Which Linux image is this ? IS this a Wheezy, or Jesse ? On Fri, Mar 25, 2016 at 10:58 AM, William Hermans <yyrk...@gmail.com> wrote:
> *1. The directory tree in /sys/class/uio is empty, software loading >> firmware into PRU* >> > *exits with SEGFAULT:* > > > That is the real hint. The uio pru driver module is not loaded. So any > attempts to use said files or directory structure is going to fail . . . > > I'd have to say that something is wrong with you device tree file, but I'm > not that good with pinmuxing in dts file so . . . I can not say one way or > another. You seem to be using the correct kernel though for using the uio > PRU driver. *bone* > > On Fri, Mar 25, 2016 at 9:46 AM, Sylwester <de.retrospekt...@gmail.com> > wrote: > >> >> What am I trying to achieve? >> ============================ >> >> 1. Toggle P9_27 via PRU as an "hello world" example. >> 2. Get uio_pruss up and running, making /sys/class/uio/ not empty anymore >> 3. Getting "exploringBB/chp13/signalTest" working. >> >> What is my current setup? >> ========================= >> >> Linux beaglebone 4.1.20-bone-rt-r20 #1 Sat Mar 19 06:28:47 UTC 2016 >> armv7l GNU/Linux >> >> >> 1. Beagle Bone Black with latest Image (Debian 8.3) running from SD-Card >> 2. eMMC and HDMI Disabled via* dtb=am335x-boneblack-overlay.dtb* in >> /boot/uEnv.txt on SD >> 3. The bb.org-overlays set up and Installed. >> 4. Set up DTS file to initialize PRUSS and Pin P9_27 in Mode 5, as Output >> for PRU >> DTS File here: >> https://github.com/DatanoiseTV/BBB-PRU/blob/master/overlay/DatanoiseTV-001.dts >> 0x1a4 0xd was previously 0x1a4 0x5, but this didn't work as well. >> >> What are the current problems? >> ============================== >> 1. The directory tree in /sys/class/uio is empty, software loading >> firmware into PRU >> exits with SEGFAULT: >> >> open("/dev/uio0", O_RDWR|O_SYNC) = -1 ENOENT (No such file or >> directory) >> >> open("/sys/class/uio/uio0/maps/map0/addr", O_RDONLY) = -1 ENOENT (No such >> file or directory) >> >> --- SIGSEGV {si_signo=SIGSEGV, si_code=SEGV_MAPERR, si_addr=0xd00} --- >> >> +++ killed by SIGSEGV +++ >> >> Segmentation fault >> >> >> 2. GPIO direction and state apparently not initialized correcty. >> >> >> >> -- >> 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. >> > > -- 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.
