Make sure the button report set masks use OR in all circumstances, to prevent user confusion. While the first set of the buttons report item can be a direct assignment, it is not immediately clear to new developers why this is the case.

Demos/Device/ClassDriver/KeyboardMouse/KeyboardMouse.c

@@ -217,7 +217,7 @@ bool CALLBACK_HID_Device_CreateHIDReport(USB_ClassInfo_HID_Device_t* const HIDIn
 		  MouseReport->X =  1;
 
 		if (JoyStatus_LCL & JOY_PRESS)
-		  MouseReport->Button  = (1 << 0);
+		  MouseReport->Button |= (1 << 0);
 		
 		*ReportSize = sizeof(USB_MouseReport_Data_t);
 		return true;		

Demos/Device/ClassDriver/Mouse/Mouse.c

@@ -155,7 +155,7 @@ bool CALLBACK_HID_Device_CreateHIDReport(USB_ClassInfo_HID_Device_t* const HIDIn
 	  MouseReport->X =  1;
 
 	if (JoyStatus_LCL & JOY_PRESS)
-	  MouseReport->Button  = (1 << 0);
+	  MouseReport->Button |= (1 << 0);
 	  
 	if (ButtonStatus_LCL & BUTTONS_BUTTON1)
 	  MouseReport->Button |= (1 << 1);

Demos/Device/ClassDriver/VirtualSerialMouse/VirtualSerialMouse.c

@@ -217,7 +217,7 @@ bool CALLBACK_HID_Device_CreateHIDReport(USB_ClassInfo_HID_Device_t* const HIDIn
 	  MouseReport->X =  1;
 
 	if (JoyStatus_LCL & JOY_PRESS)
-	  MouseReport->Button  = (1 << 0);
+	  MouseReport->Button |= (1 << 0);
 	  
 	if (ButtonStatus_LCL & BUTTONS_BUTTON1)
 	  MouseReport->Button |= (1 << 1);

Demos/DualRole/ClassDriver/MouseHostDevice/DeviceFunctions.c

@@ -123,7 +123,7 @@ bool CALLBACK_HID_Device_CreateHIDReport(USB_ClassInfo_HID_Device_t* const HIDIn
 	  MouseReport->X = -1;
 
 	if (JoyStatus_LCL & JOY_PRESS)
-	  MouseReport->Button  = (1 << 0);
+	  MouseReport->Button |= (1 << 0);
 	  
 	if (ButtonStatus_LCL & BUTTONS_BUTTON1)
 	  MouseReport->Button |= (1 << 1);