Re: StreamDevice/ASYN connection to a Telnet port

[John Dobbins <john.dobbins@cornell.edu>]

Maren,

The Gamma/Digitel SPCe has two interfaces, ethernet and RS-232. The 
problems I reported were with the ethernet interface which I have 
abandoned in favor of the RS-232 for now.
Thanks,

John


On 2/7/2011 4:39 PM, Maren Purves wrote:
> Hi Dirk,
>
> I have mine solved, I was just wondering whether John
> may need a similar solution (namely to delete the first
> N<cr>  and<lf>s - I strip out a lot more than that but
> that's because the output is longer than what channel
> access will accept).
>
> Thanks,
> Maren
>
> Dirk Zimoch wrote:
> > Hello Maren,
> >
> > StreamDevice can parse the 3 lines and put the interesting bits of
> > information into other records. It is not so easy to re-format it to one
> > long line.
> >
> > Please give an example of your input an what you want to do with it.
> >
> > Dirk
> >
> >
> > Maren Purves wrote:
> > > John/Dirk,
> > >
> > > does StreamDevice/ASYN have or allow a custom read function
> > > like drvAscii does? I have one for our dust monitor that turns
> > > 3 lines of reply (which are spaced out in time) and way too
> > > long for drvAscii into something that is one line of less than
> > > 80 characters.
> > >
> > > Wondering,
> > > Maren
> > >
> > > John Dobbins wrote:
> > > > Dirk,
> > > >
> > > > As it turns out this device really is sending one character per
> > > > network packet. The device is a new version of the Gamma/Digitel
> > > > Small Pump Controller which has an optional ethernet interface. The
> > > > ethernet interface has other problems, e.g. one can crash the
> > > > controller (turning of the pump H.V.) by overloading it with data
> > > > requests. Gamma tells me they are working on improving the ethernet
> > > > interface. For now I as using the RS-232 interface for this device
> > > > which operates without problem.
> > > >
> > > > Thanks,
> > > >
> > > > John Dobbins
> > > >
> > > >
> > > >
> > > >
> > > > On 2/2/2011 10:30 AM, Dirk Zimoch wrote:
> > > > > Hi John,
> > > > >
> > > > > StreamDevice normally reads first a single byte and then the rest in
> > > > > chunks of up to 63 bytes. The reason is that the first byte uses a
> > > > > different timeout (ReplyTimeout) than the others (ReadTimeout). The
> > > > > rest
> > > > > is fetched in 63 bytes chunks because I use an internal buffer of 64
> > > > > bytes and want to be able to add a null byte at the end to avoid
> > > > > problems with some debug output.
> > > > >
> > > > > So the first "read 1" is normal. What surprises me are the other lines.
> > > > >
> > > > > When you switch on debugging in StreamDevice (var streamDebug 1), what
> > > > > do you see?
> > > > >
> > > > > Dirk
> > > > >
> > > > > John Dobbins wrote:
> > > > > > Dear All,
> > > > > >
> > > > > > I am connecting to a Gamma Vacuum SPCe ion pump power supply. This
> > > > > > device has an ethernet port which accepts telnet connections.
> > > > > >
> > > > > > I set up StremDevice to communicate with it on port 23,
> > > > > >
> > > > > > I have  asyn Trace Masks set as follows:
> > > > > >
> > > > > > asynSetTraceMask("SPCe",-1,0x09)
> > > > > > asynSetTraceIOMask("SPCe",-1,0x2
> > > > > >
> > > > > > I have a problem in that the response string , which I expect to
> > > > > > look like  "OK 00 7.90E-13 TORR"
> > > > > >
> > > > > > appears like this:
> > > > > >
> > > > > >
> > > > > > epics>   2011/01/17 16:14:55.995 172.18.32.21:23 write 7
> > > > > > spc 0B\r
> > > > > > 2011/01/17 16:14:56.475 172.18.32.21:23 read 1
> > > > > > O
> > > > > > 2011/01/17 16:14:56.475 172.18.32.21:23 read 1
> > > > > > K
> > > > > > 2011/01/17 16:14:56.475 172.18.32.21:23 read 1
> > > > > >
> > > > > > 2011/01/17 16:14:56.475 172.18.32.21:23 read 1
> > > > > > 0
> > > > > > 2011/01/17 16:14:56.475 172.18.32.21:23 read 1
> > > > > > 0
> > > > > > 2011/01/17 16:14:56.476 172.18.32.21:23 read 1
> > > > > >
> > > > > > 2011/01/17 16:14:56.476 172.18.32.21:23 read 1
> > > > > > 7
> > > > > > 2011/01/17 16:14:56.476 172.18.32.21:23 read 1
> > > > > > .
> > > > > > 2011/01/17 16:14:56.476 172.18.32.21:23 read 1
> > > > > > 9
> > > > > > 2011/01/17 16:14:56.477 172.18.32.21:23 read 1
> > > > > > 0
> > > > > > 2011/01/17 16:14:56.477 172.18.32.21:23 read 1
> > > > > > E
> > > > > > 2011/01/17 16:14:56.477 172.18.32.21:23 read 1
> > > > > > -
> > > > > > 2011/01/17 16:14:56.477 172.18.32.21:23 read 1
> > > > > > 1
> > > > > > 2011/01/17 16:14:56.478 172.18.32.21:23 read 1
> > > > > > 3
> > > > > > 2011/01/17 16:14:56.478 172.18.32.21:23 read 1
> > > > > >
> > > > > > 2011/01/17 16:14:56.478 172.18.32.21:23 read 1
> > > > > > T
> > > > > > 2011/01/17 16:14:56.478 172.18.32.21:23 read 1
> > > > > > O
> > > > > > 2011/01/17 16:14:56.478 172.18.32.21:23 read 1
> > > > > > R
> > > > > > 2011/01/17 16:14:56.479 172.18.32.21:23 read 1
> > > > > > R
> > > > > > 2011/01/17 16:14:56.479 172.18.32.21:23 read 1
> > > > > > \r
> > > > > >
> > > > > >
> > > > > > Can someone tell me what is going on here?
> > > > > >
> > > > > > Regards and thanks,
> > > > > >
> > > > > > John Dobbins
> > > > > >
> > > > > > Cornell University
> > > > > > Lab for Elementary Particle Physics