Problem setting & clearing specific pins

RE: Problem setting & clearing specific pins

Ashish — Thu, 03 Jan 2019 06:15:53 GMT

[quote]

I include a line of code " #define CONFIG_NFCT_PINS_AS_GPIOS" in my main project file.

[/quote]

This isn't required. Setting the FLAG in makefile should do it.

[quote]

As for the reset pin 21. I am trying to change the pin number from 21 to sth else in the system_nrf52.c file.

[/quote]

To do this, did you create a new file, named system_nrf52_1.c?

RE: Problem setting & clearing specific pins

noob_with_ucontrollers — Wed, 02 Jan 2019 21:15:08 GMT

I include a line of code " #define CONFIG_NFCT_PINS_AS_GPIOS" in my main project file. And I write a line "CFLAGS += -DCONFIG_NFCT_PINS_AS_GPIOS" in the makefile of the project to disable the use of P0.9, and 10 as nfct as suggested in devzone.nordicsemi.com/.../how-to-enable-p0-09-and-p0-10-as-gpio-pins-on-the-nrf52-instead-of-nfc-pins

As for the reset pin 21. I am trying to change the pin number from 21 to sth else in the system_nrf52.c file.

But doing this gives me this error.
I think I am doing sth wrong or missing sth out.

RE: Problem setting & clearing specific pins

RK — Wed, 02 Jan 2019 00:07:33 GMT

CONFIG_NFCT_PINS_AS_GPIOS, look into system_nrf52.c for other pre-processor options you can set including the reset one.

RE: Problem setting & clearing specific pins

noob_with_ucontrollers — Tue, 01 Jan 2019 23:50:50 GMT

Thanks a lot RK. I think this is the problem because when I redefine the UART TX pin to be P0.5 in the SDK.h , I can set and clear pin 6 at will.

However, I still could not figure out how to disable the NFC functionality of P0.9 and P0.10 and the reset functionality of P0.21. Would you have any recommendation for that?

RE: Problem setting & clearing specific pins

RK — Tue, 01 Jan 2019 00:50:56 GMT

As pointed out weekly here, P0.09 and P0.10 are NFC by default so you have to turn that off before you can use them as GPIOs. The other two pins are fine for use as GPIOs which makes me wonder if you have assigned them to SPI or UART or one of the other peripherals which means they no-longer function as GPIOs