[beagleboard] Connection problems and questions

[Jim Hodgers]

Last night I was working on my BBB, using SSH with putty and VNC.  I had to 
reboot to test a script and when it came back both vnv and putty failed to 
connect. I cycled power several times but each time there was no connection 
except it showed up as a usb device in windows explorer. Since it was late 
I shut everything down ans started back this morning. When I powered up 
everything worked. Why does this happen? I also wonder about the choice of 
connman, this seems way to complicated for such a small board. Also I would 
like to change the screen size in  x11vnc, but can not figure out how.

Jim

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[beagleboard] Cross compile instructions for MT7601U (Logic Supply UWN200) Kernel Module for Beagles running Ubuntu

[Corey McGuire]

Hey all,

Here's my "Cross compile instructions for MT7601U (Logic Supply
UWN200)
Kernel Module for Beagles running Ubuntu"

Been searching for a decent Wireless Adapter (that MIGHT have a product
life cycle longer than that of a fruit fly) to include with a product I am
developing on embedded arm systems.

Right now, the UWN200 (MT7601U) from Logic Supply is fitting the bill.

I have found instructions on how to build the MT7601U driver natively on
the Beaglebone, but that's just silly.  I am developing for the Beaglebone,
but I don't want to BUILD on the Beaglebone.

These are the steps I've taken to successfully build and use the MT7601U
module under Linux on an ARM system.  They may be unclear, unrefined,
unorganized, and quite possibly unintelligible, but since the question
"How-to" seems to be asked a lot and hasn't been answered (I had to figure
this out all my self ;-) I thought I would post my steps.

I am interested in further refining this howto because I think this is a
killer component combo.

So far, I have gotten this adapter to connect to a WPA2 network on boot and
operate for 12 hours straight.

Enjoy!

 Cross compile instructions for MT7601U (Logic Supply) Kernel Module for
Beagles running
Ubuntu

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Re: [beagleboard] QT5.1.1 running on BeagleBoneBlack

[John Syne]

On 12/20/13, 2:49 PM, "Robert Nelson"  wrote:
>>
>> yeap, but that sucks, was hoping it would be more useful.. Maybe in
>> the next release.  At least qt/eglfs users can use it.
>
>Or if the lxde -> lxde-qt port would finish. ;)
I didn¹t know about this. Looks great. I wonder if they are using wayland?
>
>Regards,
>
>-- 
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>http://www.rcn-ee.com/
>
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Re: [beagleboard] QT5.1.1 running on BeagleBoneBlack

[John Syne]

On 12/20/13, 2:48 PM, "Robert Nelson"  wrote:

make BUILD=release OMAPES=8.x PM_RUNTIME=1 all
sudo make BUILD=release OMAPES=8.x PM_RUNTIME=1 all install
>>>Hi Robert,
>>>
>>>Yep, that was the problem. If you look at Prathap Srinivas E2E post on
>>>Nov
>>>5, he doesn¹t use xorg support. I change the make line in your script,
>>>and
>>>now it builds without error.
>> Hi Robert,
>>
>> So, line 602 should read:
>> build_sgx_modules release 8.x no 0 1 all
>
>yeap, but that sucks, was hoping it would be more useful.. Maybe in
>the next release.  At least qt/eglfs users can use it.
That is all I needed for now, so I¹m happy, but if this worked on 3.8, I
would be even more happy.
>
>-- 
>Robert Nelson
>http://www.rcn-ee.com/
>
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Re: [beagleboard] QT5.1.1 running on BeagleBoneBlack

[Robert Nelson]

On Fri, Dec 20, 2013 at 4:48 PM, Robert Nelson  wrote:
make BUILD=release OMAPES=8.x PM_RUNTIME=1 all
sudo make BUILD=release OMAPES=8.x PM_RUNTIME=1 all install
>>>Hi Robert,
>>>
>>>Yep, that was the problem. If you look at Prathap Srinivas E2E post on Nov
>>>5, he doesn’t use xorg support. I change the make line in your script, and
>>>now it builds without error.
>> Hi Robert,
>>
>> So, line 602 should read:
>> build_sgx_modules release 8.x no 0 1 all
>
> yeap, but that sucks, was hoping it would be more useful.. Maybe in
> the next release.  At least qt/eglfs users can use it.

Or if the lxde -> lxde-qt port would finish. ;)

Regards,

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

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Re: [beagleboard] QT5.1.1 running on BeagleBoneBlack

[Robert Nelson]

>>>make BUILD=release OMAPES=8.x PM_RUNTIME=1 all
>>>sudo make BUILD=release OMAPES=8.x PM_RUNTIME=1 all install
>>Hi Robert,
>>
>>Yep, that was the problem. If you look at Prathap Srinivas E2E post on Nov
>>5, he doesn’t use xorg support. I change the make line in your script, and
>>now it builds without error.
> Hi Robert,
>
> So, line 602 should read:
> build_sgx_modules release 8.x no 0 1 all

yeap, but that sucks, was hoping it would be more useful.. Maybe in
the next release.  At least qt/eglfs users can use it.

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

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Re: [beagleboard] QT5.1.1 running on BeagleBoneBlack

[John Syne]

On 12/20/13, 2:33 PM, "John Syne"  wrote:

>
>On 12/20/13, 2:16 PM, "John Syne"  wrote:
>
>>
>>On 12/20/13, 12:50 PM, "Robert Nelson"  wrote:
>>>
>>>That change is actually buried in the initial 5.00.00.01 commit, i
>>>need to refactor that change back out..
>>Hi Robert,
>>
>>I don¹t seem to be making the modules you are. I have attached my SGX
>>make
>>log. 
>>
>>My make commands are:
>>
>>make BUILD=release OMAPES=8.x PM_RUNTIME=1 all
>>sudo make BUILD=release OMAPES=8.x PM_RUNTIME=1 all install
>Hi Robert,
>
>Yep, that was the problem. If you look at Prathap Srinivas E2E post on Nov
>5, he doesn’t use xorg support. I change the make line in your script, and
>now it builds without error.
Hi Robert,

