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

Are you referring to the May 2007 issue? (#117 is actually a display multiplexer)

If you're talking about the latest project it does not use the AppMod protocol -- I took a page from the DMX and LANC protocols that use a "rest" period between packets to create a sync point.  In the Animatronic Controller project the device will wait until there has been no activity on the RX line for at least two byte periods (~502 uS at 38.4K baud).  After that it is "armed" and waits for nine bytes: the first byte being the digital control outputs (RC port) and the next eight being the servo position values expressed in ~10 uS units (close to the BS1).

I suspect you didn't actually build the board but dropped the code into an SX28 on your PDB -- no problem, that's where I started.  If you're connecting between the Stamp and the A/C's RX pin (RA.1), then you need to use open baud mode and have a 10K pull-up on that line.

Since I built the board to run from a PC I used the PDBs extra serial port for testing.  My PDB prototype was tested using the VB program that I supplied with the project.  I've also run the board with a neat little program called Vixen (www.vixenlights.com) -- I'll talk about that in the next issue.

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