diff options
Diffstat (limited to 'zephyr/test/drivers/src/thermistor.c')
| -rw-r--r-- | zephyr/test/drivers/src/thermistor.c | 456 |
1 files changed, 456 insertions, 0 deletions
diff --git a/zephyr/test/drivers/src/thermistor.c b/zephyr/test/drivers/src/thermistor.c new file mode 100644 index 0000000000..621cdfaa68 --- /dev/null +++ b/zephyr/test/drivers/src/thermistor.c @@ -0,0 +1,456 @@ +/* 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 "common.h" +#include "../driver/temp_sensor/thermistor.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_NAME DT_LABEL(DT_NODELABEL(adc0)) + +#define TEMP_3V3_13K7_47K_4050B_INST DT_INST(0, temp_3v3_13k7_47k_4050b) +#define ADC_CHANNEL_3V3_13K7_47K_4050B \ + DT_PROP(DT_PHANDLE(TEMP_3V3_13K7_47K_4050B_INST, adc), channel) + +#define TEMP_3V3_30K9_47K_4050B_INST DT_INST(0, temp_3v3_30k9_47k_4050b) +#define ADC_CHANNEL_3V3_30K9_47K_4050B \ + DT_PROP(DT_PHANDLE(TEMP_3V3_30K9_47K_4050B_INST, adc), channel) + +#define TEMP_3V3_51K1_47K_4050B_INST DT_INST(0, temp_3v3_51k1_47k_4050b) +#define ADC_CHANNEL_3V3_51K1_47K_4050B \ + DT_PROP(DT_PHANDLE(TEMP_3V3_51K1_47K_4050B_INST, adc), channel) + +#define TEMP_3V0_22K6_47K_4050B_INST DT_INST(0, temp_3v0_22k6_47k_4050b) +#define ADC_CHANNEL_3V0_22K6_47K_4050B \ + DT_PROP(DT_PHANDLE(TEMP_3V0_22K6_47K_4050B_INST, adc), channel) + +/* Conversion of temperature doesn't need to be 100% accurate */ +#define TEMP_EPS 2 + +/** + * 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) +{ + const struct device *gpio_dev = + DEVICE_DT_GET(DT_GPIO_CTLR(GPIO_PG_EC_DSW_PWROK_PATH, gpios)); + const struct device *adc_dev = device_get_binding(ADC_DEVICE_NAME); + int temp; + + zassert_not_null(gpio_dev, "Cannot get GPIO device"); + zassert_not_null(adc_dev, "Cannot get ADC device"); + + /* Make sure that ADC return any valid value */ + zassert_ok(adc_emul_const_value_set(adc_dev, + ADC_CHANNEL_3V3_13K7_47K_4050B, + 1000), + "adc_emul_const_value_set() failed"); + zassert_ok(adc_emul_const_value_set(adc_dev, + ADC_CHANNEL_3V3_30K9_47K_4050B, + 1000), + "adc_emul_const_value_set() failed"); + zassert_ok(adc_emul_const_value_set(adc_dev, + ADC_CHANNEL_3V3_51K1_47K_4050B, + 1000), + "adc_emul_const_value_set() failed"); + zassert_ok(adc_emul_const_value_set(adc_dev, + ADC_CHANNEL_3V0_22K6_47K_4050B, + 1000), + "adc_emul_const_value_set() failed"); + + /* 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); + zassert_equal(EC_ERROR_NOT_POWERED, + get_temp_3v3_13k7_47k_4050b( + ADC_CHANNEL_3V3_13K7_47K_4050B, &temp), + NULL); + zassert_equal(EC_ERROR_NOT_POWERED, + get_temp_3v3_30k9_47k_4050b( + ADC_CHANNEL_3V3_30K9_47K_4050B, &temp), + NULL); + zassert_equal(EC_ERROR_NOT_POWERED, + get_temp_3v3_51k1_47k_4050b( + ADC_CHANNEL_3V3_51K1_47K_4050B, &temp), + NULL); + zassert_equal(EC_ERROR_NOT_POWERED, + get_temp_3v0_22k6_47k_4050b( + ADC_CHANNEL_3V0_22K6_47K_4050B, &temp), + NULL); + + /* 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); + zassert_equal(EC_SUCCESS, + get_temp_3v3_13k7_47k_4050b( + ADC_CHANNEL_3V3_13K7_47K_4050B, &temp), + NULL); + zassert_equal(EC_SUCCESS, + get_temp_3v3_30k9_47k_4050b( + ADC_CHANNEL_3V3_30K9_47K_4050B, &temp), + NULL); + zassert_equal(EC_SUCCESS, + get_temp_3v3_51k1_47k_4050b( + ADC_CHANNEL_3V3_51K1_47K_4050B, &temp), + NULL); + zassert_equal(EC_SUCCESS, + get_temp_3v0_22k6_47k_4050b( + ADC_CHANNEL_3V0_22K6_47K_4050B, &temp), + NULL); + +} + +/** 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) +{ + const struct device *adc_dev = device_get_binding(ADC_DEVICE_NAME); + int temp; + + zassert_not_null(adc_dev, "Cannot get ADC device"); + + /* Return