Configuring P09/NFC1 and P10/NFC2 as Digital input

[rshankle]

Hi,

Sorry for the seemingly simple question.  I'm using the nRF52832 chip and I have a 4xdip switch connected to P26, P27, P09/NFC1 and P10/NFC2.   I can successfully read the state of P26 and P27 when configured as GPIO digital input.

Unfortunately I am only reading 0's from P09 and P10.  I'm wondering if I need to do additional configuration for these two inputs since they are part of the NFC feature (which I'm not using.)

Is any one else using these inputs and can share some initialization code?

thanks,

Bob

[Simonr]

Hi Bob

You are correct, there is some additional settings to be aware of when configuring the NFC pins as GPIOs. This depends on the IDE you are using. If using Keil μvision, please refer to this post. If using SEGGER Embedded Studio this picture should explain how to configure your NFC pins as GPIOs: 

If you are using another IDE, please specify which one and I will find out how to do this in that one.

Best regards,

Simon

[rshankle]

Worked like a champ!

thanks

Bob

[Cory Klopotic]

Thank you so much!  Was trying to use those two pins as an output and thought it was something with my custom board.  Took me a bit to figure out it was related to the NFC.