Date: Mon, 5 May 2014 20:27:22 +0200 From: Bernd Walter <ticso@cicely7.cicely.de> To: Hans Petter Selasky <hps@selasky.org>, freebsd-arm@freebsd.org Subject: Re: USB audio device on Raspberry Pi - link_elf: symbol isa_dmastatus undefined Message-ID: <20140505182722.GD78493@cicely7.cicely.de> In-Reply-To: <20140505173709.GR43976@funkthat.com> 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>
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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? Do you use the barrel or USB plug to power the board? 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. -- B.Walter <bernd@bwct.de> http://www.bwct.de Modbus/TCP Ethernet I/O Baugruppen, ARM basierte FreeBSD Rechner uvm.
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