X-Git-Url: http://git.linex4red.de/pub/USBasp.git/blobdiff_plain/d1e52660368d34d693131f6aff3c8fd8584162e5..d11ed10c5314c44dc01c06954d1d73d4894cbff8:/LUFA/Drivers/USB/Class/Host/HIDParser.h diff --git a/LUFA/Drivers/USB/Class/Host/HIDParser.h b/LUFA/Drivers/USB/Class/Host/HIDParser.h index 4acce2462..53601ec61 100644 --- a/LUFA/Drivers/USB/Class/Host/HIDParser.h +++ b/LUFA/Drivers/USB/Class/Host/HIDParser.h @@ -1,21 +1,21 @@ /* LUFA Library - Copyright (C) Dean Camera, 2009. + Copyright (C) Dean Camera, 2010. dean [at] fourwalledcubicle [dot] com www.fourwalledcubicle.com */ /* - Copyright 2009 Dean Camera (dean [at] fourwalledcubicle [dot] com) + Copyright 2010 Dean Camera (dean [at] fourwalledcubicle [dot] com) - Permission to use, copy, modify, and distribute this software - and its documentation for any purpose and without fee is hereby - granted, 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 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 @@ -38,19 +38,19 @@ /** \ingroup Group_USB * @defgroup Group_HIDParser HID Report Parser * + * \section Sec_Dependencies Module Source Dependencies + * The following files must be built with any user project that uses this module: + * - LUFA/Drivers/USB/Class/Host/HIDParser.c + * + * \section Module Description * Functions, macros, variables, enums and types related to the parsing of HID class device report descriptors. * * The processed HID report is presented back to the user application as a flat structure containing each report - * item's IN, OUT and FEATURE (if desired) items along with each item's attributes. + * item's IN, OUT and FEATURE items along with each item's attributes. * * This library portion also allows for easy setting and retrieval of data from a HID report, including devices * with multiple reports on the one HID interface. * - * By default, FEATURE reports and IN/OUT reports with constant data are ignored in the HID report when processed - * to save on memory. This can be overridden by defining the HID_ENABLE_FEATURE_PROCESSING or - * HID_INCLUDE_CONSTANT_DATA_ITEMS tokens in the user project makefile, passing them to the compiler via the -D - * switch. - * * @{ */ @@ -62,6 +62,7 @@ #include #include "HIDReportData.h" + #include "../Common/HID.h" #include "../../../../Common/Common.h" @@ -70,15 +71,15 @@ extern "C" { #endif - /* Preprocessor checks and defines: */ + /* Macros: */ #if !defined(HID_STATETABLE_STACK_DEPTH) || defined(__DOXYGEN__) /** Constant indicating the maximum stack depth of the state table. A larger state table * allows for more PUSH/POP report items to be nested, but consumes more memory. By default - * this is set to 3 levels (allowing for two PUSHes to be nested) but this can be overridden by + * this is set to 2 levels (allowing non-nested PUSH items) but this can be overridden by * defining HID_STATETABLE_STACK_DEPTH to another value in the user project makefile, passing the * define to the compiler using the -D compiler switch. */ - #define HID_STATETABLE_STACK_DEPTH 3 + #define HID_STATETABLE_STACK_DEPTH 2 #endif #if !defined(HID_USAGE_STACK_DEPTH) || defined(__DOXYGEN__) @@ -99,29 +100,43 @@ * overridden by defining HID_MAX_COLLECTIONS to another value in the user project makefile, passing * the define to the compiler using the -D compiler switch. */ - #define HID_MAX_COLLECTIONS 5 + #define HID_MAX_COLLECTIONS 10 #endif #if !defined(HID_MAX_REPORTITEMS) || defined(__DOXYGEN__) - /** Constant indicating the maximum number of report items (IN, OUT or FEATURE if enabled) that can be - * processed in the report item descriptor. A large value allows for more report items to be - * processed, but consumes more memory. By default this is set to 30 items, but this can be - * overridden by defining HID_MAX_REPORTITEMS to another value in the user project makefile, passing - * the define to the compiler using the -D compiler switch. + /** Constant indicating the maximum number of report items (IN, OUT or FEATURE) that can be processed + * in the report item descriptor and stored in the user HID Report Info structure. A large value allows + * for more report items to be stored, but consumes more memory. By default this is set to 20 items, + * but this can be overridden by defining HID_MAX_REPORTITEMS to another value in the user project + * makefile, and passing the define to the compiler using the -D compiler switch. + */ + #define HID_MAX_REPORTITEMS 20 + #endif + + #if !defined(HID_MAX_REPORT_IDS) || defined(__DOXYGEN__) + /** Constant indicating the maximum number of unique report IDs that can be processed in the report item + * descriptor for the report size information array in the user HID Report Info structure. A large value + * allows for more report ID report sizes to be stored, but consumes more memory. By default this is set + * to 5 items, but this can be overridden by defining HID_MAX_REPORT_IDS to another value in the user project + * makefile, and passing the define to the compiler using the -D