mirror of https://github.com/ARMmbed/mbed-os.git
Add Low Power Timer test.
Przemyslaw Stekiel
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/*
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* Copyright (c) 2017, ARM Limited, All Rights Reserved
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* SPDX-License-Identifier: Apache-2.0
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*
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* Licensed under the Apache License, Version 2.0 (the "License"); you may
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* 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, WITHOUT
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* 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 "mbed.h"
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#include "greentea-client/test_env.h"
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#include "unity.h"
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#include "utest.h"
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#include "rtos.h"
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#include "hal/us_ticker_api.h"
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#if !DEVICE_LOWPOWERTIMER
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#error [NOT_SUPPORTED] test not supported
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#endif
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using namespace utest::v1;
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extern uint32_t SystemCoreClock;
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/* This test is created based on the test for Timer class.
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* Since low power timer is less accurate than regular
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* timer we need to adjust delta.
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*/
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/* Macro to define delta based on CPU clock frequency.
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*
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* Note that some extra time is counted by the timer.
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* Additional time is caused by the function calls and
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* additional operations performed by wait and
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* stop functions before in fact timer is stopped. This may
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* add additional time to the counted result.
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*
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* To take in to account this extra time we introduce DELTA
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* value based on CPU clock (speed):
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* DELTA = TOLERANCE_FACTOR / SystemCoreClock * US_FACTOR
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*
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* e.g.
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* For K64F DELTA = (40000 / 120000000) * 1000000 = 333[us]
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* For NUCLEO_F070RB DELTA = (40000 / 48000000) * 1000000 = 833[us]
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* For NRF51_DK DELTA = (40000 / 16000000) * 1000000 = 2500[us]
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*/
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#define US_PER_SEC 1000000
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#define TOLERANCE_FACTOR 40000.0f
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#define US_FACTOR 1000000.0f
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static const int delta_sys_clk_us = ((int) (TOLERANCE_FACTOR / (float) SystemCoreClock * US_FACTOR));
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#define DELTA_US delta_sys_clk_us
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#define DELTA_S ((float)delta_sys_clk_us/US_PER_SEC)
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#define DELTA_MS 1
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/* This test verifies if low power timer is stopped after
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* creation.
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*
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* Given Timer has been successfully created.
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* When read of timer elapsed time is requested.
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* Then result is always 0.
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*/
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void test_lptimer_creation()
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{
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LowPowerTimer lp_timer;
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/* Check results. */
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TEST_ASSERT_EQUAL_FLOAT(0, lp_timer.read());
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TEST_ASSERT_EQUAL(0, lp_timer.read_ms());
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TEST_ASSERT_EQUAL(0, lp_timer.read_us());
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TEST_ASSERT_EQUAL(0, lp_timer.read_high_resolution_us());
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/* Wait 10 ms.
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* After that operation timer read routines should still return 0. */
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wait_ms(10);
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/* Check results. */
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TEST_ASSERT_EQUAL_FLOAT(0, lp_timer.read());
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TEST_ASSERT_EQUAL(0, lp_timer.read_ms());
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TEST_ASSERT_EQUAL(0, lp_timer.read_us());
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TEST_ASSERT_EQUAL(0, lp_timer.read_high_resolution_us());
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}
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/* This test verifies if read(), read_us(), read_ms(),
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* read_high_resolution_us()
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* functions return time accumulated between
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* low power timer starts and stops.
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*
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* Given Timer has been successfully created and
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* few times started and stopped after a specified period of time.
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* When timer read request is performed.
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* Then read functions return accumulated time elapsed between starts
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* and stops.
