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# of max VP's, includes the debug serial port?!?! — Parallax Forums

# of max VP's, includes the debug serial port?!?!

WuLabsWuLabs Posts: 7
edited 2005-04-05 17:12 in General Discussion
Hi

Does the six VP maximum include the VP's needed implictly by the debug serial port? Because I would like to turn off the debugging serial port so that I can use the full 6 for other VP's.

This is not clear in the documentation. THanks.

-Jack

Comments

  • Jon WilliamsJon Williams Posts: 6,491
    edited 2005-04-04 22:05
    Sending debug data to the Javelin programming port does not user a VP slot.

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    Jon Williams
    Applications Engineer, Parallax
    Dallas, TX· USA
  • allanlane5allanlane5 Posts: 3,815
    edited 2005-04-05 16:44
    So, Jon, you are saying that the Debug port is actually not interrupt driven at all?

    I'll take your word for it, but this seems unlikely.
  • Peter VerkaikPeter Verkaik Posts: 3,956
    edited 2005-04-05 17:12
    That is correct. That is·why the javelin outputs 0x11 when you

    call Terminal.getchar(), so the IDE terminal program knows when to

    send a byte (and you must send a byte, otherwise the javelin

    appears to be hanging. as there is no timeout)

    The debug port also does not have a 256 byte buffer.

    regards peter
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