Joe Grand of Grand Idea Studios gave a presentation at OSBridge the other week, video is now online:
Open Source Tools of the Hardware Hacking Trade
Joe Grand
Many embedded systems contain design flaws that could lead to exploitable vulnerabilities. In order to discover such flaws, hackers and engineers use a specific set of tools. In this session, Joe will discuss his favorite open source hardware hacking and reverse engineering tools, including those that monitor/decode digital communications, extract firmware, inject/spoof data, and identify/connect to debug interfaces.
More Info:
http://confreaks.tv/videos/osbridge2015-open-source-tools-of-the-hardware-hacking-trade
http://opensourcebridge.org/events/2015/schedule
http://www.grandideastudio.com/
Firmware Security 