Undefine reference to "app_timer_start"

[lsvw1217]

Hi,

I faced a problem while building my project. Please see screenshot below

I think I have already include all the files and everything compiled. But this error shows up at the very end. Please advise. 

Thank you.

[RSA]

Did you include app_timer.h in main.c?you should also include the .h in user includes! for some files, you also need to include the .c file in the project directory tree (i get a similar error when my app_timer.c isn't in the file tree) If you're using the template project all this should already be set up.

[AndreasF]

Hi.

Have you also enabled the app timer in sdk_config.h?

Best regards,

Andreas

[lsvw1217]

Hi guys,

Thank you for the speedy reply. I've included the app_timer.h and app_timer.c. 

After I enabled the app timer in sdk_config.h, I did it by change from "APP_TIMER_ENABLED 0" to "APP_TIMER_ENABLED 1". Is this the correct way to do it?

If this is the correct way, after I enable the app timer, I got another error shown in the attach picture. 

Is this something to do with settings in sdk_config again?

Thank you for helping again.

[AndreasF]

Hi.

Which SDK are you using? Have you done any modificatiosn?

Have not seen SWIAPP_TIMER_CONFIG_SWI_NUMBER_EGUAPP_TIMER_CONFIG_SWI_NUMBER_IRQn before.

Best regards,

Andreas

[lsvw1217]

Hi Andreas,

I was using the newest SDK "nRF5_SDK_15.3.0_59ac345".

I made a modification and that is adding "nrfx_power_clock.c" from previous SDK since it wasn't included in the newest SDK.

I got the "nrfx_power_clock.c" from "nRF_SDK_15.2.0_9412b96" so I also try using this SDK but the same error showed up.

Please advise. Thank you!