So, line 602 should read:
build_sgx_modules release 8.x no 0 1 all

Regards,
John

>
>Regards,
>John
>
>>
>>BTW, your build is failing when it builds drm, but my build doesn¹t build
>>drm.  
>>
>>When I run QT applications, I use the eglfs platform.
>>
>>Regards, 
>>John
>>>
>>>Regards,
>>>
>>>-- 
>>>Robert Nelson
>>>http://www.rcn-ee.com/
>>>
>>>-- 
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>>
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>
>
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Re: [beagleboard] QT5.1.1 running on BeagleBoneBlack

[John Syne]

On 12/20/13, 2:16 PM, "John Syne"  wrote:

>
>On 12/20/13, 12:50 PM, "Robert Nelson"  wrote:
>>
>>That change is actually buried in the initial 5.00.00.01 commit, i
>>need to refactor that change back out..
>Hi Robert,
>
>I don¹t seem to be making the modules you are. I have attached my SGX make
>log. 
>
>My make commands are:
>
>make BUILD=release OMAPES=8.x PM_RUNTIME=1 all
>sudo make BUILD=release OMAPES=8.x PM_RUNTIME=1 all install
Hi Robert,

Yep, that was the problem. If you look at Prathap Srinivas E2E post on Nov
5, he doesn’t use xorg support. I change the make line in your script, and
now it builds without error.

Regards,
John

>
>BTW, your build is failing when it builds drm, but my build doesn¹t build
>drm.  
>
>When I run QT applications, I use the eglfs platform.
>
>Regards, 
>John
>>
>>Regards,
>>
>>-- 
>>Robert Nelson
>>http://www.rcn-ee.com/
>>
>>-- 
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Re: [beagleboard] QT5.1.1 running on BeagleBoneBlack

[John Syne]

On 12/20/13, 12:50 PM, "Robert Nelson"  wrote:

>On Fri, Dec 20, 2013 at 2:44 PM, John Syne  wrote:
>>
>>
>> On 12/20/13, 12:32 PM, "Robert Nelson"  wrote:
>>
>>>On Fri, Dec 20, 2013 at 2:30 PM, Robert Nelson 
>>>wrote:
> Hi Robert,
>
> I see that sgx_build_modules.sh isn¹t working. I¹ll work on fixing
>the
> problem?

 Other then building the modules, I'm not sure anything else is correct
yet. ;)
>>>
>>>btw, I'd like to really integrate the sgx driver into the staging
>>>tree, like we did in the 2.6.32 day's, then end users only have to run
>>>a script on x86 to extrace the important bits, no kernel module
>>>building.. (you can see my hacks in the sgx-blob directory..)
>> Yeah, I saw that last night. Excellent idea.
>>
>> BTW, it looks like you missed the Kbuild patch in
>> services4/3rdparty/linux_drm/Kbuild
>
>That change is actually buried in the initial 5.00.00.01 commit, i
>need to refactor that change back out..
Ah, now I see what you’re doing. OK, so the patched Kbuild is in
ignore/ti-sdk-pvr/Graphics_SDK/GFX_Linux_KM/service4/3rdparty/linux_drm/Kbu
ild

Why don’t you just update make.rules and then "make x x x", "make x x x
install" like normal?
>
>Regards,
>
>-- 
>Robert Nelson
>http://www.rcn-ee.com/
>
>-- 
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Re: [beagleboard] QT5.1.1 running on BeagleBoneBlack

[Robert Nelson]

On Fri, Dec 20, 2013 at 2:44 PM, John Syne  wrote:
>
>
> On 12/20/13, 12:32 PM, "Robert Nelson"  wrote:
>
>>On Fri, Dec 20, 2013 at 2:30 PM, Robert Nelson 
>>wrote:
 Hi Robert,

 I see that sgx_build_modules.sh isn¹t working. I¹ll work on fixing the
 problem?
>>>
>>> Other then building the modules, I'm not sure anything else is correct
>>>yet. ;)
>>
>>btw, I'd like to really integrate the sgx driver into the staging
>>tree, like we did in the 2.6.32 day's, then end users only have to run
>>a script on x86 to extrace the important bits, no kernel module
>>building.. (you can see my hacks in the sgx-blob directory..)
> Yeah, I saw that last night. Excellent idea.
>
> BTW, it looks like you missed the Kbuild patch in
> services4/3rdparty/linux_drm/Kbuild

That change is actually buried in the initial 5.00.00.01 commit, i
need to refactor that change back out..

Regards,

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

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[beagleboard] BeagleBone Black Based Christmas Tree

[Mark A. Yoder]

The Rose-Hulman ECE department's Christmas tree's lights are controlled by 
a Beagle Bone Black.  You can check it out here http://youtu.be/4BbRNn3VadA 

--Mark

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Re: [beagleboard] QT5.1.1 running on BeagleBoneBlack

[John Syne]

On 12/20/13, 12:32 PM, "Robert Nelson"  wrote:

>On Fri, Dec 20, 2013 at 2:30 PM, Robert Nelson 
>wrote:
>>> Hi Robert,
>>>
>>> I see that sgx_build_modules.sh isn¹t working. I¹ll work on fixing the
>>> problem?
>>
>> Other then building the modules, I'm not sure anything else is correct
>>yet. ;)
>
>btw, I'd like to really integrate the sgx driver into the staging
>tree, like we did in the 2.6.32 day's, then end users only have to run
>a script on x86 to extrace the important bits, no kernel module
>building.. (you can see my hacks in the sgx-blob directory..)
Yeah, I saw that last night. Excellent idea.

BTW, it looks like you missed the Kbuild patch in
services4/3rdparty/linux_drm/Kbuild

Regards,
John
>
>Regards,
>
>-- 
>Robert Nelson
>http://www.rcn-ee.com/
>
>-- 
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Re: [beagleboard] QT5.1.1 running on BeagleBoneBlack

[John Syne]

On 12/20/13, 12:30 PM, "Robert Nelson"  wrote:

>> Hi Robert,
>>
>> I see that sgx_build_modules.sh isn¹t working. I¹ll work on fixing the
>> problem?
>
>Other then building the modules, I'm not sure anything else is correct
>yet. ;)
No problem. I’ll fix it for you.
>
>Regards,
>
>-- 
>Robert Nelson
>http://www.rcn-ee.com/
>
>-- 
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Re: [beagleboard] QT5.1.1 running on BeagleBoneBlack

[Robert Nelson]

On Fri, Dec 20, 2013 at 2:30 PM, Robert Nelson  wrote:
>> Hi Robert,
>>
>> I see that sgx_build_modules.sh isn¹t working. I¹ll work on fixing the
>> problem?
>
> Other then building the modules, I'm not sure anything else is correct yet. ;)

btw, I'd like to really integrate the sgx driver into the staging
tree, like we did in the 2.6.32 day's, then end users only have to run
a script on x86 to extrace the important bits, no kernel module
building.. (you can see my hacks in the sgx-blob directory..)

