On Tue, Oct 07, 2008 at 07:35:43AM -0700, kaleem ahmad wrote: > > Hi, > > I am using RFX2400+USRP+SUSI > > I am using following flowgraph to transmit data: > > gr.file_source -> gr.simple_framer -> gr.bytes_to_syms -> > gr.interp_fir_filter_fff -> gr.frequency_modulator_fc -> > gr.multiply_const_cc -> usrp.sink_c > > When I start the flowgraph by either start() or run() or MainLoop(), the > data is sent sussessfully for once if repeat option is False in file_source > or continuesly if repeat option is True. > > Actually I want to implement cyclic transmission (different from > gr.file_source.repeat=True) in such a way that whenever I want I can again > send data from that file (But if and only if I want, so I need control over > data transmission which I cant by just setting repeat in file_source=True ) > > But the problem is that the graph gets complete when data in the file is > finished and I cant ask the flowgraph to retransmit the data in the file. I > want to have an implementation where I could dictate the graph to transmit > data (externally, just like setting the frequency or gain while the graph is > still running). Furthermore is it possible to change the file name > externally while the graph is still running. > > Any suggestions!!!! > > Best Regards
Use a source that blocks when there's nothing in it. This could be a gr.file_source connected to a named pipe, or a file_descriptor_source connected to a pipe or socket. Then write into the other end of the connection when you want to send something. Eric _______________________________________________ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio
