How to use I2C on the nRF5340 DK ?

RE: How to use I2C on the nRF5340 DK ?

Simon — Tue, 26 Oct 2021 13:14:08 GMT

I'm happy to help 🙂

RE: How to use I2C on the nRF5340 DK ?

GunnerDx — Tue, 26 Oct 2021 06:54:00 GMT

Thank you so much for explaining everything

RE: How to use I2C on the nRF5340 DK ?

Simon — Mon, 25 Oct 2021 18:02:39 GMT

You configure the hardware through the overlay file.

If you're using the secure board, modify nrf5340dk_nrf5340_cpuapp.overlay

If yo're using the nonsecure board, modify nrf5340dk_nrf5340_cpuappns.overlay (it should be nrf5340dk_nrf5340_cpuapp_ns.overlay in NCS v1.7.0, but I think it will get renamed automatically).

I can see that you got a different advice in the ticket nRF5340 I2C pins, but that is the approach for the nRF5 SDK (and in NCS if you're using the NRFX drivers directly). The nRF5340 is only compatible with the nRF Connect SDK (NCS), which is the one you're using now.

Configuring hardware in NCS is always done through the device tree (.overlay, .dts, .dtsi.. files). Read more about the Device Tree here: https://developer.nordicsemi.com/nRF_Connect_SDK/doc/latest/zephyr/guides/dts/index.html

Best regards,

Simon

RE: How to use I2C on the nRF5340 DK ?

GunnerDx — Mon, 25 Oct 2021 14:53:59 GMT

Thank you. In the I2C scanner example you provided I can see that the device_get_binding works well for the I2C which is something I was struggling with. However, I would like to be able to change the pins of the SCL and SDA signals. Do you have an idea on how to achieve that ?

Thank you in advance.

RE: How to use I2C on the nRF5340 DK ?

Simon — Mon, 25 Oct 2021 14:14:32 GMT

TWI is the same as I2C, but there are legal reasons for not using that name.

You could start with the I2C scanner sample, created by a colleague of mine. It should work with the nRF5340

Check out the answer below, where I explained how to use a peripheral, like I2C:

https://devzone.nordicsemi.com/support-private/support/263222#permalink=629762

If you don't get the provided sample to work, or are still confused, please let me know

Best regards,

Simon