diff options
Diffstat (limited to 'zephyr/test/drivers/src/thermistor.c')
| -rw-r--r-- | zephyr/test/drivers/src/thermistor.c | 295 |
1 files changed, 0 insertions, 295 deletions
diff --git a/zephyr/test/drivers/src/thermistor.c b/zephyr/test/drivers/src/thermistor.c deleted file mode 100644 index a7137d5f19..0000000000 --- a/zephyr/test/drivers/src/thermistor.c +++ /dev/null @@ -1,295 +0,0 @@ -/* Copyright 2021 The Chromium OS Authors. All rights reserved. - * Use of this source code is governed by a BSD-style license that can be - * found in the LICENSE file. - */ - -#include <zephyr.h> -#include <ztest.h> -#include <drivers/adc.h> -#include <drivers/adc/adc_emul.h> -#include <drivers/gpio.h> -#include <drivers/gpio/gpio_emul.h> -#include <temp_sensor.h> - -#include "common.h" -#include "../driver/temp_sensor/thermistor.h" -#include "temp_sensor/temp_sensor.h" - - -#define GPIO_PG_EC_DSW_PWROK_PATH DT_PATH(named_gpios, pg_ec_dsw_pwrok) -#define GPIO_PG_EC_DSW_PWROK_PORT DT_GPIO_PIN(GPIO_PG_EC_DSW_PWROK_PATH, gpios) - -#define ADC_DEVICE_NODE DT_NODELABEL(adc0) - -/* TODO replace counting macros with DT macro when - * https://github.com/zephyrproject-rtos/zephyr/issues/38715 lands - */ -#define _ACCUMULATOR(x) -#define NAMED_TEMP_SENSORS_SIZE \ - DT_FOREACH_CHILD(DT_PATH(named_temp_sensors), _ACCUMULATOR) \ - 0 -#define TEMP_SENSORS_ENABLED_SIZE \ - DT_FOREACH_STATUS_OKAY(cros_ec_temp_sensor, _ACCUMULATOR) 0 - -/* Conversion of temperature doesn't need to be 100% accurate */ -#define TEMP_EPS 2 - -#define A_VALID_VOLTAGE 1000 -/** - * Test if get temp function return expected error when ADC is not powered - * (indicated as GPIO pin set to low) and return success after powering on ADC. - */ -static void test_thermistor_power_pin(void) -{ - int temp; - int sensor_idx; - - const struct device *gpio_dev = - DEVICE_DT_GET(DT_GPIO_CTLR(GPIO_PG_EC_DSW_PWROK_PATH, gpios)); - const struct device *adc_dev = DEVICE_DT_GET(ADC_DEVICE_NODE); - - zassert_not_null(gpio_dev, "Cannot get GPIO device"); - zassert_not_null(adc_dev, "Cannot get ADC device"); - - /* Make sure that ADC return a valid value */ - for (sensor_idx = 0; sensor_idx < NAMED_TEMP_SENSORS_SIZE; - sensor_idx++) { - const struct temp_sensor_t *sensor = &temp_sensors[sensor_idx]; - - zassert_ok(adc_emul_const_value_set(adc_dev, - sensor->idx, - A_VALID_VOLTAGE), - "adc_emul_value_func_set() failed on %s", - sensor->name); - } - - /* pg_ec_dsw_pwrok = 0 means ADC is not powered. */ - zassert_ok(gpio_emul_input_set(gpio_dev, GPIO_PG_EC_DSW_PWROK_PORT, 0), - NULL); - - for (sensor_idx = 0; sensor_idx < NAMED_TEMP_SENSORS_SIZE; - sensor_idx++) { - const struct temp_sensor_t *sensor = &temp_sensors[sensor_idx]; - - zassert_equal(EC_ERROR_NOT_POWERED, sensor->read(sensor, &temp), - "%s failed", sensor->name); - } - - /* pg_ec_dsw_pwrok = 1 means ADC is powered. */ - zassert_ok(gpio_emul_input_set(gpio_dev, GPIO_PG_EC_DSW_PWROK_PORT, 1), - NULL); - - for (sensor_idx = 0; sensor_idx < NAMED_TEMP_SENSORS_SIZE; - sensor_idx++) { - const struct temp_sensor_t *sensor = &temp_sensors[sensor_idx]; - - zassert_equal(EC_SUCCESS, sensor->read(sensor, &temp), - "%s failed", sensor->name); - } -} - -/* Simple ADC emulator custom function which always return error */ -static int adc_error_func(const