diff options
Diffstat (limited to 'Demos/Host/LowLevel/MouseHostWithParser/HIDReport.c')
| -rw-r--r-- | Demos/Host/LowLevel/MouseHostWithParser/HIDReport.c | 24 |
1 files changed, 24 insertions, 0 deletions
diff --git a/Demos/Host/LowLevel/MouseHostWithParser/HIDReport.c b/Demos/Host/LowLevel/MouseHostWithParser/HIDReport.c index 4d895908e..41abcb221 100644 --- a/Demos/Host/LowLevel/MouseHostWithParser/HIDReport.c +++ b/Demos/Host/LowLevel/MouseHostWithParser/HIDReport.c @@ -69,3 +69,27 @@ 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_BUTTON) ||
+ (CurrentItemAttributes->Usage.Page == USAGE_PAGE_GENERIC_DCTRL))
+ {
+ /* Only store BUTTON and GENERIC_DESKTOP_CONTROL items into the Processed HID Report structure to save RAM */
+ return true;
+ }
+ else
+ {
+ return false;
+ }
+}
|