[beagleboard] Re: Atlantic Canada Timezone

[DLF]

In Debian, I find it inside 
usr/share/zoneinfo/Canada/



On Sunday, 11 May 2014 00:53:46 UTC+2, mike rankin wrote:
>
> I'm having trouble finding the Atlantic Canada Timezone for setting up the 
> time being pulled over ethernet from the instructions at: 
> http://www.circuidipity.com/getting-started-with-beaglebone-black.html
> Inside usr/share/zoneinfo/ I cannot find the Atlantic timezone.
>

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Re: [beagleboard] BeagleBoard Data Acquisition Platform

[Przemek Klosowski]

On Sun, May 11, 2014 at 11:33 AM, sa_Penguin  wrote:

> As for WHY I want one - primarily, RF signal analysis. 120 Msample/sec lets
> you grab from DC to 30MHz, with simple filtering.
> You can also monitor FM bands [88-108MHz] which fall in the 2nd Nyquist
> sample zone and get "reflected" down to 12 - 32 MHz
> Oh, and amateur radio and weather satellites, in the band 140 - 150 MHz, can
> be under sampled at 25 - 30MHz.
>
> Not to mention being able to cover 40MHz of bandwidth, such as WiFi, by
> adding a mixer / downconverter.
>
> It's all Software Defined Radio, or "SDR". There are $20 USB dongles, but
> they lack the frequency range and bandwidth I'm talking about.

The dongles typically do 60MHz-1700MHz--I doubt that you'll do better
by hooking an ADC to the BBB. The dongles do it by having a front-end
tuner and specialized signal processor.

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[beagleboard] Beaglebone Camera Selection

[Jameel Khan]

Hey guys, 

New here. I am currently doing my final project at university and cannot 
decide on a camera to use. The camera is to be used to navigate the robot 
and detect blocks red, green, and blue. The previous person to work on the 
project sourced the following camera and I am currently debating whether or 
not to use 
it. 
http://store.linksprite.com/linksprite-jpeg-color-camera-serial-uart-interface-ttl-level/

My question is really should I be going with a TTL level serial 
communication camera or would it be easier/better to go with a usb camera 
like most people have with their robots. 

Cheers in advance,

Jameel 


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Re: [beagleboard] Re: Audio Cape and Debian

[John Syn]

From:  erg 
Reply-To:  
Date:  Sunday, May 11, 2014 at 3:58 PM
To:  
Subject:  [beagleboard] Re: Audio Cape and Debian

> I got mine from 
> http://boardzoo.com/index.php/new-products/bone-audio.html#.U2_-VFd7_uw
> boardzoo.com  Cost $29.95
> 
> Few other notes:
> 
> I will likely need to modify this board to include an audio amp to drive a
> speaker and an on-board mic.
Use amixer to modify the volume. Start with arecord and aplay to confirm
that your audio is working before using java.

If you have a microphone, play music from say your iPhone or Android device.
arecord -r 44100 -c 1 -f S16_LE -t wav -vv -d 25 example.wav
aplay example.wav

Regards,
John 
> 
> 
> I tried to play audio directly from Java - don't think it's gonna work without
> some indepth knowledge of the Linux and the Java audio.  My most likely
> solution will be to simply execute an external program (most likely madplay).
> aplay will only play wav files, I would rather use mp3 due to space.
> 
> I've installed maplay using
>  apt-get install madplay
> (i've tried mpg123 - but didn't seem to work and did not want to fight that
> battle 
> 
> Good luck.  I know very little of Linux, so this was a bit frustrating form
> me, I hope my notes help
> I'm not entirely sure yet, but think I will execute (from Java) lame to
> record.  
> 
> 
> 
> 
> 
> 
> On Sunday, May 11, 2014 11:06:25 AM UTC-4, Luís Costa wrote:
>> Hi,
>> 
>> where did you buy it? How much did it cost?
>> 
>> Cheers
>> 
>> On Friday, May 9, 2014 1:26:27 AM UTC+1, erg wrote:
>>> I know little of linux and not that up on audio, but in the process of
>>> building an app that uses both.  (Java app that works fine in windows).
>>> 
>>> I just bought the audio cape and a bit surprised at the lack of any docs or
>>> links to how-to.  In fact, not really sure which is the mic in and headphone
>>> out.
>>> 
>>> I'm sure this thing works, but not sure what I need to do to get it working.
>>> 
>>> Ive tried aplay, alsa, alsamixer and nothing seems to know the board is
>>> present. Using debian for the beagle board
>>> 
>>> 
>>> Is there some kind of configuration that is needed to make this work? Or, is
>>> there any docs for this board (Rev B) that explain what needs to be done?
>>> 
>>> Appreciate any help.
>>> 
>>> aplay -vv  file.wav   Seems to do something, but no audio from either of the
>>> ports.
>>> 
>>> 
>>> thx
>>> 
>>> e
> 
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[beagleboard] Re: path of least resistance to Debian

