Add user-filtering to the HID report parser, so that the user code can decide which...

diff --git a/Demos/Host/LowLevel/KeyboardHostWithParser/HIDReport.c b/Demos/Host/LowLevel/KeyboardHostWithParser/HIDReport.c
index 6ac1f5a..2623878 100644 (file)
--- a/Demos/Host/LowLevel/KeyboardHostWithParser/HIDReport.c
+++ b/Demos/Host/LowLevel/KeyboardHostWithParser/HIDReport.c
@@ -70,3 +70,25 @@ uint8_t GetHIDReportData(void)
        return ParseSuccessful;\r
 }\r
 \r
        return ParseSuccessful;\r
 }\r
 \r

+/** Callback for the HID Report Parser. This function is called each time the HID report parser is about to store\r
+ *  an IN, OUT or FEATURE item into the HIDReportInfo structure. To save on RAM, we are able to filter out items\r
+ *  we aren't interested in (preventing us from being able to extract them later on, but saving on the RAM they would\r
+ *  have occupied).\r
+ *\r
+ *  \param CurrentItemAttributes  Pointer to the attrbutes of the item the HID report parser is currently working with\r
+ *\r
+ *  \return Boolean true if the item should be stored into the HID report structure, false if it should be discarded\r
+ */\r
+bool CALLBACK_HIDParser_FilterHIDReportItem(HID_ReportItem_Attributes_t* CurrentItemAttributes)\r
+{\r
+       /* Check the attributes of the current item - see if we are interested in it or not */\r
+       if (CurrentItemAttributes->Usage.Page == USAGE_PAGE_KEYBOARD)\r
+       {\r
+               /* Only store KEYBOARD usage page items into the Processed HID Report structure to save RAM */\r
+               return true;\r
+       }\r
+       else\r
+       {\r
+               return false;\r
+       }\r
+}\r

diff --git a/Demos/Host/LowLevel/KeyboardHostWithParser/HIDReport.h b/Demos/Host/LowLevel/KeyboardHostWithParser/HIDReport.h
index a141ffb..974cf72 100644 (file)
--- a/Demos/Host/LowLevel/KeyboardHostWithParser/HIDReport.h
+++ b/Demos/Host/LowLevel/KeyboardHostWithParser/HIDReport.h
@@ -76,5 +76,7 @@
 \r
        /* Function Prototypes: */\r
                uint8_t GetHIDReportData(void);\r
 \r
        /* Function Prototypes: */\r
                uint8_t GetHIDReportData(void);\r

+\r
+               bool CALLBACK_HIDParser_FilterHIDReportItem(HID_ReportItem_Attributes_t* CurrentItemAttributes);\r

                \r
 #endif\r
                \r
 #endif\r

diff --git a/Demos/Host/LowLevel/MouseHostWithParser/HIDReport.c b/Demos/Host/LowLevel/MouseHostWithParser/HIDReport.c
index 4d89590..41abcb2 100644 (file)
--- a/Demos/Host/LowLevel/MouseHostWithParser/HIDReport.c
+++ b/Demos/Host/LowLevel/MouseHostWithParser/HIDReport.c
@@ -69,3 +69,27 @@ uint8_t GetHIDReportData(void)
        \r
        return ParseSuccessful;\r
 }\r
        \r
        return ParseSuccessful;\r
 }\r

+\r
+/** Callback for the HID Report Parser. This function is called each time the HID report parser is about to store\r
+ *  an IN, OUT or FEATURE item into the HIDReportInfo structure. To save on RAM, we are able to filter out items\r
+ *  we aren't interested in (preventing us from being able to extract them later on, but saving on the RAM they would\r
+ *  have occupied).\r
+ *\r
+ *  \param CurrentItemAttributes  Pointer to the attrbutes of the item the HID report parser is currently working with\r
+ *\r
+ *  \return Boolean true if the item should be stored into the HID report structure, false if it should be discarded\r
+ */\r
+bool CALLBACK_HIDParser_FilterHIDReportItem(HID_ReportItem_Attributes_t* CurrentItemAttributes)\r
+{\r
+       /* Check the attributes of the current item - see if we are interested in it or not */\r
+       if ((CurrentItemAttributes->Usage.Page == USAGE_PAGE_BUTTON) ||\r
+           (CurrentItemAttributes->Usage.Page == USAGE_PAGE_GENERIC_DCTRL))\r
+       {\r
+               /* Only store BUTTON and GENERIC_DESKTOP_CONTROL items into the Processed HID Report structure to save RAM */\r
+               return true;\r
+       }\r
+       else\r
+       {\r
+               return false;\r
+       }\r
+}\r

