It sounds like the line is configured to be a clock signal, perhaps it is in MODE 6 (mcasp0_aclkr_mux3)?
What dtb/overlays are you using when booting? On Tuesday, December 1, 2015 at 1:30:56 PM UTC-6, [email protected] wrote: > > After booting Debian for Beaglebone Black I looked at P9 pin 12 (GPIO 1 > 28) on an oscilloscope, their is a positive 65ms wide positive pulse that > repeats approximately every second. > > Is this pin not set up as a GPIO pin? > > I tried > > echo 60 > /sys/class/gpio/export > > > However when I tried > > ls -al /sys/class/gpio > > > after this gpio60 did not show up. > -- 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]. For more options, visit https://groups.google.com/d/optout.
