Hi, I am using C blacklib to handle some i2c and spi devices. Also I have few PWM's P9_14 and 16 let's say.
I learned the hard way that P9_14 and P9_16 are to be found in '48302200'. For P9_14 for example /sys/devices/platform/ocp/48302000.epwmss/48302200.pwm/pwm/pwmchipX which is a link from /sys/class/pwm/pwmchip3/ became available as pwm0 after echoing 0 to /sys/class/pwm/pwmchip3/export as root@beaglebone:/sys/class/pwm/pwmchip3/pwm0# pwd /sys/class/pwm/pwmchip3/pwm0 root@beaglebone:/sys/class/pwm/pwmchip3/pwm0# ls -l total 0 -rw-rw-r-- 1 root pwm 4096 Feb 22 03:14 capture -rw-rw-r-- 1 root pwm 4096 Feb 22 03:14 duty_cycle -rw-rw-r-- 1 root pwm 4096 Feb 22 03:14 enable -rw-rw-r-- 1 root pwm 4096 Feb 22 03:14 period -rw-rw-r-- 1 root pwm 4096 Feb 22 03:14 polarity drwxrwxr-x 2 root pwm 0 Feb 22 03:14 power -rw-rw-r-- 1 root pwm 4096 Feb 22 03:14 uevent root@beaglebone:/sys/class/pwm/pwmchip3/pwm0# The blacklib still doing old slot way of finding out which /sys/... files are matching for P9_14 pwm, going from symbolic links to some hardcoded PXY->1,2,3 mapping finally to find out the /sys/class/.../pwm/period.. and such... My question is: How do I determine which X,Y from /sys/class/pwm/pwmchip*X*/pwm*Y* maps to (X,Y) of a pwm pin P*X*_*Y* Thank you -- 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/d5b9c014-303d-4556-80fb-315feb1ed1c7%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
