Hi Steve,
Worth it to submit an additional bug noting the fifo timeout for longer set_command_time()? I think that it > is merely an additional symptom of the issue you found.
No, actually I think your timeout after set_command_time is not /really/ a bug, actually. The gr-uhd usrp_source uses uhd::multi_usrp, which your case uses uhd/host/lib/usrp/usrp2/usrp2_fifo_ctrl.cpp that has set_time, which gets called whenever you issue a timed command. This sets your UHD timeout to MASSIVE_TIMEOUT (same file, == 10s), so that wait_for_ack (same file) throws your runtime error. So, basically, unless you don't modify your uhd sources, the wisest solution to your problem seems to be not letting something happen more than 10s in the future. Hope that helped, Marcus Müller On 09/04/2013 02:59 AM, Steve Zygmunt wrote:
could you try if http://gnuradio.org/redmine/issues/584 applies to you as well? Thanks, Marcus MüllerI was wondering if anyone could give some insight into how the set_command_time() command handles the ack. I am having an issue where the system/thread locks waiting for an ACK from a set_center_freq() or if the set_command_time is far enough in the future then the fifo ctrl times out with: File "/opt/local/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/site-packages/gnuradio/uhd/uhd_swig.py", line 2827, in set_center_freq return _uhd_swig.usrp_source_sptr_set_center_freq(self, *args) RuntimeError: RuntimeError: fifo ctrl timed out looking for acks The end goal I am trying to achieve is to tune at a specific time. The only other approach to solve that I can see is to add a tune flag to the stream and modify the gr-uhd and uhd software to handle appropriately, which I would rather not open that can of worms if I don't have to. Any advice would be greatly appreciated. System: Mac Laptop with 10.8 with USRP N210 Macports gnuradio-devel @3.7.1_20130821 Macports uhd @003_005_003
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