[Bruce Ferjulian]

Question_1: I personally like to run from the MicroSD. The eMMC is there if 
something goes wrong on the MicroSD and I need a quick edit on the MicroSD 
to get back running. An 8GB MicroSD card is very inexpensive these days and 
it's easier to just pop the MicroSD in a reader and ( dd if=/dev/MyMicroSD 
of=/MyBackup.img ) to create a backup or duplicate cards using DD in the 
reverse direction from my backup.

One note. Just to keep the MicroSD from writing too much when I am running, 
I placed this mountpoint in the [ /etc/fstab ] and write all my web stuff 
there. This way all my frequently written stuff goes there, it's temporary 
anyway but written frequently and ram is a good place for it.

tmpfs /ramfstmpfs defaults,size=20m 0 0


-Bruce-


On Friday, May 9, 2014 6:28:28 PM UTC-4, Brian Lloyd wrote:
>
> I am fairly certain that this has been answered but I have spent the last 
> two hours perusing the Wiki, the website, and the forums looking for a 
> definitive path to move my BBB from Angstrom to Debian. I am left with some 
> questions which I am pretty certain someone has already answered but I 
> still need pointers.
>
>1. Is it better to run Debian from MicroSD or from the eMMC?
>2. My native OS environment is MacOS. I have decompressed both Debian 
>images on my Mac. For the MicroSD it seems the easy way to write the image 
>is with dd using a 512-byte blocksize (one sector), right?
>3. Is there a way to write the eMMC image from MacOS? I'd rather not 
>have to boot up Windows if I can avoid it. (After all, we are trying to 
> run 
>linux and having to run Windows in order to do maintenance on a Linux 
>system just seems ... wrong.)
>4. Is there a way to write the eMMC image from the running BBB? Seems 
>that maybe I get it running from MicroSD and then rewrite the eMMC. 
>
> Thank you.
>
> Brian
>
>

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[beagleboard] Re: Audio Cape and Debian

[erg]

I got mine from 
http://boardzoo.com/index.php/new-products/bone-audio.html#.U2_-VFd7_uw  
boardzoo.com  Cost $29.95  

Few other notes:

I will likely need to modify this board to include an audio amp to drive a 
speaker and an on-board mic.  

I tried to play audio directly from Java - don't think it's gonna work 
without some indepth knowledge of the Linux and the Java audio.  My most 
likely solution will be to simply execute an external program (most likely 
madplay). 
aplay will only play wav files, I would rather use mp3 due to space.

I've installed maplay using 
 apt-get install madplay
(i've tried mpg123 - but didn't seem to work and did not want to fight that 
battle 

Good luck.  I know very little of Linux, so this was a bit frustrating form 
me, I hope my notes help 
I'm not entirely sure yet, but think I will execute (from Java) lame to 
record.  






On Sunday, May 11, 2014 11:06:25 AM UTC-4, Luís Costa wrote:
>
> Hi,
>
> where did you buy it? How much did it cost?
>
> Cheers
>
> On Friday, May 9, 2014 1:26:27 AM UTC+1, erg wrote:
>>
>> I know little of linux and not that up on audio, but in the process of 
>> building an app that uses both.  (Java app that works fine in windows).  
>>
>> I just bought the audio cape and a bit surprised at the lack of any docs 
>> or links to how-to.  In fact, not really sure which is the mic in and 
>> headphone out.
>>
>> I'm sure this thing works, but not sure what I need to do to get it 
>> working.
>>
>> Ive tried aplay, alsa, alsamixer and nothing seems to know the board is 
>> present. Using debian for the beagle board
>>
>>
>> Is there some kind of configuration that is needed to make this work? Or, 
>> is there any docs for this board (Rev B) that explain what needs to be done?
>>
>> Appreciate any help.
>>
>> aplay -vv  file.wav   Seems to do something, but no audio from either of 
>> the ports.
>>
>>
>> thx
>>
>> e
>>
>

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[beagleboard] Re: Beginner PRU Issue

[foreverska]

You have responded to this at a fortuitous time.  I JUST got it working on 
an example code.
- I edited the device tree turning on the PRUSS system and turning off the 
status lights
- modprobe uio_pruss
- sudo ./[program name]
and boom it started blinking just as it should.  Now it doesn't exit 
properly and I will have to play with the clear_event() to see if that's 
the root but I'm very happy with it right this second.

