Making Wireshark Link Layer Dissectors
Wireshark is a powerful tool for analysing communications data. While it is typically used for ethernet traffic, Wireshark can be used to decode any arbitrary protocol. This article covers how to make custom link-layer dissectors using the Lua scripting language.
Flattened uImage Tree (FIT) Images
Flattened uImage Tree (FIT) images are commonly used on embedded linux systems. This article covers the steps required to examine, extract, and regenerate a FIT image.
Working with Linux Initial RAM Disks
A short reference guide to generating and modifying initrd and initramfs initial RAM disks.
Building a Busybox based OS for the DE10 Nano
Instructions for building an compact Linux root file system for the Intel DE10 Nano FPGA SoC development board using Buildroot.
Building Embedded Debian for the DE10 Nano
Instructions for building an a Debian Linux based operating system for the Intel DE10 nano FPGA SoC development board. A mainline version of both u-boot and the Linux kernel are used.
Using OpenStreetMap Offline
Setting up OpenStreetMap for use as part of an offline application can be a bit confusing. This article covers the full process.
Docker Cheatsheet
A short summary of the most common docker commands.
Git Cheatsheet
Dear future self, if you are reading this it looks like you have forgotten how to do something in Git again... Don't worry, it happens; this page has been created just for you!
Download a local copy of the CentOS 7 repositories
Instructions for downloading a local copy of the CentOS 7 repositories. This is useful when you have an isolated development network or many local clients requiring updates.
Cascaded integrator–comb (CIC) filters
CIC filters are computationally efficient implementations of narrowband lowpass filters. They are particularly suited for use as an anti-aliasing filter when decimating or an anti-image filter when interpolating. CIC filters are well suited for implementation in FPGAs and ASICs as they only require addition and subtraction operations and not multiplication.