P0.12 not working with I2C

RE: P0.12 not working with I2C

Jared — Wed, 21 Jul 2021 07:41:18 GMT

Hi,

Pin 12 i.e. P0.10 is marked as an NFC pin on the nRF52832, Pin 15 i.e. P0.12 is marked as a GPIO.

The nRF52810 doesn't have an NFC peripheral.

Either way, emulating the nRF52810 on the nRF52 DK by using the PCA10040e examples will disable the NFC option which will hinder any possible pin conflicts with the NFC.

regards

Jared

RE: P0.12 not working with I2C

TS Gowtham — Tue, 20 Jul 2021 15:09:49 GMT

Hey Jared,

I don't have an example for the nRF52 DK, I'll try to whip one up ASAP. But wouldn't this issue be expected on the nRF52 DK since P0.12 would be a NFC pin?

Thanks

RE: P0.12 not working with I2C

Jared — Fri, 16 Jul 2021 09:13:28 GMT

Hi,

P0.12 is marked as a general GPIO on the nRF52810 which you are still using, correct?

[quote user=""]

I've also noticed the same issue on a nrf52 DK while using a pca10040e project.

[/quote]

Could you upload an example that reproduces this on the nRF52 DK /PCA10040e

regards

Jared

RE: P0.12 not working with I2C

TS Gowtham — Thu, 15 Jul 2021 14:28:46 GMT

Hi Jared,

The code did not hit the hardfault handler. The pin was changed to P0.09 and TWI was working as expected.

IIRC, P0.12 was a NFC pin in the nrf52832. Could that be related to this issue somehow?

Thanks

RE: P0.12 not working with I2C

Jared — Thu, 15 Jul 2021 13:47:18 GMT

Hi,

[quote user=""]On the nRF52810, is there any limitation on using P0.12 with I2C[/quote]

No, there shouldn't be any issues with using pin 12 on the nRF52810. Have you checked that the application doesn't go into the error handler? What happens if you change the pin?

regards

Jared