Problem with spectral scan in VHT80 mode

[Mohammed Shafi Shajakhan]

Hi Gaurang,

On Tue, Jun 14, 2016 at 01:08:29AM -0400, Gaurang Ramesh Naik wrote:
> Apologies for my previous e-mail. I had read the whole page once, but
> somehow I missed the point about 64 bins for VHT80. It's working now.

[shafi] may i know the chipset you are testing, also if its feasible
you can share the graph plots of the spectral scan .

> 
> On Tue, Jun 14, 2016 at 12:37 AM, Gaurang Ramesh Naik <gaurang at vt.edu> wrote:
> > Hello,
> >
> > I was trying the ath10k's spectral scan. I used the following commands
> > given on the link
> > https://wireless.wiki.kernel.org/en/users/drivers/ath10k/spectral
> >
> > echo 8 > /sys/kernel/debug/ieee80211/phy0/ath10k/spectral_count
> > echo manual > /sys/kernel/debug/ieee80211/phy0/ath10k/spectral_scan_ctl
> > echo trigger > /sys/kernel/debug/ieee80211/phy0/ath10k/spectral_scan_ctl
> > cat /sys/kernel/debug/ieee80211/phy0/ath10k/spectral_scan0 >> /tmp/fft.dump
> >
> > I am using OpenWrt Bleeding edge. In the HT20 and HT40 mode, I
> > correctly get 8 samples. However, in the VHT80 mode, the /tmp/fft.dump
> > file generated is empty.
> >
> > In the open issues on the above link, it said that the HT40 and HT20
> > modes ignore the count parameter. That isn't the case for me. I seem
> > to get correct # of samples (I view the dump file using
> > https://github.com/simonwunderlich/FFT_eval). However, in the VHT80
> > mode, there seems to be no output. Am I doing something wrong here?
> >

regards,
shafi