On 9/7/2016 1:02 PM, Kirk wrote: > > What is the recommended way to access NON PRU GPIO pins? > > I'm asking because I'm working with a custom cape board on the Beaglebone > Black > that has already been built. > And I'm trying to move some time critical code to the PRU. > I don't think all the GPIO pins that are used are in the group of PRU GPIO > pins.
IMHO it works best if you setup the GPIO banks with Linux, then use the PRU to twiddle the output bits using the set and clear registers in the GPIO bank. That way you don't have to worry about any sort of locking to insure consistent updates. Note the Linux side also needs to use the set/clear registers for output updates (and not a read-modify-write sequence) to insure no updates get lost. -- Charles Steinkuehler char...@steinkuehler.net -- 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/a43516b8-e0f1-d8f0-8850-505077dc9689%40steinkuehler.net. For more options, visit https://groups.google.com/d/optout.
