X-Git-Url: http://git.linex4red.de/pub/USBasp.git/blobdiff_plain/d1e52660368d34d693131f6aff3c8fd8584162e5..1190652c0b210fe24320f8da9bfd5a0e169111d8:/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..8d3fbf212 100644 --- a/LUFA/Drivers/USB/Class/Host/HIDParser.h +++ b/LUFA/Drivers/USB/Class/Host/HIDParser.h @@ -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. - * * @{ */ @@ -74,11 +74,11 @@ #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__) @@ -103,13 +103,13 @@ #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, passing the define to the compiler using the -D compiler switch. */ - #define HID_MAX_REPORTITEMS 30 + #define HID_MAX_REPORTITEMS 20 #endif /* Public Interface - May be used in end-application: */ @@ -129,7 +129,7 @@ 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. */ }; @@ -196,22 +196,26 @@ 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. + */ + bool UsingMultipleReports; /**< 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 */ @@ -221,8 +225,8 @@ /** 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 + * \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 */ @@ -234,13 +238,24 @@ * 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. + * If the device has multiple HID reports, the first byte in the report is set to the report ID of the given item. * - * \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 + * \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, const HID_ReportItem_t* ReportItem) ATTR_NON_NULL_PTR_ARG(1, 2); + + /** 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 CurrentItemAttributes Pointer to the current report item attributes for user checking + * + * \return Boolean true if the item should be stored into the HID_ReportInfo_t structure, false if it should be ignored + */ + bool CALLBACK_HIDParser_FilterHIDReportItem(HID_ReportItem_Attributes_t* CurrentItemAttributes); /* Private Interface - For use in library only: */ #if !defined(__DOXYGEN__)