I have to decide to use what? U-Boot PRU Options With v4.4.x-ti PRU via remoteproc can be enabled by:
uboot_overlay_pru=/lib/firmware/AM335X-PRU-RPROC-4-4-TI-00A0.dtbo With mainline (boneX) PRU via uio (doesn't work with v4.9.x-ti yet) uboot_overlay_pru=/lib/firmware/AM335X-PRU-UIO-00A0.dtbo Think that's the key point, there are many possibilities, but only one specific combination works. To find out which one it is .... makes not so much fun. Is somewhere an updated roadmap available, e.g. 1.) image to load 2.) if required, packages to load on top of that 3.) system setup ( I mean hardware, not user, network etc ) I expect many people are trying to use beaglebone for "real time" applications, I'm not the first and only one :-) Up to now I used µP and FPGA's for that kind of applications .... and I spent not so much nights on that. Thanks for help Kasimir Am Dienstag, 5. September 2017 18:55:37 UTC+2 schrieb Kasimir: > > I want to use the HDMI outputs to drive external circuit. Required toggle > rate is between 1MHz and 10MHz. > Have BB black. > uname -a > Linux beaglebone 4.4.84-ti-r120 #1 SMP Sun Aug 27 03:11:07 UTC 2017 > armv7l GNU/Linux > cat /etc/debian_version > 9.1 > So I have to use the PRU unit. > I was searching example to have a starting point. > But it sucks already with the first step. > > ll /sys/devices/bone_capemgr* > ls: cannot access '/sys/devices/bone_capemgr*': No such file or directory > > I load the image from here: > http://debian.beagleboard.org/images/bone-debian-9.1-iot-armhf-2017-08-31-4gb.img.xz > > What is my mistake? > Device tree compiler is up to date > device-tree-compiler is already the newest version (1.4.4-0rcnee3~stretch+ > 20170719). > 0 upgraded, 0 newly installed, 0 to remove and 0 not upgraded. > > Found a lot of hints to use the 3.8 kernel. Think that one is already some > years old, can't be true. > > Question: How to create the required device tree overlay, because /sys/ > devices/bone_capemgr* is not existing? > > Thanks for help > > > > > -- 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/d99cfe9c-ff74-4e89-a11b-ddebba68a189%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
