Ways to drive nrf52840 Port0 Pin 9 (P0.9 NFC) as GPIO?

RE: Ways to drive nrf52840 Port0 Pin 9 (P0.9 NFC) as GPIO?

cjh39 — Fri, 28 Mar 2025 17:33:28 GMT

This does not work..

Im using a nrf52840 , Segger with the nrf SDK.

How do I use the NFC pins as GPIO ? There must be a simple solution to this.

Ive added #define CONFIG_NFCT_PINS_AS_GPIOS 1 to the sdk_config.h and also I added the CONFIG_NFCT_PINS_AS_GPIOS here

When I check the nrfjprog --memrd 0x10001000 --n 512, Im getting all F's

RE: Ways to drive nrf52840 Port0 Pin 9 (P0.9 NFC) as GPIO?

Simonr — Mon, 09 Dec 2019 07:43:45 GMT

NFC can be disabled and GPIOs enabled by defining the CONFIG_NFCT_PINS_AS_GPIOS variable in the project settings. How you do this depends on what IDE you're using.

If you're using SEGGER Embedded Studios, go to Project>Edit Options>Cod>Preprocessor>Preprocessor Definitions and add the CONFIG_NFCT_PINS_AS_GPIOS variable.
If you're using Keil µvision, go to Project>Options for Target> C/C++>Preprocessor Symbols>Define and add the CONFIG_NFCT_PINS_AS_GPIOS variable.

You can also check out these instructions for a more in-depth explanation.

Best regards,

Simon

RE: Ways to drive nrf52840 Port0 Pin 9 (P0.9 NFC) as GPIO?

amore — Mon, 09 Dec 2019 07:04:46 GMT

This issues has been solved by using CONFIG_NFCT_PINS_AS_GPIOS=y. Thank you