Date: Mon, 5 May 2014 11:52:56 -0700 From: John-Mark Gurney <jmg@funkthat.com> To: ticso@cicely.de Cc: freebsd-arm@freebsd.org Subject: Re: USB audio device on Raspberry Pi - link_elf: symbol isa_dmastatus undefined Message-ID: <20140505185256.GU43976@funkthat.com> In-Reply-To: <20140505182722.GD78493@cicely7.cicely.de> References: <20140425154430.GA76168@utility-01.thismonkey.com> <535A8AEA.1000100@selasky.org> <20140425204134.GA458@cicely7.cicely.de> <20140430091411.GA45015@utility-01.thismonkey.com> <5360C0A7.9010407@selasky.org> <1398867266.22079.51.camel@revolution.hippie.lan> <CAGW5k5bZ_bTQUXuzNm=tbwx3npz1_HoOR3vM8TBRVFs8zWCq-w@mail.gmail.com> <5362638B.1080104@selasky.org> <20140505173709.GR43976@funkthat.com> <20140505182722.GD78493@cicely7.cicely.de>
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Bernd Walter wrote this message on Mon, May 05, 2014 at 20:27 +0200:
> On Mon, May 05, 2014 at 10:37:09AM -0700, John-Mark Gurney wrote:
> > Hans Petter Selasky wrote this message on Thu, May 01, 2014 at 17:08 +0200:
> > > On 05/01/14 01:34, Johny Mattsson wrote:
> > > >On 1 May 2014 00:14, Ian Lepore <ian@freebsd.org> wrote:
> > > >
> > > >>I was doing some testing on a wandboard (about twice as fast an an rpi)
> > > >>with
> > > >>more than 20k int/sec without having any problems.
> > > >>
> > > >
> > > >On a similar note, I've pushed an i.MX 283 (400MHz) board to above 300k
> > > >int/sec, on Linux. Admittedly at that point my shell wasn't what you'd call
> > > >"responsive" however =) The ISR in that scenario was the GPIO handler, so
> > > >probably a bit more light-weight than an audio ISR.
> > >
> > > Hi,
> > >
> > > I'll have a look and see if I can fix it.
> >
> > So, I have both a BBW and a BBB and both devices don't have working
> > USB... If I plug in a device, like a uftdi serial adapter, the blue
> > light flashes briefly but then stays off... It should stay on...
>
> AFAIK we don't switch any LED at all, so this probably is a power problem.
> What rating has your power supply?
2A 5V..
> Do you use the barrel or USB plug to power the board?
Yes...
> I think you need to use the barrel plug for additional load, since
> the board has some kind of current limitation for the USB connector.
Oh, just decided to "eliminate" the power problem, and I pluged in
a USB powered hub... This time the light stays on on the serial
adapter, but neither the hub, nor the serial adapter is seen by the
BBB...
--
John-Mark Gurney Voice: +1 415 225 5579
"All that I will do, has been done, All that I have, has not."
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