X-Git-Url: http://git.linex4red.de/pub/USBasp.git/blobdiff_plain/d1e52660368d34d693131f6aff3c8fd8584162e5..74b7c07e96562158de294f92baed4c83b4fce970:/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 8acaac7a1..dcb58dc40 100644
--- a/LUFA/Drivers/USB/Class/Device/CDC.c
+++ b/LUFA/Drivers/USB/Class/Device/CDC.c
@@ -136,6 +136,9 @@ void USB_CDC_SendString(USB_ClassInfo_CDC_t* CDCInterfaceInfo, char* Data, uint1
 
 void USB_CDC_SendByte(USB_ClassInfo_CDC_t* CDCInterfaceInfo, uint8_t Data)
 {
+	if (!(USB_IsConnected))
+	  return;
+
 	Endpoint_SelectEndpoint(CDCInterfaceInfo->DataINEndpointNumber);
 
 	if (!(Endpoint_IsReadWriteAllowed()))