The difference between "nrfx_timer" and "nrf_drv_timer"?

[WangChengbin]

In the "sdk_config.h",there has two options, one is TIMER_ENABLED,the other is NRFX_TIMER_ENABLED, and  in the sample ,there also have"nrf_drv_time" ,what's the difference? I so confused!

[Cyril]

nrfx_* is the new way of interacting with the peripherals. It used to be through nrf_drv_*. I would advise to use nrfx_* calls for new sotftware.

If you take a look at the file nrf_drv_timer.h, you'll see that nrf_drv_* function are translated to nrfx_* functions.

NRFX_TIMER_ENABLED is mandatory if you want to have the nrfx_timer functions in the compilations units. See that line in nrfx_timer.c: 

#if NRFX_CHECK(NRFX_TIMER_ENABLED)

Best of luck

[WangChengbin]

Thanks very much! I have other question , if I want to use the "NRFX_TIMER_ENABLED",I put it as 1, when I compile,the error is tell me "the TIMER_ENABLED don't be set",so could I think: if I want to use timer ,I must choose TIMER and NRFX_TIMER ,is't right?

[Cyril]

I guess you use apply_old_config.h somewhere.
Take a look at these lines where NRFX_TIMER_ENABLED is redefined and TIMER_ENABLED is used instead:

#if defined(TIMER_ENABLED)

#undef NRFX_TIMER_ENABLED
#define NRFX_TIMER_ENABLED TIMER_ENABLED

You can either remove inclusion of apply_old_config.h or also use TIMER_ENABLED macro, set to 1