struct device *dev, unsigned int channel, - void *param, uint32_t *result) -{ - return -EINVAL; -} - -/** Test if get temp function return expected error on ADC malfunction */ -static void test_thermistor_adc_read_error(void) -{ - int temp; - int sensor_idx; - - const struct device *adc_dev = DEVICE_DT_GET(ADC_DEVICE_NODE); - - zassert_not_null(adc_dev, "Cannot get ADC device"); - - /* Return error on all ADC channels */ - for (sensor_idx = 0; sensor_idx < NAMED_TEMP_SENSORS_SIZE; - sensor_idx++) { - const struct temp_sensor_t *sensor = &temp_sensors[sensor_idx]; - - zassert_ok(adc_emul_value_func_set(adc_dev, sensor->idx, - adc_error_func, NULL), - "adc_emul_value_func_set() failed on %s", - sensor->name); - } - - for (sensor_idx = 0; sensor_idx < NAMED_TEMP_SENSORS_SIZE; - sensor_idx++) { - const struct temp_sensor_t *sensor = &temp_sensors[sensor_idx]; - - zassert_equal(EC_ERROR_UNKNOWN, sensor->read(sensor, &temp), - "%s failed", sensor->name); - } -} - -/** Get resistance of thermistor for given temperature */ -static int resistance_47kohm_B4050(int t) -{ - /* Thermistor manufacturer resistance lookup table*/ - int r_table[] = { - 155700, 147900, 140600, 133700, 127200, /* 0*C - 4*C */ - 121000, 115100, 109600, 104300, 99310, /* 5*C - 9*C */ - 94600, 90130, 85890, 81870, 78070, /* 10*C - 14*C */ - 74450, 71020, 67770, 64680, 61750, /* 15*C - 19*C */ - 58970, 56320, 53810, 51430, 49160, /* 20*C - 24*C */ - 47000, 44950, 42990, 41130, 39360, /* 25*C - 29*C */ - 37680, 36070, 34540, 33080, 31690, /* 30*C - 34*C */ - 30360, 29100, 27900, 26750, 25650, /* 35*C - 39*C */ - 24610, 23610, 22660, 21750, 20880, /* 40*C - 44*C */ - 20050, 19260, 18500, 17780, 17090, /* 45*C - 49*C */ - 16430, 15800, 15200, 14620, 14070, /* 50*C - 54*C */ - 13540, 13030, 12550, 12090, 11640, /* 55*C - 59*C */ - 11210, 10800, 10410, 10040, 9676, /* 60*C - 64*C */ - 9331, 8999, 8680, 8374, 8081, /* 65*C - 69*C */ - 7799, 7528, 7268, 7018, 6777, /* 70*C - 74*C */ - 6546, 6324, 6111, 5906, 5708, /* 75*C - 79*C */ - 5518, 5335, 5160, 4990, 4827, /* 80*C - 84*C */ - 4671, 4519, 4374, 4233, 4098, /* 85*C - 89*C */ - 3968, 3842, 3721, 3605, 3492, /* 90*C - 94*C */ - 3384, 3279, 3179, 3082, 2988, /* 95*C - 99*C */ - 2898 /* 100*C */ - }; - - t -= 273; - if (t < 0) - return r_table[0] + 10000; - - if (t >= ARRAY_SIZE(r_table)) - return r_table[ARRAY_SIZE(r_table) - 1] - 100; - - return r_table[t]; -} - -/** - * Calculate output voltage in voltage divider circuit using formula - * Vout = Vs * r2 / (r1 + r2) - */ -static int volt_divider(int vs, int r1, int r2) -{ - return vs * r2 / (r1 + r2); -} - -struct thermistor_state { - const int v; - const int r; - int temp_expected; -}; - -/** ADC emulator function which calculate output voltage for given thermistor */ -static int adc_temperature_func(const struct device *dev, unsigned int channel, - void *param, uint32_t *result) -{ - struct thermistor_state *s = (struct thermistor_state *)param; - - *result = volt_divider(s->v, - s->r, - resistance_47kohm_B4050(s->temp_expected)); - - return 0; -} - -/** Test conversion from ADC raw value to temperature */ -static void do_thermistor_test(const struct temp_sensor_t *temp_sensor, - int reference_mv, int reference_ohms) -{ - int temp_expected; - int temp; - - const struct device *adc_dev = DEVICE_DT_GET(ADC_DEVICE_NODE); - struct thermistor_state state = { - .v = reference_mv, - .r = reference_ohms, - }; - - zassert_not_null(adc_dev, "Cannot get ADC device"); - - /* Setup ADC channel */ - zassert_ok(adc_emul_value_func_set(adc_dev, - temp_sensor->idx, - adc_temperature_func, &state), - "adc_emul_value_func_set() failed on %s", temp_sensor->name); - - /* Makes sure that reference voltage is correct for given thermistor */ - zassert_ok(adc_emul_ref_voltage_set(adc_dev, ADC_REF_INTERNAL, state.v), - "adc_emul_ref_voltage_set() failed %s on ", - temp_sensor->name); - - /* Test whole supported range from 0*C to 100*C (273*K to 373*K) */ - for (temp_expected = 273; temp_expected <= 373; temp_expected++) { - state.temp_expected = temp_expected; - zassert_equal(EC_SUCCESS, temp_sensor->read(temp_sensor, &temp), - "failed on %s", temp_sensor->name); - zassert_within(temp_expected, temp, TEMP_EPS, - "Expected %d*K, got %d*K on %s", temp_expected, - temp, temp_sensor->name); - } - - /* Temperatures below 0*C should be reported as 0*C */ - state.temp_expected = -15 + 273; - zassert_equal(EC_SUCCESS, temp_sensor->read(temp_sensor, &temp), - "failed on %s", temp_sensor->name); - zassert_equal(273, temp, "Expected %d*K, got %d*K on %s", 273, temp, - temp_sensor->name); - - /* Temperatures above 100*C should be reported as 100*C */ - state.temp_expected = 115 + 273; - zassert_equal(EC_SUCCESS, temp_sensor->read(temp_sensor, &temp), - "failed on %s", temp_sensor->name); - zassert_equal(373, temp, "Expected %d*K, got %d*K on %s", 373, temp, - temp_sensor->name); -} - -#define GET_THERMISTOR_REF_MV(node_id) \ - [ZSHIM_TEMP_SENSOR_ID(node_id)] = DT_PROP( \ - DT_PHANDLE(node_id, thermistor), steinhart_reference_mv), - -#define GET_THERMISTOR_REF_RES(node_id) \ - [ZSHIM_TEMP_SENSOR_ID(node_id)] = DT_PROP( \ - DT_PHANDLE(node_id, thermistor), steinhart_reference_res), - -static void test_thermistors_adc_temperature_conversion(void) -{ - int sensor_idx; - - const static int reference_mv_arr[] = { DT_FOREACH_STATUS_OKAY( - cros_temp_sensor, GET_THERMISTOR_REF_MV) }; - const static int reference_res_arr[] = { DT_FOREACH_STATUS_OKAY( - cros_temp_sensor, GET_THERMISTOR_REF_RES) }; - - for (sensor_idx = 0; sensor_idx < NAMED_TEMP_SENSORS_SIZE; sensor_idx++) - do_thermistor_test(&temp_sensors[sensor_idx], - reference_mv_arr[sensor_idx], - reference_res_arr[sensor_idx]); -} - -static void test_device_nodes_enabled(void) -{ - zassert_equal(NAMED_TEMP_SENSORS_SIZE, TEMP_SENSORS_ENABLED_SIZE, - "Temperature sensors in device tree and " - "those enabled for test differ"); - - /* Thermistor nodes being enabled are already tested by compilation. */ -} - -void test_suite_thermistor(void) -{ - const struct device *dev = - DEVICE_DT_GET(DT_GPIO_CTLR(GPIO_PG_EC_DSW_PWROK_PATH, gpios)); - - zassert_not_null(dev, NULL); - /* Before tests make sure that power pin is set. */ - zassert_ok(gpio_emul_input_set(dev, GPIO_PG_EC_DSW_PWROK_PORT, 1), - NULL); - - ztest_test_suite(thermistor, - ztest_user_unit_test(test_device_nodes_enabled), - ztest_user_unit_test(test_thermistor_power_pin), - ztest_user_unit_test(test_thermistor_adc_read_error), - ztest_user_unit_test( - test_thermistors_adc_temperature_conversion)); - - ztest_run_test_suite(thermistor); -} |