Calling All Radio Amateurs

I recently revived a life-long hobby. I was first licensed as a Ham Radio operator in December of 1972, a few weeks after my 13th birthday. Then, as now, I loved to tinker with electronics and build stuff from scratch. I earned my Amateur Extra license at age 16, and still use that call today: K1AY. I was licensed as DA1WD during the three years that I lived near Munich, Germany as a United States Army technical specialist.

Embedded Linux Training

This is a placeholder for information related to Embedded Linux training.

I am considering developing a series of training "webinars" having general interest to embedded Linux developers. My current thinking is to start with short howto series, with examples of flash layout, MTD configuration, multi-media application usage, performance tuning, debugging, fast boot, and many other topics. These would be presentation-style, with audio and slide-ware, each maybe 45 minutes in length, covering single topics of interest.

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Thanks for visiting my site. If you have purchased a copy of my new book "Embedded Linux Primer" please send me e-mail with any comments you might have, good or bad. Thanks!

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Forums

Playing ogg files through gstreamer

From my colleage Ned Miljevic:

Here is a Gstreamer pipeline to play your favorite ogg file on Beagle board using gstreamer and alsa.

$ gst-launch filesrc location="your_ogg_file_path" ! oggdemux ! vorbisdec ! audioconvert ! alsasink

maybe audioconvert not necesaary, didn't have time to find out :)

Way cool!

How to get rythmbox to play through Jack

Source: http://ubuntuforums.org/archive/index.php/t-554457.html

This is a lot easier than trying to get it to work through PulseAudio, as I did before, and works much more reliably. Gstreamer includes a jackaudiosink plugin in the gstreamer-plugins-bad package, though it won't show up in sound properties without a little hacking.

First you need some stuff. Before that disable 'esd software mixing' in the Sounds tab of gnome-sound-properties (system->preferences->sound). Get some ladspa plugins, jack-rack, jack.plumbing, the bad plugins, patchage to see that everything works, and of course jackd (make sure you have universe/multiverse enabled):

Dual Monitor Howto

http://gentoo-wiki.com/HOWTO_Dual_Monitors

  • By challinan at 2008-10-30 15:01
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Excellent DRAM Article by Ulrich Drepper

If you are a subscriber to Linux Weekly News lwn.net you will find a great series of articles covering the details of DRAM subsystems. The series of papers, titled "What every programmer should know about memory" starts out with Part I, with more to come.

Start with part one (LWN subscription required) here

* Part 1 (What every programmer should know about memory)
* Part 2 (CPU caches)

Udev Links

Here's a few good articles on UDEV, etc.
Mastering udev
The Linux Device Model
Udev—Persistent Device Naming in Userspace

  • By challinan at 2006-12-17 11:13
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