ATN Line Noise...
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Posts: 46,084
Hello Everyone,
I am using two BS2's in the preliminary testing for the wireless
application that I had asked for your help with earlier. I now have them
"talking" to one another, but once in a while, one or the other BS2
hangs-up or just freezes mid-program -- most of the time not in the same
place in either program. I suspect noise on the ATN line of the Serial
Port, so I'm using the 0.1 capacitors as shown in the Version 2.0 Stamp
Manual, but the problem persists. I thought that Tracy Allen had also
recommended a resistor in the mix also (ATN pull-down?) on his page
http://www.emesys.com/BS2bugs.htm#top , but the link listed as "Unwanted
resets form noise on the Serial Port ATN line" does not seem to go
anywhere. Anyone have any other ideas? Can I put a pull-down resistor on
the ATN line? Does anything need to be done with any of the other Serial
Port lines?
Thanks,
Tim
Timothy Medema
CrystaLite, Incorporated
3307 Cedar St. (425) 745-6000 800-666-6065
Everett, WA 98201 Fax: (425) 257-0232
www.crystaliteinc.com
<mailto:timm@c...>timm@c...
The information transmitted is intended only for the person or entity to
whom it is addressed and may contain confidential and/or privileged
material. Any review, retransmission, dissemination or other use of, or
taking of any action in reliance upon, this information by persons or
entities other than the intended recipient is prohibited. If you received
this in error, please contact the sender and delete the material from any
computer.
I am using two BS2's in the preliminary testing for the wireless
application that I had asked for your help with earlier. I now have them
"talking" to one another, but once in a while, one or the other BS2
hangs-up or just freezes mid-program -- most of the time not in the same
place in either program. I suspect noise on the ATN line of the Serial
Port, so I'm using the 0.1 capacitors as shown in the Version 2.0 Stamp
Manual, but the problem persists. I thought that Tracy Allen had also
recommended a resistor in the mix also (ATN pull-down?) on his page
http://www.emesys.com/BS2bugs.htm#top , but the link listed as "Unwanted
resets form noise on the Serial Port ATN line" does not seem to go
anywhere. Anyone have any other ideas? Can I put a pull-down resistor on
the ATN line? Does anything need to be done with any of the other Serial
Port lines?
Thanks,
Tim
Timothy Medema
CrystaLite, Incorporated
3307 Cedar St. (425) 745-6000 800-666-6065
Everett, WA 98201 Fax: (425) 257-0232
www.crystaliteinc.com
<mailto:timm@c...>timm@c...
The information transmitted is intended only for the person or entity to
whom it is addressed and may contain confidential and/or privileged
material. Any review, retransmission, dissemination or other use of, or
taking of any action in reliance upon, this information by persons or
entities other than the intended recipient is prohibited. If you received
this in error, please contact the sender and delete the material from any
computer.
Comments
separate breadboards, one for each wireless "end".
Tim
At 07:41 AM 8/8/2002 -0700, you wrote:
>Hello Everyone,
>
> I am using two BS2's in the preliminary testing for the wireless
>application that I had asked for your help with earlier. I now have them
>"talking" to one another, but once in a while, one or the other BS2
>hangs-up or just freezes mid-program -- most of the time not in the same
>place in either program. I suspect noise on the ATN line of the Serial
>Port, so I'm using the 0.1 capacitors as shown in the Version 2.0 Stamp
>Manual, but the problem persists. I thought that Tracy Allen had also
>recommended a resistor in the mix also (ATN pull-down?) on his page
>http://www.emesys.com/BS2bugs.htm#top , but the link listed as "Unwanted
>resets form noise on the Serial Port ATN line" does not seem to go
>anywhere. Anyone have any other ideas? Can I put a pull-down resistor on
>the ATN line? Does anything need to be done with any of the other Serial
>Port lines?
>
>Thanks,
>
>Tim
>
>
>Timothy Medema
>CrystaLite, Incorporated
>3307 Cedar St. (425) 745-6000 800-666-6065
>Everett, WA 98201 Fax: (425) 257-0232
>
>www.crystaliteinc.com
><mailto:timm@c...>timm@c...
>
>
>The information transmitted is intended only for the person or entity to
>whom it is addressed and may contain confidential and/or privileged
>material. Any review, retransmission, dissemination or other use of, or
>taking of any action in reliance upon, this information by persons or
>entities other than the intended recipient is prohibited. If you received
>this in error, please contact the sender and delete the material from any
>computer.
>
>
>To UNSUBSCRIBE, just send mail to:
> basicstamps-unsubscribe@yahoogroups.com
>from the same email address that you subscribed. Text in the Subject and
>Body of the message will be ignored.
>
>
>Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
timm@c... writes:
> I am using two BS2's in the preliminary testing for the wireless
> application that I had asked for your help with earlier. I now have them
> "talking" to one another, but once in a while, one or the other BS2
> hangs-up or just freezes mid-program -- most of the time not in the same
> place in either program. I suspect noise on the ATN line of the Serial
> Port, so I'm using the 0.1 capacitors as shown in the Version 2.0 Stamp
> Manual, but the problem persists. I thought that Tracy Allen had also
> recommended a resistor in the mix also (ATN pull-down?) on his page
> http://www.emesys.com/BS2bugs.htm#top , but the link listed as "Unwanted
> resets form noise on the Serial Port ATN line" does not seem to go
> anywhere. Anyone have any other ideas? Can I put a pull-down resistor on
> the ATN line? Does anything need to be done with any of the other Serial
> Port lines?
