigurePipe(CDC_NOTIFICATIONPIPE, EP_TYPE_INTERRUPT, PIPE_TOKEN_IN, + EndpointData->EndpointAddress, EndpointData->EndpointSize, PIPE_BANK_SINGLE); + + Pipe_SetInterruptPeriod(EndpointData->PollingIntervalMS); + + /* Set the flag indicating that the notification pipe has been found */ + FoundEndpoints |= (1 << CDC_NOTIFICATIONPIPE); + } + } + 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(CDC_DATAPIPE_IN, 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 << CDC_DATAPIPE_IN); + } + else + { + /* Configure the data OUT pipe */ + Pipe_ConfigurePipe(CDC_DATAPIPE_OUT, 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 << CDC_DATAPIPE_OUT); + } + } + } + + /* 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 CDC control Class, Subclass and Protocol values. + * + * \return A value from the DSEARCH_Return_ErrorCodes_t enum + */ +uint8_t DComp_NextCDCControlInterface(void* CurrentDescriptor) +{ + if (DESCRIPTOR_TYPE(CurrentDescriptor) == DTYPE_Interface) + { + /* Check the CDC descriptor class, subclass and protocol, break out if correct control interface found */ + if ((DESCRIPTOR_CAST(CurrentDescriptor, USB_Descriptor_Interface_t).Class == CDC_CONTROL_CLASS) && + (DESCRIPTOR_CAST(CurrentDescriptor, USB_Descriptor_Interface_t).SubClass == CDC_CONTROL_SUBCLASS) && + (DESCRIPTOR_CAST(CurrentDescriptor, USB_Descriptor_Interface_t).Protocol == CDC_CONTROL_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 Interface descriptor of the correct CDC data Class, Subclass and Protocol values. + * + * \return A value from the DSEARCH_Return_ErrorCodes_t enum + */ +uint8_t DComp_NextCDCDataInterface(void* CurrentDescriptor) +{ + if (DESCRIPTOR_TYPE(CurrentDescriptor) == DTYPE_Interface) + { + /* Check the CDC descriptor class, subclass and protocol, break out if correct data interface found */ + if ((DESCRIPTOR_CAST(CurrentDescriptor, USB_Descriptor_Interface_t).Class == CDC_DATA_CLASS) && + (DESCRIPTOR_CAST(CurrentDescriptor, USB_Descriptor_Interface_t).SubClass == CDC_DATA_SUBCLASS) && + (DESCRIPTOR_CAST(CurrentDescriptor, USB_Descriptor_Interface_t).Protocol == CDC_DATA_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 bulk IN or OUT endpoint, or interrupt IN endpoint within the current interface, + * aborting the search if another interface descriptor is found before the required endpoint (so that it may be compared + * using a different comparator to determine if it is another CDC class interface). + * + * \return A value from the DSEARCH_Return_ErrorCodes_t enum + */ +uint8_t DComp_NextCDCDataInterfaceEndpoint(void* CurrentDescriptor) +{ + 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; +}