Ensure that the Keyboard and Mouse demos adhere to the boot protocol specification in that they send a report before the idle period has elapsed if the report data has changed.

1 files changed, 8 insertions, 4 deletions

diff --git a/Demos/Mouse/Mouse.c b/Demos/Mouse/Mouse.c
index c4b7f55ad..c066d424a 100644
--- a/Demos/Mouse/Mouse.c
+++ b/Demos/Mouse/Mouse.c
@@ -337,8 +337,9 @@ void CreateMouseReport(USB_MouseReport_Data_t* ReportData)
 /** Sends the next HID report to the host, via the keyboard data endpoint. */

 static inline void SendNextReport(void)

 {

-	USB_MouseReport_Data_t MouseReportData;

-	bool                   SendReport = true;

+	static USB_MouseReport_Data_t PrevMouseReportData;

+	USB_MouseReport_Data_t        MouseReportData;

+	bool                          SendReport = true;

 	

 	/* Create the next mouse report for transmission to the host */

 	CreateMouseReport(&MouseReportData);

@@ -354,10 +355,13 @@ static inline void SendNextReport(void)
 		}

 		else

 		{

-			/* Idle period not elapsed, indicate that a report must not be sent */

-			SendReport = false;

+			/* Idle period not elapsed, indicate that a report must not be sent unless the report has changed */

+			SendReport = (memcmp(&PrevMouseReportData, &MouseReportData, sizeof(USB_MouseReport_Data_t)) != 0);

 		}

 	}

+

+	/* Save the current report data for later comparison to check for changes */

+	PrevMouseReportData = MouseReportData;

 	

 	/* Select the Mouse Report Endpoint */

 	Endpoint_SelectEndpoint(MOUSE_EPNUM);