Dear all, I'm using gr.message_source as the signal source and using multiply_const_ff to set the amplitude of the signal then feeding the signal into USRP1 with LFTX plugged-in. The message need to be transmitted in my project is 3315 bytes. After the flow graph starting to run, msgq.insert_tail() is utilized to insert the message into the flow graph. The amplitude changes every time after the message is transmitted. I only called insert_tail() once in every cycle of transmission to feed the message and expect the message to be sent once, but the result turns out the times of the message transmission is ranging from once to 10 times, which means sometimes the message is only transmitted once, sometimes it continuously repeated 10 times. What's the problem would be? What decide the parameter, msgq_limit, which is the maximum number of message in the message queue? Can I send this 3315 bytes data as one message and set the msgq_limit as 1?
Really appreciate any of your suggestion! Thanks, Yan The code related to message insert try: while 1: tb.set_amplitude(2000) msg_13bit = gr.message_from_string(payload_13bit) tb._ls.msgq.insert_tail(msg_13bit) tb.set_amplitude(0) msg_stop = gr.message_from_string(payload_stop) tb._ls.msgq.insert_tail(msg_stop) _______________________________________________ Discuss-gnuradio mailing list Discuss-gnuradio@gnu.org http://lists.gnu.org/mailman/listinfo/discuss-gnuradio