Aydin Tarik Zengin | 11 Aug 22:33 2014
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Removing the magnetics in Tobi ethernet port

Hello everyone,

Since the case I use won't fit, I need to remove the ethernet port on my Tobi.
I have an ethernet port ready to be used on the case and the inner side will be connected to Tobi by cable.
It's an IP67 standard ethernet connector, that's why I cannot use the stock one in my project.
I realized that Tobi's ethernet connector has magnetic filters in it but my connecter on the case does not.
I didn't think it's a big problem in the beginning but it seems it is.
Without the magnetics I couldn't make it work correctly.

So, can I use my connector w/o magnetics instead of the one on Tobi?
What's your advise?
Thanks in advance,

Tarik
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Aydın Tarık Zengin, Ph.D.

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Joran Beasley | 6 Aug 17:15 2014
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Pepper SBC screen orientation

how would one change the orientation of the screen from Landscape to Portrait?

I have checked out the github repos and built my image with
bitbake gumstix-xfce-image

Thanks,

Joran
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Farshid Tavakolizadeh | 4 Aug 10:40 2014
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Unable to Establishing a Serial Connection

Dear all,

I have recently purchased an Overo FireStorm with Pinto-TH expansion board. Unfortunately, I can't find a way to connect to it. 

On Ubuntu (host PC), dmesg shows nothing after connecting to the USB-OTG port. If I power the board with 5v, dmesg gives me the following lines:

[  636.354458] usb 1-1.2: new high-speed USB device number 9 using ehci-pci
[  636.448478] usb 1-1.2: unable to get BOS descriptor
[  636.450955] usb 1-1.2: New USB device found, idVendor=0451, idProduct=d00e
[  636.450961] usb 1-1.2: New USB device strings: Mfr=33, Product=37, SerialNumber=0
[  636.450964] usb 1-1.2: Product: OMAP3630
[  636.450967] usb 1-1.2: Manufacturer: Texas Instruments
[  639.483323] usb 1-1.2: USB disconnect, device number 9

On Windows 7/8, after connecting the power supply, Device Manager detect OMAP3630 as unknown in Other devices only for couple of seconds. Then it will be disappeared and won't be listed under LPT/COM ports neither.

On the COM, I can see the green LED is on and blue LEDs are flashing from time to time. 

Any idea what could be the issue?

Thanks a lot,
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Sriram SV | 31 Jul 16:18 2014
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Regarding custom kernel recipe

Hi all,

I am currently trying to include the "killman-pm" kernel with my yocto project for my gumstix overo board.

Currently I am unable to compile the kernel and here are the errors which I am getting currently are the following


"DEBUG: Executing shell function do_compile
NOTE: make -j 4 uImage CC=arm-poky-linux-gnueabi-gcc  -mno-thumb-interwork -marm LD=arm-poky-linux-gnueabi-ld.bfd 
  CHK     include/generated/uapi/linux/version.h
  CHK     include/generated/utsrelease.h
make[1]: `include/generated/mach-types.h' is up to date.
  CC      scripts/mod/devicetable-offsets.s
  CALL    scripts/checksyscalls.sh
  GEN     scripts/mod/devicetable-offsets.h
  HOSTCC  scripts/mod/file2alias.o
  HOSTLD  scripts/mod/modpost
  CHK     include/generated/compile.h
  CHK     kernel/config_data.h
  Kernel: arch/arm/boot/Image is ready
  Kernel: arch/arm/boot/zImage is ready
multiple (or no) load addresses:
This is incompatible with uImages
Specify LOADADDR on the commandline to build an uImage
make[1]: *** [arch/arm/boot/uImage] Error 1
make: *** [uImage] Error 2
ERROR: oe_runmake failed
WARNING: exit code 1 from a shell command.
ERROR: Function failed: do_compile (log file is located at /home/sriram/yocto/build/tmp/work/overo-poky-linux-gnueabi/linux-omap-khilman/3.5-r0/temp/log.do_compile.10641)"


I have attached my recipe file for reference.

Kindly let me know how I can add the LOADADDRESS parameter and build my custom kernel.





Attachment (linux-omap-khilman_3.5.bb): application/octet-stream, 4526 bytes
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Francesco Marletta | 31 Jul 10:00 2014

Audio problem with kernel 3.5

Hello to everyone,
I'm experiencing a strange problem with the Linux kernel 3.5.7 for the Overo COM.

When I catpure audio from the Main Mic audio channel, the level of the audio signal is very low, while the same signal is good if the capture is performed from the Aux Left channel.

Now, the problem is caused by the Kernel, since using the same Overo COM, on the same board (custom made, with the capability of switching audio to the 2 differents channels listed above) with the kernel 2.6.34 this problem don't arise (the audio level from Main Mic and Aux Left are almost the same -- I know there is a little difference in the audio path that make the two signal slightly different, but this is not a problem).

The tests has been made in the same conditions, thus the same audio file and the same capture volume levels has been used for each record.

Any idea on how to solve the problem?

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Email: francesco.marletta <at> movia.biz
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Pullan Lu | 24 Jul 22:22 2014

Windows 7 unable to install USB Serial port driver

Just received Robo Gumstick development kits.

Followed instructions to

1.      Insert SD card (system image) to the Overo COM

2.      Plugged in COM to RoboVero expansion board

3.      Connected the kit to my Windows 7 PC with supplied mini-B to A cable

4.      Power up the kit

 

Windows 7 failed installing the driver.

 

Where I can download the USB Serial port driver so I can try install it manually?

