From: Dean Camera <dean@fourwalledcubicle.com>
Date: Thu, 19 Mar 2009 15:10:51 +0000 (+0000)
Subject: Ensure that the Keyboard and Mouse demos adhere to the boot protocol specification... 
X-Git-Tag: LUFA-110528-BETA~1250
X-Git-Url: http://git.linex4red.de/pub/USBasp.git/commitdiff_plain/ee7bd5685e000b3a128069fd75d436c653ab54b2

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.
---

diff --git a/Demos/Keyboard/Keyboard.c b/Demos/Keyboard/Keyboard.c
index a26f357a1..d6b254ffb 100644
--- a/Demos/Keyboard/Keyboard.c
+++ b/Demos/Keyboard/Keyboard.c
@@ -385,8 +385,9 @@ void ProcessLEDReport(uint8_t LEDReport)
 /** Sends the next HID report to the host, via the keyboard data endpoint. */
 static inline void SendNextReport(void)
 {
-	USB_KeyboardReport_Data_t KeyboardReportData;
-	bool                      SendReport = true;
+	static USB_KeyboardReport_Data_t PrevKeyboardReportData;
+	USB_KeyboardReport_Data_t        KeyboardReportData;
+	bool                             SendReport = true;
 	
 	/* Create the next keyboard report for transmission to the host */
 	CreateKeyboardReport(&KeyboardReportData);
@@ -402,11 +403,14 @@ 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(&PrevKeyboardReportData, &KeyboardReportData, sizeof(USB_KeyboardReport_Data_t)) != 0);
 		}
 	}
 	
+	/* Save the current report data for later comparison to check for changes */
+	PrevKeyboardReportData = KeyboardReportData;
+
 	/* Select the Keyboard Report Endpoint */
 	Endpoint_SelectEndpoint(KEYBOARD_EPNUM);
 
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);