tests: drivers: dac: Add write_value API test

# SPDX-License-Identifier: Apache-2.0

cmake_minimum_required(VERSION 3.13.1)

find_package(Zephyr HINTS $ENV{ZEPHYR_BASE})

project(dac_api)

FILE(GLOB app_sources src/*.c)

target_sources(app PRIVATE ${app_sources})

CONFIG_ZTEST=y

CONFIG_DAC=y

CONFIG_TEST_USERSPACE=y

/*

 * Copyright (c) 2020 Libre Solar Technologies GmbH

 *

 * SPDX-License-Identifier: Apache-2.0

 */

/**

 * @addtogroup t_driver_dac

 * @{

 * @defgroup t_dac_basic test_dac_basic_operations

 * @}

 */

#include <zephyr.h>

#include <ztest.h>

extern void test_dac_write_value(void);

extern struct device *get_dac_device(void);

void test_main(void)

{

	k_object_access_grant(get_dac_device(), k_current_get());

	ztest_test_suite(dac_basic_test,

			 ztest_user_unit_test(test_dac_write_value));

	ztest_run_test_suite(dac_basic_test);

}

/*

 * Copyright (c) 2020 Libre Solar Technologies GmbH

 *

 * SPDX-License-Identifier: Apache-2.0

 */

/*

 * @addtogroup test_dac_basic_operations

 * @{

 * @defgroup t_dac_basic_basic_operations test_dac_write

 * @brief TestPurpose: verify DAC driver handles single write

 * @}

 */

#include <drivers/dac.h>

#include <zephyr.h>

#include <ztest.h>

#if defined(CONFIG_BOARD_NUCLEO_L073RZ)

#define DAC_DEVICE_NAME		DT_LABEL(DT_ALIAS(dac1))

#define DAC_CHANNEL_ID		1

#define DAC_RESOLUTION		12

#else

#error "Unsupported board."

#endif

static const struct dac_channel_cfg dac_ch_cfg = {

	.channel_id  = DAC_CHANNEL_ID,

	.resolution  = DAC_RESOLUTION

};

struct device *get_dac_device(void)

{

	return device_get_binding(DAC_DEVICE_NAME);

}

static struct device *init_dac(void)

{

	int ret;

	struct device *dac_dev = device_get_binding(DAC_DEVICE_NAME);

	zassert_not_null(dac_dev, "Cannot get DAC device");

	ret = dac_channel_setup(dac_dev, &dac_ch_cfg);

	zassert_equal(ret, 0,

		"Setting up of the first channel failed with code %d", ret);

	return dac_dev;

}

/*

 * test_dac_write_value

 */

static int test_task_write_value(void)

{

	int ret;

	struct device *dac_dev = init_dac();

	if (!dac_dev) {

		return TC_FAIL;

	}

	/* write a value of half the full scale resolution */

	ret = dac_write_value(dac_dev, DAC_CHANNEL_ID,

						(1U << DAC_RESOLUTION) / 2);

	zassert_equal(ret, 0, "dac_write_value() failed with code %d", ret);

	return TC_PASS;

}

void test_dac_write_value(void)

{

	zassert_true(test_task_write_value() == TC_PASS, NULL);

}

common:

  tags: dac drivers userspace

tests:

  drivers.dac:

    platform_whitelist: nucleo_l073rz

    depends_on: dac