Timer with prescaling

[Jean-marie]

I use sdk 15.3.0 / nrf52832 / SD_132.

How to use the prescaler of a timer for an event every 24 hours ?

An example will be very explicit.

Best regards,  Jiemde

[Jean-marie]

Hi Karl, Thanks for fast reply.

I'm not yet "comfortable" with sdk.config, so for the "BITMODES", I suppose you speak about:

// <o> TIMER_DEFAULT_CONFIG_MODE - Timer mode or operation

// <0=> Timer
// <1=> Counter

#ifndef TIMER_DEFAULT_CONFIG_MODE
#define TIMER_DEFAULT_CONFIG_MODE 0
#endif

// <o> TIMER_DEFAULT_CONFIG_BIT_WIDTH - Timer counter bit width

// <0=> 16 bit
// <1=> 8 bit
// <2=> 24 bit
// <3=> 32 bit

#ifndef TIMER_DEFAULT_CONFIG_BIT_WIDTH
#define TIMER_DEFAULT_CONFIG_BIT_WIDTH 3
#endif

Question: where can I set the timer prescaler ?

Is there an example for references ?

Best regards

Jiemde

[Karl Ylvisaker]

Hello Jiemde,

Jean-marie said:

I'm not yet "comfortable" with sdk.config

I completely understand, no problem at all.

Have you seen the TIMER API Reference? Particularly, bit_width is set during initialization - see the input parameters to the nrfx_timer_init function.
I think this is what you are looking for, rather than the sdk_config.h. The lines you are referring to in the sdk_config is the DEFAULT_CONFIG parameters.

Is this what you were looking for?
Please let me know if you should have more questions or encounter any other issues! :)

Best regards,
Karl