Date: Fri, 24 Aug 2012 10:51:59 -0700 From: Adrian Chadd <adrian@freebsd.org> To: "Wright, Brett" <Brett.Wright@cooperindustries.com> Cc: freebsd-wireless@freebsd.org, Kim Culhan <w8hdkim@gmail.com> Subject: Re: Atheros DFS radar detection Message-ID: <CAJ-Vmo=cC3SbtgRuVyjjseLg0E9SA1UBRh5fh_j1ROxo-p6PCw@mail.gmail.com> In-Reply-To: <475A4E02EFF4724A9E58F55A56AC131606667F85@APEVS1.ap.ci.root> References: <CAKZxVQU-%2BW9AP4a9W0PGyLmBOa1GVOrGcLC8bp5zW_=K%2Bv3tHA@mail.gmail.com> <475A4E02EFF4724A9E58F55A56AC13160641D618@APEVS1.ap.ci.root> <CAKZxVQWeOnw_kZWzuXfHSS-ssQfGVG=ybYK%2B%2B8EaqnFVe-rLpg@mail.gmail.com> <CAJ-Vmon=NfyZW9vJRSNxTLZvJhobeCP-S1O3TxopNzArWunCCQ@mail.gmail.com> <475A4E02EFF4724A9E58F55A56AC13160661E6AC@APEVS1.ap.ci.root> <CAJ-VmomJZD_NBM8=N1oD1a0XCFLoXoezStXHKLKCSGLBFrKT2Q@mail.gmail.com> <475A4E02EFF4724A9E58F55A56AC13160661F137@APEVS1.ap.ci.root> <CAJ-Vmo=6HLXxYLG3u-oAndR66wtnSySYm5Rp7Jp5T6eyiPq7UQ@mail.gmail.com> <475A4E02EFF4724A9E58F55A56AC131606667F85@APEVS1.ap.ci.root>
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Hi Brett, I've been productive! * I've added a default radar parameter method to the AR5212 and AR5416 HALs, so now the default parameters are stored there; * I've extended dfs_null (behind #if 0 for now) to fetch these parameters and program them in - as well as only doing it for NICs where DFS is supported. * I've taught my pktlog/libradarpkt code (in user/adrian/ath_radar_stuff) to parse the AR5212 records - so all you need to do is set dev.ath.X.monpass=0xff, then run my pktlog program to see what's going on I haven't yet sat down and done actual radar pulse train detection with the AR5212 and I know it's just going to plain suck at doing chirps in a busy environment (as they just look like long pulses; there's no FFT data to assist the software in decoding what's going on) but it should be enough to get you started. Have you tried these NICs on different hardware? I wonder if you're seeing some kind of spur or board noise that's contributing to both the false detections and the high noise floor calibration value. I don't have an SR-5 here to test against I'm afraid.. Thanks, Adrian
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