Subject:
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Re: kernel hacking in lnp.c (problem)
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Newsgroups:
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lugnet.robotics.rcx.legos
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Date:
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Thu, 1 Mar 2001 19:08:41 GMT
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Viewed:
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1427 times
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Kenneth Johansen <kennethj@stud.cs.uit.no> writes:
> in /kernel/lnp.c
> there is a function called lnp_receive_packet.
> here im trying to insert a function that will display whatever came in
> the data field when lnp_receive_packet was called.
> (interested in seeing everything, including headers,etc)
> i have made it so that it will only display the data when i press the
> view button.
>
> anyways it compiles fine and i get it to download to the RCX, but when i
> try to download another "user" program to the rcx
> i always get "error deleting program"
>
> so.heh...i guess im missing something pretty obvous here, but i cant
> seem to figgure it out.
Posting your code would help a lot :-). lnp_receive_packet() is called
after the integrity layer has verified the checksum from an interrupt
handler. So your code should be short e never call functions that wait or
may cause a task switch. dll uses LNP to download programs, and when it
doesn't get reply from RCX it complaines with the "error deteleting
program".
Probably your code doesn't allow data to pass to higher levels of LNP
(that's what my crystal ball says, sometimes it's right :-).
bye
Bernardo
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Message has 1 Reply:
 | | Re: kernel hacking in lnp.c (problem)
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| (...) The best way to do this kind of thing is to save the info you want to display in a variable or something, set a flag saying somethings there, and let another task display the data & reset the flag. You can see a simple implementation of this (...) (24 years ago, 1-Mar-01, to lugnet.robotics.rcx.legos)
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Message is in Reply To:
| | kernel hacking in lnp.c (problem)
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| hi everybody. in /kernel/lnp.c there is a function called lnp_receive_packet. here im trying to insert a function that will display whatever came in the data field when lnp_receive_packet was called. (interested in seeing everything, including (...) (24 years ago, 1-Mar-01, to lugnet.robotics.rcx.legos)
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