How quick from power-on to PWM signals?

Hi, I have a project where I’m driving ESCs that need to be initialized with a specific PWM signal (1500 us at roughly 50Hz) w/in 1.5 seconds from power on. Is this possible with the Beaglebone Blue?



Depending on which Beaglexxxx distribution, and what things you have ripped out of them, they can take anywhere from 12 seconds to multiple minutes to boot.
So, either you need to create a very special custom uBoot to initialize your ESC’s, or add a power switch, that is under user software control, that is not turned on until after the system has booted, and you can then initialize the ESC’s within your alloted time, after turning on the power switch.

— Graham

Graham, thanks for the reply.