Regards,

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

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Re: [beagleboard] QT5.1.1 running on BeagleBoneBlack

[Robert Nelson]

> Hi Robert,
>
> I see that sgx_build_modules.sh isn¹t working. I¹ll work on fixing the
> problem?

Other then building the modules, I'm not sure anything else is correct yet. ;)

Regards,

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

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Re: [beagleboard] QT5.1.1 running on BeagleBoneBlack

[John Syne]

On 12/18/13, 5:45 PM, "Robert Nelson"  wrote:

>>>
>>>That's awesome news, btw can you please attach your config, i kinda
>>>went hack-happy since .4 with the base config.  Plus yours works! ;)
>> Hi Robert,
>>
>> BTW, how difficult would it be to get SGX working on your V3.8 kernel?
>>I¹m
>> using Xenomai and currently there is no Xenomai patch for V3.12.
>
>We will find out tomorrow.. ;)
>
>The main thing was to get it working on a mainline 3.12 first, as "ti
>claims it works" so next comes the 3.8 madness... So we will see
>tomorrow/friday...
Hi Robert,

I see that sgx_build_modules.sh isn¹t working. I¹ll work on fixing the
problem?

Regards,
John
>
>Regards,
>
>-- 
>Robert Nelson
>http://www.rcn-ee.com/
>
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Re: [beagleboard] Single Cape Connectors / wrong part numbers in SRM?

[Gerald Coley]

OK. I will add it to the list of things to do and see if I agree.

Gerald



On Fri, Dec 20, 2013 at 12:24 PM, Ralf Roesch wrote:

> I checked the data sheet against your cape connector table found in BBB
> System Reference Manual A6.
>
> Table 19. Single Cape Connectors
> SUPPLIER  PARTNUMBER   TAIL LENGTH(in) OVERHANG(in)
> Major League  TSHC-123-D-03-145-G-LF   .145.004
> Major League  TSHC-123-D-03-240-G-LF   .240.099
> Major League  TSHC-123-D-03-255-G-LF   .255.114
>
> I think you should replace
> - ...03-240... by ...06-240...
> - ...03-255... by ...08-255...
> - TAIL by POST
>
> so we get:
>
> SUPPLIER  PARTNUMBER   POST LENGTH(in) OVERHANG(in)
> Major League  TSHC-123-D-03-145-G-LF   .145.004
> Major League  TSHC-123-D-06-240-G-LF   .240.099
> Major League  TSHC-123-D-08-255-G-LF   .255.114
>
> regards
> Ralf
>
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[beagleboard] Single Cape Connectors / wrong part numbers in SRM?

[Ralf Roesch]

I checked the data sheet against your cape connector table found in BBB System 
Reference Manual A6. 

Table 19. Single Cape Connectors 
SUPPLIER  PARTNUMBER   TAIL LENGTH(in) OVERHANG(in)
Major League  TSHC-123-D-03-145-G-LF   .145.004
Major League  TSHC-123-D-03-240-G-LF   .240.099
Major League  TSHC-123-D-03-255-G-LF   .255.114

I think you should replace
- ...03-240... by ...06-240...
- ...03-255... by ...08-255...
- TAIL by POST

so we get:

SUPPLIER  PARTNUMBER   POST LENGTH(in) OVERHANG(in)
Major League  TSHC-123-D-03-145-G-LF   .145.004
Major League  TSHC-123-D-06-240-G-LF   .240.099
Major League  TSHC-123-D-08-255-G-LF   .255.114

regards
Ralf

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Re: [beagleboard] Some BBB Books for $5 through Jan 3rd

[Jason Kridner]

Thanks for the heads up!

On Fri, Dec 20, 2013 at 10:32 AM, Philip Polstra  wrote:
> All the Packt ebooks are $5 for a while including a couple BBB books, one
> from someone on this list.
>
> http://www.packtpub.com/search?keys=beaglebone&sort=0&types=0&forthcoming=1&available=1&count=20
>
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[beagleboard] RS485 cape and UART on BeagleBone

[telcred]

Short problem description: 
I'm trying to get my RS485 cape to work on a BeagleBone running Debian. I 
can't receive any response from the slave device though sending works OK.

Longer description:
I am accessing my BB using SSH over Ethernet (not ttyO0). My BB is booting 
from microSD with Debian (3.8.13-bone30 from armhf.com).

I have loaded BB-BONE-UART4 to the cape manager - all OK. I configure the 
/dev/ttyO4 for 115200 / 8n1 using stty (confirmed correct settings for my 
slave device), and I can send traffic by echo'ing to /dev/ttyO4. At the 
other end of the RS485 line the slave device receives the command OK (I can 
toggle its LED).

But the BeagleBone only shows the local echo of the sent traffic, *never 
any response from the slave*. After the local echo I only see a 
never-ending stream of junk characters repeating. To view the response, I 
use the following script in a separate terminal: 

stty -F /dev/${device} raw
stty -F /dev/${device} 115200 
cat /dev/${device} |hexdump -C

I have also tried with
stty -F /dev/${device} 115200 cs8 -cstopb -parenb -brkint -icrnl -imaxbel 
-opost
tail -c +1 -f /dev/ttyO4 | hexdump -C

but it makes no difference to the output.

I have tested the slave with a PC and RS485-to-USB cable, and it works 
perfectly at 115200 / 8n1.

I have tested the cape on a BeagleBoneBlack (disabling HDMI and eMMC 
virtual capes) and I get the same problem.

