Unable to access PWM from userspace on BBB

i have problem of to find period folder



I’m not really an expert, but the information I’ve picked up from reading various post is that not all kernels have full PWM support. Are you on Ubuntu?

If your are missing period and duty then it is possible the Kernel was compiled without the flag CONFIG_EHRPWM_TEST.

I’m not sure about the fix, but I think you might need to recompile and uncomment the CONFIG_EHRPWM_TEST defconfig.

there are some clues in the posts above.

good luck,