Possibly dead board?
hextic
Posts: 4
I recently received a Propeller proto board for Christmas. At first it worked fine, and then for some bizarre reason only one IO pin would work at a time (Example: turning on one pin would turn on all the output pins), and then the board stopped being recognized by Propeller tool at all. What recourse do I have? I think I got a bad board, but there are items soldered onto the board so I'm not sure how this all works. (RMA, not the board. xP)
Comments
Power shorts usually cause issues with the Propeller Tool seeing it.
(Is the LED lit?)
Could you have tied the I/O together somewhere?
If you've got a camera handy, post a couple pics and let the experts
have a look. (the real EE's here. [noparse]:)[/noparse] It might be a simple circuit issue.
OBC
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Got an SD card connected? - PropDOS
Yes, the green LED turns on fine. Uploading some images, of the top and bottom of the board.
Post Edited (hextic) : 12/27/2008 7:34:46 AM GMT
your code runs down ONE time and then it's finished.
As the board is not working properly. I recommend to do very basic tests.
1.) Measuring the current flowing through the board.
2.) DISconnect everything from the camera.
Connect a 220 ohm-resistors to an IO-PIN and an LED to the resistor and ground.
Load a small program that let this IO-PIN blink.
The pictures are not sharp enough to see in detail how the soldering is done.
As far as I can see it. The solderplum is formed like a ball. This happens when
the solderingtime is too short. You should keep the solderiron in good contact
to the PCB AND the wire until the solderplum flows down and forms a
"cone". But still as short as possible until this happends. 2-3 seconds.
if you need more help just post again here
best regards
Stefan