Fake PWM

Fake PWM driver. More...

Files
file	pwm_fake.h
	Fake PWM driver API functions.

Functions
int	fake_pwm_set_cycles (const struct device *, uint32_t, uint32_t, uint32_t, pwm_flags_t)
	Fake implementation of the pwm_driver_api::set_cycles driver operation.

Detailed Description

Fake PWM driver.

This is a Fake Function Framework (FFF) implementation of the PWM API, provided for use in tests. It is enabled by CONFIG_PWM_FAKE and instantiated from zephyr,fake-pwm devicetree nodes.

Each fake below is paired with an FFF control structure named after it with an additional _fake suffix, which tests use to set return values, install custom fakes, or inspect call counts and captured arguments. The control structures are not listed here; see Mocking via FFF.

Use return_val for fakes that only report status; a fake with output parameters must be driven with a custom_fake, as return_val leaves those parameters untouched.

When CONFIG_ZTEST is enabled, a ztest rule resets every fake before each test case.

const struct device *dev = DEVICE_DT_GET(DT_NODELABEL(fake_pwm));
 
zassert_ok(pwm_set_cycles(dev, 0, 1000, 500, 0));
 
zassert_equal(1, fake_pwm_set_cycles_fake.call_count);
zassert_equal(1000, fake_pwm_set_cycles_fake.arg2_val);
zassert_equal(500, fake_pwm_set_cycles_fake.arg3_val);

Function Documentation

fake_pwm_set_cycles()

int fake_pwm_set_cycles	(	const struct device *	,
		uint32_t	,
		uint32_t	,
		uint32_t	,
		pwm_flags_t	)

#include <zephyr/drivers/pwm/pwm_fake.h>

Fake implementation of the pwm_driver_api::set_cycles driver operation.