>
For Tim:
Make sure that when one xmtr is sending that the associated recvr is
completely disabled. Are you using transceivers or separate xmtrs and
rcvrs ?
Sid
[noparse][[/noparse]Non-text portions of this message have been removed]
http://www.faq-pro.com/faq/index.php?qframe=1&faq=1&article=22
Part of the Stamp FAQ at http://www.wd5gnr.com/stampfaq.htm
Al Williams
AWC
* NEW: PAK-VIa - Read PS/2 keyboards or mice -- double the buffer, lower
current consumption.
http://www.al-williams.com/awce/pak6.htm
>
Original Message
> From: Timothy Medema [noparse]/noparse]mailto:[url=http://forums.parallaxinc.com/group/basicstamps/post?postID=TCxUZNxwKQtf2L3ojlezTbfbsVIu0uxoYYaIPWu-fB9GkmzkmQdF_uIMuxUBRTAPnfzp96ETkb43Cocp]timm@c...[/url
> Sent: Thursday, August 08, 2002 9:42 AM
> To: basicstamps@yahoogroups.com
> Subject: [noparse][[/noparse]basicstamps] ATN Line Noise...
>
>
>
> Hello Everyone,
>
> I am using two BS2's in the preliminary testing for
> the wireless
> application that I had asked for your help with earlier. I
> now have them
> "talking" to one another, but once in a while, one or the other BS2
> hangs-up or just freezes mid-program -- most of the time not
> in the same
> place in either program. I suspect noise on the ATN line of
> the Serial
> Port, so I'm using the 0.1 capacitors as shown in the
> Version 2.0 Stamp
> Manual, but the problem persists. I thought that Tracy Allen
> had also
> recommended a resistor in the mix also (ATN pull-down?) on his page
> http://www.emesys.com/BS2bugs.htm#top , but the link listed
> as "Unwanted
> resets form noise on the Serial Port ATN line" does not seem to go
> anywhere. Anyone have any other ideas? Can I put a
> pull-down resistor on
> the ATN line? Does anything need to be done with any of the
> other Serial
> Port lines?
>
> Thanks,
>
> Tim
>
>
> Timothy Medema
> CrystaLite, Incorporated
> 3307 Cedar St. (425) 745-6000 800-666-6065
> Everett, WA 98201 Fax: (425) 257-0232
>
> www.crystaliteinc.com
> <mailto:timm@c...>timm@c...
>
>
> The information transmitted is intended only for the person
> or entity to
> whom it is addressed and may contain confidential and/or privileged
> material. Any review, retransmission, dissemination or other
> use of, or
> taking of any action in reliance upon, this information by persons or
> entities other than the intended recipient is prohibited. If
> you received
> this in error, please contact the sender and delete the
> material from any
> computer.
>
>
> To UNSUBSCRIBE, just send mail to:
> basicstamps-unsubscribe@yahoogroups.com
> from the same email address that you subscribed. Text in the
> Subject and Body of the message will be ignored.
>
>
> Your use of Yahoo! Groups is subject to
http://docs.yahoo.com/info/terms/
I am using the Parallax SIP transceivers with the fixed antennas,
Part No: 27997. Do I need to do something to ensure that the receivers are
disabled when transmitting? Pull the receive data line low? What I'm
testing right now is a MASTER/SLAVE configuration with the SLAVE running a
"listening" routine, the MASTER sends an a "get the slave's attention"
signal, the SLAVE responds with an "I'm ready for data" signal, the MASTER
transmits the "important data" and then the SLAVE responds with an
"acknowledge" signal.
Tim
At 10:57 AM 8/8/2002 -0400, you wrote:
>In a message dated 08/08/2002 10:43:01 Eastern Daylight Time,
>timm@c... writes:
>
>
> > I am using two BS2's in the preliminary testing for the wireless
> > application that I had asked for your help with earlier. I now have them
> > "talking" to one another, but once in a while, one or the other BS2
> > hangs-up or just freezes mid-program -- most of the time not in the same
> > place in either program. I suspect noise on the ATN line of the Serial
> > Port, so I'm using the 0.1 capacitors as shown in the Version 2.0 Stamp
> > Manual, but the problem persists. I thought that Tracy Allen had also
> > recommended a resistor in the mix also (ATN pull-down?) on his page
> > http://www.emesys.com/BS2bugs.htm#top , but the link listed as "Unwanted
> > resets form noise on the Serial Port ATN line" does not seem to go
> > anywhere. Anyone have any other ideas? Can I put a pull-down resistor on
> > the ATN line? Does anything need to be done with any of the other Serial
> > Port lines?
> >
>
>For Tim:
>
>Make sure that when one xmtr is sending that the associated recvr is
>completely disabled. Are you using transceivers or separate xmtrs and
>rcvrs ?
