nRF52 2832 - Error L6218E: Undefined symbol

[Bilal Bouguerra]

Hello,

I'm currently trying to build my Keil project. i2c.c file in my project is using nrf_drv_twi driver functions.

So I included nrf_drv_twi.h in the file (or in the include chain) and I referenced the correct path in C/C++ Include Path option.

But I'm still stuck with the following error:

 

linking...
.\_build\nrf52832_xxaa.axf: Error: L6218E: Undefined symbol nrf_drv_twi_disable (referred from i2c.o).
.\_build\nrf52832_xxaa.axf: Error: L6218E: Undefined symbol nrf_drv_twi_enable (referred from i2c.o).
.\_build\nrf52832_xxaa.axf: Error: L6218E: Undefined symbol nrf_drv_twi_init (referred from i2c.o).
.\_build\nrf52832_xxaa.axf: Error: L6218E: Undefined symbol nrf_drv_twi_rx (referred from i2c.o).
.\_build\nrf52832_xxaa.axf: Error: L6218E: Undefined symbol nrf_drv_twi_tx (referred from i2c.o).
.\_build\nrf52832_xxaa.axf: Error: L6218E: Undefined symbol nrf_drv_twi_uninit (referred from i2c.o).

It's incomprehensible, can someone help ?

[Bastien Reynard]

Hello,

Did you add nrf_drv_twi.c in your Keil project?

This error means the linker only has the declarations of the functions but he doesn't find the definitions.

Also make sure you have enabled TWI Module in your sdk_config.h, otherwise you won't compile the twi definitions in nrf_drv_twi due to the #if NRF_MODULE_ENABLED(TWI) guard.

[Bilal Bouguerra]

I have nrf_drv_twi.c in my project but the errors still there.

What do I need to add to the sdk_config.h ?

#ifndef NRF_MODULE_ENABLED

#define NRF_MODULE_ENABLED 1

#endif

is correct ?

[Bastien Reynard]

#ifndef TWI_ENABLED
#define TWI_ENABLED 1
#endif

[Bilal Bouguerra]

I tried but the errors are still there

[Bastien Reynard]

You also need to enable the TWI0 or TWI1 instance

#ifndef TWI0_ENABLED
#define TWI0_ENABLED 1
#endif

You might want to check the sdk_config.h file in the twi example from nordic.

[Bilal Bouguerra]

Thank you it worked, I still have other errors I'm going to check why.