diff --git a/Demos/Host/LowLevel/MouseHostWithParser/HIDReport.h b/Demos/Host/LowLevel/MouseHostWithParser/HIDReport.h
index f5429f0..ae6871c 100644 (file)
--- a/Demos/Host/LowLevel/MouseHostWithParser/HIDReport.h
+++ b/Demos/Host/LowLevel/MouseHostWithParser/HIDReport.h
@@ -86,4 +86,6 @@
        /* Function Prototypes: */\r
                uint8_t GetHIDReportData(void);\r
                \r
        /* Function Prototypes: */\r
                uint8_t GetHIDReportData(void);\r
                \r

+               bool CALLBACK_HIDParser_FilterHIDReportItem(HID_ReportItem_Attributes_t* CurrentItemAttributes);\r
+               \r

 #endif\r
 #endif\r

diff --git a/LUFA/Drivers/USB/Class/Host/HIDParser.c b/LUFA/Drivers/USB/Class/Host/HIDParser.c
index 241e17a..accb8f3 100644 (file)
--- a/LUFA/Drivers/USB/Class/Host/HIDParser.c
+++ b/LUFA/Drivers/USB/Class/Host/HIDParser.c
@@ -35,16 +35,14 @@
 \r
 uint8_t USB_ProcessHIDReport(const uint8_t* ReportData, uint16_t ReportSize, HID_ReportInfo_t* const ParserData)\r
 {\r
 \r
 uint8_t USB_ProcessHIDReport(const uint8_t* ReportData, uint16_t ReportSize, HID_ReportInfo_t* const ParserData)\r
 {\r

-       HID_StateTable_t  StateTable[HID_STATETABLE_STACK_DEPTH];\r
-       HID_StateTable_t* CurrStateTable          = &StateTable[0];\r
-       uint16_t          UsageStack[HID_USAGE_STACK_DEPTH];\r
-       uint8_t           UsageStackSize          = 0;\r
-       uint16_t          BitOffsetIn             = 0;\r
-       uint16_t          BitOffsetOut            = 0;\r
-#if defined(HID_ENABLE_FEATURE_PROCESSING)\r
-       uint16_t          BitOffsetFeature        = 0;\r
-#endif\r
+       HID_StateTable_t      StateTable[HID_STATETABLE_STACK_DEPTH];\r
+       HID_StateTable_t*     CurrStateTable          = &StateTable[0];\r

        HID_CollectionPath_t* CurrCollectionPath  = NULL;\r
        HID_CollectionPath_t* CurrCollectionPath  = NULL;\r

+       uint16_t              UsageStack[HID_USAGE_STACK_DEPTH];\r
+       uint8_t               UsageStackSize          = 0;\r
+       uint16_t              BitOffsetIn             = 0;\r
+       uint16_t              BitOffsetOut            = 0;\r
+       uint16_t              BitOffsetFeature        = 0;\r

 \r
        ParserData->TotalReportItems     = 0;\r
        ParserData->UsingMultipleReports = false;\r
 \r
        ParserData->TotalReportItems     = 0;\r
        ParserData->UsingMultipleReports = false;\r


@@ -131,10 +129,7 @@ uint8_t USB_ProcessHIDReport(const uint8_t* ReportData, uint16_t ReportSize, HID
                                ParserData->UsingMultipleReports = true;\r
                                BitOffsetIn      = 0;\r
                                BitOffsetOut     = 0;\r
                                ParserData->UsingMultipleReports = true;\r
                                BitOffsetIn      = 0;\r
                                BitOffsetOut     = 0;\r

-\r
-                               #if defined(HID_ENABLE_FEATURE_PROCESSING)\r

                                BitOffsetFeature = 0;\r
                                BitOffsetFeature = 0;\r

-                               #endif\r

                                break;\r
                        case (TYPE_LOCAL | TAG_LOCAL_USAGE):\r
                                if (UsageStackSize == HID_USAGE_STACK_DEPTH)\r
                                break;\r
                        case (TYPE_LOCAL | TAG_LOCAL_USAGE):\r
                                if (UsageStackSize == HID_USAGE_STACK_DEPTH)\r


@@ -197,27 +192,22 @@ uint8_t USB_ProcessHIDReport(const uint8_t* ReportData, uint16_t ReportSize, HID
                                break;\r
                        case (TYPE_MAIN | TAG_MAIN_INPUT):\r
                        case (TYPE_MAIN | TAG_MAIN_OUTPUT):\r
                                break;\r
                        case (TYPE_MAIN | TAG_MAIN_INPUT):\r
                        case (TYPE_MAIN | TAG_MAIN_OUTPUT):\r

