This is the main blog page for the website. New videos and articles will appear here as they are categorised.
Beaglebone Images, Video and OpenCV
Please note: this was an early post – the content of this post was turned into a video that is available on this page: Beaglebone: Video Capture and Image Processing on Embedded Linux using OpenCV
Getting started
Start by plugging in the camera with the power down and then booting, praying that the device is picked up. lsusb is a utility for displaying […]
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 […]
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 […]
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 […]
Remove index.php from your WordPress URL
You will notice that this site which runs using WordPress that there is no index.php in the URL when you are directly addressing a page/post or when you are linking to other pages/posts. This can achieved using the following configuration.
There are two step 1’s, depending on whether you/your web provider is using Apache or Zeus scripting. To […]
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 […]
Resize a VirtualBox guest Linux VDI Disk under Windows Host
My Linux VirtualBox guest OS often runs out of space – I never learn that to build anything in Linux, you need about 10 times the amount of space that you think you need. Also, VirtualBox recommends very small default values, so it is easy to be caught out.
Anyway, here are the current steps to re-size a VirtualBox disk, where Linux is the […]
Linux Portscan Your Network
It can often be the case that you need to scan the network to find a particular machine that has received a different IP address under a DHCP (Dynamic Host Configuration Protocol) allocation.
The easiest way to do this under Linux is to use:
Where I am scanning in the range of DHCP allocation that I have allocated on my network. My […]
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 […]