I am writing a custom airframe and mixer. (see http://discuss.px4.io/t/adding-new-airframe-to-px4-and-qgc/)
When i make changes to the mixer, I perform
make px4fmu_v2-default
and reupload the binary in QGC using custom firmware option. I find that I always need to rerun the entire sensor calibration process (even though the hardware didnt change). After calibration, QGC allows me to arm and fly.
I can see the mixer files in Pixhawk (via onboard files dialog in QGC), Can I edit them directly?
Ziyang