Thee are 6 pwm channels 3 pairs use the same frequency but all can have independent duty cycles
Pick one each from different group for your application On 2/27/2018 2:19 AM, James Fitzsimons wrote: > Hi all, > > I've got pwm working both through echoing values directly to the > device files from bash, and also via my C++ program. However I can't > get two channels of a epwmss device to operate independently. e.g. If > I export both > /sys/devices/platform/ocp/48300000.epwmss/48300200.pwm/pwm/pwmchip1/pwm-1:0 > and pwm-1:1 then set a value for period and duty on either one of the > channels (pwm-1:0 or pwm-1:1), as soon as I enable that channel both > channels start. Stopping the channel stops both channels. I've even > tested starting one channel then stopping the other and both stop. > > I had read elsewhere that both channels had to use the same frequency > (period), which would work for my application, however I need to be > able to set the duty cycle and enable/disable independently. Is that > possible? > > I'm using the 4.14.20-ti-r36 kernel and have the following overlays > enabled: > > uboot_overlay_addr6=/lib/firmware/am33xx_pwm-00A0.dtbo > uboot_overlay_addr7=/lib/firmware/BB-PWM0-00A0.dtbo > > I'll go read the Technical Reference Manual now, but if someone can > shed some light on this for me it would be much appreciated! > > Cheers, > James Fitzsimons > -- > 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 beagleboard+unsubscr...@googlegroups.com > <mailto:beagleboard+unsubscr...@googlegroups.com>. > To view this discussion on the web visit > https://groups.google.com/d/msgid/beagleboard/c769153a-74e9-4ff5-9fa4-de9ef116ccc7%40googlegroups.com > <https://groups.google.com/d/msgid/beagleboard/c769153a-74e9-4ff5-9fa4-de9ef116ccc7%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 beagleboard+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/beagleboard/de80317f-2d04-0e67-688d-0a053543becf%40gmail.com. For more options, visit https://groups.google.com/d/optout.
