Re: [Discuss-gnuradio] Reconfiguring Flowgraphs

[Marcus Müller]

unless you also disconnect block A and sink1, GNU Radio will continue to assume that block A should produce output for sink1, and it can't do that without input.

Greetings,
Marcus

On 21.07.2014 13:43, xianda wrote:

I forget to say:the "sink" also different with each other.Namely:
                        source--->block A(just one block)--->sink1
                        source--->block B(just one block)--->sink2
Can someone help me?Thanks.






At 2014-07-21 06:50:10, "xianda" <address@hidden> wrote:

Hi all:
         Thank you in advance.I want to ask some questions about the "Reconfiguring Flowgraphs".
         My flowgraphs:
                                  source--->block A(just one block)--->sink
And I want to run the flowgraphs for 30 seconds,and then run the other flowgraphs:
                                   source--->block B(just one block)--->sink
And I have read the API,and then I write something like this:

def main():
		tb=my_top_block()
		tb.start()
		time.sleep(30)

		#stop flowgraph
		tb.lock()
		tb.disconnect((tb.uhd_usrp_source_0,0),(tb.rx_0,0))

		#start flowgraph
		tb.connect((tb.uhd_usrp_source_0,0),(tb.rx_1,0))
		tb.connect((tb.rx_1,0),tb.snk)
                #  blockA:(tb.rx_0,0)    blockB:(tb.rx_1,0)	
                tb.unlock()

		tb.wait()
But it go error:    RuntimeError: delay(4): insufficient connected input ports (1 needed, 0 connected)
Can someone help me?Thank you.
Best regards,
xd

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