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test: adc: current sense amplifier

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adds tests for the current sense amplifier binding macro and rescaling
function.

Signed-off-by: Jason Yuan <jasonyuan@google.com>
This commit is contained in:
Jason Yuan 2023-03-23 13:56:27 -07:00 committed by Carles Cufí
parent fe20701bd8
commit 570bcd3c83
2 changed files with 64 additions and 6 deletions
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20
tests/drivers/adc/adc_rescale/boards/native_posix.overlay
View File

@ -16,13 +16,20 @@
sensor1: css {
compatible = "current-sense-shunt";
io-channels = <&adc0 0>;
io-channels = <&adc0 1>;
shunt-resistor-micro-ohms = <500000>;
};
sensor2: csa {
compatible = "current-sense-amplifier";
io-channels = <&adc0 2>;
sense-resistor-micro-ohms = <5000>;
sense-gain-mult = <100>;
};
adc0: adc {
compatible = "zephyr,adc-emul";
nchannels = <2>;
nchannels = <3>;
ref-internal-mv = <3300>;
ref-external1-mv = <5000>;
#io-channel-cells = <1>;
@ -51,4 +58,13 @@
zephyr,acquisition-time = <ADC_ACQ_TIME_DEFAULT>;
zephyr,resolution = <12>;
};
channel@2 {
reg = <2>;
zephyr,gain = "ADC_GAIN_1";
zephyr,reference = "ADC_REF_INTERNAL";
zephyr,vref-mv = <3300>;
zephyr,acquisition-time = <ADC_ACQ_TIME_DEFAULT>;
zephyr,resolution = <12>;
};
};

50
tests/drivers/adc/adc_rescale/src/main.c
View File

@ -8,6 +8,7 @@
#include <zephyr/drivers/adc/adc_emul.h>
#include <zephyr/drivers/adc/voltage_divider.h>
#include <zephyr/drivers/adc/current_sense_shunt.h>
#include <zephyr/drivers/adc/current_sense_amplifier.h>
#include <zephyr/kernel.h>
#include <zephyr/ztest.h>
@ -16,6 +17,7 @@
#define ADC_TEST_NODE_0 DT_NODELABEL(sensor0)
#define ADC_TEST_NODE_1 DT_NODELABEL(sensor1)
#define ADC_TEST_NODE_2 DT_NODELABEL(sensor2)
/**
* @brief Get ADC emulated device
@ -88,9 +90,9 @@ ZTEST_USER(adc_rescale, test_adc_voltage_divider)
}
/*
* test_adc_current_sensor
* test_adc_current_sense_shunt
*/
static int test_task_current_sensor(void)
static int test_task_current_sense_shunt(void)
{
int ret;
int32_t calculated_current = 0;
@ -122,9 +124,49 @@ static int test_task_current_sensor(void)
return TC_PASS;
}
ZTEST_USER(adc_rescale, test_adc_current_sensor)
ZTEST_USER(adc_rescale, test_adc_current_sense_shunt)
{
zassert_true(test_task_current_sensor() == TC_PASS);
zassert_true(test_task_current_sense_shunt() == TC_PASS);
}
/*
* test_adc_current_sense_amplifier
*/
static int test_task_current_sense_amplifier(void)
{
int ret;
int32_t calculated_current = 0;
int32_t input_mv = 3000;
const struct current_sense_amplifier_dt_spec adc_node_2 =
CURRENT_SENSE_AMPLIFIER_DT_SPEC_GET(ADC_TEST_NODE_2);
ret = init_adc(&adc_node_2.port, input_mv);
zassert_equal(ret, 0, "Setting up of the third channel failed with code %d", ret);
struct adc_sequence sequence = {
.buffer = &calculated_current,
.buffer_size = sizeof(calculated_current),
};
adc_sequence_init_dt(&adc_node_2.port, &sequence);
ret = adc_read(adc_node_2.port.dev, &sequence);
zassert_equal(ret, 0, "adc_read() failed with code %d", ret);
ret = adc_raw_to_millivolts_dt(&adc_node_2.port, &calculated_current);
zassert_equal(ret, 0, "adc_raw_to_millivolts_dt() failed with code %d", ret);
current_sense_amplifier_scale_dt(&adc_node_2, &calculated_current);
zassert_within(calculated_current, input_mv * 2, MV_OUTPUT_EPS,
"%u != %u should have set value", calculated_current,
input_mv * 2);
return TC_PASS;
}
ZTEST_USER(adc_rescale, test_adc_current_sense_amplifier)
{
zassert_true(test_task_current_sense_amplifier() == TC_PASS);
}
void *adc_rescale_setup(void)