Experimental Physics and
Industrial Control System

"Prachi Chitnis" <[email protected]> · Thu, 23 Jul 2009 12:45:57 +0530 (IST)

Hello,
My setup consists of a LeCroy scope that is interfaced to an Ubuntu 8.10 
machine on Ethernet.
I could not use Asyn to communicate with this scope, so I wrote device
support for it. My db file is as follows:

record(waveform, GetWFC1) {
  field(SCAN, "1 second")
  field(PINI, "NO")
  field(DTYP, "LeCroy WaveSurfer")
  field(INP, "#C1 S1 @C1:WAVEFORM? DAT1\n")
  field(NELM, "1000")
  field(FTVL, "CHAR")
}

record(waveform, C1a) {
  field(SCAN, "1 second")
  field(PINI, "NO")
  field(DTYP, "Soft Channel")
  field(INP, "GetWFC1 CA")
  field(NELM, "1000")
  field(FTVL, "CHAR")
}

I am using the VME_IO for input link for "LeCroy Wavesurfer" device
support. Card = (1,0) denotes (write, no write) to device, Signal = (1,0)
denotes (read, no read) from the device and the parm denotes the command
to be written to the device. The GetWFC1.VAL field is showing correct data
& is updating properly.

My problems are:

1)  When I keep C1a.INP as PP, I dont get any data into it.

2)  When I keep C1a.INP as CA (also CP), and monitor this record, I get
the data into VAL field, the timestamp updates but the data doesn't
update.

3)  When I morph C1a to subarray record, with same fields and MALM set to
1000, the the same prob as 2) occurs

4) I also set the PHAS fields of both records as 0 and 1(resp.), but that
too didn't work.

5)  When I group these two records, then nor PP neither CA input link is
able to fetch data into the VAL field of group:C1a record.

6)  I also tried to make the scan rate of C1a faster than GetWFC1, but
that didn't help.

Please suggest some solution.
Thanx in advance...

--
Prachi Chitnis
Scientific Officer 'C'
Raja Ramanna Centre for Advanced Technology, Indore
India

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System