Improve support for Zephyr RTOS applications

[kartben]

The zephyr-esp32 builder is already a great start in allowing to run Zephyr apps from Wokwi. It would be great to look into generalizing/improving support by allowing the users to configure things such as:

• providing a prj.conf
• providing DT overlays
• supporting more than just basic esp32, but also potentially rp2040, esp32-s2, etc.

I am around to chat more around this, and I will provide help as much as I can!

[urish]

Seems like it crashes when pressing the button

Does it only crash on the S3? Or also in C3?

[urish]

A quick workaround is to disable bouncing on the button by setting the "bounce" attribute to "0":

    {
      "type": "wokwi-pushbutton",
      "id": "btn1",
      "top": 140.6,
      "left": 48,
      "attrs": { "color": "green", "bounce": "0" }
    }

Looks like with bouncing, the button is stress-testing the interrupt mechanism :)

[urish]

Wow, this was a super tricky one - another subtle bug in interrupt handling, this time in Xtensa. Pushed a fix, so we should now play nicely even with a bouncy button that generates tons of interrupts in quick succession.

[kartben]

Wow, this was a super tricky one - another subtle bug in interrupt handling, this time in Xtensa. Pushed a fix, so we should now play nicely even with a bouncy button that generates tons of interrupts in quick succession.

Nice, thanks! I will give it a try and let you know. Hopefully this will unlock rotary encoders too! Didn't realize that the simulated button would be bouncy tho?

[urish]

Didn't realize that the simulated button would be bouncy tho?

Sure, we don't want folks to think their code is working just to run it on real hardware and figure out they didn't account for bouncing, right?

https://docs.wokwi.com/parts/wokwi-pushbutton#bouncing

[kartben]

Didn't realize that the simulated button would be bouncy tho?

Sure, we don't want folks to think their code is working just to run it on real hardware and figure out they didn't account for bouncing, right?

https://docs.wokwi.com/parts/wokwi-pushbutton#bouncing

Neat!

[kartben]

FWIW the encoder works like a charm too now! https://github.com/kartben/wokwi-zephyr-projects/tree/master/esp32s3-lvgl-with-encoder Note that it's not using ESP's Pulse Counter (PCNT) IP but instead plain GPIO. PCNT might not even be supported anyway, according to the wiki at least?

[urish]

Yes, no PCNT yet

[kartben]

@urish A nice one that basically worked out of the box 🥳 https://github.com/kartben/wokwi-zephyr-projects/tree/master/esp32c3-artificial-nose TinyML with Edge Impulse FTW.

Actually, come to think of it, not everything worked out of the box, it would crash when I tried to use a screen rotation that's not 0 or 180 degrees. Not sure if that's a bug? (here's the relevant code on the Zephyr side https://github.com/zephyrproject-rtos/zephyr/blob/433a85e7bf32ffc77ba194bb903bcca84c44c047/drivers/display/display_ili9xxx.c#L244)

[urish]

TinyML with Edge Impulse FTW.

Cool, I wanted to try Edge Impulse for a long time

It would crash when I tried to use a screen rotation that's not 0 or 180 degrees

Crash is in display garbage or actually the program would crash?

[kartben]

The latter. I will try to upload a bin as I realize it might be hard for you to test otherwise.

[urish]

elf please