I have even seen the same symptoms when testing the slave + a completely 
different cape (which also has an on-board RS-485 controller and its own 
overlay, which is loaded OK).

I have tested using different power supplies for slave and BB (joint and 
separate supply).

I tested using a clean install of Debian.

I have tested with other UARTs (ttyO2, ttyO5) - same result.

Things I have NOT yet done:
1) tested with Angstrom Linux (standard with BB and BBB)
2) terminated the RS-485 line endpoints with resistors (the line is 15-30 
cm ... should not be necessary).
3) tested at lower baud rate

Basically I am out of feasible ideas ... 

Can anyone suggest anything else I can investigate or check?

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Re: [beagleboard] Cranky BBB

[rattus]

Sadly, I don't have the appropriate cable.

I've tried telnet, ssh, and Cloud9 console via both USB or Ethernet, no go. 
I get the startup Web page and Cloud9 just fine. This is one of the latest 
batch (like last week?): BeagleBone Black rev 00A6 S/N 4713BBBK2106

Is perhaps my only option to burn an SD card, but then again, would that 
image be any different than that which is loaded into the EMMC? BTW, I'm on 
either a Mac or Linux host.

There's got to be a way in!

On Friday, December 20, 2013 9:07:03 AM UTC-7, Gerald wrote:
>
> Can you go in through the serial debug port?
>
> Gerald
>
>

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Re: [beagleboard] Re: BeagleBone Black doesn't sometimes start. Only Power LED is on

[Gerald Coley]

Get one of the latest version and try it. There was a change made back on
Rev A6 that tied the 3V3B power up to the 3V3A. The 3V3B rail was coming up
before the 3V3A rail. That may help this issue.

Gerald


On Fri, Dec 20, 2013 at 10:32 AM, Gerald Coley wrote:

> Could be. That issue we have not seen. The one we did see was addressed by
> the capacitor change. I will look at this for a later revision, assuming we
> can duplicate it. But it won't be in the next revision for sure.
>
> Gerald
>
>
>
> On Fri, Dec 20, 2013 at 10:26 AM,  wrote:
>
>> Thanks Gerald.
>>
>> You changed C24 to a 2.2uF capacitor to improve the reset signal but we
>> don't think that fix the issue.
>> We made some measurements around UART0 and we are convinced that u-boot
>> detects spurious data during start up. Find below 2 ocilloscope screenshots
>> (CH1 :  PIN 3-J1   B_UART0_TX, CH2 :  PIN 4-J1 B_UART0_RX).
>> http://hpics.li/9d7742f
>> http://hpics.li/956957a
>> RX signal looks noisy when TX signal changes. Maybe a coupling issue?
>>
>> Regards,
>>
>> Ludovic
>>
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>
>

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Re: [beagleboard] Re: BeagleBone Black doesn't sometimes start. Only Power LED is on

[Gerald Coley]

Could be. That issue we have not seen. The one we did see was addressed by
the capacitor change. I will look at this for a later revision, assuming we
can duplicate it. But it won't be in the next revision for sure.

Gerald



On Fri, Dec 20, 2013 at 10:26 AM,  wrote:

> Thanks Gerald.
>
> You changed C24 to a 2.2uF capacitor to improve the reset signal but we
> don't think that fix the issue.
> We made some measurements around UART0 and we are convinced that u-boot
> detects spurious data during start up. Find below 2 ocilloscope screenshots
> (CH1 :  PIN 3-J1   B_UART0_TX, CH2 :  PIN 4-J1 B_UART0_RX).
> http://hpics.li/9d7742f
> http://hpics.li/956957a
> RX signal looks noisy when TX signal changes. Maybe a coupling issue?
>
> Regards,
>
> Ludovic
>
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Re: [beagleboard] Re: BeagleBone Black doesn't sometimes start. Only Power LED is on

[llindor . acticonseils]

Thanks Gerald.

You changed C24 to a 2.2uF capacitor to improve the reset signal but we don't 
think that fix the issue.
We made some measurements around UART0 and we are convinced that u-boot detects 
spurious data during start up. Find below 2 ocilloscope screenshots (CH1 :  PIN 
3-J1   B_UART0_TX, CH2 :  PIN 4-J1 B_UART0_RX).
http://hpics.li/9d7742f
http://hpics.li/956957a
RX signal looks noisy when TX signal changes. Maybe a coupling issue?

Regards,

Ludovic

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[beagleboard] SD card boot and SD/MMC file system driver.

[lagrecjo]

I am using IAR EWARM development environment and the Segger embOS Operating 
System on the BeagleBone board. 

I have no problem compiling and running applications on the board's IRAM 
and DDR RAM via the JTAG.

I now need to have the board start my application from the SD card and 
additionally use the SD card for file storage via a mountable file system 
in my application.

1) Are there any clear procedures and tools for boot loading a non-linux 
application from the SD card?
2) Are there any drivers available for the MMC interface to allow mounting 
a file system from the SD card in an application?

All suggestions appreciated. 

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Re: [beagleboard] Cranky BBB

[Gerald Coley]

Can you go in through the serial debug port?

Gerald



On Fri, Dec 20, 2013 at 9:50 AM, rattus  wrote:

> Therein lies the rub. In order to delete the
> /etc/dropbear/dropbear_rsa_host_key file, I first need to log in. Going in
> through the Cloud9 console, I can only access things in the cloud9 tree.
> Cannot telnet or ssh in to the BBB via either USB or Ethernet interfaces.
> How do I get in?
>
> On Friday, December 20, 2013 5:56:14 AM UTC-7, Gerald wrote:
>>
>> http://www.elinux.org/Beagleboard:BeagleBone_Black_
>> FAQ#Cloud9.2C_GateOne_SSH.2C_Bonescript.2C_.26_C.2FC.2B.2B
>>
>> Gerald
>>
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Re: [beagleboard] Dual Display Capes

[Gerald Coley]

Looking at this I see no way to hook one board into two different displays.
There is one connector for the board on each panel. The board only has one
set of connectors.

Why do you need two displays that have the same information displayed on
both of them?

