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tests: drivers: pwm: Test PWM events
Test the PWM various events. Signed-off-by: Bartosz Miller <[email protected]>
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‎tests/drivers/pwm/pwm_events/CMakeLists.txt‎

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# SPDX-License-Identifier: LicenseRef-Nordic-5-Clause
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cmake_minimum_required(VERSION 3.20.0)
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find_package(Zephyr REQUIRED HINTS $ENV{ZEPHYR_BASE})
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project(pwm_events)
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target_sources(app PRIVATE src/main.c)

‎tests/drivers/pwm/pwm_events/boards/nrf54h20dk_nrf54h20_cpuapp.overlay‎

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/*
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* Copyright (c) 2025 Nordic Semiconductor ASA
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*
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* SPDX-License-Identifier: LicenseRef-Nordic-5-Clause
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*/
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dut_pwm: &pwm130 {
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status = "okay";
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};
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tst_timer: &timer131 {
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status = "okay";
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};
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&dppic133 {
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owned-channels = <1>;
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sink-channels = <1>;
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status = "okay";
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};

‎tests/drivers/pwm/pwm_events/boards/nrf54l15dk_nrf54l15_cpuapp.overlay‎

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/*
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* Copyright (c) 2025 Nordic Semiconductor ASA
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*
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* SPDX-License-Identifier: LicenseRef-Nordic-5-Clause
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*/
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dut_pwm: &pwm20 {
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status = "okay";
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};
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tst_timer: &timer20 {
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status = "okay";
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};
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&dppic20 {
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status = "okay";
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};

‎tests/drivers/pwm/pwm_events/boards/nrf54lm20dk_nrf54lm20a_cpuapp.overlay‎

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/*
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* Copyright (c) 2025 Nordic Semiconductor ASA
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*
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* SPDX-License-Identifier: LicenseRef-Nordic-5-Clause
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*/
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dut_pwm: &pwm20 {
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status = "okay";
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};
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tst_timer: &timer20 {
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status = "okay";
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};
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&dppic20 {
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status = "okay";
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};

‎tests/drivers/pwm/pwm_events/boards/nrf54ls05dk_nrf54ls05b_cpuapp.overlay‎

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/*
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* Copyright (c) 2025 Nordic Semiconductor ASA
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*
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* SPDX-License-Identifier: LicenseRef-Nordic-5-Clause
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*/
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dut_pwm: &pwm20 {
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status = "okay";
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};
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tst_timer: &timer20 {
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status = "okay";
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};
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&dppic20 {
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status = "okay";
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};

‎tests/drivers/pwm/pwm_events/prj.conf‎

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CONFIG_NRFX_PWM=y
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CONFIG_NRFX_TIMER=y
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CONFIG_NRFX_GPPI=y
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CONFIG_ZTEST=y