>
>Sid
>
>
>[noparse][[/noparse]Non-text portions of this message have been removed]
>
>
>To UNSUBSCRIBE, just send mail to:
> basicstamps-unsubscribe@yahoogroups.com
>from the same email address that you subscribed. Text in the Subject and
>Body of the message will be ignored.
>
>
>Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
Thank you for your web information. Per that information though,
the programming cable should never be left connected. I have been using
DEBUG a lot to monitor one end or the other to view what's going on - are
you saying that this should not be done?
Tim
At 09:58 AM 8/8/2002 -0500, you wrote:
>Have a look at the FAQ:
>http://www.faq-pro.com/faq/index.php?qframe=1&faq=1&article=22
>
>Part of the Stamp FAQ at http://www.wd5gnr.com/stampfaq.htm
>
>Al Williams
>AWC
>* NEW: PAK-VIa - Read PS/2 keyboards or mice -- double the buffer, lower
>current consumption.
>http://www.al-williams.com/awce/pak6.htm
>
>
>
>
> >
Original Message
> > From: Timothy Medema [noparse]/noparse]mailto:[url=http://forums.parallaxinc.com/group/basicstamps/post?postID=7skrB3vAtBOdADISUMtT2EH50iYQy30mbMT8uQZMMtetzhGOKIsWaEyfogPq52PHsyHNW-MvIODwuO1q8IY]timm@c...[/url
> > Sent: Thursday, August 08, 2002 9:42 AM
> > To: basicstamps@yahoogroups.com
> > Subject: [noparse][[/noparse]basicstamps] ATN Line Noise...
> >
> >
> >
> > Hello Everyone,
> >
> > I am using two BS2's in the preliminary testing for
> > the wireless
> > application that I had asked for your help with earlier. I
> > now have them
> > "talking" to one another, but once in a while, one or the other BS2
> > hangs-up or just freezes mid-program -- most of the time not
> > in the same
> > place in either program. I suspect noise on the ATN line of
> > the Serial
> > Port, so I'm using the 0.1 capacitors as shown in the
> > Version 2.0 Stamp
> > Manual, but the problem persists. I thought that Tracy Allen
> > had also
> > recommended a resistor in the mix also (ATN pull-down?) on his page
> > http://www.emesys.com/BS2bugs.htm#top , but the link listed
> > as "Unwanted
> > resets form noise on the Serial Port ATN line" does not seem to go
> > anywhere. Anyone have any other ideas? Can I put a
> > pull-down resistor on
> > the ATN line? Does anything need to be done with any of the
> > other Serial
> > Port lines?
> >
> > Thanks,
> >
> > Tim
> >
> >
> > Timothy Medema
> > CrystaLite, Incorporated
> > 3307 Cedar St. (425) 745-6000 800-666-6065
> > Everett, WA 98201 Fax: (425) 257-0232
> >
> > www.crystaliteinc.com
> > <mailto:timm@c...>timm@c...
> >
> >
> > The information transmitted is intended only for the person
> > or entity to
> > whom it is addressed and may contain confidential and/or privileged
> > material. Any review, retransmission, dissemination or other
> > use of, or
> > taking of any action in reliance upon, this information by persons or
> > entities other than the intended recipient is prohibited. If
> > you received
> > this in error, please contact the sender and delete the
> > material from any
> > computer.
> >
> >
> > To UNSUBSCRIBE, just send mail to:
> > basicstamps-unsubscribe@yahoogroups.com
> > from the same email address that you subscribed. Text in the
> > Subject and Body of the message will be ignored.
> >
> >
> > Your use of Yahoo! Groups is subject to
>http://docs.yahoo.com/info/terms/
>
>
>To UNSUBSCRIBE, just send mail to:
> basicstamps-unsubscribe@yahoogroups.com
>from the same email address that you subscribed. Text in the Subject and
>Body of the message will be ignored.
>
>
>Your use of Yahoo! Groups is subject to http://docs.yahoo.com/info/terms/
Timothy Medema
CrystaLite, Incorporated
3307 Cedar St. (425) 745-6000 800-666-6065
Everett, WA 98201 Fax: (425) 257-0232
www.crystaliteinc.com
<mailto:timm@c...>timm@c...
The information transmitted is intended only for the person or entity to
whom it is addressed and may contain confidential and/or privileged
material. Any review, retransmission, dissemination or other use of, or
taking of any action in reliance upon, this information by persons or
entities other than the intended recipient is prohibited. If you received
this in error, please contact the sender and delete the material from any
computer.
Actually I didn't write that (if you notice, the author's name is at the
bottom). But I think what he means is don't leave the cable attached to
the BS2 and unattached at the other end.
Perhaps I'll edit that article to reflect that.
Al Williams
AWC
* Floating point A/D
http://www.al-williams.com/awce/pak9.htm
>
Original Message
> From: Timothy Medema [noparse]/noparse]mailto:[url=http://forums.parallaxinc.com/group/basicstamps/post?postID=EMX-d3EKm0h9oX-fR3WzKAUEoWCOIsmXiV850KH4M5STD6xZcIDQax9-0-C437ovYtoJz-D8BG1ES6zhdA]timm@c...[/url
> Sent: Thursday, August 08, 2002 10:31 AM
> To: basicstamps@yahoogroups.com
> Subject: RE: [noparse][[/noparse]basicstamps] ATN Line Noise...