Gerald



On Fri, Dec 20, 2013 at 9:35 AM, Yash Shah  wrote:

> 4DCAPE-70T:
> http://www.4dsystems.com.au/product/22/138/Beagle_Bone_LCD_Capes/4DCAPE_70/
> DATASHEET:
> http://www.4dsystems.com.au/productpages/4DCAPE-70T/downloads/4DCAPE-70T_datasheet_R_1_1.pdf
>
> 4DCAPE-43T:
> http://www.4dsystems.com.au/product/22/125/Beagle_Bone_LCD_Capes/4DCAPE_43/
> DATASHEET:
> http://www.4dsystems.com.au/new/productpages/4DCAPE-43/downloads/4DCAPE-43(T)_datasheet_R_1_8.pdf
>
> These are the specific components I intend on using.
>
> Regards.
>
>
> On Friday, 20 December 2013 20:59:56 UTC+5:30, Gerald wrote:
>
>> In general, as long as both displays are the same resolutions, timing,
>> and size you can do that. There is only one LCD interface on the processor.
>>
>> As to the capes, they have no top side connectors, because putting
>> anything into top side connectors would cover up the display. Display capes
>> are designed to be the last cape on the stack so they can be visible.
>>
>> Gerald
>>
>>
>> On Fri, Dec 20, 2013 at 9:24 AM, Yash Shah  wrote:
>>
>>> I plan on using Dual Display capes for my Project. The only query that I
>>> have is that since the 4DCAPE-70T LCD cape has provisions for additional
>>> capes using the additional headers, can another cape, say 4DCAPE-43T LCD,
>>> be connected to my BBB?
>>> #Newbie
>>>
>>> --
>>> For more options, visit http://beagleboard.org/discuss
>>> ---
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>>>
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>>>
>>
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Re: [beagleboard] Cranky BBB

[rattus]

Therein lies the rub. In order to delete the 
/etc/dropbear/dropbear_rsa_host_key file, I first need to log in. Going in 
through the Cloud9 console, I can only access things in the cloud9 tree. 
Cannot telnet or ssh in to the BBB via either USB or Ethernet interfaces. 
How do I get in?

On Friday, December 20, 2013 5:56:14 AM UTC-7, Gerald wrote:
>
>
> http://www.elinux.org/Beagleboard:BeagleBone_Black_FAQ#Cloud9.2C_GateOne_SSH.2C_Bonescript.2C_.26_C.2FC.2B.2B
>
> Gerald
>

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Re: [beagleboard] Dual Display Capes

[Yash Shah]

4DCAPE-70T: 
http://www.4dsystems.com.au/product/22/138/Beagle_Bone_LCD_Capes/4DCAPE_70/
DATASHEET: 
http://www.4dsystems.com.au/productpages/4DCAPE-70T/downloads/4DCAPE-70T_datasheet_R_1_1.pdf

4DCAPE-43T: 
http://www.4dsystems.com.au/product/22/125/Beagle_Bone_LCD_Capes/4DCAPE_43/
DATASHEET: 
http://www.4dsystems.com.au/new/productpages/4DCAPE-43/downloads/4DCAPE-43(T)_datasheet_R_1_8.pdf

These are the specific components I intend on using.

Regards.

On Friday, 20 December 2013 20:59:56 UTC+5:30, Gerald wrote:
>
> In general, as long as both displays are the same resolutions, timing, and 
> size you can do that. There is only one LCD interface on the processor.
>
> As to the capes, they have no top side connectors, because putting 
> anything into top side connectors would cover up the display. Display capes 
> are designed to be the last cape on the stack so they can be visible.
>
> Gerald
>
>
> On Fri, Dec 20, 2013 at 9:24 AM, Yash Shah 
> > wrote:
>
>> I plan on using Dual Display capes for my Project. The only query that I 
>> have is that since the 4DCAPE-70T LCD cape has provisions for additional 
>> capes using the additional headers, can another cape, say 4DCAPE-43T LCD, 
>> be connected to my BBB?
>> #Newbie
>>
>> -- 
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>> --- 
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>>
>
>

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[beagleboard] Some BBB Books for $5 through Jan 3rd

[Philip Polstra]

All the Packt ebooks are $5 for a while including a couple BBB books, one
from someone on this list.

http://www.packtpub.com/search?keys=beaglebone&sort=0&types=0&forthcoming=1&available=1&count=20

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Re: [beagleboard] Dual Display Capes

[Gerald Coley]

In general, as long as both displays are the same resolutions, timing, and
size you can do that. There is only one LCD interface on the processor.

As to the capes, they have no top side connectors, because putting anything
into top side connectors would cover up the display. Display capes are
designed to be the last cape on the stack so they can be visible.

Gerald


On Fri, Dec 20, 2013 at 9:24 AM, Yash Shah  wrote:

> I plan on using Dual Display capes for my Project. The only query that I
> have is that since the 4DCAPE-70T LCD cape has provisions for additional
> capes using the additional headers, can another cape, say 4DCAPE-43T LCD,
> be connected to my BBB?
> #Newbie
>
> --
> For more options, visit http://beagleboard.org/discuss
> ---
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[beagleboard] Dual Display Capes

[Yash Shah]

I plan on using Dual Display capes for my Project. The only query that I 
have is that since the 4DCAPE-70T LCD cape has provisions for additional 
capes using the additional headers, can another cape, say 4DCAPE-43T LCD, 
be connected to my BBB?
#Newbie

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[beagleboard] Re: Software selection for Beaglebone black

[pariyanshah]

I will describe my queries i missed out - 

1. How do i choose which platform to work on? I intend to use OpenCV for 
real time image processing. I have never used anything other than Windows 
platform. So guide me accordingly.

2. I have gone through several tutorials, projects on the internet. What I 
see is the BBB is connected via ethernet/USB to a computer.(I am not 
talking about the power supply, an adapter will work too). In some projects 
there is BBB working as the only processing device, no computer is 
connected. I want the same for my project. Is there any tutorial describing 
a way how to go about making a project independent of computer? Or I am 
lacking some basic knowledge on this issue?

3. I find tutorials on based specifically on Beagleboard, Beagleboard xM or 
Beaglebone. What are general changes/precautions I should take before 
implementing for Beaglebone Black? Or should I stick to only those 
tutorials that have information solely for BBB?


