Have you considered turning off the speaker at the beginning of this and turning it
back on when you are done? I know, it doesn't
discover the true problem, but it will get rid of the symptom.
I'll keep the political jokes and analogies away from this group.
Steve
"Schettino, John" wrote:
> Here is an odd behavior I cannot seem to track down...
>
> I have a app that uses the old serial manager code, "back door" methods to
> do event-based reads of the serial port:
>
> if (sirRefNum == sysInvalidRefNum) {
> err = SysLibFind ("Serial Library", &sirRefNum);
> if (err) return;
>
> err = SerOpen (sirRefNum, 0, 9600);
> if (err && (err != serErrAlreadyOpen)) {
> sirRefNum = sysInvalidRefNum;
> return;
> }
>
> // We're going to use a Wakeup Handler
> // instead of polling for input
> SerSetWakeupHandler(sirRefNum, SIRWake, 0);
> SerPrimeWakeupHandler(sirRefNum, 1);
> }
>
> Now for the weird part... When this code runs, the Palm device (several that
> I've tested including Palm IIIc/ 3.5os, pdQPhone/3.0x, VII/3.2) there is a
> soft "tick" sound (ie, SndPlaySystemSound(sndClick)) played *every time* the
> code above is executed. Commenting out the SerSet/SerPrime calls gets rid of
> the sound, but also renders the program non-functional.
>
> Where is that sound comming from, and how do I get rid of it?
>
> - John Schettino
>
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