P0.09 and P0.10 on nRF52810

[Adriana]

Hi,

I'm developing on nrf52810 using the SDK14.1.0 and I've take as starting point a template application that targets nRF52810 running on the nRF52 Development Kit. But I'm working on nrf52810 hardware, NOT the nrf52DK, so I've made preprocessor and startup files adjustments as indicated in documentation.

I want to use P0.09 as digital output and I've read many questions about using this pins as GPIO instead of NFC. I understand the issue when using nrf52DK and default settings in SDK, but nrf52810 has no support for NFC so I think this pins should be default configured as GPIO.

For testing I'm generating a clock signal which is properly driven through pins P0.28, P0.30 and P0.12.

What's missing?

Thanks!

[MartinBL]

1. What is the problem? You can't get the clock signal to work on P0.09?
2. What documentation are you referring to? There are preprocessor and startup files for the nRF52810 included in SDK 14.x.

[Adriana]

1. Yes that's the problem, I forgot to mention it.
2. I know and I'm using them. I refer to the SDK -> UserGuide -> Developing for nRF52810 wich explains how to develop for the nRF52810 SoC on the PCA10040 board, which uses nRF52832. When transferring to nRF52810 hardware you modify some preprocessor defines as remove DEVELOP_IN_NRF52832

[MartinBL]

Hi,

The NFC pins on the nRF52 are actually physically disconnected from the header pins (P0.09 and P0.10) along the sides of the kit.

You need to desolder R25 and R26 and short R27 and R28 to disconnect the NFC contact and connect P0.09 and P0.10 to the nRF52.

[Adriana]

Thank you for the drawings they are very clear, but I already know that. As I said in my question, I'm NOT using nrf52DK, I'm using a module based on nrf52810 SoC.

[MartinBL]

My apologies, I forgot about that.

Anyway. I did a quick test of pin 9 and 10 on an nRF52810 myself. I based my test on the SDK_14.1.0\examples\peripheral\uart\pca10040e example. I removed all the UART stuff and simply toggled pin 9 and 10 in 1 second intervals. It seems to work fine. No special porting was required. Can you try this hex file that works on my kit? nrf52810_xxaa_nfc_toggle_test.hex

How are you generating your clock signal? Are you using GPIOTE and PPI for example? Can you upload a hex file or code that I can try?