Thankyou in advance

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Re: [beagleboard] CPU freq

[Robert Nelson]

On Fri, Dec 20, 2013 at 9:00 AM, Bogdan Teodorescu
 wrote:
> +5 V barrel by a lab power supply 5V/5Amps
> the current is 500 mA and the modem works perfect in Angstrom

Well they share the "same" patchset (minus 1-2 distro related
patches).. So you have the Angstrom .config (1) and mine (2)

1: https://github.com/beagleboard/kernel/blob/3.8/configs/beaglebone
2: https://github.com/RobertCNelson/linux-dev/blob/am33x-v3.8/patches/defconfig

Care to bisect/debug?

Regards,


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

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RE: [beagleboard] CPU freq

[Bogdan Teodorescu]

+5 V barrel by a lab power supply 5V/5Amps
the current is 500 mA and the modem works perfect in Angstrom

-Original Message-
From: beagleboard@googlegroups.com [mailto:beagleboard@googlegroups.com] On 
Behalf Of Robert Nelson
Sent: Friday, December 20, 2013 5:01 PM
To: Beagle Board
Subject: Re: [beagleboard] CPU freq

On Fri, Dec 20, 2013 at 8:42 AM, Bogdan Teodorescu 
 wrote:
> I just wanted to better document the problems.
> Some of them:
> If I put USB modem Huawei 3772 direct into  the USB connector it 
> flashes and then the power is cut off

Is the device powered by USB or the 5volt barrel connector? (what rating)

> If I put a USB hub between the same, but if I put another device into 
> the hub everything is OK and I manage to work with the modem

If that fixes it, then your USB modem is crap, taking way too much current on 
startup..

Regards,


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

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Re: [beagleboard] CPU freq

[Robert Nelson]

On Fri, Dec 20, 2013 at 8:42 AM, Bogdan Teodorescu
 wrote:
> I just wanted to better document the problems.
> Some of them:
> If I put USB modem Huawei 3772 direct into  the USB connector it flashes and 
> then the power is cut off

Is the device powered by USB or the 5volt barrel connector? (what rating)

> If I put a USB hub between the same, but if I put another device into the hub 
> everything is OK and I manage to work with the modem

If that fixes it, then your USB modem is crap, taking way too much
current on startup..

Regards,


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

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RE: [beagleboard] CPU freq

[Bogdan Teodorescu]

I just wanted to better document the problems.
Some of them:
If I put USB modem Huawei 3772 direct into  the USB connector it flashes and 
then the power is cut off
If I put a USB hub between the same, but if I put another device into the hub 
everything is OK and I manage to work with the modem

I will put a list and screen captures wit dmesg later



-Original Message-
From: beagleboard@googlegroups.com [mailto:beagleboard@googlegroups.com] On 
Behalf Of Robert Nelson
Sent: Friday, December 20, 2013 3:46 PM
To: Beagle Board
Subject: Re: [beagleboard] CPU freq

On Fri, Dec 20, 2013 at 5:43 AM, Bogdan Teodorescu 
 wrote:
> I know
>
> But I want to be done automatically at start-up.

/etc/default/cpufrequtils
https://wiki.debian.org/HowTo/CpuFrequencyScaling

> Because of poor power management I also have some USB problems
>
> I will post later.

Uh, so why don't you post the details now?

>
> Now I look at differences between Angstrom and Ubuntu.
>
> Angstrom does a far better job with power management and USB devices 
> but does not have some devices files for USB G3 modem and RS 232/USB 
> adapters I must use.

Regards,

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

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Re: [beagleboard] Re: Java on BBB

[Mike Bremford]

That's a Java ME class, and I expect you're running Java SE aren't you?
There's no reason that I'm aware of to run the micro-edition on hardware
like the BBB, it's easily got enough grunt to run the full JVM.

I'm accessing GPIO, I2C, SPI from J2SE using JNA (
https://github.com/twall/jna) which is working very well - it's a wrapper
around libc, much easier to work with than JNI, and because it's just libc
wrapped in Java you can do anything you can do in C - in particular, you
can poll() on filehandles, which means you can use the GPIOs through the
/sys/class/gpio interface.

To preempt the next question, I've extracted a bit of code and put it as a
shar archive at http://pastebin.com/af3CRU5r. Download the raw content to a
shell script and run it, it will give you 5 Java source files. Compile them
with the "jna.jar" file from ther JNA project mentioned above. This is an
extract from a project I'm working on so in order to use it you'd need to
fill in a couple of blanks, namely the events that are being fired when the
GPIO changes value: search for "pubGPIO" to see where that happens. I'm
also using the GPIO overlays from https://github.com/nomel/beaglebone to
set pull-ups/pulldowns, although this isn't essential to the classes. The
I2C stuff is there for good measure but is also independent. And if you
want to do things completely differently, the POSIX.java file is my way
into libc via JNA, and doesn't depend on anything else.


On 20 December 2013 10:17,  wrote:

> I'm really puzzled. I've no problem gettig java to run on the beaglebone
> black, but I can't find an implementation for com.oracle.deviceaccess.* I
> would like to reference a GPIOPin.class from my java code and manupulate it
> directly. Anybody any clues? I'm pulling my hair out here...
>
> On Thursday, May 9, 2013 8:57:53 PM UTC+2, Andy St John wrote:
>>
>> This deploys openJDK 6 on beaglebone black.
>>
>> I could not get this to install successfully on the shipping image.
>> I flashed my board with *BBB-eMMC-flasher-2013.05.08 *then tried
>> installing all of the following packages as recommended in another post on
>> this forum, but encountered several issues.
>>
>> openjdk-6-common
>>
>> openjdk-6-demo
>>
>> openjdk-6-doc
>>
>> openjdk-6-java
>>
>> openjdk-6-jdk
>>
>> openjdk-6-jre
>>
>> openjdk-6-source
>>
>> openjdk-6-vm-cacao
>>
>> openjdk-6-vm-jamvm
>>
>> openjdk-6-vm-zero
>> These are the packages I installed in the order I installed them.
>> openjdk-6-common
>> openjdk-6-java
>> openjdk-6-jre
>> openjdk-6-jdk
>> openjdk-6-vm-jamvm
>>
>> The vm-zero package would not install due to a dependency issue (libffi5
>> >= 3.0.10)
>> and vm-cacao installed without errors but a VM would not start
>>
>>  --
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Re: [beagleboard] CPU freq

[Robert Nelson]

On Fri, Dec 20, 2013 at 5:43 AM, Bogdan Teodorescu
 wrote:
> I know
>
> But I want to be done automatically at start-up.

