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access to the reset pin — Parallax Forums

access to the reset pin

ArchiverArchiver Posts: 46,084
edited 2004-02-27 15:54 in General Discussion
I've got a BS2P40 with the P40 professional demo board. Is there
anywhere on the board where I can tap into the RESET pin on the stamp
so I can reset it with an off-board switch?

Comments

  • ArchiverArchiver Posts: 46,084
    edited 2004-02-26 21:47
    There is not *easy* way to do it (no wire socket like for other IOs).

    -- Jon Williams
    -- Parallax

    Original Message
    From: andy_watson5 [noparse]/noparse]mailto:[url=http://forums.parallaxinc.com/group/basicstamps/post?postID=54GIfvA08lx0u63WqJMD255Yf2kVirm3oEoE4OPmJ63TuOdPh1oKNicyl-JHq3h58q0DRjYYw7x_y_tDcmQ]andywatson@m...[/url
    Sent: Thursday, February 26, 2004 2:52 PM
    To: basicstamps@yahoogroups.com
    Subject: [noparse][[/noparse]basicstamps] access to the reset pin


    I've got a BS2P40 with the P40 professional demo board. Is there
    anywhere on the board where I can tap into the RESET pin on the stamp
    so I can reset it with an off-board switch?
  • ArchiverArchiver Posts: 46,084
    edited 2004-02-26 21:52
    Hmmm. Okay, thanks for the info. Looks like I'll have to
    improvise. That's half the fun of designing anyway... [noparse]:)[/noparse]

    --- In basicstamps@yahoogroups.com, "Jon Williams" <jwilliams@p...>
    wrote:
    > There is not *easy* way to do it (no wire socket like for other
    IOs).
    >
    > -- Jon Williams
    > -- Parallax
    >
    >
    >
    Original Message
    > From: andy_watson5 [noparse][[/noparse]mailto:andywatson@m...]
    > Sent: Thursday, February 26, 2004 2:52 PM
    > To: basicstamps@yahoogroups.com
    > Subject: [noparse][[/noparse]basicstamps] access to the reset pin
    >
    >
    > I've got a BS2P40 with the P40 professional demo board. Is there
    > anywhere on the board where I can tap into the RESET pin on the
    stamp
    > so I can reset it with an off-board switch?
  • ArchiverArchiver Posts: 46,084
    edited 2004-02-26 22:36
    The ATN line on the DB9S serial connector hooks to the processor
    reset pin via an inverting transistor. You can thus do a reset by
    bringing DTR high on a PC, or do the same thing an external switch.
    There might be some interaction if both a PC and a switch are active
    at the same time. Some of the Parallax development boards have
    capacitors between DB9 pin 4 and the Reset transistor, but I don't
    know if that is true of the BS2p pro demo board. One way or the
    other, it just changes the circuit picture a little.

    By the way, notice that on the Debug screen, there is a check box to
    set the state of the DTR line. You can use that during your
    development to cause a reset.

    -- Tracy




    -- Tracy



    >Hmmm. Okay, thanks for the info. Looks like I'll have to
    >improvise. That's half the fun of designing anyway... [noparse]:)[/noparse]
    >
    >--- In basicstamps@yahoogroups.com, "Jon Williams" <jwilliams@p...>
    >wrote:
    >> There is not *easy* way to do it (no wire socket like for other
    >IOs).
    >>
    >> -- Jon Williams
    >> -- Parallax
    >>
    >>
    >>
    Original Message
    >> From: andy_watson5 [noparse][[/noparse]mailto:andywatson@m...]
    >> Sent: Thursday, February 26, 2004 2:52 PM
    >> To: basicstamps@yahoogroups.com
    >> Subject: [noparse][[/noparse]basicstamps] access to the reset pin
    >>
    >>
    >> I've got a BS2P40 with the P40 professional demo board. Is there
    >> anywhere on the board where I can tap into the RESET pin on the
    >stamp
    > > so I can reset it with an off-board switch?
  • ArchiverArchiver Posts: 46,084
    edited 2004-02-27 10:25
    Besides what Tracy mentionned, I think there is a reset button on the
    demo board, isn't it? You could tap the reset line from the contacts
    of the reset switch.
    Regards
    Adrian
  • ArchiverArchiver Posts: 46,084
    edited 2004-02-27 15:54
    Yeah, that's what I've done. It just doesn't look as neat and clean,
    but it works fine.

    --- In basicstamps@yahoogroups.com, "Adrian Schneider"
    <adrian.schneider@t...> wrote:
    > Besides what Tracy mentionned, I think there is a reset button on
    the
    > demo board, isn't it? You could tap the reset line from the
    contacts
    > of the reset switch.
    > Regards
    > Adrian
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