Hi, Ruh roh, we're straying into evil territory here!
I suggest starting here: http://wiki.freebsd.org/dev/ath_hal%284%29/RadarDetection I've crimed the radar setup code from the reference driver and the madwifi-dfs branch, and I've started collecting the relevant public documentation for the radar detection hardware. I suggest starting off by looking at how the madwifi-dfs branch sets up the radar parameters and then flips on the RX filter bit (and I think phyerror mask too.) I haven't tried it for the AR5414 but I can likely find one and throw it onto a board. I won't be able to for a couple weeks though. The trick is realising that what you're receiving aren't strictly radar events, they're "spurious signals which match the radar threshold parameters and aren't decoded." This is all covered in the patent filings which I've linked to. I do know that I've seen radar events from both the AR5212/AR5213 and the 11n NICs (AR5416, AR9160, AR9280) all under FreeBSD-HEAD, with a very small/custom DFS module which just initialises the hardware to send events. If you're interested in working on an open source DFS matcher then great! You'll just have to find some test hardware to simulate both radar pulses and noise/non-radar stuff; the madwifi-dfs branch apparently has a high false-positive rate. Adrian _______________________________________________ ath5k-devel mailing list ath5k-devel@lists.ath5k.org https://lists.ath5k.org/mailman/listinfo/ath5k-devel
