Can''t Communicate. Help.
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Hello Dennis;
Did some basic tests & measurements on my BS2P connected to my
Fujitsu Lifebook laptop. Voltages on Stamp Pins 1,2, & 3 are -2.6, -
5.5, and -5.5. (So much for an invalid level!) Scoped the ATN pin
(3 on the stamp) during Identify and observed 4 positive pulses of
approx 20 ms duration each. I then isolated DTR from the PC to the
Stamp ATN and got exactly the same indication you have indicated,
loopback - yes, echo - yes, but nothing else. It appears that DTR to
the ATN pin on your stamp has a problem. Using my DVM the -5.5 does
raise to about -4.6 during the pulses but if you have a scope then
you can verify DTR coming into the Stamp pulses to a positive value.
Good luck, Hal
--- In basicstamps@yahoogroups.com, Dennis Landwehr <djlandwehr@y...>
wrote:
> Hi Hal,
>
> Thanks for responding. This Rogue 'Stamp Stick 2SX' calls for a DC
input
> from 6 to 18 volts, derated at higher voltages because the on-board
> regulator gets hot...my non-contact IR thermometer saw over 200
degrees F
> while I was running the original, working one off the 17V my 12V
nominal
> wall wart puts out. So I put a 7806 off-board to dissipate the
heat, and
> wound up with 5.88V or so, just below the 6V spec, on the Vin pin,
which
> is regulated down to 4.95V with an on-board reg. I have,
naturally, tried
> bypassing the 7806 temporarily, and running the thing off a 9V
battery,
> and neither gets the comms going or changes the 4.95V coming from
the
> on-board reg.
>
> I wondered too about my PCs ports or some damage there but since my
two
> PCs communicate with each other through a null-modem cable, and a
serial
> mouse works on the same port, I feel it unlikely that there's a
problem
> there. Also, on the Compaq running BS editor 1.33 (Win 98) the
loopback
> and echo tests are passed at the start of the Identify routine, and
I've
> established that the various characters of the BeXPI phrase that
gets sent
> and echoed must be 'heard' by the PC, even at the -3V level, since
if
> there is no stamp connected it never gets past the "B".
>
> It's a frustrating puzzle. I'm still wondering how to find out
exactly
> how the Identify function works; just what characters are normally
sent
> and recieved to identify the stamp out there. I think the BeXPI
might be
> just the start of a longer sequence that is being aborted for some
reason.
>
> --- Hal ALbach <halbach@f...> wrote:
> > I'm wondering why you are applying 6 volts to the stamp unless it
is
> > to the Vin pin for it's own on board regulator (if your version
has
> > one). Direct input to Vdd per the manual is 4.5 to 5.5 Volts.
Also
> > I think -3 volt RS232 signal is very close to invalid. Sounds
like
> > maybe your soldering event damaged the original "stick" which may
> > have damaged your PC port. If you can, try to do a complete
external
> > loopback test on your PC Comm port to insure that ALL pins are
> > functioning properly.
> >
> > --- In basicstamps@yahoogroups.com, "djlandwehr"
<djlandwehr@y...>
> > wrote:
> > > Hi. I'm new to the group so forgive me if this has been
covered, or
> > > please refer me to earlier posts my searches missed.
> > >
> > > I bought a "Stamp Stick 2SX" from Rogue Robotics based on the
> > > PArallax Stamp 2SX, on a 30-pin SIM type PC Bpard w/proto
space.
> > All
> > > was fine, many programming iterations until my hamhanded
soldering
> > > finally messed something up and it no longer communicated.
> > >
> > > I got another, and now a third, and neither of them has ever
> > > been "identified" by my Compaq 1245 win 98 running BS Editor
1.33
> > > (same as had worked on stick #1). I have connected only DC
power
> > > (through a 7806 regulator for +6Vdc normally, also from a 9v
> > battery
> > > or 12V nominal (17V actual) dc wall wart for tests), and the 4
> > > straight through comm lines (Sin, Sout, ATN (reset), and Ground
to
> > DB-
> > > 9 pins 2,3,4,&5 as Rouge specifies (and worked earlier).
> > >
> > > I have also tried Stamp2sx.com in a DOS window and on an older
> > > 486sx33 laptop I resurrected for the purpose. I made another
DB9
> > > with clip leads connected to pin 2 & 5 (input * ground) so I
> > > can "listen" to the serial characters sent to & from the PC and
> > > stamp. During the V1.33 'Identify' routine the PC sends, and
the
> > > Stamp Echos (both at 9600 baud) the characters B,e,X,P & I
> > (commas ,
> > > ampersand & spaces added) and the identify window
says "Loopback
> > Yes,
> > > Echo Yes, but no device type or version.
> > >
> > > The RS232 voltages are nominally OK (-3, -7, -7 or so for Sin,
> > Sout,
> > > and ATN, rising during 'identify')
> > >
> > > I've tried all I can think of to no avail. Again, this is the
> > > second, maybe third stamp stick affected. I've tried changing
> > > stamps, software, computers (and the two computers were able to
> > > communicate serially with each other, so the ports seem OK).
Any
> > > help would be appreciated.
> > >
> > > DJlandwehr
> >
> >
> > 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/
> >
> >
>
>
> __________________________________________________
> Do you Yahoo!?
> Yahoo! Platinum - Watch CBS' NCAA March Madness, live on your
desktop!