 

Thanks

 

Pullan

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rdixey | 24 Jul 04:06 2014
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Anyone Running ROS on Overo +Turtlecore?

HI,

I have an Overo FireStorm & Turtlecore, Preloaded SD with Linaro + ROS Fuerte and IRobot Create.

By following WIKI guides I've been able to SSH via WIFI to the Overo and drive the Create around using the ROS Geometry package. I was also able to add a Webcam to view where I am going while driving the Create around.

Now I want to go further and get this running like a Turtlebot using a Kinect attached to the Turtlecore USB and using ROS Turtlebot software.

I'm looking to find examples of this before I go forward, mostly for reassurance that it can be done since it appears to be no simple task.

Anyone have any success at building a fully functional Turtlebot using an Overo + Turtlecore?

If so can you direct me to a guide that lays out the process in detail?

Any response appreciated
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krutherford | 23 Jul 19:33 2014
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Detect OTG cable vs. regular USB cable

I'm using the Fire+Palo. It works as a gadget device and will show up as a
drive on a PC. However, a device such as a keyboard or a mouse can be
connected to the same usb port, through an OTG cable. My question, is how
can I programmatically detect or query which scenario is connected? 

Right now the way I know a usb device is connected it by looking at the
status of 

/sys/devices/platform/omap......./twl4030_usb/vbus

but this only tells me when something is plugged into the USB port. I need
to know what. Anyway know how to determine what's plugged in?

Thanks.

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Jeff Jenkins | 22 Jul 00:45 2014

Aerocore NuttX image compile failure

Hi,

I followed the instructions at https://github.com/aerocore/manifest, but when I performed the step make -C firmware aerocore_default, I got the following error output:

In file included from /home/mark/Desktop/Aerocore_files/px4/firmware/src/modules/mavlink/mavlink_main.cpp:76:0:
/home/mark/Desktop/Aerocore_files/px4/firmware/src/modules/mavlink/mavlink_bridge_header.h:55:32: fatal error: v1.0/mavlink_types.h: No such file or directory
compilation terminated.
make[2]: *** [mavlink_main.cpp.o] Error 1
make[1]: *** [/home/mark/Desktop/Aerocore_files/px4/firmware/Build/aerocore_default.build//home/mark/Desktop/Aerocore_files/px4/firmware/src/modules/mavlink/module.pre.o] Error 2
make: *** [/home/mark/Desktop/Aerocore_files/px4/firmware/Build/aerocore_default.build/firmware.px4] Error 2

Any ideas why this would happen (besides the obvious)?
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Bryan Poling | 17 Jul 18:16 2014
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DuOvero Bus Error Problem

Hello. We are developing a system based around the DuOvero COM and we
have been battling a frustrating and difficult bug for some time. Our
computer auto-runs our software on boot that does various things, but
mostly collects data from different sensors and imagery from two
cameras. Once in a while our program aborts with a "Bus Error". As I
understand it, on ARM this generally means that some software is
trying to load a 32 or 64-bit float from a non-aligned memory address
(other forms of non-aligned access are now caught and "fixed" by the
kernel). The problem is very rare, which makes it difficult to
identify if any changes I make have any effect or not. Also, I have
tried many times but I have never been able to re-produce this error
running in GDB.

For a long time I was operating under the assumption that this was due
to a bug in our code, but I was not able to find it. Recently I saw
the "Bus Error" happen when compiling code with GCC (none of our
software was running at the time). I have had this happen about 3
times now (in GCC). It is non-deterministic. When it happens I can
re-run the same exact command and it usually works the second time.
Also, I have run "make" from within GDB many, many times. I have never
had the "Bus Error" occur when building from within GDB.

The fact that the issue occurs in the absence of our program suggests
to me that the problem is not in our code. However, every time the Bus
Error occurs, the failure is graceful in the sense that the process
that caused it is terminated, but the computer is not crashing. This
suggests that the issue is probably happening in user space (maybe I
am wrong here... not sure). I was thinking it might be in the C/C++
standard libraries, or in the threading library, or something else
that is common and linked dynamically.

If I am right about that, it would possibly explain why the problem
does not happen in GDB. As I understand it, GDB tries to swap out
things like the threading library and the C standard library with
debug, non-optimized builds of them.

I built our distro from the Gumstix Yocto repo. I have made some
changes to it, but mostly removing unneeded software and drivers).

There is another thing worth mentioning. I am not sure if it is
related. We use C++11 threading in our software. When we first were
working on the DuOvero, creating a thread would cause an instant seg
fault (every time). We found a hack/workaround online to fix this. We
add this to our GCC invocation:
-D__GCC_HAVE_SYNC_COMPARE_AND_SWAP_1
-D__GCC_HAVE_SYNC_COMPARE_AND_SWAP_2
-D__GCC_HAVE_SYNC_COMPARE_AND_SWAP_4
-D__GCC_HAVE_SYNC_COMPARE_AND_SWAP_8

This gets rid of the segfaults from thread creation, but we don't
really know what it is doing and why it is necessary, so I thought I
would mention it.

I appreciate any help you can give us. We are out of ideas on this
one. Thank you.

Bryan

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huhydro | 16 Jul 21:51 2014
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Re: Duovero ethernet dropping connection

I also want to know if there is a fix for this problem.
My current solution is using Phillipp's suggestion which is 
/$ echo powersave > /sys/devices/system/cpu/cpu0/cpufreq/scaling_governor ,/

this can make duovero ethernet on for 3 weeks now, but the processing speed
is significantly reduced.
I wish there could be another way.

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