anchor.diff:  ====
   
   (u32 input) index-pin
  +[indent=4]
   ====
   PRU direct input pin to use for the index (Z) signal
   ====
  
positive.code: ====
  
  (u32 input) A-pin
  ====
  PRU direct input pin to use for the A signal
  ====
  
negative.code: ====
  
  (u32 input) pin
  [indent=4]
  ====
  I/O pin to use for the pwm output
  ====
  