Linking error with TWI and BLE example

Question

Hi all,

i am trying to merge ble_app_peripheral example with twi_scanner. So i created twi_ad7147.h and twi_ad7147.c with the twi configurations.

But i am getting this error when linking

linking...
.\_build\nrf52832_xxaa.axf: Error: L6218E: Undefined symbol nrf_drv_twi_init (referred from twi_ad7147.o).
.\_build\nrf52832_xxaa.axf: Error: L6218E: Undefined symbol nrfx_twim_enable (referred from twi_ad7147.o).
.\_build\nrf52832_xxaa.axf: Error: L6218E: Undefined symbol nrfx_twim_rx (referred from twi_ad7147.o).
.\_build\nrf52832_xxaa.axf: Error: L6218E: Undefined symbol nrfx_twim_tx (referred from twi_ad7147.o).
Not enough information to list image symbols.
Not enough information to list load addresses in the image map.
Finished: 2 information, 0 warning and 4 error messages.
".\_build\nrf52832_xxaa.axf" - 4 Error(s), 5 Warning(s).
Target not created.
Build Time Elapsed:  00:00:03

I am including these files in the main, a

#include "nrf_twi.h"
#include "nrf_twim.h"
#include "nrf_drv_twi.h"

Also my sdk_config.h is like:

// <e> NRFX_TWI_ENABLED - nrfx_twi - TWI peripheral driver
//==========================================================
#ifndef NRFX_TWI_ENABLED
#define NRFX_TWI_ENABLED 1
#endif
// <q> NRFX_TWI0_ENABLED  - Enable TWI0 instance
 

#ifndef NRFX_TWI0_ENABLED
#define NRFX_TWI0_ENABLED 1
#endif

// <q> NRFX_TWI1_ENABLED  - Enable TWI1 instance
 

#ifndef NRFX_TWI1_ENABLED
#define NRFX_TWI1_ENABLED 0
#endif

#ifndef NRFX_TWI_DEFAULT_CONFIG_IRQ_PRIORITY
#define NRFX_TWI_DEFAULT_CONFIG_IRQ_PRIORITY 6
#endif

// <e> NRFX_TWI_CONFIG_LOG_ENABLED - Enables logging in the module.
//==========================================================
#ifndef NRFX_TWI_CONFIG_LOG_ENABLED
#define NRFX_TWI_CONFIG_LOG_ENABLED 0
#endif
// <o> NRFX_TWI_CONFIG_LOG_LEVEL  - Default Severity level
 
// <0=> Off 
// <1=> Error 
// <2=> Warning 
// <3=> Info 
// <4=> Debug 

#ifndef NRFX_TWI_CONFIG_LOG_LEVEL
#define NRFX_TWI_CONFIG_LOG_LEVEL 3
#endif

// <e> NRFX_UARTE_ENABLED - nrfx_uarte - UARTE peripheral driver
//==========================================================
#ifndef NRFX_UARTE_ENABLED
#define NRFX_UARTE_ENABLED 1
#endif
// <o> NRFX_UARTE0_ENABLED - Enable UARTE0 instance 
#ifndef NRFX_UARTE0_ENABLED
#define NRFX_UARTE0_ENABLED 0
#endif

// <q> NRF_TWI_SENSOR_ENABLED  - nrf_twi_sensor - nRF TWI Sensor module
 

#ifndef NRF_TWI_SENSOR_ENABLED
#define NRF_TWI_SENSOR_ENABLED 0
#endif

// <q> NRF_TWI_MNGR_ENABLED  - nrf_twi_mngr - TWI transaction manager
 

#ifndef NRF_TWI_MNGR_ENABLED
#define NRF_TWI_MNGR_ENABLED 0
#endif

// <e> NRFX_TWIM_ENABLED - nrfx_twim - TWIM peripheral driver
//==========================================================
#ifndef NRFX_TWIM_ENABLED
#define NRFX_TWIM_ENABLED 1
#endif
// <q> NRFX_TWIM0_ENABLED  - Enable TWIM0 instance
 

#ifndef NRFX_TWIM0_ENABLED
#define NRFX_TWIM0_ENABLED 1
#endif

// <q> NRFX_TWIM1_ENABLED  - Enable TWIM1 instance
 

#ifndef NRFX_TWIM1_ENABLED
#define NRFX_TWIM1_ENABLED 0
#endif

// <o> NRFX_TWIM_DEFAULT_CONFIG_FREQUENCY  - Frequency
 
// <26738688=> 100k 
// <67108864=> 250k 
// <104857600=> 400k 

#ifndef NRFX_TWIM_DEFAULT_CONFIG_FREQUENCY
#define NRFX_TWIM_DEFAULT_CONFIG_FREQUENCY 26738688
#endif

// <q> NRFX_TWIM_DEFAULT_CONFIG_HOLD_BUS_UNINIT  - Enables bus holding after uninit
 

#ifndef NRFX_TWIM_DEFAULT_CONFIG_HOLD_BUS_UNINIT
#define NRFX_TWIM_DEFAULT_CONFIG_HOLD_BUS_UNINIT 0
#endif

Any help please?

Alanarf · Accepted Answer

Solved by adding the source files nrfx_twi.c and nrfx_twim.c manually to /Driver group in Keil. 
 I had added nrf_drv_twi.c only into the /Driver group. 
 Curiously, adding the path containing the files was not enough to make the linker recognize it.

Linking error with TWI and BLE example

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