jitter_drift.c File Reference

#include <limits.h>
#include <math.h>
#include <stdlib.h>
#include <zephyr/kernel.h>
#include <zephyr/tc_util.h>
#include <zephyr/ztest.h>

Functions
	K_SEM_DEFINE (periodic_sem, 0, 1)
void	periodic_fn (struct k_timer *t)
uint64_t	periodic_diff (uint64_t later, uint64_t earlier)
double	cycles_to_us (double cycles)
	ZTEST (timer_jitter_drift, test_jitter_drift)
	Test a timers jitter and drift over time. More...
	ZTEST_SUITE (timer_jitter_drift, NULL, NULL, NULL, NULL, NULL)

Variables
static uint32_t	periodic_idx
static uint32_t	periodic_rollovers
static uint64_t	periodic_data [CONFIG_TIMER_TEST_SAMPLES+1]
static uint64_t	periodic_start
static uint64_t	periodic_end
static struct k_timer	periodic_timer

Function Documentation

cycles_to_us()

double cycles_to_us

(

double

cycles

)

K_SEM_DEFINE()

K_SEM_DEFINE	(	periodic_sem	,
		0	,
		1
	)

periodic_diff()

uint64_t periodic_diff	(	uint64_t	later,
		uint64_t	earlier
	)

periodic_fn()

void periodic_fn

(

struct k_timer *

t

)

ZTEST()

ZTEST	(	timer_jitter_drift	,
		test_jitter_drift
	)

Test a timers jitter and drift over time.

Named alpha_jitter_drift as this test requires ideally no clock counter roll overs while running on Arm and should be the first test in the suite to run

ZTEST_SUITE()

ZTEST_SUITE	(	timer_jitter_drift	,
		NULL	,
		NULL	,
		NULL	,
		NULL	,
		NULL
	)

Variable Documentation

periodic_data

uint64_t periodic_data[CONFIG_TIMER_TEST_SAMPLES+1]

static

periodic_end

uint64_t periodic_end

static

periodic_idx

uint32_t periodic_idx

static

periodic_rollovers

uint32_t periodic_rollovers

static

periodic_start

uint64_t periodic_start

static

periodic_timer

struct k_timer periodic_timer

static