-#if defined(HID_ENABLE_FEATURE_PROCESSING)\r

                        case (TYPE_MAIN | TAG_MAIN_FEATURE):\r
                        case (TYPE_MAIN | TAG_MAIN_FEATURE):\r

-#endif\r

                                for (uint8_t ReportItemNum = 0; ReportItemNum < CurrStateTable->ReportCount; ReportItemNum++)\r
                                {\r
                                for (uint8_t ReportItemNum = 0; ReportItemNum < CurrStateTable->ReportCount; ReportItemNum++)\r
                                {\r

-                                       HID_ReportItem_t* CurrReportItem = &ParserData->ReportItems[ParserData->TotalReportItems];\r
-                               \r
-                                       if (ParserData->TotalReportItems == HID_MAX_REPORTITEMS)\r
-                                         return HID_PARSE_InsufficientReportItems;\r
+                                       HID_ReportItem_t NewReportItem;\r

                                  \r
                                  \r

-                                       memcpy(&CurrReportItem->Attributes,\r
+                                       memcpy(&NewReportItem.Attributes,\r

                                               &CurrStateTable->Attributes,\r
                                               sizeof(HID_ReportItem_Attributes_t));\r
 \r
                                               &CurrStateTable->Attributes,\r
                                               sizeof(HID_ReportItem_Attributes_t));\r
 \r

-                                       CurrReportItem->ItemFlags      = ReportItemData;\r
-                                       CurrReportItem->CollectionPath = CurrCollectionPath;\r
-                                       CurrReportItem->ReportID       = CurrStateTable->ReportID;\r
+                                       NewReportItem.ItemFlags      = ReportItemData;\r
+                                       NewReportItem.CollectionPath = CurrCollectionPath;\r
+                                       NewReportItem.ReportID       = CurrStateTable->ReportID;\r

 \r
                                        if (UsageStackSize)\r
                                        {\r
 \r
                                        if (UsageStackSize)\r
                                        {\r

-                                               CurrReportItem->Attributes.Usage.Usage = UsageStack[0];\r
+                                               NewReportItem.Attributes.Usage.Usage = UsageStack[0];\r

 \r
                                                for (uint8_t i = 0; i < UsageStackSize; i++)\r
                                                  UsageStack[i] = UsageStack[i + 1];\r
 \r
                                                for (uint8_t i = 0; i < UsageStackSize; i++)\r
                                                  UsageStack[i] = UsageStack[i + 1];\r


@@ -226,42 +216,41 @@ uint8_t USB_ProcessHIDReport(const uint8_t* ReportData, uint16_t ReportSize, HID
                                        }\r
                                        else\r
                                        {\r
                                        }\r
                                        else\r
                                        {\r

-                                               CurrReportItem->Attributes.Usage.Usage = 0;\r
+                                               NewReportItem.Attributes.Usage.Usage = 0;\r

                                        }\r
                                                                                        \r
                                        switch (HIDReportItem & TAG_MASK)\r
                                        {\r
                                                case TAG_MAIN_INPUT:\r
                                        }\r
                                                                                        \r
                                        switch (HIDReportItem & TAG_MASK)\r
                                        {\r
                                                case TAG_MAIN_INPUT:\r

-                                                       CurrReportItem->ItemType  = REPORT_ITEM_TYPE_In;\r
-                                                       CurrReportItem->BitOffset = BitOffsetIn;\r
+                                                       NewReportItem.ItemType  = REPORT_ITEM_TYPE_In;\r
+                                                       NewReportItem.BitOffset = BitOffsetIn;\r

                                                                \r
                                                        BitOffsetIn += CurrStateTable->Attributes.BitSize;\r
                                                                \r
                                                        BitOffsetIn += CurrStateTable->Attributes.BitSize;\r

-                                                       \r

                                                        break;\r
                                                case TAG_MAIN_OUTPUT:\r
                                                        break;\r
                                                case TAG_MAIN_OUTPUT:\r

-                                                       CurrReportItem->ItemType  = REPORT_ITEM_TYPE_Out;\r
-                                                       CurrReportItem->BitOffset = BitOffsetOut;\r
+                                                       NewReportItem.ItemType  = REPORT_ITEM_TYPE_Out;\r
+                                                       NewReportItem.BitOffset = BitOffsetOut;\r

