the timer is 6 times faster

[msquizzato]

I updated a working project based on nRF52832_xxAA 32Mhz crystal, from nRF5 SDK 14.2.0 to nRF5 SDK 16.0.0

now the timer is 6 times faster,
the code hasn't changed
is there any setting i miss?

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const nrf_drv_timer_t TIMER_SYS = NRF_DRV_TIMER_INSTANCE(1);

#define TIMER_PERIOD 10 /**< Timer period. System timer will expire every 10 ms */

void TIMER_Init(void)

{

uint32_t time_ticks;

uint32_t err_code = NRF_SUCCESS;

//Configure TIMER for 10ms interval

nrf_drv_timer_config_t timer_cfg = NRF_DRV_TIMER_DEFAULT_CONFIG;

err_code = nrf_drv_timer_init(&TIMER_SYS, &timer_cfg, timer_sys_event_handler);

APP_ERROR_CHECK(err_code);

time_ticks = nrf_drv_timer_ms_to_ticks(&TIMER_SYS, TIMER_PERIOD);

nrf_drv_timer_extended_compare(

&TIMER_SYS, NRF_TIMER_CC_CHANNEL0, time_ticks, NRF_TIMER_SHORT_COMPARE0_CLEAR_MASK, true);

nrf_drv_timer_enable(&TIMER_SYS);

}

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const nrf_drv_timer_t TIMER_SYS = NRF_DRV_TIMER_INSTANCE(1);
#define TIMER_PERIOD      10         /**< Timer period. System timer will expire every 10 ms */

void TIMER_Init(void)
{
    uint32_t time_ticks;
    uint32_t err_code = NRF_SUCCESS;

    //Configure TIMER for 10ms interval
    nrf_drv_timer_config_t timer_cfg = NRF_DRV_TIMER_DEFAULT_CONFIG;
    err_code = nrf_drv_timer_init(&TIMER_SYS, &timer_cfg, timer_sys_event_handler);
    APP_ERROR_CHECK(err_code);
    time_ticks = nrf_drv_timer_ms_to_ticks(&TIMER_SYS, TIMER_PERIOD);
    nrf_drv_timer_extended_compare(
         &TIMER_SYS, NRF_TIMER_CC_CHANNEL0, time_ticks, NRF_TIMER_SHORT_COMPARE0_CLEAR_MASK, true);
	nrf_drv_timer_enable(&TIMER_SYS);
}

[Edvin]

Are you sure you are seeing 6 times the speed, and not 8 or 4? The reason I ask is because it sounds like a prescaler setting. Check out the example in SDK\examples\peripheral\timer.

My guess is that during your porting, you have missed some sdk_config.h definitions or something.

Try to debug nrf_drv_timer_init() and see if the number of ticks set is correct, and if it is not, why it is not set correctly.

BR,

Edvin

[msquizzato]

I use default (16 MHz)

nrf_drv_timer_config_t timer_cfg = NRF_DRV_TIMER_DEFAULT_CONFIG;
err_code = nrf_drv_timer_init(&TIMER_SYS, &timer_cfg, timer_sys_event_handler);

the strange thing is that if set TIMER_PERIOD to 1ms OK  2ms OK,  > 2ms the time is wrong

time_ticks = nrf_drv_timer_ms_to_ticks(&TIMER_SYS, TIMER_PERIOD);
nrf_drv_timer_extended_compare(
&TIMER_SYS, NRF_TIMER_CC_CHANNEL0, time_ticks, NRF_TIMER_SHORT_COMPARE0_CLEAR_MASK, true);
nrf_drv_timer_enable(&TIMER_SYS);

What could it be?

I would need it at 10ms but for this problem I set it at 2ms

[Edvin]

what does nrf_drv_timer_ms_to_ticks() return when you set 1, 2 and >2? E.g. 3 or 10?