Experimental Physics and
Industrial Control System

Mark Rivers <[email protected]> · Thu, 9 Aug 2018 00:12:41 +0000

Hi Jesse,

I was able to test it on our lab IOC remotely. I am testing in input mode 3, where pin 4 is the Inhibit input.  I don't have any signal connected to pin 4.  When I set InputPolarity=Normal it counts fine in both scaler and MCS mode.  When I change InputPolarity=Inverted it does not count in either scaler or MCS mode.  This makes be believe that the changes I made are working.  Let me know if you find otherwise.

Mark

________________________________
From: Jesse Hopkins <[email protected]>
Sent: Wednesday, August 8, 2018 12:56 PM
To: Mark Rivers
Cc: [email protected]
Subject: Re: Inverting control inputs on SIS3280?

Mark,

Thanks! That was quick. I won't have a chance to test it until the beam goes down, as we're using the SIS3820 for other experiments right now. I'll let you know how it goes.

All the best.

- Jesse

----
Jesse Hopkins, PhD
Beamline Scientist
BioCAT, Sector 18
Advanced Photon Source

On Wed, Aug 8, 2018 at 11:46 AM, Mark Rivers <[email protected]<mailto:[email protected]>> wrote:
Hi Jesse,

I just added support to the driver and .template file for a new InputPolarity record for the SIS3820.  I have also updated the medm screen, and the .req file for autosave.

I am away from the lab, so I have not tested it yet.  But you can get the master branch of mca from Github and see if it works for you.

Mark

________________________________
From: [email protected]<mailto:[email protected]> <[email protected]<mailto:[email protected]>> on behalf of Jesse Hopkins <[email protected]<mailto:[email protected]>>
Sent: Wednesday, August 8, 2018 10:46 AM
To: [email protected]<mailto:[email protected]>
Subject: Inverting control inputs on SIS3280?

Hi all,

I have an SIS3280 that I want to use the inhibit count signal for (this can be done on input 4 in mode 2, for example). Unfortunately,I want to inhibit on a TTL low signal, while my SIS3820 requires an active high inhibit. The SIS3820 does support inverting the control inputs, by setting bit 19 in the Acquisition Operation Mode. I didn't see it as a record in the documentation (http://cars9.uchicago.edu/software/epics/mcaStruck.html). Is there a way to do this from the EPICS driver? If not, is this something that you would consider adding to the driver?

(I could invert the signal externally, but it would be nice to avoid that complication)

Thanks.

- Jesse

----
Jesse Hopkins, PhD
Beamline Scientist
BioCAT, Sector 18
Advanced Photon Source

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System