Can''t Communicate. Help.
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Posts: 46,084
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
>
>
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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/
>
>
__________________________________________________
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Yahoo! Platinum - Watch CBS' NCAA March Madness, live on your desktop!
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