Can’t remap SPI0 on PCA10040

[piotrosiotr]

I want to remap SPI0 pins from default (P26, P27, P28) to another ones (P08, P09, P10) on PCA10040 under nRF Connect SDK. But I stuck into a problem: SPI module seems to work fine, because CS pin works as expected, but SCK (P10) and MOSI (P08) not work at all. But on default pins everything works fine. I try to launch a simple custom example just to check it works so SPI0 and a few GPIOs are configured in my code. Could you tell me, maybe some peripherals like nfc etc are configured by default? In documentation I didn’t find anything special about this pins.

[helsing]

Hi Piotr,

maybe some peripherals like nfc etc are configured by default?

Yes. Try adding this line to you prj.conf file:

CONFIG_NFCT_PINS_AS_GPIOS=y

That should make P0.09 and P0.10 available.

As for pin P0.08, this one is used for UART connection to the interface/debug IC on the DK. If you cut open solder bridge SB25 you should be able to get access to this GPIO. Check out the back of the DK to see a drawing of the solder bridges or the hardware drawings of nRF52 DK.