Where to put APP_TIMER_DEF without error or warning?

[tyler]

I am working on a project in Nordic SDK 8.1 that requires using a timer. I am confused where I need to define the timer though (using APP_TIMER_DEF). If I put it right after my #include statements I get the following error: ../../../main.c:39:1: warning: data definition has no type or storage class [enabled by default] APP_TIMER_DEF(m_slave_timeout_id);

I Googled the error and it said I need to place it in a function so there is somewhere for the data to be saved. Because of this I tried putting it at the top of my main() function. When I do that I get the following error though: main.c:(.text.startup.main+0x6): undefined reference to `APP_TIMER_DEF'

Where should I put this code?

[Jim]

I do not know if my answer will help you, but I used it like this:

int You_want_function(void) { APP_TIMER_DEF(m_timer_id); app_timer_create(&m_timer_id, APP_TIMER_MODE_SINGLE_SHOT,timeout_handler); app_timer_start(m_timer_id, APP_TIMER_TICKS(5000, APP_TIMER_PRESCALER), NULL); }

You can start as above in the some function you want to use.

[MartinBL]

Are you using the app_timer library from SDK 8.1 too? I can't find that macro in that version of the library. The correct way to do it there would be to declare static app_timer_id_t m_battery_timer_id; somewhere at the top of main.c (as it is done in e.g. the ble_app_hrs example).

[tyler]

Ok thanks!