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

The TX UART is not used by that project but could be used by another so I left it in place.  You'll notice that each section of the ISR is very modular and can be pulled out if you desire.

Since you're using a PDB, put a 10K pull-up on RA.1 and use open-true baud mode.  And you only need to update the device when required -- the servo updates are handled internally, so refreshing more frequently that 20 milliseconds doesn't do anything for you.  To use the controller as it's designed you'll need a byte for the digital outputs and an eight byte array for the servos; you should be able to send the values like this:

[code]
  PAUSE 1
  SEROUT Sio, Baud, [digOuts, STR servos\8]
[/code]

The initial pause ensures the device has seen the proper break between packets and can re-arm to receive the next.

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