>
>
>
> Hello Al,
>
> Thank you for your web information. Per that
> information though,
> the programming cable should never be left connected. I have
> been using
> DEBUG a lot to monitor one end or the other to view what's
> going on - are
> you saying that this should not be done?
>
> Tim
>
>
> At 09:58 AM 8/8/2002 -0500, you wrote:
> >Have a look at the FAQ:
> >http://www.faq-pro.com/faq/index.php?qframe=1&faq=1&article=22
> >
> >Part of the Stamp FAQ at http://www.wd5gnr.com/stampfaq.htm
> >
> >Al Williams
> >AWC
> >* NEW: PAK-VIa - Read PS/2 keyboards or mice -- double the buffer,
> >lower current consumption. http://www.al-williams.com/awce/pak6.htm
> >
> >
> >
> >
> > >
Original Message
> > > From: Timothy Medema [noparse]/noparse]mailto:[url=http://forums.parallaxinc.com/group/basicstamps/post?postID=EMX-d3EKm0h9oX-fR3WzKAUEoWCOIsmXiV850KH4M5STD6xZcIDQax9-0-C437ovYtoJz-D8BG1ES6zhdA]timm@c...[/url
> > > Sent: Thursday, August 08, 2002 9:42 AM
> > > To: basicstamps@yahoogroups.com
> > > Subject: [noparse][[/noparse]basicstamps] ATN Line Noise...
> > >
> > >
> > >
> > > Hello Everyone,
> > >
> > > I am using two BS2's in the preliminary testing for the
> > > wireless application that I had asked for your help with
> earlier. I
> > > now have them
> > > "talking" to one another, but once in a while, one or the
> other BS2
> > > hangs-up or just freezes mid-program -- most of the time not in
> > > the same place in either program. I suspect noise on the ATN line
> > > of the Serial
> > > Port, so I'm using the 0.1 capacitors as shown in the
> > > Version 2.0 Stamp
> > > Manual, but the problem persists. I thought that Tracy Allen
> > > had also
> > > recommended a resistor in the mix also (ATN pull-down?)
> on his page
> > > http://www.emesys.com/BS2bugs.htm#top , but the link listed as
> > > "Unwanted resets form noise on the Serial Port ATN line" does not
> > > seem to go anywhere. Anyone have any other ideas? Can I put a
> > > pull-down resistor on
> > > the ATN line? Does anything need to be done with any of the
> > > other Serial
> > > Port lines?
> > >
> > > Thanks,
> > >
> > > Tim
> > >
> > >
> > > Timothy Medema
> > > CrystaLite, Incorporated
> > > 3307 Cedar St. (425) 745-6000 800-666-6065
> > > Everett, WA 98201 Fax: (425) 257-0232
> > >
> > > www.crystaliteinc.com
> > > <mailto:timm@c...>timm@c...
> > >
> > >
> > > The information transmitted is intended only for the person or
> > > entity to whom it is addressed and may contain
> confidential and/or
> > > privileged material. Any review, retransmission,
> dissemination or
> > > other use of, or
> > > taking of any action in reliance upon, this information
> by persons or
> > > entities other than the intended recipient is prohibited. If you
> > > received this in error, please contact the sender and delete the
> > > material from any
> > > computer.
> > >
> > >
> > > To UNSUBSCRIBE, just send mail to:
> > > basicstamps-unsubscribe@yahoogroups.com
> > > from the same email address that you subscribed. Text in the
> > > Subject and Body of the message will be ignored.
> > >
> > >
> > > Your use of Yahoo! Groups is subject to
> >http://docs.yahoo.com/info/terms/
> >
> >
> >To UNSUBSCRIBE, just send mail to:
> > basicstamps-unsubscribe@yahoogroups.com
> >from the same email address that you subscribed. Text in
> the Subject
> >and
> >Body of the message will be ignored.
> >
> >
> >Your use of Yahoo! Groups is subject to
> >http://docs.yahoo.com/info/terms/
>
> Timothy Medema
> CrystaLite, Incorporated
> 3307 Cedar St. (425) 745-6000 800-666-6065
> Everett, WA 98201 Fax: (425) 257-0232
>
www.crystaliteinc.com
<mailto:timm@c...>timm@c...
The information transmitted is intended only for the person or entity to
whom it is addressed and may contain confidential and/or privileged
material. Any review, retransmission, dissemination or other use of, or
taking of any action in reliance upon, this information by persons or
entities other than the intended recipient is prohibited. If you
received
this in error, please contact the sender and delete the material from
any
computer.
To UNSUBSCRIBE, just send mail to:
basicstamps-unsubscribe@yahoogroups.com
from the same email address that you subscribed. Text in the Subject
and Body of the message will be ignored.
Your use of Yahoo! Groups is subject to
http://docs.yahoo.com/info/terms/
other end" so I am certain that what it means.
