X-Git-Url: http://git.linex4red.de/pub/lufa.git/blobdiff_plain/ecf7c18cf24a10df8d843c8f7c195d803e073330..205b35d131a1cc8196786de4370cb90fec17835e:/Demos/Host/LowLevel/KeyboardHostWithParser/HIDReport.c

diff --git a/Demos/Host/LowLevel/KeyboardHostWithParser/HIDReport.c b/Demos/Host/LowLevel/KeyboardHostWithParser/HIDReport.c
index 6ac1f5a65..2623878d1 100644
--- a/Demos/Host/LowLevel/KeyboardHostWithParser/HIDReport.c
+++ b/Demos/Host/LowLevel/KeyboardHostWithParser/HIDReport.c
@@ -70,3 +70,25 @@ 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 CurrentItemAttributes  Pointer to the attrbutes of 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_Attributes_t* CurrentItemAttributes)
+{
+	/* Check the attributes of the current item - see if we are interested in it or not */
+	if (CurrentItemAttributes->Usage.Page == USAGE_PAGE_KEYBOARD)
+	{
+		/* Only store KEYBOARD usage page items into the Processed HID Report structure to save RAM */
+		return true;
+	}
+	else
+	{
+		return false;
+	}
+}