nrf51822 - app_timer - getting compile errors?

[Mahonroy]

Hello, I duplicated the project example "nrf51-micro-esb-master" under "proprietary_rf" and got it up and running. I now need to incorporate some timer functionality.

I followed this tutorial on the app_timer: devzone.nordicsemi.com/.../

However, I get these error messages, and I don't understand why?

compiling nrf_drv_clock.c...
compiling app_util_platform.c...
compiling app_timer.c...
linking...
.\_build\tiny_esb_ptx.axf: Error: L6218E: Undefined symbol app_error_handler_bare (referred from app_timer.o).
.\_build\tiny_esb_ptx.axf: Error: L6218E: Undefined symbol nrf_nvic_state (referred from app_util_platform.o).
Not enough information to list image symbols.
Finished: 1 information, 0 warning and 2 error messages.
".\_build\tiny_esb_ptx.axf" - 2 Error(s), 3 Warning(s).
Target not created.
Build Time Elapsed:  00:00:01

Any help/advice would be greatly appreciated, thanks!

[Roger Clark]

You can't be compiling all the necessary source files

Make sure you have

SDK_V12.2.0\components\libraries\util\app_error.c and SDK_V12.2.0\components\libraries\util\app_util_platform.c

in your project (or Makefile)

[Mahonroy]

I followed the instructions of the tutorial exactly, and that included adding the app_util_platform.c source file. Are there any other files that it didn't mention that I might need to add?