Hello,
I have a following issue with BBB PWM. It seems to be fully operational from software point but I observe no voltage on voltmeter. It shows like 0,11 V and no changes at all when I change duty.
On BBB I have installed recent Arch Linux and did following:
echo am33xx_pwm > /sys/devices/bone_capemgr.8/slots
echo bone_pwm_P8_13 > /sys/devices/bone_capemgr.8/slots
echo 0 > export
after I got following files:
ls /sys/class/pwm/pwm0
device duty_ns period_ns polarity power run subsystem uevent
and applied
echo 1000000 > period_ns
echo 250000 > duty_ns
echo 1 > run
and got 0,11V, changing duty_ns has l can’t get even more them 1V. But I expected 3,3V with period 1000000 and duty 100000.
[root@alarm pwm0]# cat /sys/kernel/debug/pwm
platform/48304100.ecap, 1 PWM device
pwm-0 ((null) ):
platform/48304200.ehrpwm, 2 PWM devices
pwm-0 ((null) ):
pwm-1 ((null) ):
platform/48302200.ehrpwm, 2 PWM devices
pwm-0 ((null) ):
pwm-1 ((null) ):
platform/48300100.ecap, 1 PWM device
pwm-0 ((null) ):
What could be the issue?
Thank you.