On Sunday, May 11, 2014 3:38:36 PM UTC-5, CEB wrote:
>
> "It stopped segfaulting when I sudoed the program so I copied in the whole 
> code.  The compiler complains that there aren't enough parameters for 
> prussdrv_pru_clear_event.  The header does have two parameters but all 
> other TI documentation only has one.  If I just throw a zero as the second 
> parameter it will run but does nothing because who knows what I'm doing. "
>
>
> - show quoted text -
> In several examples I see:prussdrv_pru_clear_event (PRU_EVTOUT_0, 
> PRU0_ARM_INTERRUPT);
>
> I'm trying to get a feel for this too.  Maybe this will help.
>
>
>
>

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[beagleboard] Re: Beginner PRU Issue

[CEB]

"It stopped segfaulting when I sudoed the program so I copied in the whole 
code.  The compiler complains that there aren't enough parameters for 
prussdrv_pru_clear_event.  The header does have two parameters but all 
other TI documentation only has one.  If I just throw a zero as the second 
parameter it will run but does nothing because who knows what I'm doing. "


- show quoted text -
In several examples I see:prussdrv_pru_clear_event (PRU_EVTOUT_0, 
PRU0_ARM_INTERRUPT);

I'm trying to get a feel for this too.  Maybe this will help.



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Re: [beagleboard] help remove virtual terminals in debian

[Maxim Podbereznyy]

done!

https://help.ubuntu.com/community/RemoveTTY



2014-05-12 0:04 GMT+04:00 Maxim Podbereznyy :

> here is the cmdline:
> console=ttyO2,115200n8 quiet root=/dev/mmcblk0p2 ro rootfstype=ext4
> rootwait fixrtc dvimode=hd720
>
> what should I remove?
>
>
> 2014-05-11 23:48 GMT+04:00 Robert Nelson :
>
> On Sun, May 11, 2014 at 2:46 PM, Maxim Podbereznyy 
>> wrote:
>> > Robert,
>> >
>> > I don't want to remove the console (I think removing "console=ttyXY"
>> from
>> > bootargs will break the console at all), just the virtual terminals
>> >
>> > have just tried to add "quiet" and got rid off the system boot log and
>> the
>> > fancy virtual terminal on the display still appears. I need to remove
>> all
>> > text from the display, just GUI is needed on it
>>
>> You it should be safe to remove console=tty0 then you won't get any
>> boot text on your lcd/dvi screen
>>
>> Regards,
>>
>> --
>> Robert Nelson
>> http://www.rcn-ee.com/
>>
>> --
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>>
>
>
>
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>



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Re: [beagleboard] help remove virtual terminals in debian

[Maxim Podbereznyy]

here is the cmdline:
console=ttyO2,115200n8 quiet root=/dev/mmcblk0p2 ro rootfstype=ext4
rootwait fixrtc dvimode=hd720

what should I remove?


2014-05-11 23:48 GMT+04:00 Robert Nelson :

> On Sun, May 11, 2014 at 2:46 PM, Maxim Podbereznyy 
> wrote:
> > Robert,
> >
> > I don't want to remove the console (I think removing "console=ttyXY" from
> > bootargs will break the console at all), just the virtual terminals
> >
> > have just tried to add "quiet" and got rid off the system boot log and
> the
> > fancy virtual terminal on the display still appears. I need to remove all
> > text from the display, just GUI is needed on it
>
> You it should be safe to remove console=tty0 then you won't get any
> boot text on your lcd/dvi screen
>
> Regards,
>
> --
> Robert Nelson
> http://www.rcn-ee.com/
>
> --
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Re: [beagleboard] help remove virtual terminals in debian

[Robert Nelson]