Al Williams
AWC
* Floating point A/D
http://www.al-williams.com/awce/pak9.htm
>
Original Message
> From: Timothy Medema [noparse]/noparse]mailto:[url=http://forums.parallaxinc.com/group/basicstamps/post?postID=aneAFv_8Nq4nocX8b8Z8bEhiVCMVWdlpBy12Rc6akVMnuEmoLLbw11ybK0z5fjNF_5DWhbP54QGtIKvWIQ]timm@c...[/url
> Sent: Thursday, August 08, 2002 10:31 AM
> To: basicstamps@yahoogroups.com
> Subject: RE: [noparse][[/noparse]basicstamps] ATN Line Noise...
>
>
>
> Hello Al,
>
> Thank you for your web information. Per that
> information though,
> the programming cable should never be left connected. I have
> been using
> DEBUG a lot to monitor one end or the other to view what's
> going on - are
> you saying that this should not be done?
>
> Tim
>
>
> At 09:58 AM 8/8/2002 -0500, you wrote:
> >Have a look at the FAQ:
> >http://www.faq-pro.com/faq/index.php?qframe=1&faq=1&article=22
> >
> >Part of the Stamp FAQ at http://www.wd5gnr.com/stampfaq.htm
> >
> >Al Williams
> >AWC
> >* NEW: PAK-VIa - Read PS/2 keyboards or mice -- double the buffer,
> >lower current consumption. http://www.al-williams.com/awce/pak6.htm
> >
> >
> >
> >
> > >
Original Message
> > > From: Timothy Medema [noparse]/noparse]mailto:[url=http://forums.parallaxinc.com/group/basicstamps/post?postID=aneAFv_8Nq4nocX8b8Z8bEhiVCMVWdlpBy12Rc6akVMnuEmoLLbw11ybK0z5fjNF_5DWhbP54QGtIKvWIQ]timm@c...[/url
> > > Sent: Thursday, August 08, 2002 9:42 AM
> > > To: basicstamps@yahoogroups.com
> > > Subject: [noparse][[/noparse]basicstamps] ATN Line Noise...
> > >
> > >
> > >
> > > Hello Everyone,
> > >
> > > I am using two BS2's in the preliminary testing for the
> > > wireless application that I had asked for your help with
> earlier. I
> > > now have them
> > > "talking" to one another, but once in a while, one or the
> other BS2
> > > hangs-up or just freezes mid-program -- most of the time not in
> > > the same place in either program. I suspect noise on the ATN line
> > > of the Serial
> > > Port, so I'm using the 0.1 capacitors as shown in the
> > > Version 2.0 Stamp
> > > Manual, but the problem persists. I thought that Tracy Allen
> > > had also
> > > recommended a resistor in the mix also (ATN pull-down?)
> on his page
> > > http://www.emesys.com/BS2bugs.htm#top , but the link listed as
> > > "Unwanted resets form noise on the Serial Port ATN line" does not
> > > seem to go anywhere. Anyone have any other ideas? Can I put a
> > > pull-down resistor on
> > > the ATN line? Does anything need to be done with any of the
> > > other Serial
> > > Port lines?
> > >
> > > Thanks,
> > >
> > > Tim
> > >
> > >
> > > Timothy Medema
> > > CrystaLite, Incorporated
> > > 3307 Cedar St. (425) 745-6000 800-666-6065
> > > Everett, WA 98201 Fax: (425) 257-0232
> > >
> > > www.crystaliteinc.com
> > > <mailto:timm@c...>timm@c...
> > >
> > >
> > > The information transmitted is intended only for the person or
> > > entity to whom it is addressed and may contain
> confidential and/or
> > > privileged material. Any review, retransmission,
> dissemination or
> > > other use of, or
> > > taking of any action in reliance upon, this information
> by persons or
> > > entities other than the intended recipient is prohibited. If you
> > > received this in error, please contact the sender and delete the
> > > material from any
> > > computer.
> > >
> > >
> > > To UNSUBSCRIBE, just send mail to:
> > > basicstamps-unsubscribe@yahoogroups.com
> > > from the same email address that you subscribed. Text in the
> > > Subject and Body of the message will be ignored.
> > >
> > >
> > > Your use of Yahoo! Groups is subject to
> >http://docs.yahoo.com/info/terms/
> >
> >
> >To UNSUBSCRIBE, just send mail to:
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>
> Timothy Medema
> CrystaLite, Incorporated
> 3307 Cedar St. (425) 745-6000 800-666-6065
> Everett, WA 98201 Fax: (425) 257-0232
>
www.crystaliteinc.com
<mailto:timm@c...>timm@c...
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My mistake - haste makes waste, I should have read it closer
before posting. I have not left the programming cable "without the PC at
the other end" to act as a noise antenna, and have had the freezing problem
with both breadboards - with and without the cable connected for DEBUG
purposes.
Tim
At 10:39 AM 8/8/2002 -0500, you wrote:
>Oh, in fact, if you look at the question it says "without the PC at the
>other end" so I am certain that what it means.
>
>Al Williams
>AWC
>* Floating point A/D
>http://www.al-williams.com/awce/pak9.htm
>
>
> >
Original Message
> > From: Timothy Medema [noparse]/noparse]mailto:[url=http://forums.parallaxinc.com/group/basicstamps/post?postID=ifvY6zgGaV3rmmWZ3jRj4kaCy8JvhsGCbDUZ93xTO2lTuwNuvK9senK1lLiDGMlfN7EyD2MjkELJvwJo]timm@c...[/url
> > Sent: Thursday, August 08, 2002 10:31 AM
> > To: basicstamps@yahoogroups.com
> > Subject: RE: [noparse][[/noparse]basicstamps] ATN Line Noise...