/etc/default/cpufrequtils
https://wiki.debian.org/HowTo/CpuFrequencyScaling

> Because of poor power management I also have some USB problems
>
> I will post later.

Uh, so why don't you post the details now?

>
> Now I look at differences between Angstrom and Ubuntu.
>
> Angstrom does a far better job with power management and USB devices but
> does not have some devices files for USB G3 modem and RS 232/USB adapters I
> must use.

Regards,

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

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Re: [beagleboard] BBB does not recognise USB connected Arduino2009 if this is self powered

[MV]

Hi!

It is a noise from a socket type power adaptor.
What really matter is that BBB does not more recognise USB, even if reboot. 

I tryied many USB-RS232 adapters (without external powering USB slaves).
The connection is unstable.
dmesg show ftdi related problems (unable to change speed or other iocntl).

BBB is powered with only 1A adaptor.
I'll try a better one.

Il giorno giovedì 12 dicembre 2013 20:44:39 UTC+1, Gerald ha scritto:
>
> I have not heard that noise before.
>
> Gerald
>
>
>
> On Thu, Dec 12, 2013 at 12:33 PM, MV >wrote:
>
>> Problems arise anyway after random time with ftdi USB-RS232 adapters. 
>>
>> If I connect a self powered HUB or self powered Arduino I can ear 
>> something become noisy: "zzz...".
>>
>> Is this a known problem ?
>>
>> Thanks
>>
>>  
>>  
>>
>> -- 
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>>
>
>

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Re: [beagleboard] Re: BeagleBone Black doesn't sometimes start. Only Power LED is on

[Gerald Coley]

It is called Rev A6A.

http://www.elinux.org/Beagleboard:BeagleBoneBlack#Board_Revisions_and_Changes


Gerald



On Fri, Dec 20, 2013 at 6:58 AM,  wrote:

> Hi Gerald,
> We encountered exactly the same issue described above with several
> BeagleBone revision A5C.
> Do you plan to fix it in the next hardware board revision? Or must we
> systematically update the bootloader with the patch from Andrew Glen?
> Many thanks
> Regards,
>
> Ludovic
>
> --
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Re: [beagleboard] Re: BeagleBone Black doesn't sometimes start. Only Power LED is on

[llindor . acticonseils]

Hi Gerald,
We encountered exactly the same issue described above with several BeagleBone 
revision A5C.
Do you plan to fix it in the next hardware board revision? Or must we 
systematically update the bootloader with the patch from Andrew Glen?
Many thanks
Regards,

Ludovic

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Re: [beagleboard] Cranky BBB

[Gerald Coley]

http://www.elinux.org/Beagleboard:BeagleBone_Black_FAQ#Cloud9.2C_GateOne_SSH.2C_Bonescript.2C_.26_C.2FC.2B.2B

Gerald


On Thu, Dec 19, 2013 at 10:53 PM, William Hermans  wrote:

> If you search the forums / groups here concerning this same issue you'll
> find the fix. Basically from what I remember is has to do with a 0 byte
> dropbear key file or some such . . . but I do not use Angstrom so I could
> not advise personally.
>
>
> On Thu, Dec 19, 2013 at 5:11 PM, Michael Gehl  wrote:
>
>> Hi - I just received a few of the latest BBBs. Great! Power it up,
>> connect it to my router, check the assigned IP address, check it’s presence
>> in the Web browser - all the BB intro stuff is there.
>>
>> Then, pop over to a terminal, ssh root@, and I get: 
>> ssh_exchange_identification:
>> read: Connection reset by peer  Wow - that’s unfriendly. My old
>> Beaglebone White welcomed me with open arms.
>>
>> Any ideas as to what changed, and how to get in?
>>
>> --
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[beagleboard] Re: BeagleBone Black doesn't sometimes start. Only Power LED is on

[moonsurveyor]

Hi i had the same problem.

My solution is to plug the barrel connector first and then plug the adaptor 
into the wall socket.
The it boots always.




On Wednesday, July 31, 2013 11:48:54 PM UTC+2, duckhunt...@gmail.com wrote:
>
> Hi guys,
>
> we have a problem with our Beagle Bone Black (A5C). We are using Ubuntu 
> Raring 13.04 armhf v3.8.13-bone21 (2013-06-14) on the eMMC (no SD Card). 
> The Beagle Bone is placed in a case and we have connected it to a DC power 
> supply. Sometimes (I would say every 5 to 10 times), when we are plugging 
> in our power supply, the BeagleBone powers on (Power LED is on), but 
> nothing more happens (none of the other four LEDs is on). If we are now 
> removing the power supply and putting it in again, the BBB starts normally. 
> I guess the power supply is strong enough: 5A@5V.
>
> Thanks for your help in advance.
>
> Regards,
> duckhunter
>

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[beagleboard] Re: Java on BBB

[gijsbert . sijpesteijn]

I'm really puzzled. I've no problem gettig java to run on the beaglebone 
black, but I can't find an implementation for com.oracle.deviceaccess.* I 
would like to reference a GPIOPin.class from my java code and manupulate it 
directly. Anybody any clues? I'm pulling my hair out here...

On Thursday, May 9, 2013 8:57:53 PM UTC+2, Andy St John wrote:
>
> This deploys openJDK 6 on beaglebone black.
>
> I could not get this to install successfully on the shipping image.
> I flashed my board with *BBB-eMMC-flasher-2013.05.08 *then tried 
> installing all of the following packages as recommended in another post on 
> this forum, but encountered several issues.
>
> openjdk-6-common
>
> openjdk-6-demo
>
> openjdk-6-doc
>
> openjdk-6-java
>
> openjdk-6-jdk
>
> openjdk-6-jre
>
> openjdk-6-source
>
> openjdk-6-vm-cacao
>
> openjdk-6-vm-jamvm
>
> openjdk-6-vm-zero
> These are the packages I installed in the order I installed them.
> openjdk-6-common
> openjdk-6-java
> openjdk-6-jre
> openjdk-6-jdk
> openjdk-6-vm-jamvm
>
> The vm-zero package would not install due to a dependency issue (libffi5 
> >= 3.0.10)
> and vm-cacao installed without errors but a VM would not start
>
>

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[beagleboard] Software selection for Beaglebone black

[pariyanshah]

guys how do i choose which platform to work on?

