I tried twice to implement my own overlay but I gave up because I had a 
significant lack of knowledge at this point.

Finally i used cape-universala (in which pwm works fine) and enabled uart2 
and uart4 pins by using config-pin.
Now it works! (hope nothing else has broken!)

Thank you very much!


one last question:
pins enabled using config-pin command are enabled until reboot.

how can i keep these pins after reboot?


On Monday, November 7, 2016 at 11:19:47 PM UTC+2, Charles Steinkuehler 
wrote:
>
> On 11/7/2016 2:38 PM, Theodosis Ntegiannakis wrote: 
> > 
> > On Monday, November 7, 2016 at 3:29:07 PM UTC+2, Charles Steinkuehler 
> wrote: 
> > 
> >     You have to set the pins to the proper pinmux values for UART and 
> PWM, 
> >     not just load the overlay. 
> > 
> > How do you suggest i should enable all the pins needed? 
> > If i try to enable BB-PWM0,1,2 overlays pwm still doesn't work from 
> > Adafruit_BBIO library... 
>
> Use the universal overlay.  I created it specifically because it is 
> difficult or impossible to load several of the individual overlays for 
> various functions (like PWM and UART) because they conflict. 
>
> ...or craft your own custom overlay with exactly what you want, but 
> that is a fairly high barrier to entry for most users.  The universal 
> overlay allows selecting specific pin functions on a per-pin basis, 
> while enabling most of the commonly used special hardware features. 
>
> -- 
> Charles Steinkuehler 
> [email protected] <javascript:> 
>

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