====== 04 Better Practises ======

Some **general** guidelines we found useful working with state machines:

  * Do not put "real code" inside the state machine, instead trigger a MHL-case
  * Public requests should always go through the MHL
    * Exception: When no data is needed for an action, public requests could directly request a transition from the EHL
  * Public requests should always go through the state machine
    * Exception: When they don't trigger some action, e.g. only ask the module for its status, read some values from the shift register etc.
  * All data needed is held in the shift register of the MHL

=== Transitions ===

  * Place transitions where events occur - don’t go through MHL or EHL “just because”
  * Transitions should not be triggered from within the state machine itself
  * Transitions can be called via public requests if the SM module is designed that way
  * Use the variant input of ''SM Request Transition.vi'' only for error information