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author | Dean Camera <dean@fourwalledcubicle.com> | 2010-05-08 03:12:14 +0000 |
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committer | Dean Camera <dean@fourwalledcubicle.com> | 2010-05-08 03:12:14 +0000 |
commit | 071e02c6b6b4837fa9cf0b6d4c749994e02638d7 (patch) | |
tree | 960446788703b69f0bb285450be80c5b3d8cc22c /Demos/Host/LowLevel/JoystickHostWithParser/HIDReport.c | |
parent | e331b531c6e6d93eb0eee42b9002074e8090ad18 (diff) | |
download | lufa-071e02c6b6b4837fa9cf0b6d4c749994e02638d7.tar.gz lufa-071e02c6b6b4837fa9cf0b6d4c749994e02638d7.tar.bz2 lufa-071e02c6b6b4837fa9cf0b6d4c749994e02638d7.zip |
Add svn:eol-style property to source files, so that the line endings are correctly converted to the target system's native end of line style.
Diffstat (limited to 'Demos/Host/LowLevel/JoystickHostWithParser/HIDReport.c')
-rw-r--r-- | Demos/Host/LowLevel/JoystickHostWithParser/HIDReport.c | 220 |
1 files changed, 110 insertions, 110 deletions
diff --git a/Demos/Host/LowLevel/JoystickHostWithParser/HIDReport.c b/Demos/Host/LowLevel/JoystickHostWithParser/HIDReport.c index 1b4fe7e64..cc7c98bfc 100644 --- a/Demos/Host/LowLevel/JoystickHostWithParser/HIDReport.c +++ b/Demos/Host/LowLevel/JoystickHostWithParser/HIDReport.c @@ -1,110 +1,110 @@ -/*
- 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 "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 MouseHostWithParser_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 = (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 true if the item should be stored into the HID report structure, false if it should be discarded
- */
-bool CALLBACK_HIDParser_FilterHIDReportItem(HID_ReportItem_t* 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));
-}
+/* + 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 "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 MouseHostWithParser_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 = (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 true if the item should be stored into the HID report structure, false if it should be discarded + */ +bool CALLBACK_HIDParser_FilterHIDReportItem(HID_ReportItem_t* 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)); +} |