TWI - NRFX_CHECK(NRFX_TWIM_ENABLED) always undefined

[thomas.l]

Alright, I'm starting to question my sanity on this one. I am currently trying to use the TWIM driver nrfx_twim.c to access a TWI device. As usual, I did the checks for the required defines in the sdk_config.h and thought I had them wired up correctly.

Yet, when I open the nrfx_twim.c everything starting with line 43 (#if NRFX_CHECK(NRFX_TWIM_ENABLED) is greyed out. Alright, this somehow goes back to apply_old_config.h where I can see that it can't be defined since TWI_ENABLED is undefined. Back to sdk_config.h .. but now .. TWI_ENABLED is set to 1. Ahem .. so now what? In fact all of them are actually correctly defined but Segger won't show me and when I call nrfx_twim_init from my main.c file (I have included #include "nrfx_twim.h" as well) I get an undefined reference to nrfx_twim_init (because it's not defined).

Any idea how I can debug that issue - why is TWI_ENABLED not defined when I compile the module nrfx_twim.c.

The framework version is v16 and the device is a nrf82840 based ublox module.

[thomas.l]

Alright .. I found something. Apparently I need to define TWI0_ENABLED and TWI0_USE_EASY_DMA ...

I do now get a new error: multiple definition of `SPIM0_SPIS0_TWIM0_TWIS0_SPI0_TWI0_IRQHandler'. Let's see where that is coming from ...

[Kenneth]

I expect it is a variant of this:

https://devzone.nordicsemi.com/f/nordic-q-a/49201/uarte-configuration-with-hal-library-multiple-definition-uarte0_uart0_irqhandler/195998#195998 

[thomas.l]

The reason was that you can't use two components at the same time that share the same base address (UART and UARTE do, as well as TWI0 and SPI0 and some others as well). That should be explicitly outlined somewhere although I understand that the same base address should be hint enough.