‎tests/drivers/pwm/pwm_events/src/main.c‎

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/*
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* Copyright (c) 2025, Nordic Semiconductor ASA
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*
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* SPDX-License-Identifier: LicenseRef-Nordic-5-Clause
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*/
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#include <zephyr/kernel.h>
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#include <zephyr/ztest.h>
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#include <nrfx_pwm.h>
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#include <nrfx_timer.h>
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#include <helpers/nrfx_gppi.h>
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#define PWM_OUTPUT_PIN NRF_DT_GPIOS_TO_PSEL(DT_NODELABEL(led2), gpios)
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#define SLEEP_TIME_MS 500
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struct pwm_events_fixture {
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nrfx_pwm_t *pwm;
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nrf_pwm_sequence_t *pwm_sequence;
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nrfx_timer_t *test_timer;
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uint32_t timer_task_address;
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uint32_t domain_id;
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nrfx_gppi_handle_t gppi_handle;
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};
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static void configure_pwm(nrfx_pwm_t *pwm)
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{
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nrfx_pwm_config_t pwm_config =
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NRFX_PWM_DEFAULT_CONFIG(PWM_OUTPUT_PIN, NRF_PWM_PIN_NOT_CONNECTED,
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NRF_PWM_PIN_NOT_CONNECTED, NRF_PWM_PIN_NOT_CONNECTED);
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pwm_config.count_mode = NRF_PWM_MODE_UP_AND_DOWN;
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zassert_ok(nrfx_pwm_init(pwm, &pwm_config, NULL, NULL), "NRFX PWM init failed\n");
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}
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static uint32_t configure_test_timer(nrfx_timer_t *timer)
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{
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uint32_t base_frequency = NRF_TIMER_BASE_FREQUENCY_GET(timer->p_reg);
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nrfx_timer_config_t timer_config = NRFX_TIMER_DEFAULT_CONFIG(base_frequency);
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timer_config.bit_width = NRF_TIMER_BIT_WIDTH_16;
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timer_config.mode = NRF_TIMER_MODE_COUNTER;
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TC_PRINT("Timer base frequency: %d Hz\n", base_frequency);
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zassert_ok(nrfx_timer_init(timer, &timer_config, NULL), "Timer init failed\n");
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nrfx_timer_enable(timer);
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return nrfx_timer_task_address_get(timer, NRF_TIMER_TASK_COUNT);
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}
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static void setup_dppi_connection(nrfx_gppi_handle_t *gppi_handle, uint32_t domain_id,
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uint32_t timer_task_address, uint32_t pwm_event_address)
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{
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zassert_ok(nrfx_gppi_conn_alloc(pwm_event_address, timer_task_address, gppi_handle),
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"Failed to allocate DPPI connection\n");
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nrfx_gppi_conn_enable(*gppi_handle);
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}
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static void clear_dppi_connection(nrfx_gppi_handle_t *gppi_handle, uint32_t domain_id,
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uint32_t timer_task_address, uint32_t pwm_event_address)
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{
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nrfx_gppi_conn_disable(*gppi_handle);
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nrfx_gppi_conn_free(pwm_event_address, timer_task_address, *gppi_handle);
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}
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static void run_pwm_event_test_case(struct pwm_events_fixture *fixture,
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nrf_pwm_event_t tested_pwm_event,
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uint32_t expected_triggers_count, char *event_name)
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{
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uint32_t pwm_event_address;
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uint32_t timer_cc_before, timer_cc_after;
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pwm_event_address = nrf_pwm_event_address_get(fixture->pwm->p_reg, tested_pwm_event);
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setup_dppi_connection(&fixture->gppi_handle, fixture->domain_id,
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fixture->timer_task_address, pwm_event_address);
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nrf_pwm_event_clear(fixture->pwm->p_reg, tested_pwm_event);
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timer_cc_before = nrfx_timer_capture(fixture->test_timer, NRF_TIMER_CC_CHANNEL0);
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nrfx_pwm_simple_playback(fixture->pwm, fixture->pwm_sequence, 1, NRFX_PWM_FLAG_STOP);
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k_msleep(SLEEP_TIME_MS);
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timer_cc_after = nrfx_timer_capture(fixture->test_timer, NRF_TIMER_CC_CHANNEL0);
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TC_PRINT("PWM %s events count: %d\n", event_name, timer_cc_after - timer_cc_before);
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zassert_equal(timer_cc_after - timer_cc_before, expected_triggers_count,
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"PWM %s event triggered count != %u\n", event_name, expected_triggers_count);
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nrf_pwm_event_clear(fixture->pwm->p_reg, tested_pwm_event);
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clear_dppi_connection(&fixture->gppi_handle, fixture->domain_id,
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fixture->timer_task_address, pwm_event_address);
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}
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ZTEST_F(pwm_events, test_pwm_stop_event)
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{
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run_pwm_event_test_case(fixture, NRF_PWM_EVENT_STOPPED, 1, "STOP");
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}
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ZTEST_F(pwm_events, test_pwm_seqstarted_event)
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{
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run_pwm_event_test_case(fixture, NRF_PWM_EVENT_SEQSTARTED1, 1, "SEQSTARTED1");
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}
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ZTEST_F(pwm_events, test_pwm_seqend_event)
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{
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run_pwm_event_test_case(fixture, NRF_PWM_EVENT_SEQEND1, 1, "SEQEND1");
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}
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ZTEST_F(pwm_events, test_pwm_periodend_event)
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{
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run_pwm_event_test_case(fixture, NRF_PWM_EVENT_PWMPERIODEND, fixture->pwm_sequence->length,
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"PWMPERIODEND");
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}
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ZTEST_F(pwm_events, test_pwm_loopsdone_event)
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{
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run_pwm_event_test_case(fixture, NRF_PWM_EVENT_LOOPSDONE, 1, "LOOPSDONE");
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}
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static void *test_setup(void)
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{
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static struct pwm_events_fixture fixture;
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static nrfx_timer_t test_timer = NRFX_TIMER_INSTANCE(DT_REG_ADDR(DT_NODELABEL(tst_timer)));
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static nrfx_pwm_t pwm = NRFX_PWM_INSTANCE(DT_REG_ADDR(DT_NODELABEL(dut_pwm)));
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static nrf_pwm_values_common_t pwm_duty_cycle_values[] = {0x500, 0x600};
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static nrf_pwm_sequence_t pwm_sequence = {.values = {pwm_duty_cycle_values},
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.length = ARRAY_SIZE(pwm_duty_cycle_values),
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.repeats = 0,
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.end_delay = 0};
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fixture.pwm = &pwm;
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fixture.pwm_sequence = &pwm_sequence;
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configure_pwm(&pwm);
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fixture.test_timer = &test_timer;
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fixture.timer_task_address = configure_test_timer(&test_timer);
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fixture.domain_id = nrfx_gppi_domain_id_get((uint32_t)test_timer.p_reg);
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return &fixture;
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}
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ZTEST_SUITE(pwm_events, NULL, test_setup, NULL, NULL, NULL);

‎tests/drivers/pwm/pwm_events/testcase.yaml‎

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common:
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tags:
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- drivers
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- ci_tests_drivers_pwm
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harness: ztest
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timeout: 20
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tests:
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drivers.pwm.pwm_events:
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platform_allow:
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- nrf54h20dk/nrf54h20/cpuapp
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- nrf54l15dk/nrf54l15/cpuapp
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- nrf54lm20dk/nrf54lm20a/cpuapp
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- nrf54ls05dk/nrf54ls05b/cpuapp
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integration_platforms:
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- nrf54l15dk/nrf54l15/cpuapp

‎tests/drivers/spi/spim_pan/boards/nrf54h20dk_nrf54h20_cpuapp.overlay‎

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owned-channels = <1>;
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sink-channels = <1>;
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status = "okay";
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};
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};

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