NRF5340 I2C Pins

RE: NRF5340 I2C Pins

Jared — Mon, 28 Mar 2022 10:42:04 GMT

Hi,

Can you double check with the logical analyzer that the nRF5340 sends out the same address in both cases? NRFX_ERROR_DRV_TWI_ERR_ANACK is returned by slave if it doesn't acknowledge the address.

regards

Jared

RE: NRF5340 I2C Pins

DorianN — Mon, 28 Mar 2022 08:13:39 GMT

Okay guys sorry about the no communication on the I2C pins, I can get the address sent message from the board.

Apparently it's the module that is not replying back?

On the console I am getting the following:

i2c_nrfx_twim: Error 0x0BAE0001 occurred for message 0

and after some looking around the error is associated with:

NRFX_ERROR_DRV_TWI_ERR_ANACK    = (NRFX_ERROR_DRIVERS_BASE_NUM + 1),

from the following nordic file:

nrfx_errors.h

But then again I do not understand why it's functioning properly on the other 2 pins.

Is the sample only supposed to work on pins 34-35?

But then again there's the overlay file which overrides the pin settings.

RE: NRF5340 I2C Pins

DorianN — Mon, 28 Mar 2022 08:01:02 GMT

Hi Jared,

Thanks for the reply.

Yeah I hooked up a logic analyzer but I see no activity on the lines SDA/SCL.

I also implemented a simple blinky on the 2 pins and they switch (High/Low) without any issues.

Regards,

Dorjan

RE: NRF5340 I2C Pins

Jared — Fri, 25 Mar 2022 12:09:14 GMT

Hi,

Yes, every GPIO should be available to be assigned for the TWIM peripheral. Do you see any activity on the SCL line if you use a logical analyzer or a oscilloscope?

regards

Jared