hal_ready — indicates that this component is ready
hal_ready ( int comp_id )
A HAL component identifier returned by an earlier call to hal_init.
hal_ready indicates that this component is ready (has created all its pins,
parameters, and functions).
This must be called in any realtime HAL component before its rtapi_app_init exits, and in any userspace component before it enters its main loop.
Returns a HAL status code.