Re: streamDevice I/O Intr polling rate

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

Dimitrios Tsifakis wrote:
> Hello,
>
> I am producing a protocol file for a home-made scaler and I am having a
> problem. The scaler can be set up with a target count, then it can be
> given a simple "Go" command to start counting. It will send a message to
> the serial port when the required count target is reached. I am using an
> I/O Intr SCAN record to search in the serial port data for that string.
> It works for target counts that result in counting times of a second or
> more. When the real counting time is less than a second, the reported
> counting time is always more, usually around 1 second but at times a bit
> less than that. 
>
> My question is, is there a way to increase the scan rate of the I/O Intr
> record so that it detects the "target reached" string arriving on the
> serial port quicker?
>
> The counting times we expect are in the order of 300 ms. When I use
> minicom to control the scaler directly, it sends the "target reached"
> string as quickly as you would expect.
>
> I am using base-3.14.12, asyn4-15 and StreamDevice-2-4, on linux.
>
> Regards,
> Dimitris
Yes, set the variable PollPeriod (in milli seconds). It defaults to the 
value of ReplyTimeout.