Configure P0.14 and P0.15 as SCL and SDA

[Laurent Bourassa]

Hello,

I have a project where I'm using I2C. I want to configure P0.14 and P0.15 as my I2C pins as I already made a board thinking those would be available, however I get nothing on one pin and some sort of slow clock on the other (Every other pins I have tried for testing purposes have worked fine).

I have read here that pins 14 and 15 for the nRF52832 are GPIOs but also Tracedata pins (which I'm not sure what it is). Could it be what's preventing me from using these pins as I2C pins, and if so how could I reconfigure them for my needs?

Thank you in advance.

Laurent

[Simonr]

Hi Laurent

This errata explains that the TRACEDATA pins are automatically enabled as Trace pins when in debug mode. I am guessing this is what's happening. Please check if the workaround is implemented in your project, or disable DEBUG mode.

Best regards, 

Simon

[Laurent Bourassa]

Hi Simon,

Yes, this workaround is already implemented in the project in system_nrf52.c. I tried to put it again in main.c just to make sure, but it's still the same. Also, I'm not sure how to disable debug mode : I'm downloading the Release version so debug mode should be off (?).

NDEBUG is defined in the solution preprocessor for Release.

Laurent