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-rw-r--r--Demos/Device/ClassDriver/VirtualSerialMassStorage/VirtualSerialMassStorage.c16
1 files changed, 16 insertions, 0 deletions
diff --git a/Demos/Device/ClassDriver/VirtualSerialMassStorage/VirtualSerialMassStorage.c b/Demos/Device/ClassDriver/VirtualSerialMassStorage/VirtualSerialMassStorage.c
index 1d2028316..bdffb279e 100644
--- a/Demos/Device/ClassDriver/VirtualSerialMassStorage/VirtualSerialMassStorage.c
+++ b/Demos/Device/ClassDriver/VirtualSerialMassStorage/VirtualSerialMassStorage.c
@@ -224,6 +224,22 @@ void EVENT_USB_Device_ControlRequest(void)
MS_Device_ProcessControlRequest(&Disk_MS_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;
+}
+
/** Mass Storage class driver callback function the reception of SCSI commands from the host, which must be processed.
*
* \param[in] MSInterfaceInfo Pointer to the Mass Storage class interface configuration structure being referenced