Comments for Exploring BeagleBone

Comment on Chapter 7: Cross Compilation, Eclipse, and Building Linux by ricky

ricky — Sat, 23 Jan 2021 15:38:42 +0000

Hi Derek, Thanks for a great tutorial, I have learned a lot. I have one problem that i can’t figure out. When i make a new connection in Remote systems, I am able to select ‘Linux’, setup my host name, then select, ssh.files, processes.shell.linux, and ssh.shells, but then the ‘Next’ button is inactive and i can only select ‘Finish’, which means i cannot add the terminal. I am running Debian stretch, and installed the Remote Systems from ‘Latest Eclipse Release’. I am able to connect to the BBB with the shell, but I don’t have the terminal, and the terminal would be much better. Any idea what went wrong? thanks!

Comment on Chapter 7: Cross Compilation, Eclipse, and Building Linux by Charles J Dickerson

Charles J Dickerson — Fri, 15 Jan 2021 01:09:37 +0000

Hi Derek: I went ahead and installed Debian buster on my desktop (previously Ubuntu), and was able to get everything running through chapter 7, I left the BBB at wheezy and it worked fine. Your book and video have been extremely helpful, thanks!

Comment on Chapter 3: Exploring Embedded Linux Systems by Jacob

Jacob — Tue, 05 Jan 2021 04:38:58 +0000

Page 88. I think you meant to say rename instead of reboot when using hostname commands.

Comment on Chapter 7: Cross Compilation, Eclipse, and Building Linux by Chuck Dickerson

Chuck Dickerson — Tue, 29 Dec 2020 14:30:31 +0000

Hi Derek, I bought your book a few years ago and now I have time to dive into it. I installed Eclipse on my Ubuntu desktop but due to some crosstool issues I am having I am thinking about switching it to Debian. Is https://www.debian.org/releases/buster//installmanual a good place to start? It’s not Jessie but I’m hoping buster will work as well. I’m not well versed in linux so it would be easier for me to install the latest. Would I also want to update the BBB to buster?
Thanks!

Comment on Chapter 7: Cross Compilation, Eclipse, and Building Linux by abolfazl

abolfazl — Fri, 25 Dec 2020 10:33:30 +0000

Hi Derek, I have a big project and I am using Clion IDE for development, the problem is with the remote connection Beaglebone Black can not create and build large files!

Any help and small clues can be helpful!
Thankful

Comment on Chapter 2: The Beagle Board Software by Prashant

Prashant — Tue, 22 Dec 2020 04:53:12 +0000

Hi Derek,

The link to the SRM seems to be broken. Can you please re-check it ?
Thanks

Comment on Chapter 2: The Beagle Board Software by Randy Cooper

Randy Cooper — Fri, 04 Dec 2020 18:56:06 +0000

Derek, I’m trying to use the Cloud9 debugger for a Python3 program that I am writing, but am having issues with getting the debugger to do anything. I’ve set breakpoints, and it never halts. I am struggling to see what I am doing wrong. I’m using an older, 2 GB Beagleboard black, but have installed the latest image on a 16 GB SD card, and disabled booting to the internal EMMC. I saw one comment mentioning that “You will get a message “debugger listening on port XXXXX”. Then press the “Resume” button on the top right” The buttons on the top right remain grayed out, and nothing seems to turn bring them active…. HELP!!!!!

Comment on Chapter 9: Interacting with the Physical Environment by Jose Galan

Jose Galan — Wed, 11 Nov 2020 14:16:31 +0000

Thank you so much for the book and the site. Your dedication to teach others, your methodology and detail is wonderful. As a hobby I’m learning BB, I’m old, use to developed in C in the (87-96) , after that i went to administration in databases and i have been doing that since. In the steeper motor class and application , I’m getting “No such file or Directory” i started debugging the issue, to me is related to new versions of the kernel or library. Others are also reporting the same issue. I did the debug manually, I will get more detail as soon i finish the eclipse setup. Any recommendation?

exploringBB::write (path=”/sys/class/gpio/cd /”, filename=”value”, value=”0″) at /home/debian/C++/exploringBB/library/gpio/util.cpp:43
43 if (!fs.is_open()){
(gdb) s
44 perror(“GPIO: write failed to open file “);
(gdb) s
__GI_perror (s=0xb6fc28f4 “GPIO: write failed to open file “) at perror.c:49
49 perror.c: No such file or directory.
(gdb) s
58 in perror.c
(gdb) s
__GI___fileno (fp=0xb6e02d10 ) at fileno.c:35
35 fileno.c: No such file or directory.
(gdb) s
dup () at ../sysdeps/unix/syscall-template.S:78
78 ../sysdeps/unix/syscall-template.S: No such file or directory.
(gdb) s
79 in ../sysdeps/unix/syscall-template.S
(gdb) s
_IO_new_fdopen (fd=fd@entry=3, mode=0xb6de4094 “w+”) at iofdopen.c:53
53 iofdopen.c: No such file or directory.
(gdb) s
68 in iofdopen.c
(gdb) s
70 in iofdopen.c
(gdb) s
75 in iofdopen.c
(gdb) s
76 in iofdopen.c
(gdb)
88 in iofdopen.c
(gdb)
__GI___libc_fcntl (fd=fd@entry=3, cmd=3) at ../sysdeps/unix/sysv/linux/fcntl.c:42
42 ../sysdeps/unix/sysv/linux/fcntl.c: No such file or directory.

Comment on Chapter 3: Exploring Embedded Linux Systems by Dave

Dave — Tue, 10 Nov 2020 11:01:56 +0000

p128:” echo “Just some text” > newfile.txt ” generates permission denied error. I tried ‘sudo’ before the command without luck.

‘sudo nano newfile.txt’ in /test does the trick

Super book. It’s challenging for me being relatively new to programming but very enjoyable

Comment on Chapter 6: Interfacing to the Beagle Board Inputs/Outputs by Brian Walker

Brian Walker — Mon, 12 Oct 2020 16:28:29 +0000

Derek, I purchased your second book, “Exploring BeagleBone” a couple of months ago. I am working in Chapter 6 under the heading, “The Linix Device Tree”. I am specifically working the example under the subheading “Modifying a Board Device Tree”.

Device: BeagleBone Black Rev. C
Linux Version: Linux ebb 4.14.108-ti-r137 #lstretch SMP PREEMPT Tue Aug 25 01:48:39 UTC 2020 armv71 GNU/Linux

I followed the example line by line and it would not flash the “heartbeat” on LED5 on the beaglebone board.
I repeated this example 5 times total and was unable to get it to work. ANY HELP WOULD BE GREATLY APPRECIATED.