I2C liaison

[Josselin_11]

I am looking for a good document to establish an I2C connection between the nRF5340 and another microcontroller. I am using VS Code and the Nordic SDK. Unfortunately, the tutorials and documentation from Nordic are terribly bad. Can you help me?

[Jared]

Hi,

Did you see our I2C lesson in the fundamental course on Devacademy? It's pretty extensive and show how to setup a I2C transfer.

Is there anything specific that you did not understand or want elaboration on?

regards

Jared 

[Josselin_11]

Hi,

Yes I did.
One of my first problem is the following one, here under.

On my main.c I put this code :
#include <zephyr/kernel.h>

#include <zephyr/drivers/i2c.h>

#define I2C0_NODE DT_NODELABEL(i2c0)

int main(void)

{

    static const struct i2c_dt_spec dev_i2c = I2C_DT_SPEC_GET_ON_I2C(I2C0_NODE);

        return 0;

}

 

On my prj.conf, this :

CONFIG_I2C=y

And on my .overlay file, I put this :
i2c0: i2c0@03 {

    label ="MSP"

    reg = < 0x03 >;

};

I don't want to appear rought, but in my opinion, I find that these lessons are kind of poor and poorly explained.

Regards

[Josselin_11]

So I have an error on the underline function with the message : "expected an expressionC/C++(29)".

[Jared]

Hi,

That doesn't look quite correct. Can you share your overlay file and share the whole error log,

regards

Jared