How can I re-use timers?

[Pierre Landau]

Timers are defined by a macro: APP_TIMER_DEF. This unfortunately expands to: #define APP_TIMER_DEF(timer_id)
static app_timer_t timer_id##_data = { {0} };
static const app_timer_id_t timer_id = &timer_id##_data

Suppose I have several modules that are used depending on the configuration of some GPIO bits. Each module is implemented in a separate file. However, each module uses several timers, many of which ought to be shared, since the Nordic timer implementation is somewhat RAM-hungry.

Is my best option merely to define new macros such as #APP_TIMER_DEF_PUBLIC and #APP_TIMER_DEF_EXTERN, or is there a better approach?

[Hung Bui]

Hi Pierre,

I'm not sure there is a better solution, for me it sounds right.

[Jeong Hyun Seok]

I got the same situation. APP_TIMER_DEF - which makes static variables, and we cannot use the timer in several files.

[Jeong Hyun Seok]

How about this?

1. APP_TIMER_DEF() in main.c, create timer in main.c
2. make new function which includes "app_timer_stop()" and "app_timer_start()" the timer - this function is in main.c and other files can use it (extern)