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Did some basic tests & measurements on my BS2P connected to my
Fujitsu Lifebook laptop. Voltages on Stamp Pins 1,2, & 3 are -2.6, -
5.5, and -5.5. (So much for an invalid level!) Scoped the ATN pin
(3 on the stamp) during Identify and observed 4 positive pulses of
approx 20 ms duration each. I then isolated DTR from the PC to the
Stamp ATN and got exactly the same indication you have indicated,
loopback - yes, echo - yes, but nothing else. It appears that DTR to
the ATN pin on your stamp has a problem. Using my DVM the -5.5 does
raise to about -4.6 during the pulses but if you have a scope then
you can verify DTR coming into the Stamp pulses to a positive value.
Good luck, Hal
--- In basicstamps@yahoogroups.com, Dennis Landwehr <djlandwehr@y...>
wrote:
> Hi Hal,
>
> Thanks for responding. This Rogue 'Stamp Stick 2SX' calls for a DC
input
> from 6 to 18 volts, derated at higher voltages because the on-board
> regulator gets hot...my non-contact IR thermometer saw over 200
degrees F
> while I was running the original, working one off the 17V my 12V
nominal
> wall wart puts out. So I put a 7806 off-board to dissipate the
heat, and
> wound up with 5.88V or so, just below the 6V spec, on the Vin pin,
which
> is regulated down to 4.95V with an on-board reg. I have,
naturally, tried
> bypassing the 7806 temporarily, and running the thing off a 9V
battery,
> and neither gets the comms going or changes the 4.95V coming from
the
> on-board reg.
>
> I wondered too about my PCs ports or some damage there but since my
two
> PCs communicate with each other through a null-modem cable, and a
serial
> mouse works on the same port, I feel it unlikely that there's a
problem
> there. Also, on the Compaq running BS editor 1.33 (Win 98) the
loopback
> and echo tests are passed at the start of the Identify routine, and
I've
> established that the various characters of the BeXPI phrase that
gets sent
> and echoed must be 'heard' by the PC, even at the -3V level, since
if
> there is no stamp connected it never gets past the "B".
>
> It's a frustrating puzzle. I'm still wondering how to find out
exactly
> how the Identify function works; just what characters are normally
sent
> and recieved to identify the stamp out there. I think the BeXPI
might be
> just the start of a longer sequence that is being aborted for some
reason.
>
> --- Hal ALbach <halbach@f...> wrote:
> > I'm wondering why you are applying 6 volts to the stamp unless it
is
> > to the Vin pin for it's own on board regulator (if your version
has
> > one). Direct input to Vdd per the manual is 4.5 to 5.5 Volts.
Also
> > I think -3 volt RS232 signal is very close to invalid. Sounds
like
> > maybe your soldering event damaged the original "stick" which may
> > have damaged your PC port. If you can, try to do a complete
external
> > loopback test on your PC Comm port to insure that ALL pins are
> > functioning properly.
> >
> > --- In basicstamps@yahoogroups.com, "djlandwehr"
<djlandwehr@y...>
> > wrote:
> > > Hi. I'm new to the group so forgive me if this has been
covered, or
> > > please refer me to earlier posts my searches missed.
> > >
> > > I bought a "Stamp Stick 2SX" from Rogue Robotics based on the
> > > PArallax Stamp 2SX, on a 30-pin SIM type PC Bpard w/proto
space.
> > All
> > > was fine, many programming iterations until my hamhanded
soldering
> > > finally messed something up and it no longer communicated.
> > >
> > > I got another, and now a third, and neither of them has ever
> > > been "identified" by my Compaq 1245 win 98 running BS Editor
1.33
> > > (same as had worked on stick #1). I have connected only DC
power
> > > (through a 7806 regulator for +6Vdc normally, also from a 9v
> > battery
> > > or 12V nominal (17V actual) dc wall wart for tests), and the 4
> > > straight through comm lines (Sin, Sout, ATN (reset), and Ground
to
> > DB-
> > > 9 pins 2,3,4,&5 as Rouge specifies (and worked earlier).
> > >
> > > I have also tried Stamp2sx.com in a DOS window and on an older
> > > 486sx33 laptop I resurrected for the purpose. I made another
DB9
> > > with clip leads connected to pin 2 & 5 (input * ground) so I
> > > can "listen" to the serial characters sent to & from the PC and
> > > stamp. During the V1.33 'Identify' routine the PC sends, and
the
> > > Stamp Echos (both at 9600 baud) the characters B,e,X,P & I
> > (commas ,
> > > ampersand & spaces added) and the identify window
says "Loopback
> > Yes,
> > > Echo Yes, but no device type or version.
> > >
> > > The RS232 voltages are nominally OK (-3, -7, -7 or so for Sin,
> > Sout,
> > > and ATN, rising during 'identify')
> > >
> > > I've tried all I can think of to no avail. Again, this is the
> > > second, maybe third stamp stick affected. I've tried changing
> > > stamps, software, computers (and the two computers were able to
> > > communicate serially with each other, so the ports seem OK).
Any
> > > help would be appreciated.
> > >
> > > DJlandwehr
> >
> >
> > 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/
> >
> >
>
>
> __________________________________________________
> Do you Yahoo!?
> Yahoo! Platinum - Watch CBS' NCAA March Madness, live on your
desktop!
> http://platinum.yahoo.com