Could I stop and restart a timer in this timer timeout handler?

[cgha]

In timeout handler, I need to reload a new value, could this be fail since the timer stop is delayed by SWI0.

[Susheel Nuguru]

Yes you can. Verified on SDK8.1 S110 I have tried this below code on S110 with connection established to master control panel

static app_timer_id_t                   m_test_timer_id;
#define GPIO_NUM		6
#define TEST_INTERVAL1     APP_TIMER_TICKS(5, APP_TIMER_PRESCALER)
#define TEST_INTERVAL2     APP_TIMER_TICKS(10, APP_TIMER_PRESCALER)

static void test_timeout_handler(void * p_context)
{
	static bool is_true = true;
	nrf_gpio_pin_toggle(GPIO_NUM);
	uint32_t err_code;
	
	if(is_true)
	{
		err_code = app_timer_stop(m_test_timer_id);
		APP_ERROR_CHECK(err_code);
		err_code = app_timer_start(m_test_timer_id, TEST_INTERVAL1, NULL);
		APP_ERROR_CHECK(err_code);
	}
	else
	{
		err_code = app_timer_stop(m_test_timer_id);
		APP_ERROR_CHECK(err_code);
		err_code = app_timer_start(m_test_timer_id, TEST_INTERVAL2, NULL);
		APP_ERROR_CHECK(err_code);
	}
	is_true = !is_true;
}

and I got the timer value changed correctly (with 0.04ms error because of handler execution time).Attaching is logic analyzer output for togle GPIO pin inside the handler

[Susheel Nuguru]

cgha, please update this thread, if this answer helped you then please click the ✓ to the left of the answer so that others can come and look here.