Hi Marcus,
UHD Version is 3.10.1.1
And target is X310 with UBX-40 installed.
If I only use Rx it works fine when changing the sample rate dynamically in a flowgraph. I probably need to test just using Tx. Using both Tx and Rx (sink and source) gives the error.
Note, if I use the same flowgraph with a USB radio (B205mini) all comms works fine.
Any help much appreciated,
Thanks,
NIgel
From: Discuss-gnuradio [mailto:discuss-gnuradio-bounces+address@hidden
On Behalf Of Marcus D. Leech
Sent: Wednesday, March 15, 2017 1:29 PM
To: address@hidden
Subject: Re: [Discuss-gnuradio] UHD Sink Error
On 03/15/2017 05:02 AM, Nigel Steed (XENINT) wrote:
Hi All,
I have a flowgraph which has both a uhd_sink and uhd_source. I also have the samp_rate for both of these linked to a QT Chooser to enable me to select valid sample rates dynamically at runtime.
If I change the sample rate from 500kHz to 12.5MHz I can repeatedly generate the following error and the transmitter stops:
read[thread-per-block[9]: <block gr uhd usrp sink (8)>]: RuntimeError: On node 0/DmaFIFO_0, input port 0 is already connected.
If I change between sample rates closer together (12.5MHz and 3.125MHz) this problem does not appear.
Has anyone else experienced this, and/or know of a solution ?
Thanks,
Nigel
What version of UHD? What USRP device type?