Switching between i2c and spi on the same pins while in runtime

[georgebenett]

Hello, 

is it possible to switch between i2c and spi in the same pins in runtime? 

I'm trying to evaluate a sensor where it can communicate over spi or i2c on the same connector, is it possible to switch between the protocols while using the same pins? 

From what I've read in the documentation it looks like we can make a dynamic board configuration or manipulate the pincontrol files, or maybe using an overlay, how do I do this properly? 

I'm using nrf SDK v2.2.0 and nordic 52840. 

[Øivind]

Hi,

To accomplish this you can use the nrfx drivers directly instead of the zephyr drivers for i2c and spi. With the nrfx drivers you can uninit one peripheral then init the other with the same pins to switch between them. Both peripherals should be disabled in the devicetree, for example using an overlay file.

We have samples here for using the nrfx drivers directly: https://github.com/zephyrproject-rtos/hal_nordic/tree/master/nrfx/samples/src

These samples can also be found in the SDK at v2.2.0/modules/hal/nordic/nrfx/samples/src.