I am using the UDP Multicast example. In there it has :
"//This constructor will only return when we have received a packet
UDPPacket upkt( &fifo,
10 /* Replace this 0 with a tick count to have a time out delat */ ); "
The example works fine the way it is, however when i change the 10 to a 0 to block until a packet arrives it never works.