On Sun, May 11, 2014 at 2:46 PM, Maxim Podbereznyy  wrote:
> Robert,
>
> I don't want to remove the console (I think removing "console=ttyXY" from
> bootargs will break the console at all), just the virtual terminals
>
> have just tried to add "quiet" and got rid off the system boot log and the
> fancy virtual terminal on the display still appears. I need to remove all
> text from the display, just GUI is needed on it

You it should be safe to remove console=tty0 then you won't get any
boot text on your lcd/dvi screen

Regards,

-- 
Robert Nelson
http://www.rcn-ee.com/

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Re: [beagleboard] help remove virtual terminals in debian

[Maxim Podbereznyy]

Robert,

I don't want to remove the console (I think removing "console=ttyXY" from
bootargs will break the console at all), just the virtual terminals

have just tried to add "quiet" and got rid off the system boot log and the
fancy virtual terminal on the display still appears. I need to remove all
text from the display, just GUI is needed on it


2014-05-11 23:38 GMT+04:00 Robert Nelson :

> On Sun, May 11, 2014 at 2:36 PM, Maxim Podbereznyy 
> wrote:
> > Hi!
> >
> > I use Beagleboard with installed bare Debian from RCN. My main
> application
> > is in Qt and it works as expected but the virtual terminal is very
> > disturbing. When the system boots I can see a number of annoying
> messages on
> > a display and that is why I want to remove virtual terminal forever. I
> tried
> > Ubuntu nano and Debian and everywhere virtual terminals exist. Please
> advise
> > something
>
> First start by adding "quiet" to your bootargs, along with removing
> the console=ttyXYZ reference, should quiet down your terminal.
>
> Regards,
>
> --
> Robert Nelson
> http://www.rcn-ee.com/
>
> --
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Re: [beagleboard] help remove virtual terminals in debian

[Robert Nelson]

On Sun, May 11, 2014 at 2:36 PM, Maxim Podbereznyy  wrote:
> Hi!
>
> I use Beagleboard with installed bare Debian from RCN. My main application
> is in Qt and it works as expected but the virtual terminal is very
> disturbing. When the system boots I can see a number of annoying messages on
> a display and that is why I want to remove virtual terminal forever. I tried
> Ubuntu nano and Debian and everywhere virtual terminals exist. Please advise
> something

First start by adding "quiet" to your bootargs, along with removing
the console=ttyXYZ reference, should quiet down your terminal.

Regards,

-- 
Robert Nelson
http://www.rcn-ee.com/

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[beagleboard] help remove virtual terminals in debian

[Maxim Podbereznyy]

Hi!

I use Beagleboard with installed bare Debian from RCN. My main application
is in Qt and it works as expected but the virtual terminal is very
disturbing. When the system boots I can see a number of annoying messages
on a display and that is why I want to remove virtual terminal forever. I
tried Ubuntu nano and Debian and everywhere virtual terminals exist. Please
advise something

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[beagleboard] Re: How to find DDR physical address for passing data to/from pruss?

[ags]

A shortened version of this question, which I really want to understand for 
this specific project and as general learning for use of Linux in embedded 
systems:

What is the correct way to correctly use memory in userspace to access 
registers and memory used by device drivers (specifically the PRU in this 
case)?

Is the example provided correct, both the app_loader "helper" code and/or 
the example applications? They seem to be inconsistent with one another?

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Re: [beagleboard] Power switch for Beaglebone?

[Grant]

> Like a FET or a Solid State Relay ??
>
> http://www.packtpub.com/building-a-home-security-system-with-beaglebone/book


I'm not sure.  I'm just looking for a small component I can plug
between the Beaglebone and power cable without any soldering.

- Grant


> Is there a simple passive switch I can put between the Beaglebone White and 
> its power supply so I can switch it on and off without unplugging it?
>
> - Grant

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RE: [beagleboard] Power switch for Beaglebone?

[William Pretty Security]

Like a FET or a Solid State Relay ??

http://www.packtpub.com/building-a-home-security-system-with-beaglebone/book


-Original Message-
From: beagleboard@googlegroups.com [mailto:beagleboard@googlegroups.com] On 
Behalf Of Grant
Sent: Sunday, May 11, 2014 11:18 AM
To: beagleboard@googlegroups.com
Subject: [beagleboard] Power switch for Beaglebone?