compiler switch. Note that IN, OUT and FEATURE + * items sharing the same report ID consume only one size item in the array. */ - #define HID_MAX_REPORTITEMS 30 + #define HID_MAX_REPORT_IDS 10 #endif + /** Returns the value a given HID report item (once its value has been fetched via \ref USB_GetHIDReportItemInfo()) + * left-aligned to the given data type. This allows for signed data to be interpreted correctly, by shifting the data + * leftwards until the data's sign bit is in the correct position. + * + * \param[in] reportitem HID Report Item whose retrieved value is to be aligned + * \param[in] type Data type to align the HID report item's value to + * + * \return Left-aligned data of the given report item's pre-retrived value for the given datatype + */ + #define HID_ALIGN_DATA(reportitem, type) ((type)(reportitem->Value << (sizeof(type) - reportitem->Attributes.BitSize))) + /* Public Interface - May be used in end-application: */ - /* Enums: */ - /** Enum for indicating what type of report item an entry in a \ref HID_ReportInfo_t ReportItem array is */ - enum HID_ReportItemTypes_t - { - REPORT_ITEM_TYPE_In = 0, /**< Indicates that the item is an IN report type. */ - REPORT_ITEM_TYPE_Out = 1, /**< Indicates that the item is an OUT report type. */ - REPORT_ITEM_TYPE_Feature = 2, /**< Indicates that the item is a FEATURE report type. */ - }; - + /* Enums: */ /** Enum for the possible error codes in the return value of the \ref USB_ProcessHIDReport() function */ enum HID_Parse_ErrorCodes_t { @@ -129,9 +144,11 @@ HID_PARSE_HIDStackOverflow = 1, /**< More than \ref HID_STATETABLE_STACK_DEPTH nested PUSHes in the report. */ HID_PARSE_HIDStackUnderflow = 2, /**< A POP was found when the state table stack was empty. */ HID_PARSE_InsufficientReportItems = 3, /**< More than \ref HID_MAX_REPORTITEMS report items in the report. */ - HID_PARSE_UnexpectedEndCollection = 4, /**< END COLLECTION found without matching COLLECTION item. */ + HID_PARSE_UnexpectedEndCollection = 4, /**< An END COLLECTION item found without matching COLLECTION item. */ HID_PARSE_InsufficientCollectionPaths = 5, /**< More than \ref HID_MAX_COLLECTIONS collections in the report. */ - HID_PARSE_UsageStackOverflow = 6, /**< More than \ref HID_USAGE_STACK_DEPTH usages listed in a row. */ + HID_PARSE_UsageListOverflow = 6, /**< More than \ref HID_USAGE_STACK_DEPTH usages listed in a row. */ + HID_PARSE_InsufficientReportIDItems = 7, /**< More than \ref HID_MAX_REPORT_IDS report IDs in the device. */ + HID_PARSE_NoUnfilteredReportItems = 8, /**< All report items from the device were filtered by the filtering callback routine. */ }; /* Type Defines: */ @@ -154,7 +171,6 @@ { uint16_t Page; /**< Usage page of the report item. */ uint16_t Usage; /**< Usage of the report item. */ - HID_MinMax_t MinMax; /**< Usage minimum and maximum of the report item. */ } HID_Usage_t; /** Type define for a COLLECTION object. Contains the collection attributes and a reference to the @@ -182,65 +198,113 @@ typedef struct { uint16_t BitOffset; /**< Bit offset in the IN, OUT or FEATURE report of the item. */ - uint8_t ItemType; /**< Report item type, a value in HID_Types_t. */ + uint8_t ItemType; /**< Report item type, a value in HID_ReportItemTypes_t. */ uint16_t ItemFlags; /**< Item data flags, such as constant/variable, etc. */ uint8_t ReportID; /**< Report ID this item belongs to, or 0x00 if device has only one report */ HID_CollectionPath_t* CollectionPath; /**< Collection path of the item. */ HID_ReportItem_Attributes_t Attributes; /**< Report item attributes. */ - uint32_t Value; /**< Current value of the report item. */ + uint32_t Value; /**< Current value of the report item - use \ref HID_ALIGN_DATA() when processing + * a retrieved value so that it is aligned to a specific type. + */ + uint32_t PreviousValue; /**< Previous value of the report item. */ } HID_ReportItem_t; + + /** Type define for a report item size information structure */ + typedef struct + { + uint8_t ReportID; /** Report ID of the report within the HID interface */ + uint8_t ReportSizeBits[3]; /** Total number of bits in each report type for the given Report ID, + * indexed by the \ref HID_ReportItemTypes_t enum + */ + } HID_ReportSizeInfo_t; /** Type define for a complete processed HID report, including all report item data and collections. */ typedef struct { uint8_t TotalReportItems; /**< Total number of report items stored in the - * ReportItems array. */ - + * ReportItems array. + */ HID_ReportItem_t ReportItems[HID_MAX_REPORTITEMS]; /**< Report items array, including - * all IN, OUT and FEATURE items. */ - + * all IN, OUT and FEATURE items. + */ HID_CollectionPath_t CollectionPaths[HID_MAX_COLLECTIONS]; /**< All collection items, referenced - * by the report items. */ + * by the report items. + */ + uint8_t TotalDeviceReports; /**< Number of reports within the HID interface */ + HID_ReportSizeInfo_t ReportIDSizes[HID_MAX_REPORT_IDS]; /**< Report sizes for each report in the interface */ + uint16_t LargestReportSizeBits; /**< Largest report that the attached device will generate, in bits */ + bool UsingReportIDs; /**< Indicates if the device has at least one REPORT ID + * element in its HID report descriptor. + */ } HID_ReportInfo_t; /* Function Prototypes: */ /** Function to process a given HID report returned from an attached device, and store it into a given * \ref HID_ReportInfo_t structure. * - * \param ReportData Buffer containing the device's HID report table - * \param ReportSize Size in bytes of the HID report table - * \param ParserData Pointer to a \ref HID_ReportInfo_t instance for the parser output + * \param[in] ReportData Buffer containing the device's HID report table + * \param[in] ReportSize Size in bytes of the HID report table + * \param[out] ParserData Pointer to a \ref HID_ReportInfo_t instance for the parser output * * \return A value in the \ref HID_Parse_ErrorCodes_t enum */ uint8_t USB_ProcessHIDReport(const uint8_t* ReportData, uint16_t ReportSize, HID_ReportInfo_t* const ParserData) - ATTR_NON_NULL_PTR_ARG(1, 3); + ATTR_NON_NULL_PTR_ARG(1) ATTR_NON_NULL_PTR_ARG(3); /** Extracts the given report item's value out of the given HID report and places it into the Value * member of the report item's \ref HID_ReportItem_t structure. * - * \param ReportData Buffer containing an IN or FEATURE report from an attached device - * \param ReportItem Pointer to the report item of interest in a \ref HID_ReportInfo_t ReportItem array + * When called, this copies the report item's Value element to it's PreviousValue element for easy + * checking to see if an item's value has changed before processing a report. + * + * \param[in] ReportData Buffer containing an IN or FEATURE report from an attached device + * \param[in,out] ReportItem Pointer to the report item of interest in a \ref HID_ReportInfo_t ReportItem array * * \returns Boolean true if the item to retrieve was located in the given report, false otherwise */ bool USB_GetHIDReportItemInfo(const uint8_t* ReportData, HID_ReportItem_t* const ReportItem) - ATTR_NON_NULL_PTR_ARG(1, 2); + ATTR_NON_NULL_PTR_ARG(1) ATTR_NON_NULL_PTR_ARG(2); /** Retrieves the given report item's value out of the Value member of the report item's * \ref HID_ReportItem_t structure and places it into the correct position in the HID report * buffer. The report buffer is assumed to have the appropriate bits cleared before calling * this function (i.e., the buffer should be explicitly cleared before report values are added). * - * If the device has multiple HID reports, the report ID is set to the report ID of the given item. + * When called, this copies the report item's Value element to it's PreviousValue element for easy + * checking to see if an item's value has changed before sending a report. + * + * If the device has multiple HID reports, the first byte in the report is set to the report ID of the given item. + * + * \param[out] ReportData Buffer holding the current OUT or FEATURE report data + * \param[in] ReportItem Pointer to the report item of interest in a \ref HID_ReportInfo_t ReportItem array + */ + void USB_SetHIDReportItemInfo(uint8_t* ReportData, HID_ReportItem_t* const ReportItem) + ATTR_NON_NULL_PTR_ARG(1) ATTR_NON_NULL_PTR_ARG(2); + + /** Retrieves the size of a given HID report in bytes from it's Report ID. + * + * \param[in] ParserData Pointer to a \ref HID_ReportInfo_t instance containing the parser output + * \param[in] ReportID Report ID of the report whose size is to be retrieved + * \param[in] ReportType Type of the report whose size is to be determined, a valued from the + * \ref HID_ReportItemTypes_t enum + * + * \return Size of the report in bytes, or 0 if the report does not exist + */ + uint16_t USB_GetHIDReportSize(HID_ReportInfo_t* const ParserData, const uint8_t ReportID, + const uint8_t ReportType) ATTR_CONST ATTR_NON_NULL_PTR_ARG(1); + + /** Callback routine for the HID Report Parser. This callback must be implemented by the user code when + * the parser is used, to determine what report IN, OUT and FEATURE item's information is stored into the user + * HID_ReportInfo_t structure. This can be used to filter only those items the application will be using, so that + * no RAM is wasted storing the attributes for report items which will never be referenced by the application. + * + * \param[in] CurrentItem Pointer to the current report item for user checking * - * \param ReportData Buffer holding the current OUT report data - * \param ReportItem Pointer to the report item of interest in a \ref HID_ReportInfo_t ReportItem array + * \return Boolean true if the item should be stored into the HID_ReportInfo_t structure, false if it should be ignored */ - void USB_SetHIDReportItemInfo(uint8_t* ReportData, const HID_ReportItem_t* ReportItem) - ATTR_NON_NULL_PTR_ARG(1, 2); + bool CALLBACK_HIDParser_FilterHIDReportItem(HID_ReportItem_t* CurrentItem); /* Private Interface - For use in library only: */ #if !defined(__DOXYGEN__)