Subject:
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Max poke rate?
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Newsgroups:
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lugnet.robotics.handyboard
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Date:
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Mon, 11 Mar 1996 21:55:59 GMT
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Original-From:
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Franklin Ranier Roller <roller@ix.netcomSPAMLESS.com>
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Viewed:
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2063 times
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Hi,
I've been trying to write to PD2 using the following:
int write_port(int port, int value, int mask)
{
poke(port,(value & mask)|(peek(port) & ~mask));
}
It works fine except that the fastest cycle that I can get out of
PD2 is about 242 Hz. I need 1.6 kHz. In between PD2_on and PD2_off
I put a msleep(1L) or a sleep(0.001) and the sleep function is faster,
but still not a 1 mS or 1kHz. I've even tried sleep(0.0006) with same
result. Any recommendations? Do I have to hog the processor or what.
Frank
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Message has 2 Replies:
 | | Re: Max poke rate?
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| (...) I think the Interactive-C overhead will prevent such fast repetition. Simple statements take about a millisecond, with printf's taking 10 msec. You'll probably have to do it in assembler, and use an .icb file. Hope this helps... -mike * (...) (29 years ago, 11-Mar-96, to lugnet.robotics.handyboard)
| | | Re: Max poke rate?
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| (...) One option might be to try Kurt Konolige's IC compiler. I believe it only runs on a Unix machine, but you are able to compile programs for greater speed. Check out (URL) ___...___ Tom Cicatelli cica@tiac.net Melrose, Massachusetts ___...___ (29 years ago, 12-Mar-96, to lugnet.robotics.handyboard)
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