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Import of the watch repository from Pebble

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Matthieu Jeanson 2024-12-12 16:43:03 -08:00 • committed by Katharine Berry
commit 3b92768480
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tests/fw/drivers/test_rtc_calibration.c Normal file
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/*
* Copyright 2024 Google LLC
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include "drivers/stm32f2/rtc_calibration.h"
#include "clar.h"
// Stubs and stuff
#include "stubs_logging.h"
#include "mcu.h"
#define TARGET_FREQUENCY_mHZ (32768 * 1000)
#define ALTERNATE_FREQUENCY_mHZ (1000000 * 1000)
// Tests
void test_rtc_calibration__no_calibration_required(void) {
RTCCalibConfig config = rtc_calibration_get_config(32768000, TARGET_FREQUENCY_mHZ);
cl_assert_equal_i(config.units, 0);
}
void test_rtc_calibration__slightly_slow_but_not_enough_to_calibrate(void) {
// Approximately -2.01ppm
RTCCalibConfig config = rtc_calibration_get_config(32767934, TARGET_FREQUENCY_mHZ);
cl_assert_equal_i(config.units, 0);
}
void test_rtc_calibration__just_slow_enough_to_calibrate(void) {
// Approximately -2.04ppm
RTCCalibConfig config = rtc_calibration_get_config(32767933, TARGET_FREQUENCY_mHZ);
cl_assert_equal_i(config.units, 1);
cl_assert_equal_i(config.sign, RTC_CalibSign_Positive);
}
void test_rtc_calibration__slightly_fast_but_not_enough_to_calibrate(void) {
// Approximately +1.01ppm
RTCCalibConfig config = rtc_calibration_get_config(32768033, TARGET_FREQUENCY_mHZ);
cl_assert_equal_i(config.units, 0);
}
void test_rtc_calibration__just_fast_enough_to_calibrate(void) {
// Approximately +1.04ppm
RTCCalibConfig config = rtc_calibration_get_config(32768034, TARGET_FREQUENCY_mHZ);
cl_assert_equal_i(config.units, 1);
cl_assert_equal_i(config.sign, RTC_CalibSign_Negative);
}
void test_rtc_calibration__out_of_bounds_slow(void) {
// Approximately -130ppm
RTCCalibConfig config = rtc_calibration_get_config(32763740, TARGET_FREQUENCY_mHZ);
cl_assert_equal_i(config.units, 31);
cl_assert_equal_i(config.sign, RTC_CalibSign_Positive);
}
void test_rtc_calibration__out_of_bounds_fast(void) {
// Approximately +70ppm
RTCCalibConfig config = rtc_calibration_get_config(32770294, TARGET_FREQUENCY_mHZ);
cl_assert_equal_i(config.units, 31);
cl_assert_equal_i(config.sign, RTC_CalibSign_Negative);
}
void test_rtc_calibration__different_target_frequency_not_fast_enough(void) {
// Approximately +1.017ppm
RTCCalibConfig config = rtc_calibration_get_config(1000001017, ALTERNATE_FREQUENCY_mHZ);
cl_assert_equal_i(config.units, 0);
}
void test_rtc_calibration__different_target_frequency_just_fast_enough(void) {
// Approximately +1.018ppm
RTCCalibConfig config = rtc_calibration_get_config(1000001018, ALTERNATE_FREQUENCY_mHZ);
cl_assert_equal_i(config.units, 1);
cl_assert_equal_i(config.sign, RTC_CalibSign_Negative);
}
void test_rtc_calibration__invalid_frequency(void) {
// Bigboards don't have a frequency stored in their mfg info registry.
RTCCalibConfig config = rtc_calibration_get_config(0, TARGET_FREQUENCY_mHZ);
cl_assert_equal_i(config.units, 0);
}