Can''t Communicate. Help.
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Thanks to the folks who wrote. It turned out that both of the
stamps in question were inoperable, damaged somehow in my
handling. I met with the staff at Rogue Robotics yesterday
afternoon for a couple hours and we determined that my
computers and software were OK, and the cable seems to have been
OK. They replaced my Stamp Stick and even lent me a spare.
Great support.
By the way, when a BS2SX is correctly identified, it is sent
a "B", echoes it, then a "e", echoed, then a "X", echoed, and
maybe some unprintable characters go one way or the other, or both,
at which point it's identified. If it goes past the X to send
a "P" and "I" something isn't right.
Anyway, thanks to those who wrote and thanks again to Rogue.
Dennis
--- In basicstamps@yahoogroups.com, "Adrian Schneider"
<adrian.schneider@t...> wrote:
> Hi
> You say you connected DTR straight to ATN, right? I do not
> recommend this as it causes you trouble if DTR is held in the
> wrong state (and holding the stamp in reset state). Use a capacitor
> between DTR and ATN, e.g.:
>
> 100nF
> DTR
||---+
ATN
> |
> _|_100nF
> ---
> |
> GND
>
> Check the level on your stamp's ATN pin, if it is high this means
that
> the stamp is hold in reset state. The forementinned circuit avoids
> this situation - and improves noise resistance besides that.
>
> One thing more: 12V nominal (17V effective) to Vin is quite a lot,
> I suggest to reduce it to something between 7V and 9V effective to
> lower the stress on the stamp's internal regulator.
>
> Regards
> Adrian
stamps in question were inoperable, damaged somehow in my
handling. I met with the staff at Rogue Robotics yesterday
afternoon for a couple hours and we determined that my
computers and software were OK, and the cable seems to have been
OK. They replaced my Stamp Stick and even lent me a spare.
Great support.
By the way, when a BS2SX is correctly identified, it is sent
a "B", echoes it, then a "e", echoed, then a "X", echoed, and
maybe some unprintable characters go one way or the other, or both,
at which point it's identified. If it goes past the X to send
a "P" and "I" something isn't right.
Anyway, thanks to those who wrote and thanks again to Rogue.
Dennis
--- In basicstamps@yahoogroups.com, "Adrian Schneider"
<adrian.schneider@t...> wrote:
> Hi
> You say you connected DTR straight to ATN, right? I do not
> recommend this as it causes you trouble if DTR is held in the
> wrong state (and holding the stamp in reset state). Use a capacitor
> between DTR and ATN, e.g.:
>
> 100nF
> DTR
||---+
ATN
> |
> _|_100nF
> ---
> |
> GND
>
> Check the level on your stamp's ATN pin, if it is high this means
that
> the stamp is hold in reset state. The forementinned circuit avoids
> this situation - and improves noise resistance besides that.
>
> One thing more: 12V nominal (17V effective) to Vin is quite a lot,
> I suggest to reduce it to something between 7V and 9V effective to
> lower the stress on the stamp's internal regulator.
>
> Regards
> Adrian