> >
> >
> >
> > Hello Al,
> >
> > Thank you for your web information. Per that
> > information though,
> > the programming cable should never be left connected. I have
> > been using
> > DEBUG a lot to monitor one end or the other to view what's
> > going on - are
> > you saying that this should not be done?
> >
> > Tim
> >
> >
> > At 09:58 AM 8/8/2002 -0500, you wrote:
> > >Have a look at the FAQ:
> > >http://www.faq-pro.com/faq/index.php?qframe=1&faq=1&article=22
> > >
> > >Part of the Stamp FAQ at http://www.wd5gnr.com/stampfaq.htm
> > >
> > >Al Williams
> > >AWC
> > >* NEW: PAK-VIa - Read PS/2 keyboards or mice -- double the buffer,
> > >lower current consumption. http://www.al-williams.com/awce/pak6.htm
> > >
> > >
> > >
> > >
> > > >
Original Message
> > > > From: Timothy Medema [noparse]/noparse]mailto:[url=http://forums.parallaxinc.com/group/basicstamps/post?postID=ifvY6zgGaV3rmmWZ3jRj4kaCy8JvhsGCbDUZ93xTO2lTuwNuvK9senK1lLiDGMlfN7EyD2MjkELJvwJo]timm@c...[/url
> > > > Sent: Thursday, August 08, 2002 9:42 AM
> > > > To: basicstamps@yahoogroups.com
> > > > Subject: [noparse][[/noparse]basicstamps] ATN Line Noise...
> > > >
> > > >
> > > >
> > > > Hello Everyone,
> > > >
> > > > I am using two BS2's in the preliminary testing for the
> > > > wireless application that I had asked for your help with
> > earlier. I
> > > > now have them
> > > > "talking" to one another, but once in a while, one or the
> > other BS2
> > > > hangs-up or just freezes mid-program -- most of the time not in
> > > > the same place in either program. I suspect noise on the ATN line
>
> > > > of the Serial
> > > > Port, so I'm using the 0.1 capacitors as shown in the
> > > > Version 2.0 Stamp
> > > > Manual, but the problem persists. I thought that Tracy Allen
> > > > had also
> > > > recommended a resistor in the mix also (ATN pull-down?)
> > on his page
> > > > http://www.emesys.com/BS2bugs.htm#top , but the link listed as
> > > > "Unwanted resets form noise on the Serial Port ATN line" does not
> > > > seem to go anywhere. Anyone have any other ideas? Can I put a
> > > > pull-down resistor on
> > > > the ATN line? Does anything need to be done with any of the
> > > > other Serial
> > > > Port lines?
> > > >
> > > > Thanks,
> > > >
> > > > Tim
> > > >
> > > >
> > > > Timothy Medema
> > > > CrystaLite, Incorporated
> > > > 3307 Cedar St. (425) 745-6000 800-666-6065
> > > > Everett, WA 98201 Fax: (425) 257-0232
> > > >
> > > > www.crystaliteinc.com
> > > > <mailto:timm@c...>timm@c...
> > > >
> > > >
> > > > The information transmitted is intended only for the person or
> > > > entity to whom it is addressed and may contain
> > confidential and/or
> > > > privileged material. Any review, retransmission,
> > dissemination or
> > > > other use of, or
> > > > taking of any action in reliance upon, this information
> > by persons or
> > > > entities other than the intended recipient is prohibited. If you
> > > > received this in error, please contact the sender and delete the
> > > > material from any
> > > > computer.
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> > > > To UNSUBSCRIBE, just send mail to:
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> > >
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> >
> > Timothy Medema
> > CrystaLite, Incorporated
> > 3307 Cedar St. (425) 745-6000 800-666-6065
> > Everett, WA 98201 Fax: (425) 257-0232
> >
>www.crystaliteinc.com
><mailto:timm@c...>timm@c...
>
>
>The information transmitted is intended only for the person or entity to
>
>whom it is addressed and may contain confidential and/or privileged
>material. Any review, retransmission, dissemination or other use of, or
>
>taking of any action in reliance upon, this information by persons or
>entities other than the intended recipient is prohibited. If you
>received
>this in error, please contact the sender and delete the material from
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Timothy Medema
CrystaLite, Incorporated
3307 Cedar St. (425) 745-6000 800-666-6065
Everett, WA 98201 Fax: (425) 257-0232
www.crystaliteinc.com
<mailto:timm@c...>timm@c...
The information transmitted is intended only for the person or entity to
whom it is addressed and may contain confidential and/or privileged
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this in error, please contact the sender and delete the material from any
computer.
timm@c... writes:
> I am using the Parallax SIP transceivers with the fixed antennas,
> Part No: 27997. Do I need to do something to ensure that the receivers are
> disabled when transmitting? Pull the receive data line low? What I'm
> testing right now is a MASTER/SLAVE configuration with the SLAVE running a
> "listening" routine, the MASTER sends an a "get the slave's attention"
> signal, the SLAVE responds with an "I'm ready for data" signal, the MASTER
> transmits the "important data" and then the SLAVE responds with an
> "acknowledge" signal.
