Experimental Physics and
Industrial Control System

Andrew Johnson <[email protected]> · Fri, 6 Nov 2015 10:04:25 -0600

Hi David,

On 11/05/2015 07:00 PM, David Vine wrote:
> 
>  1. RTEMS. The RTEMS source builder seems straight forward to use but
>     I'd appreciate if someone can recommend a processor, or advice on
>     how to choose one?

If you can find a CPU board that is already supported by RTEMS you will
save yourself quite a lot of work (or money). I think we paid OAR in the
$25K-$30K range to do a port to a new VME board and that was quite a few
years ago. In case you didn't already know, Eric Norum who ported EPICS
to RTEMS now works at LBL, so you have an excellent local source of
RTEMS help just around the corner.

If you do decide to go with VME then RTEMS will make it easier to use
existing EPICS drivers than RT Linux, but be aware that many of those
drivers will have been written for Big Endian CPUs, originally for 68K
family and nowadays PowerPC, and it might take some work to convert some
of them to little-endian should you pick an Intel/x86 derivative CPU.

HTH,

- Andrew

-- 
Light thinks it travels faster than anything but it is wrong.
No matter how fast light travels, it finds the darkness has
always got there first, and is waiting for it.
    -- Terry Pratchett, Reaper Man

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System