Re: [misterhouse-users] Serial Ports

[Newton <ki...@es...>]

Hi Bill,
     Thanks for responding.  What I'd like to do is to not use the DTR line.
Before I start MH the DTR line is at -12 volts and the Basic stamp is happy.
(transmitting serial data and blinking an LED for testing.)  After I start MH the
DTR line goes to +12 volts and the Basic Stamp will no longer transmit serial
data.  I've tested this using just a 3-wire system (Tx, Rx and ground) and all is
OK. I would just like to keep the same interface setup for both downloading to
the stamp via its editor and use MH to get any data from the stamp without having
to break the DTR line.   Does this make sense?  - Wally

Bbi...@ao... wrote:

> Hi Wally:
>
> n a message dated 1/24/00 8:37:36 PM Central Standard Time, ki...@es...
> writes:
>
> >     I'm trying to connect a Basic Stamp II to the serial port and give
> >  Mister House some status. The Basic Stamp uses the "DTR" signal for
> >  downloading code. Mister House seems to set this bit so the stamp cannot
> >  transmit.  I've looked at the various "serial" modules and the serial
> >  code in MH.  Tried setting the "dtr_active" to "false" , but without
> >  success.  Has anyone tried this?  - Wally Kissel
>
> Do you have a spec for the download protocol used? Or at least a pointer
> to technical info. Generally, if a device mentions DTR, it wants it "true".
> The CM17 (FireCracker) is an exception - it needs pulses. I don't know
> what Basic Stamp wants.
>
> -bill
>
> _______________________________________________
> misterhouse-users mailing list
> mis...@li...
> http://lists.sourceforge.net/mailman/listinfo/misterhouse-users