                                                                \r
                                                        BitOffsetOut += CurrStateTable->Attributes.BitSize;\r
                                                                \r
                                                        BitOffsetOut += CurrStateTable->Attributes.BitSize;\r

-                                                       \r

                                                        break;\r
                                                        break;\r

-#if defined(HID_ENABLE_FEATURE_PROCESSING)\r

                                                case TAG_MAIN_FEATURE:\r
                                                case TAG_MAIN_FEATURE:\r

-                                                       CurrReportItem->ItemType  = REPORT_ITEM_TYPE_Feature;                                           \r
-                                                       CurrReportItem->BitOffset = BitOffsetFeature;\r
+                                                       NewReportItem.ItemType  = REPORT_ITEM_TYPE_Feature;                                             \r
+                                                       NewReportItem.BitOffset = BitOffsetFeature;\r

                                                                \r
                                                                \r

-                                                       BitOffsetFeature += CurrStateTable->Attributes.BitSize;         \r
-\r
+                                                       BitOffsetFeature += CurrStateTable->Attributes.BitSize;\r

                                                        break;\r
                                                        break;\r

-#endif\r

                                        }\r
                                        }\r

+\r
+                                       if (!(ReportItemData & IOF_CONSTANT) && CALLBACK_HIDParser_FilterHIDReportItem(&CurrStateTable->Attributes))\r
+                                       {                                       \r
+                                               if (ParserData->TotalReportItems == HID_MAX_REPORTITEMS)\r
+                                                 return HID_PARSE_InsufficientReportItems;\r

                                        \r
                                        \r

-#if defined(HID_INCLUDE_CONSTANT_DATA_ITEMS)\r
-                                       ParserData->TotalReportItems++;\r
-#else\r
-                                       if (!(ReportItemData & IOF_CONSTANT))\r
-                                         ParserData->TotalReportItems++;\r
-#endif\r
+                                               memcpy(&ParserData->ReportItems[ParserData->TotalReportItems],\r
+                                                      &NewReportItem, sizeof(HID_ReportItem_t));\r
+                                       \r
+                                               ParserData->TotalReportItems++;\r
+                                       }\r

                                }\r
                                \r
                                UsageStackSize = 0;\r
                                }\r
                                \r
                                UsageStackSize = 0;\r

diff --git a/LUFA/Drivers/USB/Class/Host/HIDParser.h b/LUFA/Drivers/USB/Class/Host/HIDParser.h
index ec7ff53..8d3fbf2 100644 (file)
--- a/LUFA/Drivers/USB/Class/Host/HIDParser.h
+++ b/LUFA/Drivers/USB/Class/Host/HIDParser.h
@@ -46,16 +46,11 @@
  *  Functions, macros, variables, enums and types related to the parsing of HID class device report descriptors.\r
  *\r
  *  The processed HID report is presented back to the user application as a flat structure containing each report\r
  *  Functions, macros, variables, enums and types related to the parsing of HID class device report descriptors.\r
  *\r
  *  The processed HID report is presented back to the user application as a flat structure containing each report\r

- *  item's IN, OUT and FEATURE (if desired) items along with each item's attributes.\r
+ *  item's IN, OUT and FEATURE items along with each item's attributes.\r

  *\r
  *  This library portion also allows for easy setting and retrieval of data from a HID report, including devices\r
  *  with multiple reports on the one HID interface.\r
  *\r
  *\r
  *  This library portion also allows for easy setting and retrieval of data from a HID report, including devices\r
  *  with multiple reports on the one HID interface.\r
  *\r

- *  By default, FEATURE reports and IN/OUT reports with constant data are ignored in the HID report when processed\r
- *  to save on memory. This can be overridden by defining the HID_ENABLE_FEATURE_PROCESSING or\r
- *  HID_INCLUDE_CONSTANT_DATA_ITEMS tokens in the user project makefile, passing them to the compiler via the -D\r
- *  switch.\r
- *\r

  *  @{\r
  */\r
 \r
  *  @{\r
  */\r
 \r


@@ -108,13 +103,13 @@
                #endif\r
                \r
                #if !defined(HID_MAX_REPORTITEMS) || defined(__DOXYGEN__)\r
                #endif\r
                \r
                #if !defined(HID_MAX_REPORTITEMS) || defined(__DOXYGEN__)\r

