tomp

Thanks Igor, I built preempt model 4 ok and booted it on OPi+2e but my RT app does not think the result is really an RT kernel the hint is from uname -a... Linux orangepiplus2e 3.4.113-rt143-sun8i #2 SMP PREEMPT Thu May 18 08:04:38 ICT 2017 armv7l GNU/Linux it does not say "PREEMPT RT" so apps wont work ( and many linuxes are PREEMPT out of the box ) I was able to load and run 'cyclictest' from https://www.kernel.org/pub/linux/utils/rt-tests/ but the jitter was way too high (500 to 2500uS) on the few tests i tried (https://rt.wiki.kernel.org/index.php/Cyclictest) So, I dont have very tight timing bounds. I'd like to get 200uS, but its not christmas today ;-) Thanks for your help, the fix is beyond my skills. I will watch for news though, its a great little board. TomP

Hello Christos & Igor Pecovnik, Thanks very much for all this great work! I am very NOOB to building kernels I wanted RT kernel to use with linuxcnc, specifically linuxcnc's 'hal' system Before building, I repaired 2 patch files that are missing 0x0a at end of file ( they produce err saying the file ends in middle of line, actually meaning at EOF ) friendlyarm_m1_gigabit.patch ( ends in 0x3a) ov5640-enhanced-device-with-vfe-drc-table-fix.patch (ends in 0x29) I repair by simply opening in nano and immediately saving. This action adds 1 0x0a byte to each file, and changes the timestamp. But, changing the timestamp creates another problem, the compile reports that it cannot update due to the change. I chose to continue Is this correct to add the missing 0x0a? Can I ignore the errors about ending in middle of line? I am trying to make preempt model 5, Christos said "Did a fresh OrangePi Plus2E image, legacy, Debian jessie, desktop, RT, but the SD boot gives this" Which preempt model did you succeed with? regards tomp