PX4/Firmware — pull request #73 by LorenzMeier (2012-11-26 16:47:15+00:00)
Title: Made sure IO and FMU obey the lockdown flag when arming motors

The lockdown flag is used to induce a lowest-level output blocking. The rationale is that good simulations need to simulate an armed system. Only on the very last API call the servo arming should be denied in HIL mode. Previously the PWM outputs of FMU and IO failed to properly lock down the actuators in HIL mode.