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Diffstat (limited to 'lib/lufa/Demos/Host/LowLevel/JoystickHostWithParser/HIDReport.c')
| -rw-r--r-- | lib/lufa/Demos/Host/LowLevel/JoystickHostWithParser/HIDReport.c | 111 |
1 files changed, 0 insertions, 111 deletions
diff --git a/lib/lufa/Demos/Host/LowLevel/JoystickHostWithParser/HIDReport.c b/lib/lufa/Demos/Host/LowLevel/JoystickHostWithParser/HIDReport.c deleted file mode 100644 index dadbb395de..0000000000 --- a/lib/lufa/Demos/Host/LowLevel/JoystickHostWithParser/HIDReport.c +++ /dev/null @@ -1,111 +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. -*/ - -#include "HIDReport.h" - -/** Size in bytes of the attached device's HID report descriptor */ -uint16_t HIDReportSize; - -/** Processed HID report descriptor items structure, containing information on each HID report element */ -HID_ReportInfo_t HIDReportInfo; - - -/** Function to read in the HID report descriptor from the attached device, and process it into easy-to-read - * structures via the HID parser routines in the LUFA library. - * - * \return A value from the \ref JoystickHostWithParser_GetHIDReportDataCodes_t enum - */ -uint8_t GetHIDReportData(void) -{ - /* Create a buffer big enough to hold the entire returned HID report */ - uint8_t HIDReportData[HIDReportSize]; - - USB_ControlRequest = (USB_Request_Header_t) - { - .bmRequestType = (REQDIR_DEVICETOHOST | REQTYPE_STANDARD | REQREC_INTERFACE), - .bRequest = REQ_GetDescriptor, - .wValue = (HID_DTYPE_Report << 8), - .wIndex = 0, - .wLength = HIDReportSize, - }; - - /* Select the control pipe for the request transfer */ - Pipe_SelectPipe(PIPE_CONTROLPIPE); - - /* Send control request to retrieve the HID report from the attached device */ - if (USB_Host_SendControlRequest(HIDReportData) != HOST_SENDCONTROL_Successful) - return ParseControlError; - - /* Send the HID report to the parser for processing */ - if (USB_ProcessHIDReport(HIDReportData, HIDReportSize, &HIDReportInfo) != HID_PARSE_Successful) - return ParseError; - - return ParseSuccessful; -} - -/** Callback for the HID Report Parser. This function is called each time the HID report parser is about to store - * an IN, OUT or FEATURE item into the HIDReportInfo structure. To save on RAM, we are able to filter out items - * we aren't interested in (preventing us from being able to extract them later on, but saving on the RAM they would - * have occupied). - * - * \param[in] CurrentItem Pointer to the item the HID report parser is currently working with - * - * \return Boolean \c true if the item should be stored into the HID report structure, \c false if it should be discarded - */ -bool CALLBACK_HIDParser_FilterHIDReportItem(HID_ReportItem_t* const CurrentItem) -{ - bool IsJoystick = false; - - /* Iterate through the item's collection path, until either the root collection node or a collection with the - * Joystick Usage is found - this prevents Mice, which use identical descriptors except for the Mouse usage - * parent node, from being erroneously treated as a joystick - */ - for (HID_CollectionPath_t* CurrPath = CurrentItem->CollectionPath; CurrPath != NULL; CurrPath = CurrPath->Parent) - { - if ((CurrPath->Usage.Page == USAGE_PAGE_GENERIC_DCTRL) && - (CurrPath->Usage.Usage == USAGE_JOYSTICK)) - { - IsJoystick = true; - break; - } - } - - /* If a collection with the joystick usage was not found, indicate that we are not interested in this item */ - if (!IsJoystick) - return false; - - /* Check the attributes of the current joystick item - see if we are interested in it or not; - * only store BUTTON and GENERIC_DESKTOP_CONTROL items into the Processed HID Report - * structure to save RAM and ignore the rest - */ - return ((CurrentItem->Attributes.Usage.Page == USAGE_PAGE_BUTTON) || - (CurrentItem->Attributes.Usage.Page == USAGE_PAGE_GENERIC_DCTRL)); -} - |