X-Git-Url: http://git.linex4red.de/pub/USBasp.git/blobdiff_plain/071e02c6b6b4837fa9cf0b6d4c749994e02638d7..a9abe1fdea5ccf67aaccab6fdde300d6fcf2d15a:/Demos/Host/LowLevel/JoystickHostWithParser/ConfigDescriptor.c?ds=inline diff --git a/Demos/Host/LowLevel/JoystickHostWithParser/ConfigDescriptor.c b/Demos/Host/LowLevel/JoystickHostWithParser/ConfigDescriptor.c index 80caeb656..4f7a0d61b 100644 --- a/Demos/Host/LowLevel/JoystickHostWithParser/ConfigDescriptor.c +++ b/Demos/Host/LowLevel/JoystickHostWithParser/ConfigDescriptor.c @@ -1,21 +1,21 @@ /* LUFA Library - Copyright (C) Dean Camera, 2010. - + Copyright (C) Dean Camera, 2012. + dean [at] fourwalledcubicle [dot] com - www.fourwalledcubicle.com + www.lufa-lib.org */ /* - Copyright 2010 Dean Camera (dean [at] fourwalledcubicle [dot] com) + Copyright 2012 Dean Camera (dean [at] fourwalledcubicle [dot] com) - Permission to use, copy, modify, distribute, and sell this + 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 + 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 + 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 @@ -51,6 +51,10 @@ uint8_t ProcessConfigurationDescriptor(void) void* CurrConfigLocation = ConfigDescriptorData; uint16_t CurrConfigBytesRem; + USB_Descriptor_Interface_t* HIDInterface = NULL; + USB_HID_Descriptor_HID_t* HIDDescriptor = 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))) { @@ -64,39 +68,54 @@ uint8_t ProcessConfigurationDescriptor(void) return ControlError; } - /* Get the joystick interface from the configuration descriptor */ - if (USB_GetNextDescriptorComp(&CurrConfigBytesRem, &CurrConfigLocation, - DComp_NextJoystickInterface) != DESCRIPTOR_SEARCH_COMP_Found) - { - /* Descriptor not found, error out */ - return NoHIDInterfaceFound; - } - - /* Get the joystick interface's HID descriptor */ - if (USB_GetNextDescriptorComp(&CurrConfigBytesRem, &CurrConfigLocation, - DComp_NextHID) != DESCRIPTOR_SEARCH_COMP_Found) + while (!(DataINEndpoint)) { - /* Descriptor not found, error out */ - return NoHIDDescriptorFound; - } + /* 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_NextJoystickInterfaceDataEndpoint) != DESCRIPTOR_SEARCH_COMP_Found) + { + /* Get the next HID interface from the configuration descriptor */ + if (USB_GetNextDescriptorComp(&CurrConfigBytesRem, &CurrConfigLocation, + DComp_NextJoystickInterface) != DESCRIPTOR_SEARCH_COMP_Found) + { + /* Descriptor not found, error out */ + return NoCompatibleInterfaceFound; + } - /* Save the HID report size for later use */ - HIDReportSize = DESCRIPTOR_CAST(CurrConfigLocation, USB_Descriptor_HID_t).HIDReportLength; - - /* Get the joystick interface's data endpoint descriptor */ - if (USB_GetNextDescriptorComp(&CurrConfigBytesRem, &CurrConfigLocation, - DComp_NextJoystickInterfaceDataEndpoint) != DESCRIPTOR_SEARCH_COMP_Found) - { - /* Descriptor not found, error out */ - return NoEndpointFound; + /* Save the interface in case we need to refer back to it later */ + HIDInterface = DESCRIPTOR_PCAST(CurrConfigLocation, USB_Descriptor_Interface_t); + + /* Get the HID descriptor from the configuration descriptor */ + if (USB_GetNextDescriptorComp(&CurrConfigBytesRem, &CurrConfigLocation, + DComp_NextHID) != DESCRIPTOR_SEARCH_COMP_Found) + { + /* Descriptor not found, error out */ + return NoCompatibleInterfaceFound; + } + + /* Save the HID descriptor for later use */ + HIDDescriptor = DESCRIPTOR_PCAST(CurrConfigLocation, USB_HID_Descriptor_HID_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; } - - /* Retrieve the endpoint address from the endpoint descriptor */ - USB_Descriptor_Endpoint_t* EndpointData = DESCRIPTOR_PCAST(CurrConfigLocation, USB_Descriptor_Endpoint_t); - /* Configure the joystick data pipe */ - Pipe_ConfigurePipe(JOYSTICK_DATAPIPE, EP_TYPE_INTERRUPT, PIPE_TOKEN_IN, - EndpointData->EndpointAddress, EndpointData->EndpointSize, PIPE_BANK_SINGLE); + /* Configure the HID data IN pipe */ + Pipe_ConfigurePipe(JOYSTICK_DATA_IN_PIPE, EP_TYPE_INTERRUPT, PIPE_TOKEN_IN, + DataINEndpoint->EndpointAddress, DataINEndpoint->EndpointSize, PIPE_BANK_SINGLE); + Pipe_SetInterruptPeriod(DataINEndpoint->PollingIntervalMS); + + /* Get the HID report size from the HID report descriptor */ + HIDReportSize = HIDDescriptor->HIDReportLength; /* Valid data found, return success */ return SuccessfulConfigRead; @@ -112,16 +131,19 @@ uint8_t ProcessConfigurationDescriptor(void) */ uint8_t DComp_NextJoystickInterface(void* CurrentDescriptor) { - if (DESCRIPTOR_TYPE(CurrentDescriptor) == DTYPE_Interface) + USB_Descriptor_Header_t* Header = DESCRIPTOR_PCAST(CurrentDescriptor, USB_Descriptor_Header_t); + + if (Header->Type == 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 == JOYSTICK_CLASS) && - (DESCRIPTOR_CAST(CurrentDescriptor, USB_Descriptor_Interface_t).Protocol == JOYSTICK_PROTOCOL)) + USB_Descriptor_Interface_t* Interface = DESCRIPTOR_PCAST(CurrentDescriptor, USB_Descriptor_Interface_t); + + /* Check the HID descriptor class, break out if correct class interface found */ + if ((Interface->Class == HID_CSCP_HIDClass)) { return DESCRIPTOR_SEARCH_Found; } } - + return DESCRIPTOR_SEARCH_NotFound; } @@ -129,24 +151,21 @@ uint8_t DComp_NextJoystickInterface(void* CurrentDescriptor) * 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 IN Endpoint descriptor inside the current interface descriptor, - * aborting the search if another interface descriptor is found before the required endpoint. + * 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_NextJoystickInterfaceDataEndpoint(void* CurrentDescriptor) { - if (DESCRIPTOR_TYPE(CurrentDescriptor) == DTYPE_Endpoint) - { - if (DESCRIPTOR_CAST(CurrentDescriptor, USB_Descriptor_Endpoint_t).EndpointAddress & ENDPOINT_DESCRIPTOR_DIR_IN) - return DESCRIPTOR_SEARCH_Found; - } - else if (DESCRIPTOR_TYPE(CurrentDescriptor) == DTYPE_Interface) - { - return DESCRIPTOR_SEARCH_Fail; - } + USB_Descriptor_Header_t* Header = DESCRIPTOR_PCAST(CurrentDescriptor, USB_Descriptor_Header_t); - return DESCRIPTOR_SEARCH_NotFound; + if (Header->Type == DTYPE_Endpoint) + return DESCRIPTOR_SEARCH_Found; + else if (Header->Type == DTYPE_Interface) + return DESCRIPTOR_SEARCH_Fail; + else + return DESCRIPTOR_SEARCH_NotFound; } /** Descriptor comparator function. This comparator function is can be called while processing an attached USB device's @@ -159,8 +178,11 @@ uint8_t DComp_NextJoystickInterfaceDataEndpoint(void* CurrentDescriptor) */ uint8_t DComp_NextHID(void* CurrentDescriptor) { - if (DESCRIPTOR_TYPE(CurrentDescriptor) == DTYPE_HID) + USB_Descriptor_Header_t* Header = DESCRIPTOR_PCAST(CurrentDescriptor, USB_Descriptor_Header_t); + + if (Header->Type == HID_DTYPE_HID) return DESCRIPTOR_SEARCH_Found; else - return DESCRIPTOR_SEARCH_NotFound; + return DESCRIPTOR_SEARCH_NotFound; } +