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<== Date ==> <== Thread ==>

Subject: Re: Epics on ARM linux
From: Michael Abbott <[email protected]>
To: [email protected]
Cc: EPICS tech-talk <[email protected]>
Date: Mon, 19 Jul 2010 13:33:43 +0100 (BST)
On Fri, 16 Jul 2010, [email protected] wrote:
> I am currently using epics/linux on x86 intel processors. Is there any 
> reason why epics/linux wouldn't be supported on arm processors? (linux 
> is but any issue to be expected with epics?)
> 
> Is anyone embedding their IOCs in their controlled hardware?

The Libera Electron Beam Position monitors, which we use at Diamond, uses 
an embedded ARM PXA255 processor.  The EPICS driver can be found at
	http://controls.diamond.ac.uk/downloads/libera/

The main issue to pay attention to is that floating point support on the 
ARM is very weak.  It is useful, if possible, to use the more recent EABI 
calling convention to avoid the cost of emulating floating point.  More 
importantly, take care to avoid using floating point in large waveform or 
other high rate calculations.

Other than that the ARM is a very nice device to program, with a truly 
exceptional assembler model.

References:
Epics on ARM linux emmanuel_mayssat

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