Is there a simple passive switch I can put between the Beaglebone White and its 
power supply so I can switch it on and off without unplugging it?

- Grant

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-
No virus found in this message.
Checked by AVG - www.avg.com
Version: 2014.0.4577 / Virus Database: 3931/7474 - Release Date: 05/11/14

-
No virus found in this message.
Checked by AVG - www.avg.com
Version: 2014.0.4577 / Virus Database: 3931/7433 - Release Date: 05/02/14 
Internal Virus Database is out of date.

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Re: [beagleboard] BeagleBoard Data Acquisition Platform

[sa_Penguin]

Aah now I see. Using multiple channels to search for signals buried in 
noise.
Like the phase array of antennas used in the WERA radar system: 
http://www.aslenv.com/WERA.html

Whereas my own desires are based on the Red Pitaya: http://redpitaya.com
A lovely bit of kit, if you can spare $500+ and don't mind Yet Another ARM 
Processor [built into the FPGA chip]...

For more modest requirements, this should be do-able as an extension to the 
Beaglebone series.
A quick check of TI's selection table found the 
ADS4145and ADS4245 [1 and 2 channel version, 
125M, 14-bit]. 
Analog Devices have the 
AD9648-125,
 
and Linear Technology have the 
LTC2145-14. 
 
Feel free to look them up if you're curious about how they work: I consider 
much of that "magic smoke"

As for WHY I want one - primarily, RF signal analysis. 120 Msample/sec lets 
you grab from DC to 30MHz, with simple filtering.
You can also monitor FM bands [88-108MHz] which fall in the 2nd Nyquist 
sample zone and get "reflected" down to 12 - 32 MHz
Oh, and amateur radio and weather satellites, in the band 140 - 150 MHz, 
can be under sampled at 25 - 30MHz.
   
Not to mention being able to cover 40MHz of bandwidth, such as WiFi, by 
adding a mixer / downconverter. 

It's all Software Defined Radio, or "SDR". There are $20 USB dongles, but 
they lack the frequency range and bandwidth I'm talking about.

Regards,

-- Alan [SA-Penguin]

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[beagleboard] Power switch for Beaglebone?

[Grant]

Is there a simple passive switch I can put between the Beaglebone
White and its power supply so I can switch it on and off without
unplugging it?

- Grant

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[beagleboard] Re: Audio Cape and Debian

[Luís Costa]

Hi,

where did you buy it? How much did it cost?

Cheers

On Friday, May 9, 2014 1:26:27 AM UTC+1, erg wrote:
>
> I know little of linux and not that up on audio, but in the process of 
> building an app that uses both.  (Java app that works fine in windows).  
>
> I just bought the audio cape and a bit surprised at the lack of any docs 
> or links to how-to.  In fact, not really sure which is the mic in and 
> headphone out.
>
> I'm sure this thing works, but not sure what I need to do to get it 
> working.
>
> Ive tried aplay, alsa, alsamixer and nothing seems to know the board is 
> present. Using debian for the beagle board
>
>
> Is there some kind of configuration that is needed to make this work? Or, 
> is there any docs for this board (Rev B) that explain what needs to be done?
>
> Appreciate any help.
>
> aplay -vv  file.wav   Seems to do something, but no audio from either of 
> the ports.
>
>
> thx
>
> e
>

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[beagleboard] Re: Bone VDD_3V3EXP Disable Issues

[Darren McInnes]

On Friday, January 31, 2014 4:34:51 AM UTC+11, Brad Andersen wrote:
>
> An update:
>
> For the A6 (Beaglebone Black) version, I connected U4 pin 1 (enable) back 
> to VDD_3V3AUX (same as A5C).  It now shuts down correctly while on 
> battery.  This was verified on two A6 BBB.
>
> The mystery is what causes the VDD_3V3A to hang up on the A6 version when 
> shutting down while on battery.
>

Brad,

Thank you for this post. I thought I was going madder than usual when the 
production units wouldn't turn off but the prototypes did!

all it required was lifting pin 1 of U4 and soldering a wire-wrap wire to 
the power led anode (side furthest from the edge of the board)

you have as they say "saved my bacon"

Best Wishes,

Darren

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Re: [beagleboard] Audio Cape and Debian

[erg]

Well, what ever I did, I fixed when I only disabled BB-BONELT-HDM  (rather 
than both).

Things are working well now.  Thanks so much for the help.



