nRF52840 TWI library error

[adragocelestica]

Hi,

I have included in my code the code from the twi_scanner example as a starting point for using TWI in my board. When compiling, I get the following error:

../../../../../../integration/nrfx/legacy/nrf_drv_twi.h:120:37: error: 'NRF_DRV_TWI_INSTANCE_0' undeclared here (not in a function)

The error happens in the exact same  nrf_drv_twi.h used by the example, and I am not finding any way to understand what is happening. Any help would be appreciated, thank you very mucn.

Best regards,

Alin

[Jørgen Holmefjord]

I'm not able to reproduce your exact issue, but it sounds like there is some wrong configuration in your sdk_config.h file. Please make sure you have set the NRFX_TWI/TWIM and TWI_ENABLED configs similar to the example:

[adragocelestica]

the issue was in my sdk_config.h. What I did is profit from the fact that this file is written with "ifdefine", and I just copied and pasted one after the other the code from different sdk_config.h files from different examples. That way, I only modified what was missing, and now the TWI is working. I will try to do the same for SPI, hopefully it will work too.