From mboxrd@z Thu Jan 1 00:00:00 1970 Date: Fri, 26 Oct 2012 14:36:34 +0200 From: Nicholas Mc Guire Message-ID: <20121026123634.GA28381@opentech.at> References: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: Subject: Re: [Xenomai] Seeking recommendations for SBC with precision timer List-Id: Discussions about the Xenomai project List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , To: Howard Lee Harkness Cc: xenomai@xenomai.org On Fri, 26 Oct 2012, Howard Lee Harkness wrote: > I have a client requirement for a system that can handle hard real time > with precision timing, and I'm looking for recommendations for a SBC to > support it. Here's what is needed: > > 1) x86 architecture fanless ? > 2) support for Linux (I will probably be using Xenomai) > 3) precision timer with 1 us resolution many systems will be able to give you a timer reolution of <=1us but there is no system that will bee able to timstamp an event with that precission - that is any timestamp you get will have an uncertenty atleast in the range of a few microseconds to a few tens of microseconds (thats independent of using Xenomai, Preept-RT or RTAI) > 4) PC/104 bus > 5) lots of I/O (USB 2, I2C, SPI, GPIB, etc) > > Anybody here have any experience with a board that has all this? it does to some extent depend on the "etc" of the "lots of I/O" unless you are good with it all being stacked on the PC/104. you might want to look at the boards in the http:/www.OSADL.org/QA, unfortunately not xenomai based systems in the farm but the jitter/latency numbers will most likely hold for Xenomai based systems with negligable offsets. thx! hofrat