Experimental Physics and
Industrial Control System

Mark Rivers via Tech-talk <tech-talk at aps.anl.gov> · Mon, 22 Jun 2020 11:54:41 +0000

Hi Marcel,

I am not an expert in VXI-11.  I don't know if the SRQ functionality in VXI-11 using the old devGpib device support has ever been tested.  It looks like you are getting the 5 second timeout on recognizing the SRQ response defined here:

devGpib/devSupportGpib.c:#define DEFAULT_SRQ_WAIT_TIMEOUT 5.0

I don't know what the expected sequence of events is to recognize the SRQ, which as you said appears to have happened OK.

I am including tech-talk in this reply in case someone else can help.

Mark

________________________________
From: marcel.wurm at ptb.de <marcel.wurm at ptb.de>
Sent: Monday, June 22, 2020 5:11 AM
To: Mark Rivers
Subject: SRQ over VXI

Hello Mark,

i`m trying to use a written and working GPIB driver for a Keysight 2985 over a VXI-11 connection instead.
But i`m struggling a little bit with the SRQ-signal.

The VXI-11 connection and communication works good with these lines in the "st.cmd"-file: (i added the mask lines for some debug information)
vxi11Configure("L0", keyem01.ahf.ptb.de, 0, 2.0, "inst0", 0)
asynSetTraceMask("L0", 0, 0xff)
asynSetTraceIOMask("L0", 0, 0xff)

I set the i3address for the used driver to "00".
The functions work and i get correct values for some reading operations.
But the functions which were implemented with GPIBREADW and waiting for SRQ don`t work.

Reading Operation with a function without SRQ:

2020/06/22 11:24:16.610 A2980:keyem0100sourceGetVolt queueReadRequest
2020/06/22 11:24:16.610 L0 addr -1 queueRequest priority 2 not lockHolder
2020/06/22 11:24:16.610 L0 schedule queueRequest timeout
2020/06/22 11:24:16.610 asynManager::portThread port=L0 callback
2020/06/22 11:24:16.610 A2980:keyem0100sourceGetVolt queueCallback
2020/06/22 11:24:16.610 A2980:keyem0100sourceGetVolt prepareToRead
2020/06/22 11:24:16.611 L0 -1 vxiWrite numchars 11
2020/06/22 11:24:16.613 L0 -1 vxiWrite
:SOUR:VOLT?
:SOUR:VOLT?

3a 53 4f 55 52 3a 56 4f 4c 54 3f
2020/06/22 11:24:16.613 A2980:keyem0100sourceGetVolt writeIt
:SOUR:VOLT?
:SOUR:VOLT?

3a 53 4f 55 52 3a 56 4f 4c 54 3f
2020/06/22 11:24:16.618 L0SRQ SRQ
2020/06/22 11:24:16.618 L0 asynGpib:srqHappened
2020/06/22 11:24:16.618 L0 addr -1 queueRequest priority 1 not lockHolder
2020/06/22 11:24:16.620 L0 -1 vxiRead
+0.00000000E+000

+0.00000000E+000\n

2b 30 2e 30 30 30 30 30 30 30 30 45 2b 30 30 30 0a
2020/06/22 11:24:16.620 A2980:keyem0100sourceGetVolt gpibRead nchars 17
2020/06/22 11:24:16.620 A2980:keyem0100sourceGetVolt gpibRead
+0.00000000E+000

+0.00000000E+000\n

2b 30 2e 30 30 30 30 30 30 30 30 45 2b 30 30 30 0a
2020/06/22 11:24:16.621 asynManager::portThread port=L0 callback
2020/06/22 11:24:16.621 L0 asynGpib:srqPoll serialPollBegin
2020/06/22 11:24:16.623 L0 asynGpib:srqPoll serialPoll addr 0 statusByte 04
2020/06/22 11:24:16.623 L0 asynGpib:srqPoll serialPollEnd

Reading Operation with a function which waits for SRQ:

2020/06/22 11:24:56.827 A2980:keyem0100rawData queueReadRequest
2020/06/22 11:24:56.827 L0 addr -1 queueRequest priority 2 not lockHolder
2020/06/22 11:24:56.827 L0 schedule queueRequest timeout
2020/06/22 11:24:56.828 asynManager::portThread port=L0 callback
2020/06/22 11:24:56.828 A2980:keyem0100rawData queueCallback
2020/06/22 11:24:56.828 A2980:keyem0100rawData prepareToRead
2020/06/22 11:24:56.828 L0 -1 vxiWrite numchars 6
2020/06/22 11:24:56.830 L0 -1 vxiWrite
:READ?
:READ?

3a 52 45 41 44 3f
2020/06/22 11:24:56.830 A2980:keyem0100rawData writeIt
:READ?
:READ?

3a 52 45 41 44 3f
2020/06/22 11:24:57.045 L0SRQ SRQ
2020/06/22 11:24:57.045 L0 asynGpib:srqHappened
2020/06/22 11:24:57.045 L0 addr -1 queueRequest priority 1 not lockHolder
2020/06/22 11:25:01.826 A2980:keyem0100rawData waitTimeout
2020/06/22 11:25:01.826 L0 addr -1 queueRequest priority 2 from lockHolder
2020/06/22 11:25:01.826 L0 schedule queueRequest timeout
2020/06/22 11:25:01.826 asynManager::portThread port=L0 callback
2020/06/22 11:25:01.826 A2980:keyem0100rawData queueCallback
2020/06/22 11:25:01.826 A2980:keyem0100rawData readAfterWait
2020/06/22 11:25:01.826 asynManager::portThread port=L0 callback
2020/06/22 11:25:01.826 L0 asynGpib:srqPoll serialPollBegin
2020/06/22 11:25:01.828 L0 asynGpib:srqPoll serialPoll addr 0 statusByte 54
2020/06/22 11:25:01.828 L0 asynGpib:srqPoll serialPollEnd

But the message:
2020/06/22 11:24:57.045 L0 asynGpib:srqHappened
shows that there was a recognized SRQ over the vxi connection.
But it seems that the values were not read after the SRQ.

Thanks and
Best regards
Marcel Wurm

Physikalisch-Technische Bundesanstalt
7.25 Informationstechnik Berlin-Adlershof
Albert-Einstein-Straße 15
12489 Berlin

Tel.: +49 30 3481 7166
E-Mail: marcel.wurm at ptb.de

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System