You have not mentioned which kernel you're using. On Tue, Jul 26, 2016 at 9:34 AM, <[email protected]> wrote:
> Hello Guys, > > I am trying to control the PWM Output over a C++ program. However I cannot > get it to work. It seems like I am unable to activate the PWM output. > > Here is what I already tried: > I loaded the following capes: > 0: PF---- -1 > 1: PF---- -1 > 2: PF---- -1 > 3: PF---- -1 > 4: P-O-L- 0 Override Board Name,00A0,Override Manuf,BB-UART1 > 5: P-O-L- 1 Override Board Name,00A0,Override Manuf,BB-UART5 > 6: P-O-L- 2 Override Board Name,00A0,Override Manuf,am33xx_pwm > 8: P-O-L- 4 Override Board Name,00A0,Override Manuf,BB-PWM0 > 9: P-O-L- 5 Override Board Name,00A0,Override Manuf,BB-PWM1 > 10: P-O-L- 6 Override Board Name,00A0,Override Manuf,BB-PWM2 > After that several pwmchip<number> directories appear in /sys/class/pwm. > All of those contain a export file which I can use to create pwm0 and in > some pwmchip's also a pwm1 directory. > Inside these pwm[01] subfolders are files for duty_cycle, period and > similar but writing duty_cycle=5000, period=10000 and enable=1 into them > does not cause any output to occur. > A run file like in some other tutorials does not exist in our case. > > I also tried to follow the instructions of the Derek Molloy book, and > different guides in this google groups forum. However none of these seem to > apply to my kernel. > > What am I missing? It seems like the outputs are not activated, or > something similiar? Does anybody know how to get the PWMs to work, and how > to interface them correctly? > > > Best Regards, > Phil > > > > -- > For more options, visit http://beagleboard.org/discuss > --- > You received this message because you are subscribed to the Google Groups > "BeagleBoard" group. > To unsubscribe from this group and stop receiving emails from it, send an > email to [email protected]. > To view this discussion on the web visit > https://groups.google.com/d/msgid/beagleboard/25541a5f-3b5c-4a5d-92fe-3b70bfd8cb48%40googlegroups.com > <https://groups.google.com/d/msgid/beagleboard/25541a5f-3b5c-4a5d-92fe-3b70bfd8cb48%40googlegroups.com?utm_medium=email&utm_source=footer> > . > For more options, visit https://groups.google.com/d/optout. > -- For more options, visit http://beagleboard.org/discuss --- You received this message because you are subscribed to the Google Groups "BeagleBoard" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To view this discussion on the web visit https://groups.google.com/d/msgid/beagleboard/CALHSORpeKWqxAx1ce9ouR%3DJKt94gLSNwzMEp%2Bk7v1HDa3RE4sw%40mail.gmail.com. For more options, visit https://groups.google.com/d/optout.