On Saturday, May 10, 2014 6:28:42 PM UTC-4, john3909 wrote:
>
>
> From: erg >
> Reply-To: >
> Date: Saturday, May 10, 2014 at 11:08 AM
> To: >
> Subject: Re: [beagleboard] Audio Cape and Debian
>
> getting closer but not quite there.
>
> To get the version information  lsb_release -a  return 
> root@beaglebone:~# lsb_release -a
> No LSB modules are available.
> Distributor ID: Debian
> Description:Debian GNU/Linux 7.4 (wheezy)
> Release:7.4
> Codename:   wheezy
>
>
>
> Step 1 copy the audio device tree overlay (source) to  /lib/firmware
> Step 2 copile the device tree overlay - good instructions here 
> https://learn.adafruit.com/introduction-to-the-beaglebone-black-device-tree?view=all#compiling-an-overlay
>dtc -O dtb -o  BB-BONE-AUDI-02-00A0.dtbo  -b 0 -@ 
> BB-BONE-AUDI-02-00A0.dts
>
> Step 3 export SLOTS=/sys/devices/bone_capemgr.*/slots
> echo BB-BONE-AUDI-02 > $SLOTS   
> This will produce an error
> -bash: echo: write error: File exists
> 
> issue the command "dmesg" to see what kind of error this causes
>
>  
> 666.089997] bone-capemgr bone_capemgr.9: slot #7: 'Override Board 
> Name,00A0,Override Manuf,BB-BONE-AUDI-02'
> [  666.090265] bone-capemgr bone_capemgr.9: slot #7: Requesting part 
> number/version based 'BB-BONE-AUDI-02-00A0.dtbo
> [  666.090319] bone-capemgr bone_capemgr.9: slot #7: Requesting firmware 
> 'BB-BONE-AUDI-02-00A0.dtbo' for board-name 'Override Board Name', version 
> '00A0'
> [  666.097465] bone-capemgr bone_capemgr.9: slot #7: dtbo 
> 'BB-BONE-AUDI-02-00A0.dtbo' loaded; converting to live tree
> [  666.098183] bone-capemgr bone_capemgr.9: slot #7: BB-BONE-AUDI-02 
> conflict P9.31 (#5:BB-BONELT-HDMI)
> [  666.107973] bone-capemgr bone_capemgr.9: slot #7: Failed verification
>
>
>
>
> This error state there is a conflict with BB-BONELT-HDMI  
>
> need to disable that 
>
> nano /boot/uboot/uEnv.txt
> optargs=capemgr.disable_partno=BB-BONELT-HDMI,BB-BONELT-HDMIN
>
> Remove the # from in front of this line
>
> Audio now works
>
> BUT
>
> *The sd card is no longer there.  *
>
> What I would really like is for the SD card AND audio to work.
>
> BTW, you only need to disable BB-BONELT-HDMI. BB-BONELT-HDMIN will not 
> conflict with your audio cape. I can only imagine that you must have some 
> typo in uEnv.txt, because nothing you did will affect the SDCard. Maybe you 
> should recreate your SDCard and update the uEnv.txt file on the boot 
> partition of the SDCard. 
>
> Regards,
> John
>
>
>
> Again - thanks for the help, 
>
> On Saturday, May 10, 2014 1:09:10 AM UTC-4, john3909 wrote:
>>
>>
>> From: erg 
>> Reply-To: 
>> Date: Friday, May 9, 2014 at 5:29 PM
>> To: 
>> Subject: Re: [beagleboard] Audio Cape and Debian
>>
>> I appreciate the response - but how in the world do you install a device 
>> tree?  Been searching all over the place and find billions of references to 
>> how to compile one, but struggling with what to do with the one that is 
>> already compiled.  
>>
>> Also - the very limited docs seem to indicate this is already installed  
>>>
>>> The current Debian images have the required patches and will play audio 
 normally.
>>>
>>>
>> there are zero other docs to help someone that just wants to use this 
>> rather than become a linux guru.  
>>
>> Since you did not specify your kernel version, it is hard to respond. 
>> However, assuming you are using V3.8.13, do the following:
>>
>> Make sure the compiled BB-BONE-AUDI-02-00A0.dtbo file is installed under 
>> the /firmware folder
>>
>> export SLOTS=/sys/devices/bone_capemgr.*/slots
>> echo BB-BONE-AUDI-02 > $SLOTS
>>
>> If you want to enable the Audio DT permanently, add it to your uEnv.txt 
>> file. 
>>
>> Regards,
>> John
>>
>>
>>
>> On Thursday, May 8, 2014 10:40:19 PM UTC-4, john3909 wrote:
>>>
>>>
>>> From: erg 
>>> Reply-To: 
>>> Date: Thursday, May 8, 2014 at 5:26 PM
>>> To: 
>>> Subject: [beagleboard] Audio Cape and Debian
>>>
>>> I know little of linux and not that up on audio, but in the process of 
>>> building an app that uses both.  (Java app that works fine in windows).  
>>>
>>> I just bought the audio cape and a bit surprised at the lack of any docs 
>>> or links to how-to.  In fact, not really sure which is the mic in and 
>>> headphone out.
>>>
>>> I'm sure this thing works, but not sure what I need to do to get it 
>>> working.
>>>
>>> Ive tried aplay, alsa, alsamixer and nothing seems to know the board is 
>>> present. Using debian for the beagle board
>>>
>>>
>>> Is there some kind of configuration that is needed to make this work? 
>>> Or, is there any docs for this board (Rev B) that explain what needs to be 
>>> done?
>>>
>>> Appreciate any help.
>>>
>>> aplay -vv  file.wav   Seems to do something, but no audio from either of 
>>> the ports.
>>>
>>>
>>> What kernel versi

