Re: Serial port methods

Hi!

Am Di, den 30.03.2004 schrieb Mauro Farracha : Tyrex um 13:01:
> Does anyone knows why when i use enableReceiveTimeout(2000), it doesnt
> wait 2 seconds to read bytes!!! its instantaneous (after - before = 0) it
> reads about ~100 characters.
> But when i use enableReceiveTimeout(2000) and
> enableReceiveThreshold(1024) the time elapse is 20ms and reads about 250
> characters... why it doesn't wait 2 seconds or better reads 1024 bytes!!!

First off, I'm no expert in TINI's Java, but normally, what I know from
programming on PC and other uCs, the receiveTimeout is the maximum time
for the _first_ byte to become available before a read function will
return with 0 bytes.
And the Threshold is a _maximum_ threshold. So, if there are say 250
bytes in the buffer, you do a read() you will get those 250 bytes that
are available. If you don't read this buffer will hold a maximum of 1024
bytes, after that bytes will be dropped. That's what the threshold is
for...

If I'm totally wrong here, feel free to correct me ;)

Cheers,
Manuel

-- 
[email protected]
http://www.matronix.de - http://www.elektronik-kompendium.de/public/borchers

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