In SX Microcontrollers, SX/B Compiler and SX-Key Tool, robotworkshop wrote:

Glad to hear that you were able to get everything sorted out.  Everyone makes mistakes sometimes and it is easy to overlook things.  The SX28 is a pretty robust little chip and I know that one survived an accidental connection to 12V for a short time.

To confirm that the SX28 chip if fine do you have another one that you can substitute in your circuit or can you move it back to the SX28 Tech board to see if the debug is still grayed out?

Also, you mentioned you have both the Serial and USB SX-key.  Have you tried both?  If you are using the USB version of the SX-Key do you have the latest software?  It is posted on the Parallax site along with the USB SX-Key.  My USB Key acted weird until I updated the software.

Those options are usually grayed out when you leave a resonator connected in your circuit.  The resonator can be left in place for programming but must be removed for debugging.  Since you aren't using a resonator (at least from the schematic) I doubt that is the problem.

For me the debug the Serial version of the SX-Key is usually more forgiving.  For that you'll need to supply 5V from your circuit to power the SX-key.

Robert

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