error on all ADC channels */ + zassert_ok(adc_emul_value_func_set(adc_dev, + ADC_CHANNEL_3V3_13K7_47K_4050B, + adc_error_func, NULL), + "adc_emul_value_func_set() failed"); + zassert_ok(adc_emul_value_func_set(adc_dev, + ADC_CHANNEL_3V3_30K9_47K_4050B, + adc_error_func, NULL), + "adc_emul_value_func_set() failed"); + zassert_ok(adc_emul_value_func_set(adc_dev, + ADC_CHANNEL_3V3_51K1_47K_4050B, + adc_error_func, NULL), + "adc_emul_value_func_set() failed"); + zassert_ok(adc_emul_value_func_set(adc_dev, + ADC_CHANNEL_3V0_22K6_47K_4050B, + adc_error_func, NULL), + "adc_emul_value_func_set() failed"); + + zassert_equal(EC_ERROR_UNKNOWN, + get_temp_3v3_13k7_47k_4050b( + ADC_CHANNEL_3V3_13K7_47K_4050B, &temp), + NULL); + zassert_equal(EC_ERROR_UNKNOWN, + get_temp_3v3_30k9_47k_4050b( + ADC_CHANNEL_3V3_30K9_47K_4050B, &temp), + NULL); + zassert_equal(EC_ERROR_UNKNOWN, + get_temp_3v3_51k1_47k_4050b( + ADC_CHANNEL_3V3_51K1_47K_4050B, &temp), + NULL); + zassert_equal(EC_ERROR_UNKNOWN, + get_temp_3v0_22k6_47k_4050b( + ADC_CHANNEL_3V0_22K6_47K_4050B, &temp), + NULL); +} + +/** Get resistance of thermistor for given temperature */ +static int resistance(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(s->temp_expected)); + + return 0; +} + +/** Test conversion from ADC raw value to temperature */ +static void test_thermistor_3v3_13k7_47k_4050b(void) +{ + const struct device *adc_dev = device_get_binding(ADC_DEVICE_NAME); + struct thermistor_state state = { + .v = 3300, + .r = 13700, + }; + int temp_expected; + int temp; + + zassert_not_null(adc_dev, "Cannot get ADC device"); + + /* Setup ADC channel */ + zassert_ok(adc_emul_value_func_set(adc_dev, + ADC_CHANNEL_3V3_13K7_47K_4050B, + adc_temperature_func, &state), + "adc_emul_value_func_set() failed"); + + /* 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"); + + /* 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, + get_temp_3v3_13k7_47k_4050b( + ADC_CHANNEL_3V3_13K7_47K_4050B, &temp), + NULL); + zassert_within(temp_expected, temp, TEMP_EPS, + "Expected %d*K, got %d*K", temp_expected, temp); + } + + /* Temperatures below 0*C should be reported as 0*C */ + state.temp_expected = -15 + 273; + zassert_equal(EC_SUCCESS, + get_temp_3v3_13k7_47k_4050b( + ADC_CHANNEL_3V3_13K7_47K_4050B, &temp), + NULL); + zassert_equal(273, temp, "Expected %d*K, got %d*K", 273, temp); + + /* Temperatures above 100*C should be reported as 100*C */ + state.temp_expected = 115 + 273; + zassert_equal(EC_SUCCESS, + get_temp_3v3_13k7_47k_4050b( + ADC_CHANNEL_3V3_13K7_47K_4050B, &temp), + NULL); + zassert_equal(373, temp, "Expected %d*K, got %d*K", 373, temp); +} + +/** Test conversion from ADC raw value to temperature */ +static void test_thermistor_3v3_30k9_47k_4050b(void) +{ + const struct device *adc_dev = device_get_binding(ADC_DEVICE_NAME); + struct thermistor_state state = { + .v = 3300, + .r = 30900, + }; + int temp_expected; + int temp; + + zassert_not_null(adc_dev, "Cannot get ADC device"); + + /* Setup ADC channel */ + zassert_ok(adc_emul_value_func_set(adc_dev, + ADC_CHANNEL_3V3_30K9_47K_4050B, + adc_temperature_func, &state), + "adc_emul_value_func_set() failed"); + + /* 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"); + + /* 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, + get_temp_3v3_30k9_47k_4050b( + ADC_CHANNEL_3V3_30K9_47K_4050B, &temp), + NULL); + zassert_within(temp_expected, temp, TEMP_EPS, + "Expected %d*K, got %d*K", temp_expected, temp); + } + + /* Temperatures below 0*C should be reported as 0*C */ + state.temp_expected = -15 + 