1. Chiel January 16, 2015 at 3:34 pm

    Dear Sir

    May I ask which versions (numbers) of Debian and Eclipse you have used for the book?

    (While performing the steps under chapter 7 to install the toolchain and eclipse, I’m getting errors (pretty much everywhere) and like to try (for the third time from scratch) in a virtual box with the same (presumably elder) versions that where used for the book.
    However I can’t find these version numbers in the book or on this website. I don’t have the skills (or time) to solve the errors as I can’t find much about them on the internet.
    The logic reasoning is that applying the steps from chapter 7 blindly isn’t applicable on newer versions of Debian, JRE and Eclipse.)

    Kind Regards
    Chiel Sol
    Gent (Belgium)

    • Derek January 16, 2015 at 4:28 pm

      Hi Chiel Sol, I’m just using a recent version of 64-bit Debian and Eclipse Luna:

      Have you followed the steps in the video on the web page for Chapter 7 ( I only made this last week using the steps in the chapter and it appeared to work correctly. Please watch the steps very carefully on installing the toolchain — one misstep will send everything wrong from that point on.
      Kind regards, Derek.

  2. Brendan June 23, 2015 at 2:56 pm

    Hey Derek,
    I downloaded one the most recent images “ Debian Image 2015-03-01” which I have used to flash to the eMMC from an SD card in case I corrupt the software at all. In Chap. 3 on pg 77 there’s a paragraph about the fact that the files you see when hooked up through usb on your computer are found at /boot/uboot/ for the Beaglebone. This is not true in my case as I found these files in /media/BEAGLEBONE/ and the /boot/uboot/ directory was empty. Can you explain this? Is this problem for future tutorials I might go through?

    Thanks! Love the book by the way!

    • Derek June 24, 2015 at 1:55 pm

      Thanks for your support Brendan. I have tried to add a description at the top of each chapter pages on the changes that this official release brings. There is a note at the top of the chapter2 page on this particular issue. It’s essentially a change that allows the new image to easily update the kernel while logged in to the BeagleBone. Kind regards, Derek.

  3. Andrew Shepard February 6, 2017 at 9:41 pm

    Hi Derek,

    Enjoying your book. I’m not sure if this is the right place to post this? In Chapter 6, Location 6815. I am having a problem getting the PWM overlays to load.

    (note some of the responses are truncated as I’m using a serial terminal)

    $ sudo sh -c “echo bone_pwm_P9_22 > $SLOTS”
    [ 277.887238] pwm_test pwm_test_P9_22.15: unable to reqM

    $ sudo sh -c “echo am33xx_pwm > $SLOTS”
    [ 386.551286] bone-capemgr bone_capemgr.9: failed to load firmware ‘amx33xx_pw’

    I then cat $SLOTS and I do see both overlays are displayed in position 7 and 9

    If I change to directory /sys/devices/ocp.3/pwm_test_P9_22.15 all I see are the following entries:
    modalias power subsystem uevent

    My linux version:
    Linux beaglebone 3.8.13-bone47 #1 SMP Fri Apr 11 01:36:09 UTC 2014 armv7l GNU/Linux


    Andy …

  4. siranjeevi March 20, 2018 at 12:25 pm

    hi sir..
    i want to stand output after reboot…first set direction out(cat out direction), after reboot change direction for in…i want stand LED (OUT direction)after restart …pls reply sir..

    thanking you
    by siranjeeevi

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Exploring BeagleBone

This is the companion site for the book “Exploring BeagleBone: Tools and Techniques for Building with Embedded Linux” by Derek Molloy. The site structures and contains all of the digital media that is described in the book. Each chapter in the book links to an individual web page, which can be accessed using the menu on the top right-hand side of this page when you close this menu. For details of the book itself, click here.

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