1 files changed, 8 insertions, 1 deletions
diff --git a/usb-i2c-sl018/tuer-rfid.c b/usb-i2c-sl018/tuer-rfid.c
index 76fb877..91906bf 100644
--- a/usb-i2c-sl018/tuer-rfid.c
+++ b/usb-i2c-sl018/tuer-rfid.c
@@ -173,7 +173,6 @@ void EVENT_USB_Device_ConfigurationChanged(void)
 {
   CDC_Device_ConfigureEndpoints(&VirtualSerial_CDC_Interface);
   CDC_Device_CreateStream(&VirtualSerial_CDC_Interface,&usb_stream);
-  stdio = &usb_stream;
 }
 
 void EVENT_USB_Device_ControlRequest(void)
@@ -181,6 +180,14 @@ void EVENT_USB_Device_ControlRequest(void)
   CDC_Device_ProcessControlRequest(&VirtualSerial_CDC_Interface);
 }
 
+void EVENT_CDC_Device_ControLineStateChanged(USB_ClassInfo_CDC_Device_t* const CDCInterfaceInfo)	
+{
+  if(CDCInterfaceInfo->State.ControlLineStates.HostToDevice & CDC_CONTROL_LINE_OUT_DTR)
+    stdio = &usb_stream;
+  else
+    stdio = &serial_stream;
+}
+
 void EVENT_USB_Device_Disconnect(void)
 {
   stdio = &serial_stream;