mirror of https://github.com/ARMmbed/mbed-os.git
120 lines
3.5 KiB
C++
120 lines
3.5 KiB
C++
/* mbed Microcontroller Library
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* Copyright (c) 2018-2018 ARM Limited
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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 "greentea-client/test_env.h"
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#include "utest/utest.h"
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#include "unity/unity.h"
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#include "rtos/Kernel.h"
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#include "mbed.h"
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using utest::v1::Case;
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#define TEST_REPEAT_COUNT 1000
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#define NUM_WAIT_TICKS 1000
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// all in [us]
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#define ONE_SECOND 1000000
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#define SMALL_DELTA 1500 // 0.15%
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#define BIG_DELTA 15000 // 1.5%
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/** Test if kernel ticker frequency is 1kHz
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Given a RTOS kernel ticker
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When check it frequency
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Then the the frequency is 1kHz
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*/
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void test_frequency()
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{
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uint32_t freq = osKernelGetTickFreq();
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TEST_ASSERT_EQUAL_UINT32_MESSAGE(1000, freq, "Expected SysTick frequency is 1kHz");
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}
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/** Test if kernel ticker increments by one
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Given a RTOS kernel ticker
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When perform subsequent calls of @a rtos::Kernel::get_ms_count
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Then subsequent reads should not differ by more than one
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*/
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void test_increment(void)
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{
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for (uint32_t i = 0; i < TEST_REPEAT_COUNT; i++) {
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const uint64_t start = rtos::Kernel::get_ms_count();
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while (true) {
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uint64_t diff = rtos::Kernel::get_ms_count() - start;
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if (diff != 0) {
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TEST_ASSERT_EQUAL_UINT64(1, diff);
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break;
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}
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}
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}
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}
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/** Test if kernel ticker interval is 1ms
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Given a RTOS kernel ticker
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When perform subsequent calls of @a rtos::Kernel::get_ms_count
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Then the ticker interval should be 1ms
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*/
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void test_interval()
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{
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uint64_t start, stop;
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Timer timer;
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start = rtos::Kernel::get_ms_count();
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// wait for tick
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do {
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stop = rtos::Kernel::get_ms_count();
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} while ((stop - start) == 0);
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timer.start();
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start = stop;
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// wait for NUM_WAIT_TICKS ticks
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do {
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stop = rtos::Kernel::get_ms_count();
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} while ((stop - start) != NUM_WAIT_TICKS);
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timer.stop();
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TEST_ASSERT_EQUAL_UINT64(NUM_WAIT_TICKS, (stop - start));
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#if defined(NO_SYSTICK) || defined(MBED_TICKLESS)
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// On targets with NO_SYSTICK/MBED_TICKLESS enabled, systick is emulated by lp_ticker what makes it less accurate
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// for more details https://os.mbed.com/docs/latest/reference/tickless.html
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TEST_ASSERT_UINT64_WITHIN(BIG_DELTA, ONE_SECOND, timer.read_high_resolution_us());
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#else
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TEST_ASSERT_UINT64_WITHIN(SMALL_DELTA, ONE_SECOND, timer.read_high_resolution_us());
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#endif
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}
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// Test cases
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Case cases[] = {
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Case("Test kernel ticker frequency", test_frequency),
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Case("Test if kernel ticker increments by one", test_increment),
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Case("Test if kernel ticker interval is 1ms", test_interval)
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};
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utest::v1::status_t greentea_test_setup(const size_t number_of_cases)
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{
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GREENTEA_SETUP(10, "timing_drift_auto");
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return utest::v1::greentea_test_setup_handler(number_of_cases);
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}
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utest::v1::Specification specification(greentea_test_setup, cases);
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int main()
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{
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return !utest::v1::Harness::run(specification);
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}
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