Subject:
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Re: lnp communication question
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Newsgroups:
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lugnet.robotics.rcx.legos
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Date:
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Tue, 16 May 2000 15:32:55 GMT
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Viewed:
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1443 times
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In lugnet.robotics.rcx.legos, Pavel Petrovic writes:
> Hello Tobias,
>
> > When using lnp_integrity_write(&data, length), what is the length
> > argument used for? The data can only be one byte long if I understand
> > it correctly. Can I use the length argument to send an additional byte
> > of information?
>
> Why do you think there's only 1 byte that can be sent?
> If your data buffer is longer, bytes are sent one-by-one
> serially in a packet...
So the length-argument tells lnp_integrity_write how many bytes to send?
Doesn't that mean that it would be possible to send an array consisting of many
integers, for example? How would this be done?
> Do you have some particular plans with your RCXs?
We plan to build a six-legged lego robot, which will then learn to walk using
genetic programming.
Tobias
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Message has 1 Reply:
 | | Re: lnp communication question
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| You just pass an array and give the length, to send it. In theory you can send packets with a size up to 255 bytes (look in this group, the info is in here somewhere), but sending 1 byte has a packet loss of aprox. 1% and 4 bytes aprox. 10%, over (...) (25 years ago, 17-May-00, to lugnet.robotics.rcx.legos)
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Message is in Reply To:
| | Re: lnp communication question
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| Hello Tobias, (...) Why do you think there's only 1 byte that can be sent? If your data buffer is longer, bytes are sent one-by-one serially in a packet... (...) look into lnp.c and you will see that both lnp_integrity_xxx and lnp_addressing_xxx are (...) (25 years ago, 15-May-00, to lugnet.robotics.rcx.legos)
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