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

I had to ask about the schematic since people often have all sorts of configurations and many are hand wired on a breadboard.  Since you are using one of the prebuilt protoboards that answers a lot about your setup.  I have to question the use of 4700 ohm resistors for the LED's and I assume that was a typo and you probably meant 470 ohm resistors instead.

A couple things come to mind regarding the debug issue.  That is usually grayed out when ever the resonator is left in the circuit.  If you are using a resonator it must be pulled out for debugging to work.  For programming and normal operation it can be left in place.  Are you using a 4Mhz resonator?  If so are you leaving the SX-key plugged in after programming?  Another question is if you are using the older Serial version of the SX-Key or the newer USB version.

I went back and searched the SX forum and found some threads talking about I2C which may help:

http://forums.parallax.com/forums/default.aspx?f=7&m=333732

http://forums.parallax.com/forums/default.aspx?f=7&m=312895

http://forums.parallax.com/forums/default.aspx?f=7&m=269425

http://forums.parallax.com/forums/default.aspx?f=7&m=236034

http://forums.parallax.com/forums/default.aspx?f=7&m=252244

The SX/B code changed a bit with newer versions of the compiler.  Depending upon what version you're using that may be a factor.

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