1.test code
the code run separately on ble-softdevice and only timer demo .test code as follow:
const nrf_drv_timer_t TIMER_LED = NRF_DRV_TIMER_INSTANCE(2);
/**
* @brief Handler for timer events.
*/
void timer_led_event_handler(nrf_timer_event_t event_type, void* p_context)
{
static uint32_t i;
uint32_t led_to_invert = ((i++) % LEDS_NUMBER);
switch (event_type)
{
case NRF_TIMER_EVENT_COMPARE0:
nrf_gpio_pin_toggle(13);;
break;
default:
//Do nothing.
break;
}
}
void init_timer(void)
{
uint32_t time_ms = 10; //Time(in miliseconds) between consecutive compare events.
uint32_t time_ticks;
uint32_t err_code = NRF_SUCCESS;
//Configure pin13 on board.
nrf_gpio_cfg_output(13);
//Configure TIMER_LED for generating simple light effect - leds on board will invert his state one after the other.
nrf_drv_timer_config_t timer_cfg = NRF_DRV_TIMER_DEFAULT_CONFIG;
err_code = nrf_drv_timer_init(&TIMER_LED, &timer_cfg, timer_led_event_handler);
APP_ERROR_CHECK(err_code);
time_ticks = nrf_drv_timer_ms_to_ticks(&TIMER_LED, time_ms);
nrf_drv_timer_extended_compare(
&TIMER_LED, NRF_TIMER_CC_CHANNEL0, time_ticks, NRF_TIMER_SHORT_COMPARE0_CLEAR_MASK, true);
nrf_drv_timer_enable(&TIMER_LED);
}
2.test data
test result as follows：
picture A,show timer2 timing jitter test on NRF5-SDK17.1 ble-softdevice
picture A
picture B ，show timer2 timing jitter test on NRF5-SDK17.1/examples/peripheral/timer demo
picture B
3.question
Why timer2 timing jitter of ble_softdevice is more large than peripheral-timer demo?
thanks!
