Digest Number 1844

Archiver

>
> The problem with my process for you is that it overwrites the
> entire bank --
> so you can't overwrite bank 0 if you're currently running it it.
>
> -- Jon Williams
> -- Parallax
>
Thanks Jon...I think
________________________________________________________________________
>
> Message: 20
> Date: Fri, 06 Jun 2003 11:46:50 -0700
> From: Tracy Allen <tracy@e...>
> Subject: Re: BS2p-24 cloner problems
>
> >Greetings,
> >
> >I am trying to make a cloner from a BS2p-24 to write to another
> BS2p-
> >24. I have the program almost working but it only works with two
> of
> >the six BS2p-24's that I have. I started with the clone.bs2
> program
> >from Tracy Allen's emesystems.com web pages and have modified it
> to
> >send data from the clone's bank 1 to the target's bank 0. The
> other
> >banks are programmed in the same manner, 2 goes to 1, 3 goes to 2.
> >The clone program is in bank 0 and not transmitted.
> >
> >Is there a format for the header that is sent? I suspect I have a
> >timing issue with not receiving the 's' character. Yes, these
> chips
> >send out an 's' not an 'r'. If its not propriatary could someone
> >share it? (or give a link to it?)
> >
> >Thanks
> >Paul
>
> I think the change from "r" to "s" happened with the firmware
> upgrade
> from 1.2 to 1.3 (BS2pe only). It is still possible that you have
> both firmware versions? BTW, the codes for the BS2p-40 are "R" and
>
> "S", again "S" for the most recent firmware. I see my web page
> does
> not reflect that upgrade.
>
> Yes, there is a format, as described on my web page, and I think
> Parllax has that information openly available somewhere now. But
> you
> clearly have that right if your program works on at least one
> BS2p-24--It should work on the others!
>
> regards,
> -- Tracy
>
Tracy & all,

I just found the information imbedded in the Stamp Tokenizer zip
files. The actual file is 'BASIC Stamp Programming Protocol
v1.1.pfd'. It looks like I do have it right except I have a 1uF cap
on the ATN line to ground to prevent unwanted resets. (because of a
noisy environment) I'm going to try running it through a max232 to
get RS-232 instead of the original TTL that was on your web page to
overcome the capacitor. The BS2p's all do program if connected to a
PC serial port so I know its possible! Thanks for the encouragement.
I wonder if there's a market for stamp cloner software....hmmmm.

Paul




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Archiver

Hi Paul,

A 3kohm resistor from ATN to common can also greatly reduce noise
induced resets. I usually use 3k with 0.1uf in parallel, and 0.22uf
in series to the DTR line of the cable. The ATN input threshold is
about 1.4 volts/20 kohms, so even with TTL input to ATN, you have a
lot of voltage to play with to get adequate noise filtering.

Did you try it without the 1uf capacitor? That may be slowing things
down to marginal levels. Or, increase the length of the reset pulse.
It doesn't matter how long it is, but the BREAK condition on the tx
line has to stick around for about 50 milliseconds after the reset
falling edge.

-- Tracy

>
> I just found the information imbedded in the Stamp Tokenizer zip
>files. The actual file is 'BASIC Stamp Programming Protocol
>v1.1.pfd'. It looks like I do have it right except I have a 1uF cap
>on the ATN line to ground to prevent unwanted resets. (because of a
>noisy environment) I'm going to try running it through a max232 to
>get RS-232 instead of the original TTL that was on your web page to
>overcome the capacitor. The BS2p's all do program if connected to a
>PC serial port so I know its possible! Thanks for the encouragement.
>I wonder if there's a market for stamp cloner software....hmmmm.
>
>Paul
>