X-Git-Url: http://git.linex4red.de/pub/USBasp.git/blobdiff_plain/f1199200e167a737a4676378da184387e543830c..05fcf7e2a79bebb978d4aeaef26b12f70c6826f8:/Demos/Host/LowLevel/KeyboardHostWithParser/HIDReport.c

diff --git a/Demos/Host/LowLevel/KeyboardHostWithParser/HIDReport.c b/Demos/Host/LowLevel/KeyboardHostWithParser/HIDReport.c
index 6ac1f5a65..0ad7d4b92 100644
--- a/Demos/Host/LowLevel/KeyboardHostWithParser/HIDReport.c
+++ b/Demos/Host/LowLevel/KeyboardHostWithParser/HIDReport.c
@@ -70,3 +70,20 @@ uint8_t GetHIDReportData(void)
 	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)
+{
+	/* Check the attributes of the current item - see if we are interested in it or not;
+	 * only store KEYBOARD usage page items into the Processed HID Report structure to
+	 * save RAM and ignore the rest
+	 */
+	return (CurrentItem->Attributes.Usage.Page == USAGE_PAGE_KEYBOARD);
+}