Changing the Beaglebone CPU Frequency

Check the CPU Frequency
 The BBB has various governors that can be used to profile the performance/power usage ratio. For example, if you were to build a battery powered BBB application that required low processing requirements, you could reduce the clock frequency to conserve power. You can find out information about the current state of the BBB by typing cpufreq-info:

You can see […]

By |May 23rd, 2013|Beaglebone, Blog|18 Comments

Automatically Setting the Beaglebone Black Time Using NTP

Setting the Time on a Once-off Basis
On my current distribution the Beaglebone Black does not come with a working NTP installation in order to set the time. Because the board doesn’t have a battery backup, this means that we need a way to set the time when the board is running. If you wish to set the time you could […]

By |May 18th, 2013|Beaglebone, Blog|83 Comments

Custom Kernel and Ångström Distribution Recipe (SPI/CAN bus Support)

I have already posted on how we can build a vanilla Angstrom distribution from source at this post: Building Angstrom for Beaglebone from Source. This post looks at how we can add SPI to the kernel and rebuild the Linux kernel and Angstrom distribution. The post isn’t specific to SPI, so it may be that you are looking to make […]

By |May 5th, 2013|Beaglebone, Blog|14 Comments

Driving LED Arrays

I have started to investigate how I can drive a large bank of LEDs directly from my Beaglebone or Raspberry PI. I have developed a video before:

where I drove a 2 colour 8×8 LED common anode dot matrix display using three 74HC595s and a transistor array UDN2981A to source the current. This used the Arduino as the platform to drive […]

By |April 28th, 2013|Beaglebone, Digital Electronics, Raspberry PI|3 Comments

Building Ångström for Beaglebone from Source

The Ångström distribution is a Linux distribution for many embedded devices, the Beaglebone included. Here I am going to document the steps that I took in order to build a full distribution of Angstrom (easier to write without the unusual letters). I am working from the steps described at this site: http://www.angstrom-distribution.org/ but here I will document any difficulties and the times […]

By |April 23rd, 2013|Beaglebone, Blog|36 Comments

Beaglebone: Embedded Linux and Stepper Motors

This video examines how we can drive stepper motors using C++ within Embedded Linux using the open source hardware EasyDriver board. The video begins by describing stepper motors and the effects of micro-stepping. It then discusses the EasyDriver Board (V4.4) and all of the available inputs and outputs. The board uses the Allegro A3967 which allows for full, half-, quarter […]

By |April 16th, 2013|Beaglebone|15 Comments

Building FFMPEG for Beaglebone from Source

For my USB Logitech C920 MPEG4 webcam I decided that I would try to build ffmpeg from source and see if it improved the streaming capability of the camera. Currently, the stream is halting after about 30 seconds and the data stream becomes frozen.

So, based on the steps at this link I downloaded the x264 source and built it. I had […]

By |April 15th, 2013|Beaglebone, Blog|9 Comments