Subject:
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Re: Message transmission speeds.
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Newsgroups:
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lugnet.robotics
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Date:
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Sat, 30 Dec 2000 15:57:26 GMT
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Original-From:
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Pete Sevcik <sevcik@flash.netSPAMLESS>
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Viewed:
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716 times
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In the RCX and the tower, the IR receiver is located close to the
transmitter. When the transmitter is running, the adjacent receiver's
Automatic Gain Control cirucit (AGC) becomes saturated, and sets the
receiver sensitivity to it's lowest possible value. The Mindstorms system
may understand this, and have built-in delays to allow the receiver to come
out of saturation before the response message is sent.
- pete.
Brian wrote:
> Brian wrote:
> >
> > The data rate is 2400bps, and each packet of N bytes of data has 5 + N
> > bytes of overhead. So the more realistic time to send a 1 byte message
> > is 24ms.
> Oops. Two mistakes there. (5 + 1 + 1)*4 = 28 not 24, which is moot
> because "messages" apparently have a prefix of hex F7 as part of the
> data payload, so a message is actually 9 bytes or about 36ms.
>
> Makes it sound like you're doing nothing wrong, Mr. Baker!
--
Pete Sevcik sevcik@flash.net
Techno-stuff Robotics
http://www.flash.net/~sevcik/
Robotics for FUN !
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Message is in Reply To:
 | | Re: Message transmission speeds.
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| (...) Oops. Two mistakes there. (5 + 1 + 1)*4 = 28 not 24, which is moot because "messages" apparently have a prefix of hex F7 as part of the data payload, so a message is actually 9 bytes or about 36ms. Makes it sound like you're doing nothing (...) (24 years ago, 31-Dec-00, to lugnet.robotics)
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