Enabling SPI and TWI drivers on Zephyr

Question

Hi

First the fundamentals, I am using:

nRF52840-DK
nRF Connect for VS Code: v2024.7.13

I am trying to create a demonstration project, where I need both SPI and TXI/I2C.

Here is a copy of the essentials:

prj.conf:

CONFIG_EVENTS=y
CONFIG_SETTINGS=y
CONFIG_HEAP_MEM_POOL_SIZE=1024
CONFIG_DK_LIBRARY=y
CONFIG_LOG=y

CONFIG_SPI=y
CONFIG_I2C=y

#CONFIG_NRFX_SPIM1=y
#CONFIG_NRFX_TWI0=y

nrf52840dk_nrf52840.overlay:

&spi1 {
    status = "okay";
    compatible = "nordic,nrf-spim";
    pinctrl-0 = <&spi1_default>;    
};
&i2c0 {
    status = "okay";
    compatible = "nordic,nrf-twim";
    pinctrl-0 = <&i2c0_default>;    
};

twi code:

#include <zephyr/kernel.h>
#include <zephyr/drivers/gpio.h>
#include <zephyr/drivers/i2c.h>
#include <nrfx_twim.h>

#define TWIM_INST_IDX 0

static nrfx_twim_t twim_inst = NRFX_TWIM_INSTANCE(TWIM_INST_IDX);
// Comile error: 'NRFX_TWIM0_INST_IDX' undeclared here (not in a function)

spi code:

#include <zephyr/kernel.h>
#include <zephyr/drivers/spi.h>
#include <nrfx_spim.h>

#define SPIM_INST_IDX 1

static nrfx_spim_t spim_inst = NRFX_SPIM_INSTANCE(SPIM_INST_IDX);
// compile error: 'NRFX_SPIM1_INST_IDX' undeclared here (not in a function)

In my first attempts with only SPI interface enabled, I got it working by using the CONFIG_NRFX_SPIM1=y line in the prj.conf file. But I do not thick that it was the right way.

What do I miss? Do I need more includes? Or some other changes to the project?

I have tried to look at the examples, e.g. "nrfx_spim basic non-blocking example.", here only the CONFIG_NRFX_SPI1=y is used, but the error detector in the editor expects an error (just As in my application), but it does compile:

CONFIG_NRFX_SPIM1 was assigned the value y, but got the value n. Missing dependencies: n
SPIM1 driver instance
Type: bool
Value: n

Thanks in advance.

Kasper