Re: [beagleboard] Re: Beaglebone keeps shutting down when trying to drive a motor

[Przemek Klosowski]

It all depends on what the ESC current is. The current spec for GPIO
is not a suggestion, but an absolute maximum value; if you exceed it,
all bets are off (reset is actually a polite thing to do---permanent
pin buffer damage can also happen, as well as wider damage to the
chip).

On Sun, May 11, 2014 at 2:32 AM, Uncle Joe  wrote:
> Well, I've overcome the problem. I was using a GPIO as GND to the ESC. This
> was convenient since those pins are next to each other. Once I used true
> GND, then the problem went away.
>
> But why would using a GPIO as a GND cause a shutdown? I know it will
> restrict the amount of current sinked due to having to flow through an extra
> FET.
>
>
> On Saturday, May 10, 2014 9:38:55 PM UTC-7, Uncle Joe wrote:
>>
>> Help, I'm struggling to drive a simple ESC and brushless motor combination
>> with the Beaglebone. I've already spent 1/2 a day figuring out the right
>> arming sequence (caused by a +- 0.01 ms error in timing).
>>
>> But once I arm the ESC, the Beaglebone shuts off immediately. Most of the
>> time, it shuts off right when it starts spinning up. Sometimes it even shuts
>> off on one of the beeps the motor makes indicating the ESC is arming.
>>
>> Here's my setup:
>> Revolver Stubby motor
>> ||
>> ||
>> 850W PSU  =12V=  ESC   ===3.3V=== BeagleBone
>>
>> The PSU is an Antec 850 high current gamer. I've disabled over-current,
>> over-voltage, and under-voltage protection on it, so the power draw can be
>> alot (enough to make the lights flicker when the motor starts).
>>
>>
>> The BeagleBone is powered by USB and should be buffered against surges
>> caused by the motor PSU.
>> What could be the problem?
>>
>>
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[beagleboard] BeagleBoard-xm does not show captured image

[Shanal Beedkar]

Hi,
I am designing system to detect Eye blink using OpenCV on Beagle board 
xm.code can execute efficiently on laptop but unable to show web cam's 
output on screen.
It can print text message (mentioned in code )on terminal. but unable to 
show as input video string. 
can any body please help me?
 *Is *problem  with my code or with my board ?
and How can I solve it?
 

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Re: [beagleboard] path of least resistance to Debian

[John Syn]

From:  William Hermans 
Reply-To:  
Date:  Saturday, May 10, 2014 at 8:08 PM
To:  
Subject:  Re: [beagleboard] path of least resistance to Debian

> Well John, this is why people like me research hardware to use with various
> OSes, and distro's Unlike Windows that can almost have any hardware tossed at
> it ( whether it works well or not ), Linux, or specifically Debian in this
> case can be very finicky.
Windows, really? Talking about a flaky OS and let¹s not talk about all those
patches that I have to wait 5 or 15 minutes every day when I boot and then
when I shutdown and all those reboots for upgrades. Windows is a piece of
crap, period. I only use windows because some of the tools I use only run on
Windows, but if I could ditch it, I would.