-                       /** Constant indicating the maximum number of report items (IN, OUT or FEATURE if enabled) that can be\r
-                        *  processed in the report item descriptor. A large value allows for more report items to be\r
-                        *  processed, but consumes more memory. By default this is set to 30 items, but this can be\r
-                        *  overridden by defining HID_MAX_REPORTITEMS to another value in the user project makefile, passing\r
-                        *  the define to the compiler using the -D compiler switch.\r
+                       /** Constant indicating the maximum number of report items (IN, OUT or FEATURE) that can be processed \r
+                        *  in the report item descriptor and stored in the user HID Report Info structure. A large value allows\r
+                        *  for more report items to be stored, but consumes more memory. By default this is set to 20 items, \r
+                        *  but this can be overridden by defining HID_MAX_REPORTITEMS to another value in the user project\r
+                        *  makefile, passing the define to the compiler using the -D compiler switch.\r

                         */\r
                         */\r

-                       #define HID_MAX_REPORTITEMS           30\r
+                       #define HID_MAX_REPORTITEMS           20\r

                #endif\r
 \r
        /* Public Interface - May be used in end-application: */\r
                #endif\r
 \r
        /* Public Interface - May be used in end-application: */\r


@@ -250,6 +245,17 @@
                         */\r
                        void USB_SetHIDReportItemInfo(uint8_t* ReportData, const HID_ReportItem_t* ReportItem)\r
                                                      ATTR_NON_NULL_PTR_ARG(1, 2);\r
                         */\r
                        void USB_SetHIDReportItemInfo(uint8_t* ReportData, const HID_ReportItem_t* ReportItem)\r
                                                      ATTR_NON_NULL_PTR_ARG(1, 2);\r

+                                                                                 \r
+                       /** Callback routine for the HID Report Parser. This callback <b>must</b> be implemented by the user code when\r
+                        *  the parser is used, to determine what report IN, OUT and FEATURE item's information is stored into the user\r
+                        *  HID_ReportInfo_t structure. This can be used to filter only those items the application will be using, so that\r
+                        *  no RAM is wasted storing the attributes for report items which will never be referenced by the application.\r
+                        *\r
+                        *  \param CurrentItemAttributes  Pointer to the current report item attributes for user checking\r
+                        *\r
+                        *  \return Boolean true if the item should be stored into the HID_ReportInfo_t structure, false if it should be ignored\r
+                        */\r
+                       bool CALLBACK_HIDParser_FilterHIDReportItem(HID_ReportItem_Attributes_t* CurrentItemAttributes);\r

 \r
        /* Private Interface - For use in library only: */\r
        #if !defined(__DOXYGEN__)\r
 \r
        /* Private Interface - For use in library only: */\r
        #if !defined(__DOXYGEN__)\r

diff --git a/LUFA/ManPages/ChangeLog.txt b/LUFA/ManPages/ChangeLog.txt
index cbabdae..75ea016 100644 (file)
--- a/LUFA/ManPages/ChangeLog.txt
+++ b/LUFA/ManPages/ChangeLog.txt
@@ -18,6 +18,8 @@
   *  - Added ShutDown() functions for all hardware peripheral drivers, so that peripherals can be turned off after use\r
   *  - Added new CDC_Device_Flush() command to the device mode CDC Class driver to flush Device->Host data\r
   *  - Added extra masks to the SPI driver, changed SPI_Init() so that the clock polarity and sample modes can be set\r
   *  - Added ShutDown() functions for all hardware peripheral drivers, so that peripherals can be turned off after use\r
   *  - Added new CDC_Device_Flush() command to the device mode CDC Class driver to flush Device->Host data\r
   *  - Added extra masks to the SPI driver, changed SPI_Init() so that the clock polarity and sample modes can be set\r

+  *  - Added new callback to the HID report parser, so that the user application can filter only the items it is interested\r
+  *    in to be stored into the HIDReportInfo structure to save RAM\r

   *  \r
   *  <b>Changed:</b>\r
   *  - SetIdle requests to the HID device driver with a 0 idle period (send changes only) now only affect the requested\r
   *  \r
   *  <b>Changed:</b>\r
   *  - SetIdle requests to the HID device driver with a 0 idle period (send changes only) now only affect the requested\r


@@ -32,6 +34,8 @@
   *  - Changed the parameters and behaviour of the USB_GetDeviceConfigDescriptor() function so that it now performs size checks\r
   *    and data validations internally, to simplify user code\r
   *  - Changed HIDParser to only zero out important values in the Parsed HID Report Item Information structure to save cycles\r
   *  - Changed the parameters and behaviour of the USB_GetDeviceConfigDescriptor() function so that it now performs size checks\r
   *    and data validations internally, to simplify user code\r
   *  - Changed HIDParser to only zero out important values in the Parsed HID Report Item Information structure to save cycles\r

