Re: Waveform record updating problem

["Prachi Chitnis" <prachi@rrcat.gov.in>]

Hello,

By saying  "I could not use Asyn to communicate with this scope" I meant
that I could not use Asyn directly. This scope uses the VICP protocol.

I had a C driver for this scope, so it was easier to develop the device
support. Because I am a newbie to EPICS, I was avoiding Asyn to be used
with this scope, when I had a ready-to-use driver.

I am using Asyn with many other devices, and it works great.
I regret if my statement looked like as if I am doubtful about Asyn :)

Looking forward to hear from you on updating problem. Developing asyn port
driver is another good option I see.

Thanks n regards,
-- 
Prachi Chitnis
Scientific Officer C
Accelerator Control Section
RRCAT, Indore, India

> 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
>