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From: Marco <prenom_nomus@yahoo.com>
Newsgroups: comp.lang.ada
Subject: Re: helping picking the right RTOS
Date: Sun, 17 Jun 2012 08:56:50 -0700 (PDT)
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Date: 2012-06-17T08:56:50-07:00
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On Friday, June 8, 2012 6:32:10 AM UTC-7, Patrick wrote:
> Hi Everyone
> 
> I would like to run Ada on bare metal but it doesn't look like this will be possible for me in the short term. 
> 
> There are many RTOS to choose from and it's hard to know which ones will play nice with Ada.
> 
> I have been repairing scientific instruments for 14 years now and I am just recently considering building one of my own to sell(a spectrofluorometer).  I would love to do this in Ada.
> 
> I don't think I will use a microcontroller for this but rather add my own memory and peripherals. It's not an absolute requirement but running on ARM sounds like a good place to start.
> 
> I would like the instrument to be able to participate on a LAN.
> 
> Simplicity is more import to me then power, I will need to get to know the OS well.
> 
> So all-in-all, an RTOS that brings me as close to what a bare metal environment would have been but supports networking and will support all of Ada's core language features like tasking, would be ideal.
> 
> If anyone could give me some pointers, I would really appreciate it, this will be quite a challenge for me and getting started with the right OS could make a huge difference.
> 
> Thanks for reading-Patrick

Since Ada can interface with C nicely you may want to consider using Nuttx.
It is BSD licensed.
http://nuttx.sourceforge.net/

Typically one only uses a small subset of the RTOS features so not having an existing Ada binding is not that big of a deal especially if the Ada bindings can be lightweight.