Don't fail Doxygen on versions built without various features.

[pub/USBasp.git] / Demos / Device / ClassDriver / VirtualSerial / VirtualSerial.c

diff --git a/Demos/Device/ClassDriver/VirtualSerial/VirtualSerial.c b/Demos/Device/ClassDriver/VirtualSerial/VirtualSerial.c
index 101e3a4..d9429ba 100644 (file)
--- a/Demos/Device/ClassDriver/VirtualSerial/VirtualSerial.c
+++ b/Demos/Device/ClassDriver/VirtualSerial/VirtualSerial.c
@@ -1,13 +1,13 @@
 /*
              LUFA Library
-     Copyright (C) Dean Camera, 2013.
+     Copyright (C) Dean Camera, 2014.
 
   dean [at] fourwalledcubicle [dot] com
            www.lufa-lib.org
 */
 
 /*
-  Copyright 2013  Dean Camera (dean [at] fourwalledcubicle [dot] com)
+  Copyright 2014  Dean Camera (dean [at] fourwalledcubicle [dot] com)
 
   Permission to use, copy, modify, distribute, and sell this
   software and its documentation for any purpose is hereby granted
@@ -185,3 +185,18 @@ void EVENT_USB_Device_ControlRequest(void)
        CDC_Device_ProcessControlRequest(&VirtualSerial_CDC_Interface);
 }
 
+/** CDC class driver callback function the processing of changes to the virtual
+ *  control lines sent from the host..
+ *
+ *  \param[in] CDCInterfaceInfo  Pointer to the CDC class interface configuration structure being referenced
+ */
+void EVENT_CDC_Device_ControLineStateChanged(USB_ClassInfo_CDC_Device_t *const CDCInterfaceInfo)
+{
+       /* You can get changes to the virtual CDC lines in this callback; a common
+          use-case is to use the Data Terminal Ready (DTR) flag to enable and
+          disable CDC communications in your application when set to avoid the
+          application blocking while waiting for a host to become ready and read
+          in the pending data from the USB endpoints.
+       */
+       bool HostReady = (CDCInterfaceInfo->State.ControlLineStates.HostToDevice & CDC_CONTROL_LINE_OUT_DTR) != 0;
+}