>
For Tim
I use separate units so I don't know the pins on the transceiver. Maybe the
recvr is automatically disabled when you transmit - don't know. I do know
that it is imperative that the associated recvr be disabled when transmitting.
I'm going to the Parallax site and have a look. I'll get back to you if I
find anything. I assume one of the breadboards is tied to your PC via the
serial cable so you can tell it what to xmit. Is the other breadboard a
stand-alone ?
Does it serout a message in response to a serin ?
Can't imagine the ATN line causing a problem.
Sid
[noparse][[/noparse]Non-text portions of this message have been removed]
pol. cap attached + to ATN and - to GND .1uf cap
I should have provided more information. Each "end" is a
stand-alone breadboard with a BS2 and transceiver. The transceiver is a
simple hook-up: +5VDC, Three Ground Pins, Tx Pin, and Rx Pin. The
transceiver is controlled by each BS2 using SEROUT to the Tx Pin to
transmit and SERIN form the Rx Pin to receive. The documentation supplied
with the transceiver modules is a single sheet by RF Digital, covering only
the VERY basics of hook-up and the mention of using SEROUT and SERIN
commands to transmit and receive - no code examples. Parallax tech support
has told me over the phone that they are writing additional
documentation. So, I guess I've taken the long way around to answer you
question - yes, I'm using the serial out and in commands. Wether or not
the one or the other side of the transceiver needs to be disabled while the
other side is being used, I don't know or have documentation on.
Does that help?
Tim
At 11:47 AM 8/8/2002 -0400, you wrote:
>In a message dated 08/08/2002 11:15:54 Eastern Daylight Time,
>timm@c... writes:
>
>
> > I am using the Parallax SIP transceivers with the fixed antennas,
> > Part No: 27997. Do I need to do something to ensure that the receivers
> are
> > disabled when transmitting? Pull the receive data line low? What I'm
> > testing right now is a MASTER/SLAVE configuration with the SLAVE running a
> > "listening" routine, the MASTER sends an a "get the slave's attention"
> > signal, the SLAVE responds with an "I'm ready for data" signal, the MASTER
> > transmits the "important data" and then the SLAVE responds with an
> > "acknowledge" signal.
> >
>
>For Tim
>
>I use separate units so I don't know the pins on the transceiver. Maybe the
>recvr is automatically disabled when you transmit - don't know. I do know
>that it is imperative that the associated recvr be disabled when transmitting.
>I'm going to the Parallax site and have a look. I'll get back to you if I
>find anything. I assume one of the breadboards is tied to your PC via the
>serial cable so you can tell it what to xmit. Is the other breadboard a
>stand-alone ?
>Does it serout a message in response to a serin ?
>
>Can't imagine the ATN line causing a problem.
>
>Sid
>
>
>[noparse][[/noparse]Non-text portions of this message have been removed]
>
>
>To UNSUBSCRIBE, just send mail to:
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Timothy Medema
CrystaLite, Incorporated
3307 Cedar St. (425) 745-6000 800-666-6065
Everett, WA 98201 Fax: (425) 257-0232
www.crystaliteinc.com
<mailto:timm@c...>timm@c...
The information transmitted is intended only for the person or entity to
whom it is addressed and may contain confidential and/or privileged
material. Any review, retransmission, dissemination or other use of, or
taking of any action in reliance upon, this information by persons or
entities other than the intended recipient is prohibited. If you received
this in error, please contact the sender and delete the material from any
computer.
>
> I am using two BS2's in the preliminary testing for the wireless
>application that I had asked for your help with earlier. I now have them
>"talking" to one another, but once in a while, one or the other BS2
>hangs-up or just freezes mid-program -- most of the time not in the same
>place in either program. I suspect noise on the ATN line of the Serial
>Port, so I'm using the 0.1 capacitors as shown in the Version 2.0 Stamp
>Manual, but the problem persists. I thought that Tracy Allen had also
>recommended a resistor in the mix also (ATN pull-down?) on his page
>http://www.emesys.com/BS2bugs.htm#top , but the link listed as "Unwanted
>resets form noise on the Serial Port ATN line" does not seem to go
>anywhere. Anyone have any other ideas? Can I put a pull-down resistor on
>the ATN line? Does anything need to be done with any of the other Serial
>Port lines?
>
>Thanks,
>
>Tim
>
>
>Timothy Medema
>CrystaLite, Incorporated
>3307 Cedar St. (425) 745-6000 800-666-6065
>Everett, WA 98201 Fax: (425) 257-0232
>
>www.crystaliteinc.com
><mailto:timm@c...>timm@c...
>
>
>The information transmitted is intended only for the person or entity to
>whom it is addressed and may contain confidential and/or privileged
>material. Any review, retransmission, dissemination or other use of, or
>taking of any action in reliance upon, this information by persons or
>entities other than the intended recipient is prohibited. If you received
>this in error, please contact the sender and delete the material from any
>computer.
