Ensure that the Keyboard and Mouse demos adhere to the boot protocol specification...

[pub/USBasp.git] / Demos / Keyboard / Keyboard.c

diff --git a/Demos/Keyboard/Keyboard.c b/Demos/Keyboard/Keyboard.c
index a26f357..d6b254f 100644 (file)
--- 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. */\r
 static inline void SendNextReport(void)\r
 {\r
-       USB_KeyboardReport_Data_t KeyboardReportData;\r
-       bool                      SendReport = true;\r
+       static USB_KeyboardReport_Data_t PrevKeyboardReportData;\r
+       USB_KeyboardReport_Data_t        KeyboardReportData;\r
+       bool                             SendReport = true;\r
        \r
        /* Create the next keyboard report for transmission to the host */\r
        CreateKeyboardReport(&KeyboardReportData);\r
@@ -402,11 +403,14 @@ static inline void SendNextReport(void)
                }\r
                else\r
                {\r
-                       /* Idle period not elapsed, indicate that a report must not be sent */\r
-                       SendReport = false;                     \r
+                       /* Idle period not elapsed, indicate that a report must not be sent unless the report has changed */\r
+                       SendReport = (memcmp(&PrevKeyboardReportData, &KeyboardReportData, sizeof(USB_KeyboardReport_Data_t)) != 0);\r
                }\r
        }\r
        \r
+       /* Save the current report data for later comparison to check for changes */\r
+       PrevKeyboardReportData = KeyboardReportData;\r
+\r
        /* Select the Keyboard Report Endpoint */\r
        Endpoint_SelectEndpoint(KEYBOARD_EPNUM);\r
 \r