The parachute we are using provides an own IMU and can trigger itself when certain conditions are met. This is meant as an additional redundancy in case the flight controller fails entirels. It fires when roll/pitch limits are exceeded, or free fall is detected.
When the chute fires, however, we would like the Pixhawk to go intro flight termination mode. This is to prevent to motors from spinning and avoid them cutting through the parachute lines.
We realize that if the flight controller has failed entirely, this will not work because it will no longer be able to go into flight termination mode. However, in case the chute fires and Pixhawk has not failed entiely, it is still crucial to kill the motors.
Our parachute can provide either a PWM high/low signal to determine whether it has fired, or a constant DC high/low. Is it possible to configure the Pixhawk in a way that it enters flight termination mode on one of those triggers (PWM high or DC high)?