On Wed, Feb 5, 2014 at 7:02 AM, Robert P. J. Day <rpj...@crashcourse.ca> wrote: > > in an embedded linux class i was teaching last week, the students > were all using beagle xMs (rev C), and we decided to experiment with > playing with the LEDs from user space. > > using the LED files under /sys/class/leds worked fine -- changing > the brightness, trigger and so on. but using this article as a basis: > > http://makezine.com/2009/02/03/blinking-leds-with-the-beagle-board/ > > we simply couldn't control the very same LED via gpio. we followed the > article, tried changing the LED trigger and so on, but nothing worked. > > can anyone with a BB xM (Rev C) verify whether or not that article > works for them? let me know which LED you pick, the GPIO pin number > you use, whether you need to change the trigger, etc. i'm sure i'm > missing something trivial, i'd just like to figure out what it is. > > p.s. using robert nelson's debian build here: > > https://rcn-ee.net/deb/rootfs/wheezy/debian-7.3-console-armhf-2014-01-24.tar.xz
Hey Robert, With device tree on the beagle/beagle-xm I've only enabled the i2c functionality on the expansion bus. I need to also enable spidev.. but looking at page 109: https://github.com/CircuitCo/BeagleBoard-xM-RevC/blob/master/BeagleBoard-xM_revC_SRM.pdf For the other pins, what pinmux would you want for your class? (should we enable the other uart?) Regards, -- Robert Nelson http://www.rcn-ee.com/ -- 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. For more options, visit https://groups.google.com/groups/opt_out.
