Thanks for the feedback. I've simulated the block and got it working with no errors over a few million samples as long as I assert axi_rate_change's clear when I change N (I've been swapping rates once every 200 transmissions in the testbench). I still get the timeout error in hardware, though. Could clearing be messing up some stored packet header information that simulation wouldn't catch?
Thanks, Andrew On Mon, Jan 28, 2019 at 4:34 PM Jonathon Pendlum <jonathon.pend...@ettus.com> wrote: > Hi Andrew, > > Have you simulated or used chipscope on your block? There is an output > from axi rate change called "error_extra_outputs" that can be useful. Does > it assert ever assert? If so, that means your user code has output more > samples than axi rate change was expecting. If any extra samples come out, > that breaks axi rate change's tracking of the input sample to output sample > ratio, which can eventually lead to a lock up. > > Jonathon > > On Tue, Jan 29, 2019 at 3:11 AM Andrew Danowitz via USRP-users < > usrp-users@lists.ettus.com> wrote: > >> I have an RFNOC block that, based on a control register can either >> decimate the signal it's working on or leave the output rate the same as >> the input rate. If I set the control register to an initial value (either >> decimate, or not decimate) and let the system run, it works fine in either >> mode. If I try to change the decimation mode while the block is running, I >> start getting timeout errors. I currently use the axi_rate_change block to >> help handle the rate change, and have tried to synchronize changing the >> block's mode (decimate or not) with the axi_rate_change's clear_user flag. >> Any thoughts? >> >> Thanks, >> Andrew >> >> ------------------------------ >> Information contained, linked, or attached to this email and all verbal >> communications from WhiteFox Defense to your entity in the prior 30 days >> constitute proprietary and confidential information unless otherwise >> indicated and is therefore subject to obligations in any executed >> confidentiality agreements. Further, this email is intended solely for the >> use of the individual or entity to whom they are addressed. If you are not >> the intended recipient and this message has been addressed to you in error, >> please promptly notify i...@whitefoxdefense.com and destroy all copies >> of the message and any attachments. This email and attachments may contain >> technical data as defined in the International Traffic In Arms Regulations >> (ITAR) 22 CFR 120.10 or the Export Administration Regulations (EAR) 15 CFR >> Parts 730 – 780. Export of this material may be controlled by these >> regulations and may not be exported or transferred to non-U.S. persons >> without prior written approval from the U.S. government. >> _______________________________________________ >> USRP-users mailing list >> USRP-users@lists.ettus.com >> http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com >> > -- Information contained, linked, or attached to this email and all verbal communications from WhiteFox Defense to your entity in the prior 30 days constitute proprietary and confidential information unless otherwise indicated and is therefore subject to obligations in any executed confidentiality agreements. Further, this email is intended solely for the use of the individual or entity to whom they are addressed. If you are not the intended recipient and this message has been addressed to you in error, please promptly notify i...@whitefoxdefense.com <mailto:i...@whitefoxdefense.com> and destroy all copies of the message and any attachments. This email and attachments may contain technical data as defined in the International Traffic In Arms Regulations (ITAR) 22 CFR 120.10 or the Export Administration Regulations (EAR) 15 CFR Parts 730 – 780. Export of this material may be controlled by these regulations and may not be exported or transferred to non-U.S. persons without prior written approval from the U.S. government.
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