Communication issues (not with girlfriend) BS2 serial
I designed a board set up for serial communications with a BS2. I followed the diagram from the Basic Stamp syntax and reference manual that I have attached a photo of as well as the schematic of the serial comms layout I am using. To me, the layout is identical. The problem is that when I power up the·BS2 and connect my serial cable, the stamp stalls. Whatever outputs are high drop out and nothing happens. I am unable to identify the BS2 from the Stamp Editor. Anyone out there have any tricks or ideas??
Thanks for your help,
Rob
Thanks for your help,
Rob
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Vin to Vss =
Vcc/Vdd to Vss =
Rst to Vss =
Sin to Vss =
Sout to Vss =
Dave
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Dave Andreae
Parallax Tech Support·
Vcc/Vdd to Vss = 4.989 VDC
Rst to Vss = 4.987 VDC
Sin to Vss = .285 VDC
Sout to Vss = .404 VDC
Power supply schematic to follow. Thanks for looking!
Dave
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Dave Andreae
Parallax Tech Support·
Can you show us the orientation of the diodes in the bridge?
Or, it may be just as easy to pull the diodes and put a DC supply or batteries on the input to the regulator and try the circuit that way.
Cheers,
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Tom Sisk
http://www.siskconsult.com
·
Vin to Vss = 5.2v
Vcc/Vdd to Vss = 4.8
Rst to Vss = 4.8
Sin to Vss = 0
Sout to Vss =0
this is taken while in normal operation Not trying to program.
I have tried shorting the cap on the ATN line, and about everything I can think of, any input will help
Dave
Regards,
Dave
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Dave Andreae
Parallax Tech Support·
Regards,
Dave
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Dave Andreae
Parallax Tech Support·
I've laid the board out 2 times the second time cutting trace length and widening traces
Does the reset need tied low or high during programing?
what esle is there,
I have traces exactly as show,
I'm using Ceramic caps do I need to change to Tant's or something,
Is there someone I can call and talk to for a few minutes,
guys I have 4 different products coming out with stamps in them while volume is low were still talking a total of over 200 stamps lcd's pwmpal's
If I can't figure this out I'm switching to another product.
Regards,
Dave
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Dave Andreae
Parallax Tech Support·
My original design include 2 caps as in the design of the super carrier board. I was using the exact design that is show in the parallax documentation for the super carrier board,
I changed it to a straight through design illustrated in the Stamp manual. Page 27 of the Basic stamp programming manual 2.0
I shouldn't write messages when I'm frustrated beyond reason. but I would really like to know why the design of the Supercarrier board is wrong.
Another major anomaly is that the portable field programmer will program the boards with this design while my PC won't BUT my PC will program the Super carrier boards.
I cannot understand why there is these differences in design and why the portable programmer programs it while the PC won't When I had the differnce between the 2 programmers it really frustrated me