Subject:
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Re: NXTway DS powered by LEJOS OSEK
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Newsgroups:
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lugnet.robotics
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Date:
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Fri, 10 Aug 2007 15:31:45 GMT
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Original-From:
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Juergen Stuber <juergen@jstuber.*Spamless*net>
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Viewed:
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4241 times
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Hi Takashi,
"Takashi Chikamasa" <takashic@[NOSPAM] cybernet.co.jp> writes:
>
> For LEJOS OSEK, LCD update is a critical bottle neck. I
> think this is caused by using software polling for spi
> interface. If I could use an interrupt, the performance
> should be much better. (but, haven't confirmed yet, so
> this is just a guess).
you can use interrupts and the PCD (DMA-channel),
so it should be possible to do it with a very light load
on the processor.
Jürgen
--
Jürgen Stuber <juergen@jstuber.net>
http://www.jstuber.net/
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Message is in Reply To:
 | | Re: NXTway DS powered by LEJOS OSEK
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| (...) I could measure the performance for the three cases and it was also very interesting for me. #no-so-optimized(update LCD every time) Loop count: 2695 (very slow) Size: 18240byte(includes LEJOS OSEK firmware) #optimized(LCD is updated every (...) (17 years ago, 10-Aug-07, to lugnet.robotics)
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