X-Git-Url: http://git.linex4red.de/pub/USBasp.git/blobdiff_plain/09bedd6555a72c70f6d6bfb965225d44dec171cd..bda4bd45016714e892252fc7aaee88f6d20af231:/LUFA/Drivers/USB/Class/Device/CDC.c

diff --git a/LUFA/Drivers/USB/Class/Device/CDC.c b/LUFA/Drivers/USB/Class/Device/CDC.c
index 003a6b31a..816a5f13d 100644
--- a/LUFA/Drivers/USB/Class/Device/CDC.c
+++ b/LUFA/Drivers/USB/Class/Device/CDC.c
@@ -118,6 +118,11 @@ void CDC_Device_USBTask(USB_ClassInfo_CDC_Device_t* CDCInterfaceInfo)
 	if ((USB_DeviceState != DEVICE_STATE_Configured) || !(CDCInterfaceInfo->State.LineEncoding.BaudRateBPS))
 	  return;
 
+	Endpoint_SelectEndpoint(CDCInterfaceInfo->Config.DataOUTEndpointNumber);
+
+	if (Endpoint_IsOUTReceived() && !(Endpoint_BytesInEndpoint()))
+	  Endpoint_ClearOUT();
+	  
 	CDC_Device_Flush(CDCInterfaceInfo);
 }
 
@@ -174,6 +179,9 @@ uint8_t CDC_Device_Flush(USB_ClassInfo_CDC_Device_t* const CDCInterfaceInfo)
 
 uint16_t CDC_Device_BytesReceived(USB_ClassInfo_CDC_Device_t* const CDCInterfaceInfo)
 {
+	if ((USB_DeviceState != DEVICE_STATE_Configured) || !(CDCInterfaceInfo->State.LineEncoding.BaudRateBPS))
+	  return 0;
+
 	Endpoint_SelectEndpoint(CDCInterfaceInfo->Config.DataOUTEndpointNumber);
 
 	if (Endpoint_IsOUTReceived() && !(Endpoint_BytesInEndpoint()))