nrf53 device tree uart

RE: nrf53 device tree uart

Øivind — Fri, 01 Oct 2021 10:27:27 GMT

Hi again,

That's a bug I was unaware of, thanks for letting me know! Can you give me some more details, so I can reproduce it and report it internally?

Setting an unused pin to 0xFFFFFFFF is proper and should not cause such issues.

RE: nrf53 device tree uart

Corentin — Fri, 01 Oct 2021 09:26:27 GMT

Do not configure rts and cts as suggested (set unused pins to 0xFFFFFFFF, not 0.). If not used just delete rts-pin and cts-pin. If you keep for instance rts-pin=0x0xFFFFFFFF you have a hard fault when PM_DEVICE is enabled because drivers don't find gpio to this address. Delete rts-pin if not used form device trees solved the problem.

RE: nrf53 device tree uart

Corentin — Mon, 06 Sep 2021 12:11:44 GMT

Thank you.

RE: nrf53 device tree uart

Øivind — Mon, 06 Sep 2021 11:20:10 GMT

Correct. Also, set unused pins to 0xFFFFFFFF, not 0.

RE: nrf53 device tree uart

Corentin — Mon, 06 Sep 2021 10:23:23 GMT

Found answer: need to used offset

https://developer.nordicsemi.com/nRF_Connect_SDK/doc/latest/zephyr/reference/devicetree/bindings/i2c/nordic,nrf-twi.html?highlight=sda%20pin

Example:

The SDA pin to use.

For pins P0.0 through P0.31, use the pin number. For example,
to use P0.16 for SDA, set:

    sda-pin = <16>;

For pins P1.0 through P1.31, add 32 to the pin number. For
example, to use P1.2 for SDA, set:

    sda-pin = <34>;  /* 32 + 2 */