If you do it this way, you will have to intercept *every* message generated
by the OS. That will suck up allot of CPU time. Just look for the nilEvent
message. When it is received, check the tick count or clock. If you set
the EvtGetEvent timeout to some rate that is at least twice the required
frequency, you will almost certainly get the desired timing period.
-----Original Message-----
From: Ed Deinstadt <[EMAIL PROTECTED]>
To: [EMAIL PROTECTED] <[EMAIL PROTECTED]>
Date: Wednesday, July 14, 1999 1:51 PM
Subject: Re: Automated serial output
>Not quite. You should check the time each time you get an event, regardless
>of the type of event. The timeout just guarantees that you will be invoked
>by any event at about the right time, not that it will be a nil event.
>Ed Deinstadt
>-----Original Message-----
>From: Stuart Norton <[EMAIL PROTECTED]>
>To: [EMAIL PROTECTED] <[EMAIL PROTECTED]>
>Date: Wednesday, July 14, 1999 12:37 PM
>Subject: RE: Automated serial output
>
>
>Dave,
>
>If the EvtGetEvent times out, it generates a 'nilEvent' right? Do I just
>stick another case statement right under the EvtGetEvent to handle this?
>Does it matter where?
>
>Stuart Norton
>
>
>-----Original Message-----
>From: Dave Lippincott [mailto:[EMAIL PROTECTED]]
>Sent: Wednesday, July 14, 1999 4:23 PM
>To: [EMAIL PROTECTED]
>Subject: Re: Automated serial output
>
>
>You're going to have to fudge it. Set your app to generate the nilEvent
>event with at least 2x the required frequency and check the ticks (or the
>clock) to see if it is time to perform your task. I have not found a
>reliable way to generate a periodic event at an *exact* interval (and still
>use the OS API's). You could also look into using the alarm manager, but
an
>event every 2 seconds may not be worth the overhead. Several developers
>have posted numerous help messages on this topic in the past months, you
can
>search egroups for their answers.
>
>D
>
>-----Original Message-----
>From: Stuart Norton <[EMAIL PROTECTED]>
>To: Palm Developers Forum List (E-mail) <[EMAIL PROTECTED]>
>Date: Wednesday, July 14, 1999 10:36 AM
>Subject: Automated serial output
>
>
>Hi,
>
>Just a quickie to those in the know: How do I call a function every 2
>seconds no matter what's happening in my app. I presume there's a command
to
>post regular events of a certain type onto the queue, that can then be
>handled however I want. If so, what is this?
>
>Thanks
>
>Stuart Norton
>
>
>
>
>
>
>
>
>
>
