Hi, see http://derekmolloy.ie/beaglebone/beaglebone-gpio-programming-on-arm-embedded-linux/ for more information. There are also 2 pdfs with p9, p8 header tables for the pin muxing.
If you whant persistent pin muxing changes on the BBB you must change the device tree overlay!!!. To check if its work in general us the adb shell. An example for the p8.09: ./adb shell cd /sys/class/gpio echo 69 > export //creates gpio69 directory for the gpio access chmode 777 gpio // to get access for the apk. the apk is never running as root. cd gpio69 chmod 777 value chmode 777 direction you can change the direction and value by echo 1 > value // set gpio high echo out > direction // set gpio as output have fun, Am Dienstag, 13. Januar 2015 19:55:27 UTC+1 schrieb Polsinelli Apps: > > Hey everyone, I am part of a group of 5 students developing a platform > utilizing the BBB and a series of external buttons as controls for a sort > of trivia game for the elderly which may lack the somewhat precise motor > skills required to work off a standard tablet. We decided to build this app > as an android app. This has went relatively smoothly until now, We are > trying to figure out how to utilize the GPIO of the BBB and buttons to work > with the app. the wiring is not an issue i can make whatever pin needs to > be made what do it. its the code and more software side we are having > issues with. Can anyone aid in this? i have done some research on it thus > far and see that each of the GPIO pins we would like to use need to be > exported in the sys/class/gpio directory. but beyond this we do not have > much of an idea. > > Any help you can provide would greatly be appreciated. > > > -- 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/d/optout.
