Re: Epics-Digitizer Communication

["Ford, Christopher" <caf@slac.stanford.edu>]

At SLAC we recently evaluated the CAEN DT5730 Digitizer with an eye toward creating EPICS asyn driver support for it.

We used the DT5730's optical interface (by way of the CAEN A3818 optical controller) instead of USB.

CAEN provides C libraries for communicating with their digitizers.  In our experience, these libraries took care of the low-level protocol details.

I haven't tried the digitizer's USB connection.  Check out the CAEN A3818 if you want maximum performance from your DT5730.

Thanks,

 -Chris Ford

  SLAC

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From: tech-talk-bounces@aps.anl.gov <tech-talk-bounces@aps.anl.gov> on behalf of Eric Norum <eric@norum.ca>
Sent: Thursday, July 28, 2016 7:04 AM
To: Hulusi Öz
Cc: tech-talk
Subject: Re: Epics-Digitizer Communication

 

The error is indicating that the CAEN device is not a POSIX termios serial port and as such doesn’t accept the ioctl commands to set things like input timeout limits.  I have no idea about the CAEN device protocol.  If it happens to be USBTMC you could use the support for that this is part of ASYN.  Otherwise you’ll have to contact the CAEN folks and see what support they provide for EPICS.

On Jul 27, 2016, at 10:52 PM, Hulusi Öz <hulusi.oz1@gmail.com> wrote:

Hi Sir,

I have a few question about communication between Epics and Digitizer (manufactured by CAEN).

I tried to write a basic protocol files that just read analog input,but I don't know that it's true or not. Here it is :

Terminator = LF;

get_analog {

    in " %f";

    ExtraInput = Ignore;

}

It worked for Arduino. I can get analog values and monitor them on the terminal.

I want to use this in CAEN Digitizer,since I could deal with the Arduino,I suppose..

But,the thing is that when I connect the digitizer to the computer via USB, the IOC output says like that :

2016/07/27 09:28:55.056528 SERIALPORT SERIALPORT:input: asynError in read: Can't set "/dev/v1718_0" c_cc[VTIME]: Inappropriate ioctl for device

2016/07/27 09:28:55.056871 SERIALPORT SERIALPORT:input: I/O error after reading 0 bytes: ""

2016/07/27 09:28:55.056913 SERIALPORT SERIALPORT:input: Protocol aborted

2016/07/27 09:28:55.556477 SERIALPORT SERIALPORT:input: asynError in read: Can't set "/dev/v1718_0" c_cc[VTIME]: Inappropriate ioctl for device

I installed the CAEN driver for this product (Digitizer DT 5730 in <http://www.caen.it/csite/CaenProd.jsp?parent=14&idmod=757>) at the path "/lib/modules/4.4.0-31-generic/kernel/drivers" . When I connect it, to learn which port number that it uses , v1718_0

The way I learnt it is that :

ls /dev > notplugged // then I plug the Arduino

ls /dev > plugged

diff notplugged plugged.

Its result for the Arduino says, Serial /ttymACM0,and it works. However the result for the Digitizer says, USB /v1718_0 .

I am using Asyn Driver and StreamDevice.. I don't know that should I use another extensions or support for this product: I search on this website but I couldn't find..

Thanks in advance, sir..

Regards..

Hulusi Oz

-- 
Eric Norum
eric@norum.ca