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Discussion Groups | BasicX | Bx-24 reset when opening download port
Discussion forum for the BasicX family of microcontroller chips.
Bx-24 reset when opening download port - jacques_lebrun - Apr 25 11:09:46 2007
Is there a way to prevent the BX-24 from resetting when I open the
download port from the BasicX downloader?
I wrote a configuration program in VB6 and whenever I open the serial
port to the BX-24, it resets like if I resetted its power. I would
like to be able to open / close that port at will without resetting the
BX-24.
Thanks
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download port from the BasicX downloader?
I wrote a configuration program in VB6 and whenever I open the serial
port to the BX-24, it resets like if I resetted its power. I would
like to be able to open / close that port at will without resetting the
BX-24.
Thanks
(You need to be a member of basicx -- send a blank email to basicx-subscribe@yahoogroups.com )
Re: Bx-24 reset when opening download port - Tom Becker - Apr 25 11:54:52 2007
> ... I wrote a configuration program in VB6 and whenever I open the
serial port to the BX-24, it resets...
It's been reported here a few times that Windows cycles DTR when it
opens a serial port. DTR becomes ATN on the BX-24; ATN capacitively
couples to /Reset.
You can prevent the reset by severing DTR/ATN. Common practice puts a
jumper in that line to permit reprogramming of the processor when you
need it; otherwise, DTR will have no effect with the jumper pulled.
Tom
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Re: Bx-24 reset when opening download port - jacques_lebrun - Apr 25 14:24:57 2007
That's it, I did not know Windows was cycling DTR on opening.
Thanks
--- In b...@yahoogroups.com, "Tom Becker" wrote:
> > ... I wrote a configuration program in VB6 and whenever I open the
> serial port to the BX-24, it resets...
>
> It's been reported here a few times that Windows cycles DTR when it
> opens a serial port. DTR becomes ATN on the BX-24; ATN capacitively
> couples to /Reset.
>
> You can prevent the reset by severing DTR/ATN. Common practice puts a
> jumper in that line to permit reprogramming of the processor when you
> need it; otherwise, DTR will have no effect with the jumper pulled.
> Tom
>
(You need to be a member of basicx -- send a blank email to basicx-subscribe@yahoogroups.com )
Thanks
--- In b...@yahoogroups.com, "Tom Becker"
> > ... I wrote a configuration program in VB6 and whenever I open the
> serial port to the BX-24, it resets...
>
> It's been reported here a few times that Windows cycles DTR when it
> opens a serial port. DTR becomes ATN on the BX-24; ATN capacitively
> couples to /Reset.
>
> You can prevent the reset by severing DTR/ATN. Common practice puts a
> jumper in that line to permit reprogramming of the processor when you
> need it; otherwise, DTR will have no effect with the jumper pulled.
> Tom
>
(You need to be a member of basicx -- send a blank email to basicx-subscribe@yahoogroups.com )