How to control PWM using VOXL2 IO expander ?

winnie.tsai

Hi
I use voxl2 board to connect voxl2 io expander board at J19.
I would like to control PWM signal by "qshell pwm" command first. How to do it ?

I use below command to do it, but there is no any PWM signal change.

qshell px4io detect
After this command, PWM output 50Hz signal
qshell px4io start
qshell mixer load /dev/px4io quad_x_io.main.mix
qshell pwm rate -c 1234 -r 400
I try the -c <pwm_ouput>, there is no any PWM signal change.

winnie.tsai

@winnie-tsai
I can change the frequency by the qshell command

qshell pwm -a -r <rate>

another, I would like to know how to change the PWM duty cycle.

Thanks