Experimental Physics and
Industrial Control System

Mark Rivers <[email protected]> · Mon, 3 Jun 2013 21:33:35 +0000

Hi Emmanuel,

I am doing basically what you are doing in my SNL programs, and it is working fine.  Here is an example with some unrelated lines removed.

***************************************************************************
/* Maximum number of detectors supported */
#define MAX_SIGNALS 32

int i;
int n;
int numSignals;
char temp[100];

char *prefix;
char *record;
char *field;

int   ReadArray[MAX_SIGNALS];
assign  ReadArray to
          {"","","","","","","","","","","","","","","","",
           "","","","","","","","","","","","","","","",""};
int     ReadArrays; assign ReadArrays to "{P}DoReadAll";
monitor ReadArrays; evflag ReadArraysMon; sync ReadArrays ReadArraysMon;

int     SNL_Connected;  assign SNL_Connected      to "{P}SNL_Connected";

int Acquiring; assign Acquiring to "{P}Acquiring";

ss mca_control {
  state init {
    when() {
      prefix = macValueGet("P");
      record = macValueGet("R");
      field = macValueGet("FIELD");
      numSignals = atoi(macValueGet("NUM_SIGNALS"));
      if ((numSignals <= 0) || (numSignals > MAX_SIGNALS)) {
        printf ("NUM_SIGNALS is illegal.\n");
        numSignals = 0;
      }
      for (i=0; i<numSignals; i++) {
        n = i+1;
        sprintf(temp, "%s%s%d.%s", prefix, record, n, field);
        pvAssign(ReadArray[i], temp);
       }
    } state waitConnected
  }

  state waitConnected {
    when (pvAssignCount () == pvConnectCount ()) {
      printf ("SIS: All channels connected.\n");
      SNL_Connected = 1;
      pvPut(SNL_Connected);
    } state monitor_changes
  }
***************************************************************************

Cheers,
Mark

________________________________
From: [email protected] [[email protected]] on behalf of Emmanuel Mayssat [[email protected]]
Sent: Monday, June 03, 2013 2:38 PM
To: Al Honey; [email protected]
Subject: RE: SEQ with dynamic assignment of PV in array variable

My solution compiled, didn't segment fault, but also does not work !!!

Thank you Al for your suggestion.
I assume you are passing tel, sys, and d0/1/2/3 as parameters to your seq program.
In my case, I would like to use a static array (~parameters are hard-coded in program)
as I have 'too' many of them (~ 50 parameters)

Now I expect around 20 arrays, each with 50 assign statements
That's why I am looking at a for loop with pvAssign
So far pvAssign doesn't work on my side..

Anyone else?

________________________________
From: [email protected]
To: [email protected]
Subject: RE: SEQ with dynamic assignment of PV in array variable
Date: Mon, 3 Jun 2013 18:30:03 +0000

Hi Emmanuel

We do the following at Keck:

float openLoop[4];

assign openLoop[0] to "{tel}{sys}{d0}openLoop";

assign openLoop[1] to "{tel}{sys}{d1}openLoop";

assign openLoop[2] to "{tel}{sys}{d2}openLoop";

assign openLoop[3] to "{tel}{sys}{d3}openLoop";

monitor openLoop;

Al

From: [email protected] [mailto:[email protected]] On Behalf Of Emmanuel Mayssat
Sent: Monday, June 03, 2013 7:29 AM
To: [email protected]
Subject: SEQ with dynamic assignment of PV in array variable

Hello,

I am working on a seq program.

For that program, I am interacting with magnet power supplies.

The interfaces to the power supplies are all the same (about 10 PV each).

For each interface PV, I would like do to something like this...

#define NB_OF_SUPPLIES  50

short enable[NB_OF_SUPPLIES];

assign enable[0] to "I:S001:PS:EnableBO";

assign enable[1] to "I:SO10:PS:EnableBO";

...

monitor enable;

but programmatically.

I looked at the docs and they are somewhat confusing.

Q: Is there a place to put the pvAssign statement?

Q: Should the array's cell be initialized/assigned to ""  during declaration?

Q: Can I monitor a not-yet configured PV array?

Q: How can I find out about the connection to each of the PVs?

etc.

If anyone has an example of using pvAssign on array variables (i.e. enable),  I would appreciate it.

Regards,

--

Emmanuel

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System