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*/
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void test_lptimer_time_accumulation()
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{
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LowPowerTimer lp_timer;
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/* Start the timer. */
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lp_timer.start();
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/* Wait 10 ms. */
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wait_ms(10);
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/* Stop the timer. */
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lp_timer.stop();
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/* Check results - totally 10 ms have elapsed. */
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TEST_ASSERT_FLOAT_WITHIN(DELTA_S, 0.010f, lp_timer.read());
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TEST_ASSERT_INT32_WITHIN(DELTA_MS, 10, lp_timer.read_ms());
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TEST_ASSERT_INT32_WITHIN(DELTA_US, 10000, lp_timer.read_us());
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TEST_ASSERT_UINT64_WITHIN(DELTA_US, 10000, lp_timer.read_high_resolution_us());
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/* Wait 50 ms - this is done to show that time elapsed when
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* the timer is stopped does not have influence on the
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* timer counted time. */
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wait_ms(50);
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/* ------ */
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/* Start the timer. */
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lp_timer.start();
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/* Wait 20 ms. */
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wait_ms(20);
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/* Stop the timer. */
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lp_timer.stop();
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/* Check results - totally 30 ms have elapsed. */
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TEST_ASSERT_FLOAT_WITHIN(2 * DELTA_S, 0.030f, lp_timer.read());
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TEST_ASSERT_INT32_WITHIN(DELTA_MS, 30, lp_timer.read_ms());
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TEST_ASSERT_INT32_WITHIN(2 * DELTA_US, 30000, lp_timer.read_us());
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TEST_ASSERT_UINT64_WITHIN(2 * DELTA_US, 30000, lp_timer.read_high_resolution_us());
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/* Wait 50 ms - this is done to show that time elapsed when
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* the timer is stopped does not have influence on the
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* timer counted time. */
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/* ------ */
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/* Start the timer. */
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lp_timer.start();
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/* Wait 30 ms. */
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wait_ms(30);
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/* Stop the timer. */
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lp_timer.stop();
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/* Check results - totally 60 ms have elapsed. */
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TEST_ASSERT_FLOAT_WITHIN(3 * DELTA_S, 0.060f, lp_timer.read());
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TEST_ASSERT_INT32_WITHIN(DELTA_MS, 60, lp_timer.read_ms());
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TEST_ASSERT_INT32_WITHIN(3 * DELTA_US, 60000, lp_timer.read_us());
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TEST_ASSERT_UINT64_WITHIN(3 * DELTA_US, 60000, lp_timer.read_high_resolution_us());
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/* Wait 50 ms - this is done to show that time elapsed when
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* the timer is stopped does not have influence on the
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* timer time. */
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wait_ms(50);
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/* ------ */
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/* Start the timer. */
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lp_timer.start();
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/* Wait 1 sec. */
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wait_ms(1000);
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/* Stop the timer. */
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lp_timer.stop();
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/* Check results - totally 5060 ms have elapsed. */
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TEST_ASSERT_FLOAT_WITHIN(4 * DELTA_S, 1.060f, lp_timer.read());
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TEST_ASSERT_INT32_WITHIN(DELTA_MS, 1060, lp_timer.read_ms());
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TEST_ASSERT_INT32_WITHIN(4 * DELTA_US, 1060000, lp_timer.read_us());
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TEST_ASSERT_UINT64_WITHIN(4 * DELTA_US, 1060000, lp_timer.read_high_resolution_us());
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}
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/* This test verifies if reset() function resets the
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* low power timer counted time.
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*
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* Given timer has been started and stopped once, then reset
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* operation was performed.
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* When timer is started and stopped next time.
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* Then timer read functions returns only the the second
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* measured time.
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*/
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void test_lptimer_reset()
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{
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LowPowerTimer lp_timer;
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/* First measure 10 ms delay. */
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lp_timer.start();
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/* Wait 10 ms. */
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wait_ms(10);
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/* Stop the timer. */
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lp_timer.stop();
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/* Check results - totally 10 ms elapsed. */
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TEST_ASSERT_FLOAT_WITHIN(DELTA_S, 0.010f, lp_timer.read());
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TEST_ASSERT_INT32_WITHIN(DELTA_MS, 10, lp_timer.read_ms());
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TEST_ASSERT_INT32_WITHIN(DELTA_US, 10000, lp_timer.read_us());
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TEST_ASSERT_UINT64_WITHIN(DELTA_US, 10000, lp_timer.read_high_resolution_us());
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/* Reset the timer - previous measured time should be lost now. */
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lp_timer.reset();
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/* Now measure 20 ms delay. */
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lp_timer.start();
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/* Wait 20 ms. */
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wait_ms(20);
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/* Stop the timer. */
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lp_timer.stop();
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/* Check results - 20 ms elapsed since the reset. */
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TEST_ASSERT_FLOAT_WITHIN(DELTA_S, 0.020f, lp_timer.read());
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TEST_ASSERT_INT32_WITHIN(DELTA_MS, 20, lp_timer.read_ms());
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TEST_ASSERT_INT32_WITHIN(DELTA_US, 20000, lp_timer.read_us());
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TEST_ASSERT_UINT64_WITHIN(DELTA_US, 20000, lp_timer.read_high_resolution_us());
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}
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/* This test verifies if calling start() for already
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* started low power timer does nothing.
