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In lugnet.robotics.nxt.nxthacking, Matt Jadud wrote:
> Hi all,
>
> Do I need to add a JTAG port to develop an alternative runtime for the
> NXT? We did the RCX without this level of debugging, and the NXT is
> far more open. Is it necessary, nice to have, or simply not necessary
> at all?
I used a JTAG tool in the beginning by glueing a JTAG connector manually. You
could do that and perhaps have a look at section 4.3 in
http://nxtgcc.sourceforge.net/nxtgcc.pdf
However it is easier to use libnxt. I am using it in this project:
http://tinyos.cvs.sourceforge.net/*checkout*/tinyos/tinyos-2.x-contrib/nxtmote/misc/docs/html/tutorial/lesson-a.html?revision=1.1
You can download libnxt source from (or of course from the Google code site),
but then you have to correct one or two things ourself that I have corrected:
http://sourceforge.net/project/showfiles.php?group_id=174093
The NXTGCC project has some sources that compile on GCC:
http://sourceforge.net/projects/nxtgcc
It is an easy point of departure for custom firmware builds.
If you look at my post from yesterday, you can look at the simple binary
debugger using the light sensor:-) But if you did RCX stuff, I am sure this is
quite trivial for you.
>
> Given that our VM is, at its core, strictly ANSI C, we've had no
> problems running it on new hardware (eg. the H8300 in the RCX, the
> MSP430, and an ARM9 on the Surveyor SRV-1). For this reason, I'm not
> overly concerned about having hardware-level debugging. But, I thought
> I'd ask.
Good luck. Perhaps you can post a link to the project home page later...
Best,
Rasmus
>
> Cheers,
> Matt
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 | | Adding a JTAG port?
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| Hi all, Do I need to add a JTAG port to develop an alternative runtime for the NXT? We did the RCX without this level of debugging, and the NXT is far more open. Is it necessary, nice to have, or simply not necessary at all? Given that our VM is, at (...) (17 years ago, 29-Jun-07, to lugnet.robotics.nxt.nxthacking)
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