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99 lines
3.5 KiB
C
99 lines
3.5 KiB
C
/*
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* Copyright 2024 Google LLC
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include "clar.h"
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#include "drivers/battery.h"
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static uint32_t prv_convert_millivolts_to_12bit_reading(int millivolts) {
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return 4095 * millivolts / 1800;
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}
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#define VREF_VOLTAGE 1200
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void test_battery__reading_conversion_boring(void) {
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ADCVoltageMonitorReading reading = {
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.vref_total = prv_convert_millivolts_to_12bit_reading(VREF_VOLTAGE),
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.vmon_total = prv_convert_millivolts_to_12bit_reading(1800)
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};
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uint32_t result = battery_convert_reading_to_millivolts(reading, 1, 1);
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cl_assert_equal_i(result, 1800);
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reading.vmon_total = prv_convert_millivolts_to_12bit_reading(1200);
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result = battery_convert_reading_to_millivolts(reading, 1, 1);
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cl_assert_equal_i(result, 1200);
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reading.vmon_total = prv_convert_millivolts_to_12bit_reading(0);
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result = battery_convert_reading_to_millivolts(reading, 1, 1);
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cl_assert_equal_i(result, 0);
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}
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void test_battery__reading_conversion_40_samples(void) {
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ADCVoltageMonitorReading reading = {
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.vref_total = prv_convert_millivolts_to_12bit_reading(VREF_VOLTAGE) * 40,
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.vmon_total = prv_convert_millivolts_to_12bit_reading(1800) * 40
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};
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uint32_t result = battery_convert_reading_to_millivolts(reading, 1, 1);
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cl_assert_equal_i(result, 1800);
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reading.vmon_total = prv_convert_millivolts_to_12bit_reading(1200) * 40;
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result = battery_convert_reading_to_millivolts(reading, 1, 1);
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cl_assert_equal_i(result, 1200);
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reading.vmon_total = prv_convert_millivolts_to_12bit_reading(0);
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result = battery_convert_reading_to_millivolts(reading, 1, 1);
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cl_assert_equal_i(result, 0);
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}
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// Make sure our new method for calculating battery usage matches the old one for stm32f2
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///////////////////////////////////////////////////////////
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static int prv_legacy_f2_calculation_millivolts(ADCVoltageMonitorReading reading) {
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return (int) ((reading.vmon_total * (2730) / reading.vref_total) * 295) / 256;
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}
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void test_battery__reading_conversion_f2(void) {
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ADCVoltageMonitorReading reading = {
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.vref_total = prv_convert_millivolts_to_12bit_reading(VREF_VOLTAGE),
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.vmon_total = prv_convert_millivolts_to_12bit_reading(1800)
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};
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uint32_t result = battery_convert_reading_to_millivolts(reading, 3599, 1373);
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cl_assert_equal_i(result, prv_legacy_f2_calculation_millivolts(reading));
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}
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// Make sure our new method for calculating battery usage matches the old one for stm32f4
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///////////////////////////////////////////////////////////
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static int prv_legacy_f4_calculation_millivolts(ADCVoltageMonitorReading reading) {
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return (int) (((reading.vmon_total * (2730) / reading.vref_total) * 120) / 91);
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}
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void test_battery__reading_conversion_f4(void) {
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ADCVoltageMonitorReading reading = {
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.vref_total = prv_convert_millivolts_to_12bit_reading(VREF_VOLTAGE),
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.vmon_total = prv_convert_millivolts_to_12bit_reading(1800)
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};
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uint32_t result = battery_convert_reading_to_millivolts(reading, 3, 1);
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cl_assert_equal_i(result, prv_legacy_f4_calculation_millivolts(reading));
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}
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