DevAcademy I2C doing weird things nRF52840 DK

RE: DevAcademy I2C doing weird things nRF52840 DK

runsiv — Tue, 10 Sep 2024 12:25:53 GMT

Glad to hear you figured out the issue. Don't hesitate to create new tickets in the future is there is any question

Regards

Runar

RE: DevAcademy I2C doing weird things nRF52840 DK

Sub7 — Tue, 10 Sep 2024 11:59:53 GMT

Thanks for the replies. I ended up solving the issue, the sensor was a knock-off and used a different address. It didn't provide the ACK, so I think that was the root cause. I'm not sure why the I2C transmissions ended up looking different from one time to the next, I would have expected it to look the same and I don't know why it would basically freeze the program (at least it appeared that way). Let's chalk it up to me not knowing what I'm doing. If I discover issues again I will create a new thread / ticket. Thank you for your help!

RE: DevAcademy I2C doing weird things nRF52840 DK

runsiv — Wed, 04 Sep 2024 06:11:18 GMT

Just a few questions to start with

Which version of NCS are you using?

Are you doing any of the exercises in the fundamentals or the intermediate course, if so which? Just so that I can try to replicate what you seeing.

[quote user=""]C) When I call i2c_write_dt from an interrupt twice (void button_pressed(... and I press the button twice), the program seems to just crash and nothing else happens, I have to hit reset and it works again. I probably made a mistake calling that from an interrupt however it's a little bit worrisome that something so trivial causes the program to stop working. Is Zephyr / nRF Connect SDK prone to crashing / hanging?[/quote]

The best would if you can provide any log of what is happening. I would also suggest checking out the link Louis posted.

[quote user=""]At this point I'm going through DevAcademy because I've never used Zephyr before so I'm trying to learn it. I'm used to working directly with the hardware so this Zephyr thing is like inserting a black box between me and the hardware, most of the time I have no idea what's going on, I really hope that will change as I get better with it.[/quote]

Talking from experience it gets better and at times it feels good to don't have to write everything from scratch each time. Zephyr is in active development and it have greatly improved since I started with it and the tools have improved.

Regards

Runar

RE: DevAcademy I2C doing weird things nRF52840 DK

nordicator_prim3 — Tue, 03 Sep 2024 16:45:50 GMT

Check out this previous ticket in regards to using i2c in an ISR context.

Zephyr does get easier as you fall deeper and deeper into the black box lol. Just be ready to have nightmares about 20 layers of MACRO expansions.