>
>
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Thanks for the heads up on the link. It is fixed now to point here...
http://www.emesystems.com/BS2rs232.htm#resets
The circuit I use is this,
DB9S ---||
;
/\/\/---;
pin4 0.22 | 3.3k |
optional |
||
|
| 0.1 |
atn ground
which includes the resistor to lower the input resistance of the ATN
circuit from 10k down to 3k. The idea is to generate a short pulse
of that reaches 2.5 volts for a fraction of a millisecond into the
atn pin when a genuine 0-->5 volt stiff reset signal comes in on pin4
of the DB9. The response to the less stiff fake signals that come
from noise should not bring the circuit up to that reset threshold.
If you do a RC circuit model of capacitively coupled noise, it helps
to have the resistor in parallel with the ATN input, as well as the
capacitors.
-- Tracy
> >Hello Everyone,
> >
> > I am using two BS2's in the preliminary testing for the wireless
> >application that I had asked for your help with earlier. I now have them
> >"talking" to one another, but once in a while, one or the other BS2
> >hangs-up or just freezes mid-program -- most of the time not in the same
> >place in either program. I suspect noise on the ATN line of the Serial
> >Port, so I'm using the 0.1 capacitors as shown in the Version 2.0 Stamp
> >Manual, but the problem persists. I thought that Tracy Allen had also
> >recommended a resistor in the mix also (ATN pull-down?) on his page
> >http://www.emesys.com/BS2bugs.htm#top , but the link listed as "Unwanted
> >resets form noise on the Serial Port ATN line" does not seem to go
> >anywhere. Anyone have any other ideas? Can I put a pull-down resistor on
> >the ATN line? Does anything need to be done with any of the other Serial
> >Port lines?
> >
> >Thanks,
> >
> >Tim
> >
> >
> >Timothy Medema
> >CrystaLite, Incorporated
> >3307 Cedar St. (425) 745-6000 800-666-6065
> >Everett, WA 98201 Fax: (425) 257-0232
> >
> >www.crystaliteinc.com
> ><mailto:timm@c...>timm@c...
> >
>
>Thanks for the heads up on the link. It is fixed now to point here...
> http://www.emesystems.com/BS2rs232.htm#resets
>
>The circuit I use is this,
>
>
> DB9S ---||
;
/\/\/---;
> pin4 0.22 | 3.3k |
> optional |
||
|
> | 0.1 |
> atn ground
>
>which includes the resistor to lower the input resistance of the ATN
>circuit from 10k down to 3k. The idea is to generate a short pulse
>of that reaches 2.5 volts for a fraction of a millisecond into the
>atn pin when a genuine 0-->5 volt stiff reset signal comes in on pin4
>of the DB9. The response to the less stiff fake signals that come
>from noise should not bring the circuit up to that reset threshold.
>If you do a RC circuit model of capacitively coupled noise, it helps
>to have the resistor in parallel with the ATN input, as well as the
>capacitors.
>
> -- Tracy
>
>
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Hello Tracy,
I thought that I'd read (a long time ago) that you'd used a
resistor to lower the input impedance of the programming serial
port. Thank you for this information and for the link repair.
Much appreciated,
Tim
timm@c... writes:
> Does that help?
>
Very much. Let me check and I'll get back to you.
Sid
[noparse][[/noparse]Non-text portions of this message have been removed]
Tim
At 12:59 PM 8/8/2002 -0400, you wrote:
>In a message dated 08/08/2002 12:10:43 Eastern Daylight Time,
>timm@c... writes:
>
>
> > Does that help?
> >
>
>Very much. Let me check and I'll get back to you.
>
>Sid
>
>
>[noparse][[/noparse]Non-text portions of this message have been removed]
>
>
>To UNSUBSCRIBE, just send mail to:
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timm@c... writes:
> documentation. So, I guess I've taken the long way around to answer you
> question - yes, I'm using the serial out and in commands. Wether or not
> the one or the other side of the transceiver needs to be disabled while the
> other side is being used, I don't know or have documentation on.
>
>
Tim, go to www.rfdigital.com. They are the manufacturers and should have
everything on their site. If you need to talk to them their number is
818-541-7622
Hope this helps.
Sid
[noparse][[/noparse]Non-text portions of this message have been removed]
Thanks for the link, but I've already been to RF Digital and they
don't have any additional information. The sheet that came with the
transceiver modules was written by RF Digital and has PRELIMINARY
DOCUMENTATION printed at the beginning and end of the information. It
would be a good idea to call them though.
Thanks for caring enough to put in that time to dig for me,
Tim
At 05:02 PM 8/8/2002 -0400, you wrote:
>In a message dated 08/08/2002 12:10:43 Eastern Daylight Time,
>timm@c... writes:
>
>
> > documentation. So, I guess I've taken the long way around to answer you
> > question - yes, I'm using the serial out and in commands. Wether or not
> > the one or the other side of the transceiver needs to be disabled while
> the
> > other side is being used, I don't know or have documentation on.
> >
> >
>
>Tim, go to www.rfdigital.com. They are the manufacturers and should have
>everything on their site. If you need to talk to them their number is
>818-541-7622
>
>Hope this helps.
>
>Sid
>
>
>[noparse][[/noparse]Non-text portions of this message have been removed]
>
>
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