No console output from examples/aio_read on Zephyr 1.5.0/master with Arduino 101

[alext-mkrs]

Disclaimer: I may be missing something simple here or this could be a Zephyr version-related problem as I wasn't able to make ARC core display any output using Zephyr's samples/hello_world from 1.5.0 either (but I was able to do that on master). But let's see if you spot something.

Just the normal compilation/upload sequence (output.txt), connected to my [proven working] Serial-to-USB connected to Arduino's pins 0 and 1 using screen /dev/ttyUSB0 115200 command. Tried BOARD=arduino_101_sss_factory as well (though AFAIU in 1.5.0 it's sort of legacy).

No output on the console whatsoever. Quark core runs samples/stub or samples/hello_world.

Any ideas why this could be happening? Have you run this one on 1.5.0 successfully?

[malikabhi05]

this is strange. I have been having problems with master rather than 1.5.0. Specifically, if i flash something/anything on the quark core, I get no output on the arc core (using master). Everything seems to work fine with 1.5 for me though. @pylbert has seen a similar problem.

[jontrulson]

I've been using 1.5 and haven't seen any issues in this regard. One thing I do is build and flash hello world on both the ARC and quark cores. Then on boot, see both core emit their Hello worlds. I do not proceed until that works.

Then, build/flash whatever you need on the appropriate core, leaving the hello world on the other core. So far this has worked flawlessly for me.

I have not tried any other version than 1.5.

[alext-mkrs]

That's interesting, because that's exactly what I did at the very beginning of those tests and for a while. On 1.5.0 the ARC output doesn't get through for me, I only see Quark's "Hello World! x86". Having a pure stub on Quark (empty main) shows nothing at all. On master I can see both outputs (messed up, there's an open Jira item for that), or just one of them if one of the cores runs a stub.

Okay, thanks for sharing your experiences, I think I'll do one more round of juggling the samples and take this to Zephyr team via their Jira as this indeed looks more like an OS-level thing.

[malikabhi05]

@alext-mkrs could you please point me to the open JIRA item for this issue.

[alext-mkrs]

Sure, I'll post it here when submitted - might need to wait until the next weekend as I haven't had a chance to do one more systematic tryout and that would be helpful for submission.