added handling of cmd frame
added handling of cmd frame

joakimeriksson/mspsim,ransford/mspsim,mspsim/mspsim,ransford/mspsim,joakimeriksson/mspsim,nfi/mspsim,fvdnabee/mspsim,fvdnabee/mspsim,contiki-os/mspsim,contiki-os/mspsim,cmorty/mspsim,mspsim/mspsim,nfi/mspsim,cmorty/mspsim