We currently have a piece of hardware running an RTOS that needs the communication stack to be certified to DAL-B. Everything has already been developed for non commercial aerospace applications, although we now have a commercial aerospace customer who is interested in our solution.

The communications stack handles a variety of different communication methods, and we're deciding on a make vs buy decision. These communication methods include ARINC 429, RS422 and Ethernet.

Are there any products out there that are DO-178 certified and handle these communication protocols? Or will we need to go through the certification process for our own implementations?

  • $\begingroup$ I'm not sure "best way" is answerable, but given the body of your question, it seems just a matter of differently phrasing the title. $\endgroup$
    – Federico
    Nov 20, 2020 at 10:00
  • $\begingroup$ Which RTOS? Is it certified already? $\endgroup$ Nov 20, 2020 at 15:52
  • 3
    $\begingroup$ A. I don't know of any that can be purchased. Everywhere I worked, we developed our own. B. Even if you find one, you still have to integrate into your product and certify your product. Having a purchased stack would provide some certification documentation but it would not be complete for your application. C. I suggest hiring a Consultant DER. You can find one in the FAA Consultant DER Directory. Hiring an expert will save you time and money. $\endgroup$
    – Gerry
    Nov 20, 2020 at 15:57
  • 1
    $\begingroup$ As @Gerry stated, it sounds like at least talking with a Consultant DER is the place to start, as showing compliance to DO-178C is no small task. $\endgroup$ Nov 20, 2020 at 16:03
  • $\begingroup$ @selectstriker2 Real Time Operating System. $\endgroup$ Nov 26, 2020 at 21:46


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