Re: send a file to IOC

[Andrew Johnson <anj@aps.anl.gov>]

On 04/07/2015 12:22 PM, gennaro.tortone@na.infn.it wrote:
> I'm developing a run control / slow control system with EPICS
> and a feature of this system is FPGA reprogramming by XSVF file;
> 
> is it possible to define a PV (or something else) in order to
> receive a binary file sent by remote (e.g. by CSS) ?

Eric Norum developed something like that for programming flash memory
chips through CA when he was working here at the APS. The IOC it ran on
didn't have a lot of RAM, so it comes with a CA client program that
writes the data file (in this case it expects S-record format) to a
waveform record on the IOC one flash page at a time. On the IOC side the
code is an Asyn Octet driver.

You can find the code for it in the mcf5282 module here:
  http://www.aps.anl.gov/epics/modules/instrument/mcf5282/index.html
Note that there is other stuff in this module which will not be relevant
to you, but studying the files in mcf5282Sup/src with flash in their
name might give you a good starting point. Send questions here.

- 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