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 -- View this message in context: http://www.nabble.com/Implementing-controlled-tran... Sent from the GnuRadio mailing list archive at Nabble.com.
on 2008-10-07 16:37
on 2008-10-07 19:22
On Tue, Oct 07, 2008 at 07:35:43AM -0700, kaleem ahmad wrote: > > 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