Hey everyone I'm still stuck as to why my beaglebone keeps changing the 
polarity to 1 on boot.  I can go in and manually change it but it always 
resets after reboot.  Should I maybe write a start up script to force the 
polarity to 0?  I'd rather find the root cause rather than a hack but at 
this point anything that works is fine by me.

Thank you

On Saturday, March 19, 2016 at 11:30:58 PM UTC-7, M House wrote:
>
> I'm doing a project right now that involves using a micro servo.  One is 
> on port P8_13 and another on P9_14.  
>
> Everytime I boot the beaglebone it gives me - error: Error enabling PWM 
> controls: Error: ENOENT, no such file or directory 
> '/sys/devices/ocp.3/bs_pwm_test_P9_14.15/polarity'
>
> When I check this file it shows a value of '1' inside of it.  Where the 
> same file for P8_13 shows a zero.  When I change the P9_14 polarity file to 
> 0 the servo works as intended.  I'm really confused why the polarity is 
> being set to 1 every time I boot the beaglebone.  This also happens if I 
> move the servo to P9_16.
>
> I did just upgrade from Debian 7.8 to 7.9 but I don't see how that would 
> change the GPIO behavior.
>
>

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