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Problem with Stamp 2 — Parallax Forums

Problem with Stamp 2

ArchiverArchiver Posts: 46,084
edited 2003-03-27 08:16 in General Discussion
hello,
i'm having a problem uploading my program to my BS2. When I press
CTRL-I to identify my stamp. I get this back: Loopback - YES
Echo - YES
but the version is not displayed. Also, when trying to upload my
program to the stamp, it displays an error message saying that it
doesn't detect a stamp. I've checked the power supply and verified
continuity in the serial cable. I can't see what's wrong. HELP! :-)

P.S. I'm using an OEM version (every thing is socketed), so if its
something in the stamp I can replace any of the chips.

Thanks,

Brian Edmonson

Comments

  • ArchiverArchiver Posts: 46,084
    edited 2003-03-26 22:15
    Brian,

    I had some of the same sort of trouble. My problem was I had miswired a
    device that was connected to the BS2. When I fixed the connections, I was
    able to communicate with the stamp.

    Good Luck,

    Art




    "Brian"

    <be068095552@y To: basicstamps@yahoogroups.com

    ahoo.com> cc:

    Subject: [noparse][[/noparse]basicstamps] Problem with
    Stamp 2
    03/26/2003

    04:06 PM

    Please respond

    to basicstamps









    hello,
    i'm having a problem uploading my program to my BS2. When I press
    CTRL-I to identify my stamp. I get this back: Loopback - YES
    Echo - YES
    but the version is not displayed. Also, when trying to upload my
    program to the stamp, it displays an error message saying that it
    doesn't detect a stamp. I've checked the power supply and verified
    continuity in the serial cable. I can't see what's wrong. HELP! :-)

    P.S. I'm using an OEM version (every thing is socketed), so if its
    something in the stamp I can replace any of the chips.

    Thanks,

    Brian Edmonson


    To UNSUBSCRIBE, just send mail to:
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  • ArchiverArchiver Posts: 46,084
    edited 2003-03-26 22:18
    thanks for your help, but i don't currently have anything connected
    to the module. I just wanted to get the program in the memmery.
    Then later connect the other electronics.

    -Brian


    --- In basicstamps@yahoogroups.com, arthur_schoenborn@a... wrote:
    >
    > Brian,
    >
    > I had some of the same sort of trouble. My problem was I had
    miswired a
    > device that was connected to the BS2. When I fixed the
    connections, I was
    > able to communicate with the stamp.
    >
    > Good Luck,
    >
    > Art
    >
    >
    >

    > "Brian"

    > <be068095552@y To:
    basicstamps@yahoogroups.com
    > ahoo.com>
    cc:

    > Subject:
    [noparse][[/noparse]basicstamps] Problem with Stamp 2
    >
    03/26/2003

    > 04:06
    PM

    > Please
    respond

    > to
    basicstamps

    >

    >

    >
    >
    >
    >
    > hello,
    > i'm having a problem uploading my program to my BS2. When I press
    > CTRL-I to identify my stamp. I get this back: Loopback - YES
    > Echo - YES
    > but the version is not displayed. Also, when trying to upload my
    > program to the stamp, it displays an error message saying that it
    > doesn't detect a stamp. I've checked the power supply and verified
    > continuity in the serial cable. I can't see what's wrong.
    HELP! :-)
    >
    > P.S. I'm using an OEM version (every thing is socketed), so if its
    > something in the stamp I can replace any of the chips.
    >
    > Thanks,
    >
    > Brian Edmonson
    >
    >
    > To UNSUBSCRIBE, just send mail to:
    > basicstamps-unsubscribe@yahoogroups.com
    > from the same email address that you subscribed. Text in the
    Subject and
    > Body of the message will be ignored.
    >
    >
    > Your use of Yahoo! Groups is subject to
    http://docs.yahoo.com/info/terms/
  • ArchiverArchiver Posts: 46,084
    edited 2003-03-26 23:45
    In helping out a previous poster with similar problems I ran across a
    few interesting results while testing my BS2P. If the line to pin 3
    of the Stamp (ATN) is open you will get a yes to loopback and echo
    but no Version or ID. Now here is the weird part. An unpowered stamp
    will also give the same result. I just double checked again and sure
    enough, my BS2P with nothing attached but the serial cable, no power,
    responds with Yes to Loopback and Echo. But no Version or ID.




    --- In basicstamps@yahoogroups.com, "Brian" <be068095552@y...> wrote:
    > hello,
    > i'm having a problem uploading my program to my BS2. When I press
    > CTRL-I to identify my stamp. I get this back: Loopback - YES
    > Echo - YES
    > but the version is not displayed. Also, when trying to upload my
    > program to the stamp, it displays an error message saying that it
    > doesn't detect a stamp. I've checked the power supply and verified
    > continuity in the serial cable. I can't see what's wrong. HELP! :-
    )
    >
    > P.S. I'm using an OEM version (every thing is socketed), so if its
    > something in the stamp I can replace any of the chips.
    >
    > Thanks,
    >
    > Brian Edmonson
  • ArchiverArchiver Posts: 46,084
    edited 2003-03-27 02:17
    Hi,
    I assume you are using the V2.5 software. I had a similar problem and thought
    it was the Stamp 2p that I had just purchased.
    The Stamp-2' all worked OK, but the 2p would not get recognized, but had
    Loopback, OK.
    The program I was trying to download was written for the Stamp-2.

    This happened on My Workbench PC (win98) and my Laptop (XP Pro).
    After thinking I had 2 bad -2p's from Parallax, I stumbled on the problem.
    The first line of code sets the type of Stamp you are talking to.

    You have to remember to set the type of stamp you are using in the Editor.
    (Select the right color stamp from the Tool Bar.)

    Good Luck and hope this is your problem.

    Alan Bradford
    Plasma Technologies


    [noparse][[/noparse]Non-text portions of this message have been removed]
  • ArchiverArchiver Posts: 46,084
    edited 2003-03-27 08:16
    Hi
    I assume your stamp is OK. Someone else mentionned the ATN (pin 3)
    already. This pin is needed to reset the stamp and to initiate
    the programming sequence. It is merely a connection to RST: a high
    on ATN pulls RST low. This raises two conditions that have to be
    asserted:

    1. ATN must be connected to serial DTR
    2. ATN requires a high pulse and must no be held in high state.

    while 2. is usually (not always) asserted by the software it is
    a good idea to use a capacitor between ATN and DTR:

    100n
    DTR
    +
    ||
    ATN
    |
    _|_100n
    ---
    |
    GND

    This cicuit also improves resistance to unwanted resets caused by
    line noise. (If you read my some of my other posts here, you find
    that I am stressing this point [noparse];)[/noparse]

    Regards
    Adrian
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