[PD] Raspberry Pi Behringer UCA222 boot problems

Martin Peach martin.peach at sympatico.ca
Sat Jul 27 16:36:14 CEST 2013


Maybe your power supply can't handle the load? 2 Amps regulated 5V is 
good, 1 Amp might not do it.

Martin

On 2013-07-27 05:51, John Canning wrote:
> Hi Dan,
>
> I have done some more hunting around and on the Pd FrontPage site it
> says that my Behringer soundcard has been proven to work with the
> Raspberry Pi with reduced USB speed and I have found some posts that say
> they have it running in full duplex. What I get is something like this
> when I have the sound card plugged in on boot
>
> [    2.469784] usb 1-1.3: new high-speed USB device number 4 using dwc_otg
> [    2.571518] usb 1-1.3: New USB device found, idVendor=05e3, idProduct=0608
> [    2.571545] usb 1-1.3: New USB device strings: Mfr=0, Product=1, SerialNumber=0
> [    2.571562] usb 1-1.3: Product: USB2.0 Hub
> [    2.573135] hub 1-1.3:1.0: USB hub found
> [    2.573640] hub 1-1.3:1.0: 4 ports detected
> [    2.849881] usb 1-1.3.4: new full-speed USB device number 5 using dwc_otg
> [    2.953034] usb 1-1.3.4: New USB device found, idVendor=08bb, idProduct=2704
> [    2.953064] usb 1-1.3.4: New USB device strings: Mfr=1, Product=2, SerialNumber=0
> [    2.953081] usb 1-1.3.4: Product: USB Audio DAC
> [    2.953096] usb 1-1.3.4: Manufacturer: Burr-Brown from TI
> [    2.958781] input: Burr-Brown from TI               USB Audio DAC    as /devices/platform/bcm2708_usb/usb1/1-1/1-1.3/1-1.3.4/1-1.3.4:1.2/input/input0
> [    2.960263] hid-generic 0003:08BB:2704.0001: input,hidraw0: USB HID v1.00 Device [Burr-Brown from TI               USB Audio DAC   ] on usb-bcm2708_usb-1.3.4/input2
>
>   and it just hangs there. This is with nothing else plugged in to the
> PI. Without the lowered USB speed I get so many dropouts that it is
> completely unusable. I'm sorry to keep harping on about the same thing
> but as with all of these things you find a little nugget that gives you
> hope (and another and another). The videos that I have seen like this
>
> http://hackaday.com/2013/01/28/raspberry-pi-becomes-a-guitar-effects-processor/
>
> are pretty much what I'm looking for. Imperceptible/minimal dropouts and
> decent FX. Can you or anyone tell me why I can't even boot the Pi with
> the (previously community tested) soundcard plugged in running at USB 1
> speed? Or why if I plug it in after booting I crash the Pi?
>
> This post
>
> http://lists.puredata.info/pipermail/pd-list/2013-01/100560.html
>
> and others in the same thread are what started me on this mission so if
> any of the contributors to it could tell me how they have got this up
> and running I would eternally grateful
>
> Thanks again,
> John
>
>
> On Sat, Jul 27, 2013 at 12:26 AM, Dan Wilcox <danomatika at gmail.com
> <mailto:danomatika at gmail.com>> wrote:
>
>     For what it's worth, I tried force ing USB 1.1 mode on the pi with
>     my UA-25 and that resulted in a hard lock as well. Disappointing at
>     this point since I've worked with audio on slower embedded machines
>     before ...
>
>     On Jul 26, 2013, at 7:19 PM, John Canning
>     <johnnyboy7777 at hotmail.co.uk <mailto:johnnyboy7777 at hotmail.co.uk>>
>     wrote:
>
>>     Thanks for getting back to me Dan
>>
>>
>>     On Fri, Jul 26, 2013 at 11:50 PM, Dan Wilcox <danomatika at gmail.com
>>     <mailto:danomatika at gmail.com>> wrote:
>>
>>         Actually I miss-typed. The issue is with "Isochronous" usb
>>         mode:
>>         http://www.raspberrypi.org/phpBB3/viewtopic.php?f=28&t=29226 Looks
>>         like things should be better for USB 2 audio devices, but
>>         still issues with USB 1.1 devices (aka mine :P):
>>
>>>         While Isoc has improved for pretty much everyone using USB2.0
>>>         devices (USB1.1 will still suffer from lost packets due to
>>>         split transaction breakage noted elsewhere) I'm still annoyed
>>>         at my webcams "kinda working" - I get 1-2 seconds of
