P40 Demo Board - Accessing Sout Sin
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I just got my P40 demo board from parallax, awesome little bugger,
but how do I access the Sout/Sin pins? All of the output pins seem
to be brought out to convinent little blocks for jumping, but not
Sout/Sin?
Am I missing the obvious?
Any help appreciated.
-John
but how do I access the Sout/Sin pins? All of the output pins seem
to be brought out to convinent little blocks for jumping, but not
Sout/Sin?
Am I missing the obvious?
Any help appreciated.
-John
Comments
>I just got my P40 demo board from parallax, awesome little bugger,
>but how do I access the Sout/Sin pins? All of the output pins seem
>to be brought out to convinent little blocks for jumping, but not
>Sout/Sin?
>
>Am I missing the obvious?
>
>Any help appreciated.
>
>-John
John -
Sin and Sout should appear on the DB9-F programming port connector. You can use
any pin/port you choose to for Serin and Serout however. You are not
restricted
to Sin and Sout although they are level adjusted for RS-232 communications.
Note
also that Sin/Sout will echo data back to the sender. If necessary for your
application, the echoed data may have to be discarded.
Regards,
Bruce Bates
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You can use any pin/port you choose to for Serin and Serout however.
You are not restricted to Sin and Sout although they are level
adjusted for RS-232 communications.
Note also that Sin/Sout will echo data back to the sender. If
necessary for your application, the echoed data may have to be
discarded."
Thanks for the reply Bruce.
So I can use any pin for serial communications, that helps. If I
did want to use sin/sout pins what do I do, program the stamp, have
it wait a minute while I disconnect the programming cable, and plug
in my serial device? Then have the stamp take off again?
Us newbies are a tough bunch [noparse]:)[/noparse]
-John
>"Sin and Sout should appear on the DB9-F programming port connector.
>You can use any pin/port you choose to for Serin and Serout however.
>You are not restricted to Sin and Sout although they are level
>adjusted for RS-232 communications.
>
>Note also that Sin/Sout will echo data back to the sender. If
>necessary for your application, the echoed data may have to be
>discarded."
>
>
>Thanks for the reply Bruce.
>
>So I can use any pin for serial communications, that helps. If I
>did want to use sin/sout pins what do I do, program the stamp, have
>it wait a minute while I disconnect the programming cable, and plug
>in my serial device? Then have the stamp take off again?
That's certainly one method. If you have control of the "other" end, you
may want to use the WAIT parameter of Serin to wait for a certain character
or set of characters to let you know that it's time to do processing.
>Us newbies are a tough bunch [noparse]:)[/noparse]
>We all atarted there at one time :-)
>-John
>
>Bruce
Notes:
1. The Sin and Sout use the other system's TX line
for voltage, so the other system MUST set the
TX line to -12 volts.
2. Keeping DTR 'active' (+12) will hold the BS2 in
reset. Either use two .1 uF caps to decouple this,
or don't connect DTR, or keep DTR 'inactive'.
--- In basicstamps@yahoogroups.com, "ufi911" <john@l...> wrote:
> "Sin and Sout should appear on the DB9-F programming port
connector.
> You can use any pin/port you choose to for Serin and Serout
however.
> You are not restricted to Sin and Sout although they are level
> adjusted for RS-232 communications.
>
> Note also that Sin/Sout will echo data back to the sender. If
> necessary for your application, the echoed data may have to be
> discarded."
>
>
> Thanks for the reply Bruce.
>
> So I can use any pin for serial communications, that helps. If I
> did want to use sin/sout pins what do I do, program the stamp, have
> it wait a minute while I disconnect the programming cable, and plug
> in my serial device? Then have the stamp take off again?
>
> Us newbies are a tough bunch [noparse]:)[/noparse]
>
> -John