Comments on: Resources http://exploringbeaglebone.com Companion Site for the Book by Derek Molloy Mon, 10 Apr 2023 17:19:22 +0000 hourly 1 https://wordpress.org/?v=5.9.2 By: siranjeevi http://exploringbeaglebone.com/resources/#comment-2146 Tue, 20 Mar 2018 12:25:37 +0000 http://exploringbeaglebone.com/?page_id=517#comment-2146 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

]]> By: Andrew Shepard http://exploringbeaglebone.com/resources/#comment-2135 Mon, 06 Feb 2017 21:41:35 +0000 http://exploringbeaglebone.com/?page_id=517#comment-2135 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

Thanks!

Andy …

]]> By: Derek http://exploringbeaglebone.com/resources/#comment-1818 Wed, 24 Jun 2015 12:55:00 +0000 http://exploringbeaglebone.com/?page_id=517#comment-1818 In reply to Brendan.

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.

]]> By: Brendan http://exploringbeaglebone.com/resources/#comment-1810 Tue, 23 Jun 2015 13:56:51 +0000 http://exploringbeaglebone.com/?page_id=517#comment-1810 Hey Derek,
I downloaded one the most recent images “Beagleboard.org 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!
-Brendan

]]> By: Derek http://exploringbeaglebone.com/resources/#comment-475 Fri, 16 Jan 2015 16:28:15 +0000 http://exploringbeaglebone.com/?page_id=517#comment-475 In reply to Chiel.

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

molloyd@debian:~$ uname -a
Linux debian 3.2.0-4-amd64 #1 SMP Debian 3.2.65-1 x86_64 GNU/Linux

Have you followed the steps in the video on the web page for Chapter 7 (https://www.youtube.com/watch?v=hzZHcH5quow)? 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.

]]> By: Chiel http://exploringbeaglebone.com/resources/#comment-473 Fri, 16 Jan 2015 15:34:20 +0000 http://exploringbeaglebone.com/?page_id=517#comment-473 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)

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