>>>         uninterrupted video and then a half-garbled frame.
>>
>>
>>         On Jul 26, 2013, at 6:35 PM, Dan Wilcox <danomatika at gmail.com
>>         <mailto:danomatika at gmail.com>> wrote:
>>
>>>         Sure, but that's only for certain types of USB devices. Some
>>>         are working and others aren't. More "professional" sound
>>>         cards require lower-latency/burst mode over USB which the PI
>>>         firmware currently doesn't allow and/or doesn't set the
>>>         correct priority for. The issue AFAICT is that essentially
>>>         the usb host is software defined on the SOC and they haven't
>>>         optimized it for usb audio, or something like that.
>>>
>>>         For instance, I can get stereo out in Pd working fine with my
>>>         Edirol UA-25 . If I enable an audio input, I get instant
>>>         dropouts. Yeah, I guess it "works", but not well enough for me.
>>>
>>>         On Jul 26, 2013, at 6:27 PM, John Canning
>>>         <johnnyboy7777 at hotmail.co.uk
>>>         <mailto:johnnyboy7777 at hotmail.co.uk>> wrote:
>>>
>>>>         Hi Dan,
>>>>
>>>>         Thanks for getting back to me. I'm still very new to the Pi
>>>>         but have found this post that seems to say that it can work.
>>>>         I'm confused. What do you reckon?
>>>>
>>>>
>>>>         On Fri, Jul 26, 2013 at 11:02 PM, Dan Wilcox
>>>>         <danomatika at gmail.com <mailto:danomatika at gmail.com>> wrote:
>>>>
>>>>             Simply put, the RPI firmware does not work with USB
>>>>             audio correctly yet. See this thread:
>>>>             http://lists.puredata.info/pipermail/pd-list/2013-07/103261.html
>>>>
>>>>             I keep looking for fixes, but the way USB is handled,
>>>>             the only way for it to work without dropouts is to have
>>>>             *nothing* else plugged into the usb bus and ethernet
>>>>             disabled ... sucks.
>>>>
>>>>             On Jul 26, 2013, at 5:41 PM, pd-list-request at iem.at
>>>>             <mailto:pd-list-request at iem.at> wrote:
>>>>
>>>>>             *From:*John Canning <johnnyboy7777 at hotmail.co.uk
>>>>>             <mailto:johnnyboy7777 at hotmail.co.uk>>
>>>>>             *Subject:**[PD] Raspberry Pi Behringer UCA222 boot
>>>>>             problems*
>>>>>             *Date:*July 26, 2013 5:40:49 PM EDT
>>>>>             *To:*Pure Data <pd-list at iem.at <mailto:pd-list at iem.at>>
>>>>>
>>>>>
>>>>>             Hi Folks,
>>>>>
>>>>>             I have been trying for quite a while to get my
>>>>>             Raspberry Pi to work in full duplex with Pd. I have
>>>>>             installed the OS on the PdPi site and updated it. I am
>>>>>             using a Behringer UCA222 for audio. When I change the
>>>>>             USB speed down to 1 (dwc_otg.speed=1) in
>>>>>             /boot/cmdline.txt my Pi won't boot with the soundcard
>>>>>             plugged in. If I unplug the soundcard the Pi will boot
>>>>>             but as soon as I plug it in the Pi crashes. Has anyone
>>>>>             got any suggestions about why this is happening?
>>>>>
>>>>>             Thanks,
>>>>>             John
>>>>
>>>>             --------
>>>>             Dan Wilcox
>>>>             @danomatika
>>>>             danomatika.com <http://danomatika.com/>
>>>>             robotcowboy.com <http://robotcowboy.com/>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>>
>>>
>>>         --------
>>>         Dan Wilcox
>>>         @danomatika
>>>         danomatika.com <http://danomatika.com/>
>>>         robotcowboy.com <http://robotcowboy.com/>
>>>
>>>
>>>
>>>
>>>
>>
>>         --------
>>         Dan Wilcox
>>         @danomatika
>>         danomatika.com <http://danomatika.com/>
>>         robotcowboy.com <http://robotcowboy.com/>
>>
>>
>>
>>
>>
>>
>
>     --------
>     Dan Wilcox
>     @danomatika
>     danomatika.com <http://danomatika.com>
>     robotcowboy.com <http://robotcowboy.com>
>
>
>
>
>
>
>
>
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