Ångström Linux
Android
Ubuntu
Cloud9 IDE 

I knw C/C++, JAVA langbut i m ready to learn another if needed

I want to build real time OCR project using BBB as processing device.

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RE: [beagleboard] CPU freq

[Bogdan Teodorescu]

I know
But I want to be done automatically at start-up.
Because of poor power management I also have some USB problems
I will post later.
Now I look at differences between Angstrom and Ubuntu.
Angstrom does a far better job with power management and USB devices but does 
not have some devices files for USB G3 modem and RS 232/USB adapters I must use.

From: beagleboard@googlegroups.com [mailto:beagleboard@googlegroups.com] On 
Behalf Of Maxim Podbereznyy
Sent: Friday, December 20, 2013 1:43 PM
To: beagleboard
Subject: Re: [beagleboard] CPU freq


Change the cpu governor to "performance" and you will see  difference
20 дек. 2013 г. 13:41 пользователь 
mailto:bogdan.teodore...@quartzmatrix.ro>> 
написал:
I noticed that the board is slow and the CPU freq is 30  - Beaglebone Black 
A5B

Linux arm 3.8.13-bone32 #1 SMP Fri Dec 13 20:05:25 UTC 2013 armv7l armv7l 
armv7l GNU/Linux
root@arm:~# cat /sys/devices/system/cpu/cpu0/cpufreq/cpuinfo_cur_freq
30

I know that powering from USB the board will slow down to 30 MHz but the 
board is powered from +5 V with a 5Amps power supply

I even boot only from power supply and attach the usb cable after boot sequence 
(monitoring LED)
Any idea how to switch to high freq ? I also have problems with the USB host - 
I presume that it is also related to wrong detection of primary power supply
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Re: [beagleboard] CPU freq

[Maxim Podbereznyy]

Change the cpu governor to "performance" and you will see  difference
20 дек. 2013 г. 13:41 пользователь 
написал:

> I noticed that the board is slow and the CPU freq is 30  - Beaglebone
> Black A5B
>
> Linux arm 3.8.13-bone32 #1 SMP Fri Dec 13 20:05:25 UTC 2013 armv7l armv7l
> armv7l GNU/Linux
> root@arm:~# cat /sys/devices/system/cpu/cpu0/cpufreq/cpuinfo_cur_freq
> 30
>
> I know that powering from USB the board will slow down to 30 MHz but
> the board is powered from +5 V with a 5Amps power supply
>
> I even boot only from power supply and attach the usb cable after boot
> sequence (monitoring LED)
> Any idea how to switch to high freq ? I also have problems with the USB
> host - I presume that it is also related to wrong detection of primary
> power supply
>
>  --
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[beagleboard] Re: BBB fried?

[Giulio]

And for your information: yes, i own a raspberry pi, and yes, i use gpio on 
it and no, didn't burn any.


Il giorno mercoledì 18 dicembre 2013 01:38:42 UTC+1, BeagleInterest ha 
scritto:
>
> When users fry a $45 beaglebone black shouldn't they just accept 
> responsibility and buy a new one?  I'm all for making people happy but at 
> $45 it must be near cost and I'd hate to see bbb discontinued or price 
> raised because of continued user error causing burned out boards. 
>  Something like the Raspberry Pi is touted as a laptop replacement and 
> people don't plug gpio into it.  RMA should be for manufacturing defects 
> and not user error...
>

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[beagleboard] Re: BBB fried?

[Giulio]

Calm down, I simply asked what happened with my board and if I could do 
something. I didn't asked for something free: if it's my fault it's fair 
that i'll pay for it. Haven't you ever made mistakes? And in that case, 
have you asked yourself if you could repair it?

Il giorno mercoledì 18 dicembre 2013 01:38:42 UTC+1, BeagleInterest ha 
scritto:
>
> When users fry a $45 beaglebone black shouldn't they just accept 
> responsibility and buy a new one?  I'm all for making people happy but at 
> $45 it must be near cost and I'd hate to see bbb discontinued or price 
> raised because of continued user error causing burned out boards. 
>  Something like the Raspberry Pi is touted as a laptop replacement and 
> people don't plug gpio into it.  RMA should be for manufacturing defects 
> and not user error...
>
> On Tuesday, December 17, 2013 5:22:52 AM UTC-8, Giulio wrote:
>>
>> Hi, I had my beaglebone black wired with a relay board, using a 
>> transistor to separate different voltage sources and to provide more 
>> current. A wifi usb adapter was connected to the Bone too. Everything was 
>> running smoothly but, when i unplugged the adaptor e plugged it again, the 
>> system stopped working. It wasn't the first time i rebooted that way buy 
>> until then everything was ok... now it won't boot, only the pwr led blink 
>> for a second when I apply some voltage source. I tried to press the power 
>> button during the boot, ma nothing happen. Is my board fried?
>>
>

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[beagleboard] CPU freq

[bogdan . teodorescu]

I noticed that the board is slow and the CPU freq is 30  - Beaglebone 
Black A5B

Linux arm 3.8.13-bone32 #1 SMP Fri Dec 13 20:05:25 UTC 2013 armv7l armv7l 
armv7l GNU/Linux
root@arm:~# cat /sys/devices/system/cpu/cpu0/cpufreq/cpuinfo_cur_freq
30

I know that powering from USB the board will slow down to 30 MHz but 
the board is powered from +5 V with a 5Amps power supply

I even boot only from power supply and attach the usb cable after boot 
sequence (monitoring LED)
Any idea how to switch to high freq ? I also have problems with the USB 
host - I presume that it is also related to wrong detection of primary 
power supply

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