273; + zassert_equal(EC_SUCCESS, + get_temp_3v3_30k9_47k_4050b( + ADC_CHANNEL_3V3_30K9_47K_4050B, &temp), + NULL); + zassert_equal(273, temp, "Expected %d*K, got %d*K", 273, temp); + + /* Temperatures above 100*C should be reported as 100*C */ + state.temp_expected = 115 + 273; + zassert_equal(EC_SUCCESS, + get_temp_3v3_30k9_47k_4050b( + ADC_CHANNEL_3V3_30K9_47K_4050B, &temp), + NULL); + zassert_equal(373, temp, "Expected %d*K, got %d*K", 373, temp); +} + +/** Test conversion from ADC raw value to temperature */ +static void test_thermistor_3v3_51k1_47k_4050b(void) +{ + const struct device *adc_dev = device_get_binding(ADC_DEVICE_NAME); + struct thermistor_state state = { + .v = 3300, + .r = 51100, + }; + int temp_expected; + int temp; + + zassert_not_null(adc_dev, "Cannot get ADC device"); + + /* Setup ADC channel */ + zassert_ok(adc_emul_value_func_set(adc_dev, + ADC_CHANNEL_3V3_51K1_47K_4050B, + adc_temperature_func, &state), + "adc_emul_value_func_set() failed"); + + /* 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"); + + /* 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, + get_temp_3v3_51k1_47k_4050b( + ADC_CHANNEL_3V3_51K1_47K_4050B, &temp), + NULL); + zassert_within(temp_expected, temp, TEMP_EPS, + "Expected %d*K, got %d*K", temp_expected, temp); + } + + /* Temperatures below 0*C should be reported as 0*C */ + state.temp_expected = -15 + 273; + zassert_equal(EC_SUCCESS, + get_temp_3v3_51k1_47k_4050b( + ADC_CHANNEL_3V3_51K1_47K_4050B, &temp), + NULL); + zassert_equal(273, temp, "Expected %d*K, got %d*K", 273, temp); + + /* Temperatures above 100*C should be reported as 100*C */ + state.temp_expected = 115 + 273; + zassert_equal(EC_SUCCESS, + get_temp_3v3_51k1_47k_4050b( + ADC_CHANNEL_3V3_51K1_47K_4050B, &temp), + NULL); + zassert_equal(373, temp, "Expected %d*K, got %d*K", 373, temp); +} + +/** Test conversion from ADC raw value to temperature */ +static void test_thermistor_3v0_22k6_47k_4050b(void) +{ + const struct device *adc_dev = device_get_binding(ADC_DEVICE_NAME); + struct thermistor_state state = { + .v = 3000, + .r = 22600, + }; + int temp_expected; + int temp; + + zassert_not_null(adc_dev, "Cannot get ADC device"); + + /* Setup ADC channel */ + zassert_ok(adc_emul_value_func_set(adc_dev, + ADC_CHANNEL_3V0_22K6_47K_4050B, + adc_temperature_func, &state), + "adc_emul_value_func_set() failed"); + + /* 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"); + + /* 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, + get_temp_3v0_22k6_47k_4050b( + ADC_CHANNEL_3V0_22K6_47K_4050B, &temp), + NULL); + zassert_within(temp_expected, temp, TEMP_EPS, + "Expected %d*K, got %d*K", temp_expected, temp); + } + + /* Temperatures below 0*C should be reported as 0*C */ + state.temp_expected = -15 + 273; + zassert_equal(EC_SUCCESS, + get_temp_3v0_22k6_47k_4050b( + ADC_CHANNEL_3V0_22K6_47K_4050B, &temp), + NULL); + zassert_equal(273, temp, "Expected %d*K, got %d*K", 273, temp); + + /* Temperatures above 100*C should be reported as 100*C */ + state.temp_expected = 115 + 273; + zassert_equal(EC_SUCCESS, + get_temp_3v0_22k6_47k_4050b( + ADC_CHANNEL_3V0_22K6_47K_4050B, &temp), + NULL); + zassert_equal(373, temp, "Expected %d*K, got %d*K", 373, temp); +} + +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_thermistor_power_pin), + ztest_user_unit_test(test_thermistor_adc_read_error), + ztest_user_unit_test( + test_thermistor_3v3_13k7_47k_4050b), + ztest_user_unit_test( + test_thermistor_3v3_30k9_47k_4050b), + ztest_user_unit_test( + test_thermistor_3v3_51k1_47k_4050b), + ztest_user_unit_test( + test_thermistor_3v0_22k6_47k_4050b)); + ztest_run_test_suite(thermistor); +} |