Experimental Physics and
Industrial Control System

<[email protected]> · Tue, 7 Apr 2015 19:27:32 +0000

The PSI/Diamond power supply interface does a similar thing by using waveforms to contain the binary and device driver manages the transfer of the binary to the target controller. We have a python client tool that reads the file from the file-system and crunches it into binary 'blobs' and then writes to the waveform(s) (this is necessary due to the architecture of the serial I/O handler in the target embedded software), but the principle is the same as below.
________________________________________
From: [email protected] [[email protected]] on behalf of Andrew Johnson [[email protected]]
Sent: Tuesday, April 07, 2015 7:38 PM
To: [email protected]; [email protected]
Subject: Re: send a file to IOC

On 04/07/2015 12:22 PM, [email protected] 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

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Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System