+  *  - The HID report parser now always processed FEATURE items - HID_ENABLE_FEATURE_PROCESSING token now has no effect\r
+  *  - The HID report parser now always ignores constant-data items, HID_INCLUDE_CONSTANT_DATA_ITEMS token now has no effect\r

   *\r
   *  <b>Fixed:</b>\r
   *  - Fixed possible lockup in the CDC device class driver, when the host sends data that is a multiple of the\r
   *\r
   *  <b>Fixed:</b>\r
   *  - Fixed possible lockup in the CDC device class driver, when the host sends data that is a multiple of the\r

diff --git a/LUFA/ManPages/CompileTimeTokens.txt b/LUFA/ManPages/CompileTimeTokens.txt
index 387af21..ee18d27 100644 (file)
--- a/LUFA/ManPages/CompileTimeTokens.txt
+++ b/LUFA/ManPages/CompileTimeTokens.txt
@@ -23,17 +23,6 @@
  *  \section Sec_SummaryUSBClassTokens USB Class Driver Related Tokens\r
  *  This section describes compile tokens which affect USB class-specific drivers in the LUFA library.\r
  *\r
  *  \section Sec_SummaryUSBClassTokens USB Class Driver Related Tokens\r
  *  This section describes compile tokens which affect USB class-specific drivers in the LUFA library.\r
  *\r

- *  <b>HID_ENABLE_FEATURE_PROCESSING</b> - ( \ref Group_HIDParser ) \n\r
- *  Define this token to enable the processing of FEATURE HID report items, if any, into the processed HID structure.\r
- *  By default FEATURE items (which are device features settable by the host but not directly visible by the user) are\r
- *  skipped when processing a device HID report.\r
- *\r
- *  <b>HID_INCLUDE_CONSTANT_DATA_ITEMS</b> - ( \ref Group_HIDParser ) \n\r
- *  By default, constant data items (usually used as spacers to align separate report items to a byte or word boundary)\r
- *  in the HID report are skipped during report processing. It is highly unusual for an application to make any use of\r
- *  constant data items (as they do not carry any useful data and only occupy limited RAM) however if required defining\r
- *  this switch will put constant data items into the processed HID report structure.\r
- *\r

  *  <b>HID_STATETABLE_STACK_DEPTH</b> - ( \ref Group_HIDParser ) \n\r
  *  HID reports may contain PUSH and POP elements, to store and retrieve the current HID state table onto a stack. This\r
  *  allows for reports to save the state table before modifying it slightly for a data item, and then restore the previous\r
  *  <b>HID_STATETABLE_STACK_DEPTH</b> - ( \ref Group_HIDParser ) \n\r
  *  HID reports may contain PUSH and POP elements, to store and retrieve the current HID state table onto a stack. This\r
  *  allows for reports to save the state table before modifying it slightly for a data item, and then restore the previous\r

diff --git a/LUFA/ManPages/MigrationInformation.txt b/LUFA/ManPages/MigrationInformation.txt
index 9527a37..a38c27b 100644 (file)
--- a/LUFA/ManPages/MigrationInformation.txt
+++ b/LUFA/ManPages/MigrationInformation.txt
@@ -24,6 +24,10 @@
  *      preallocate the largest allowable buffer, and pass the size of the buffer to the function. This allows for a single\r
  *      call to the function to retrieve, size check and validate the Configuration Descriptor rather than having the user\r
  *      application perform these intermediatary steps.\r
  *      preallocate the largest allowable buffer, and pass the size of the buffer to the function. This allows for a single\r
  *      call to the function to retrieve, size check and validate the Configuration Descriptor rather than having the user\r
  *      application perform these intermediatary steps.\r

+ *    - The HID report parser now requires a mandatory callback in the user code, to filter only the items the application\r
+ *      is interested in into the processed HID report item structure to save RAM. See \ref CALLBACK_HIDParser_FilterHIDReportItem().\r
+ *    - The HID report parser now always parses FEATURE and always ignores constant-data items - the HID_ENABLE_FEATURE_PROCESSING\r
+ *      and HID_INCLUDE_CONSTANT_DATA_ITEMS compile time tokens now have no effect.\r

  *\r
  * \section Sec_Migration090810 Migrating from 090605 to 090810\r
  *\r
  *\r
  * \section Sec_Migration090810 Migrating from 090605 to 090810\r
  *\r