I use OSX and everything just works. One of these days I¹m going to get the
Linaro ARM cross compiler working and then I¹ll ditch Ubuntu as well.
> 
> 
> I dont recall what the topic was of the Video, but if you search youtube for
> Linus torvalds + F*** nVidia . . . Yeah lets just say you might be mildly
> amused. nVidia in the past and probably still does not play nice with the open
> source community.
I changed from ATI because of driver issues and nVidia open source driver
works find with Ubuntu.
> 
> 
> As far as the older kernel goes. Debian is known to move slower and more
> purposeful when compared to other distro;s.  And as a result is generally
> very, very stable. However, because of this, also generally you need to pay
> attention to supported hardware.
You are right about this, Debian is rock solid. I did try the testing repo
and that looks pretty stable as well. My only hesitation is that I¹m not
that familiar with all the repos I need and I don¹t have the time to
research this right now.
> 
> 
> 
> On Sat, May 10, 2014 at 2:59 PM, John Syn  wrote:
>> 
>> From:  William Hermans 
>> Reply-To:  
>> Date:  Saturday, May 10, 2014 at 12:39 AM
>> 
>> To:  
>> Subject:  Re: [beagleboard] path of least resistance to Debian
>> 
>>> I can not disagree more with John on this last point. If you need a support
>>> system for Debian, use Debian as the support system. Also, stay away from
>>> using X, and Window managers if you can help it.
>> I wasn¹t suggesting that anyone use Ubuntu for development, I was just
>> describing my own setup. BTW, I did try Debian Wheezy and it didn¹t go very
>> well. First my Nvidia GTX670 didn¹t work with the open source driver given
>> that I have 3 x 30 inch Dell monitors. I was somewhat surprised that Debian
>> is still using Linux Kernel V3.2 and I had to hunt around for so many
>> repositories to get just the basic tools I need. I¹m no fan of Ubuntu, but
>> for now it does the job for me and I¹m familiar with it. One more thing,
>> developing on Windows is a nightmare given NTFS which is case insensitive.
>> 
>> Regards,
>> John
>>> 
>>> 
>>> Cross compiling from Windows does work, I've had this working since early
>>> on, but for most ( some ? ) people this is probably less than optimal.
>>> Definitely if you're using OSX as your desktop.
>>> 
>>> 
>>> On Fri, May 9, 2014 at 9:51 PM, John Syn  wrote:
 
 From:  Brian Lloyd 
 Reply-To:  
 Date:  Friday, May 9, 2014 at 6:51 PM
 To:  
 Subject:  Re: [beagleboard] path of least resistance to Debian
 
> On Fri, May 9, 2014 at 5:42 PM, William Hermans  wrote:
>> #1 Personally I would run from a uSD card to make sure it is what you
>> want. Plus it doesnt hurt to run from the sd card, unless you do not have
>> a uSD card + sd card adapter, and do not care to spend money on this.
> 
> I have a 16GB uSD card to run from. Just wondering what the pros and cons
> are. Seems that the cons are worry that the eMMC will reach its write
> limit. I don't think that will be an issue for my application as I intend
> to use the BBB as an embedded system. (See below.)
>  
>> 
>> #2 I'll defer to someone else, as I am not a MAC person.
> 
> Mac is just FreeBSD once you are in the shell (for the most part). There
> are worse places to be. ;-)
 There are some incompatibilities with OSX, but if you use ³MacPort² or
 ³HomeBrew² or ³Fink² to get the GNU tool versions. Since the GNU version
 are the same as Debian or Ubuntu, the same instructions will work on Mac.
>  
>> 
>> #3 NO idea where you got this impression. All the instructions I've seen
>> are *NIX based, and I *DO* personally run Windows for my own desktop
>> environment.
> 
> I couldn't find any instructions other than for doing it from Windows
> until I was pointed to the Adafruit site.
>  
>> 
>> #4 You would have to boot up via uSD to write out the eMMC I believe.
>  
> I now have Debian running from the uSD card and it is working just peachy.
> Attempts to copy the eMMC version to the eMMC didn't work but I only want
> that as a backup to the uSD. Eventually I will probably want to