Re: streamDevice Exception Handler Question

[Dirk Zimoch <dirk.zimoch@psi.ch>]

On 15.11.2012 15:33, Martin L. Smith wrote:
> When using steamDevice exception handlers and in particular the
> replytimeout and readtimeout handlers, what would one normally
> do in these handlers?
Probably send something to the device to reset it. Not much that would 
help EPICS. I once used it to change the baud rate because the device 
always started with a slow baud rate after power on.
> For a mismatch I simply get whatever the received data was and put
> that in a string record for display so that I know that something
> went wrong ... since the error messages are now suppressed from this
> error.
Are they? They should be suppressed for "I/O Intr" records only. I will 
check. A mismatch handler allows you to re-parse the input. But the 
other handlers don't.
> Is it possible to set a PV to a value without using an "in" command?
> Or would I simply look at the STAT field of the record using the protocol
> to know that something happened in the case of a timeout error?
Unfortunately I have no way (so far) to set PVs to some constant value. 
but perhaps....:  in "%#{=17}"; would probably set the value 17 
independently on the input, but only if there is any input.
Dirk


> Thanks,
> Marty