Pin Numbers on the nRF5340-QKAA

RE: Pin Numbers on the nRF5340-QKAA

Andreas — Thu, 01 Oct 2020 10:32:29 GMT

Hi,

Sorry for confusing answer previously, happy to hear that I managed to make myself understood in the end. 🙂

Best regards,

Andreas

RE: Pin Numbers on the nRF5340-QKAA

Learner — Thu, 01 Oct 2020 08:15:55 GMT

Thank you Andreas.

This is a much clearer answer. I don't think I've seen this mentioned anywhere in the documentation. Is it?

Your earlier answer (shown below) was unclearer hence my follow-up questions.

"This number is just the GPIO number, e.g. if you have SCK on P0.13, the you just write <13>."

We got there at the end. 😉

Kind regards

RE: Pin Numbers on the nRF5340-QKAA

Andreas — Thu, 01 Oct 2020 08:04:03 GMT

Hi,

Assume SCK is on Px.y, then you shall enter sck-pin = <32*x+y> in the dts file. For P1.13 this is sck-pin=32*1+13 = 45.

Best regards,

Andreas

RE: Pin Numbers on the nRF5340-QKAA

Learner — Thu, 01 Oct 2020 07:41:57 GMT

But in the .dts file we do not mention which port the pin is on. We just put a number for the pin.

If I did not misunderstand, you said if the sck is on P0.13 just put sck-pin = <13> in the .dts file.

Extrapolating this I would then, if sck is on P1.13 just put sck-pin = <13> in the .dts file.

So, how the Device Tree be able to distinguish between pin 13 on P0 and pin 13 on P1?

Please clarify your answer.

Thank you.

Kind regards

Mohamed

RE: Pin Numbers on the nRF5340-QKAA

Andreas — Thu, 01 Oct 2020 06:16:01 GMT

Hi,

P1.13 is another way of writing P0.(32+13), just write 45 or respective number in the overlay file.

Best regards,

Andreas

RE: Pin Numbers on the nRF5340-QKAA

Learner — Tue, 29 Sep 2020 14:13:31 GMT

Thank you Andreas,

Hmm! How does the build environment distinguish whether we meant to say P0.13 or P1.13?

Kind regards

Mohamed

RE: Pin Numbers on the nRF5340-QKAA

Andreas — Tue, 29 Sep 2020 13:01:12 GMT

Hi,

This number is just the GPIO number, e.g. if you have SCK on P0.13, the you just write <13>. You can read more about this in our nRF Connect SDK tutorial.

Best regards,

Andreas

RE: Pin Numbers on the nRF5340-QKAA

Learner — Tue, 29 Sep 2020 10:16:33 GMT

Thank you Andreas.

Unfortunately, unless I am missing something, my answer remains unanswered. The two links you sent still show pins labelled as L1, C1 etc... but I need a real number. I expected the pins to be numbered in a continuous manner from 1,2,3,... to 98 or whatever the number of pins on the chip. This is in order to be able to use them in the .dts file e.g.

&spi2 {
compatible = "nordic,nrf-spim";
status = "okay";
sck-pin = <13>;
miso-pin = <40>;
mosi-pin = <9>;
};

Looking forward to your answer.

Mohamed

RE: Pin Numbers on the nRF5340-QKAA

Andreas — Tue, 29 Sep 2020 09:24:52 GMT

Hi,

See the pin assignments section in the PS.

You can also find this through the reference layout.

Best regards,

Andreas