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*
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* Given timer is already started.
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* When timer is started again.
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* Then second start operation is ignored.
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*/
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void test_lptimer_start_started_timer()
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{
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LowPowerTimer lp_timer;
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/* Start the timer. */
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lp_timer.start();
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/* Wait 10 ms. */
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wait_ms(10);
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/* Now start timer again. */
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lp_timer.start();
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/* Wait 20 ms. */
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wait_ms(20);
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/* Stop the timer. */
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lp_timer.stop();
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/* Check results - 30 ms have elapsed since the first start. */
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TEST_ASSERT_FLOAT_WITHIN(2 * DELTA_S, 0.030f, lp_timer.read());
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TEST_ASSERT_INT32_WITHIN(DELTA_MS, 30, lp_timer.read_ms());
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TEST_ASSERT_INT32_WITHIN(2 * DELTA_US, 30000, lp_timer.read_us());
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TEST_ASSERT_UINT64_WITHIN(2 * DELTA_US, 30000, lp_timer.read_high_resolution_us());
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}
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/* This test verifies low power timer float operator.
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*
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* Given timer is created and a time period time is counted.
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* When timer object is casted on float type.
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* Then counted type in seconds is returned by means of
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* read() function.
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*/
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void test_lptimer_float_operator()
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{
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LowPowerTimer lp_timer;
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/* Start the timer. */
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lp_timer.start();
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/* Wait 10 ms. */
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wait_ms(10);
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/* Stop the timer. */
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lp_timer.stop();
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/* Check result - 10 ms elapsed. */
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TEST_ASSERT_FLOAT_WITHIN(DELTA_S, 0.010f, (float )(lp_timer));
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}
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/* This test verifies if time counted by the low power timer is
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* valid.
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*
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* Given timer is created.
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* When timer is used to measure 1ms/10ms/100ms/1s
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* delays.
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* Then the results are valid (within acceptable range).
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*/
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template<int wait_val_us>
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void test_lptimer_time_measurement()
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{
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LowPowerTimer lp_timer;
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/* Start the timer. */
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lp_timer.start();
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/* Wait <wait_val_us> us. */
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wait_us(wait_val_us);
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/* Stop the timer. */
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lp_timer.stop();
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/* Check results - wait_val_us us have elapsed. */
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TEST_ASSERT_FLOAT_WITHIN(DELTA_S, (float )wait_val_us / 1000000, lp_timer.read());
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TEST_ASSERT_INT32_WITHIN(DELTA_MS, wait_val_us / 1000, lp_timer.read_ms());
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TEST_ASSERT_INT32_WITHIN(DELTA_US, wait_val_us, lp_timer.read_us());
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TEST_ASSERT_UINT64_WITHIN(DELTA_US, wait_val_us, lp_timer.read_high_resolution_us());
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}
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utest::v1::status_t test_setup(const size_t number_of_cases)
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{
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GREENTEA_SETUP(15, "default_auto");
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return verbose_test_setup_handler(number_of_cases);
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}
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Case cases[] = {
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Case("Test: LowPowerTimer - stopped after creation.", test_lptimer_creation),
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Case("Test: LowPowerTimer - measure time accumulation.", test_lptimer_time_accumulation),
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Case("Test: LowPowerTimer - reset.", test_lptimer_reset),
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Case("Test: LowPowerTimer - start started timer.", test_lptimer_start_started_timer),
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Case("Test: LowPowerTimer - float operator.", test_lptimer_float_operator),
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Case("Test: LowPowerTimer - time measurement 1 ms.", test_lptimer_time_measurement<1000>),
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Case("Test: LowPowerTimer - time measurement 10 ms.", test_lptimer_time_measurement<10000>),
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Case("Test: LowPowerTimer - time measurement 100 ms.", test_lptimer_time_measurement<100000>),
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Case("Test: LowPowerTimer - time measurement 1 s.", test_lptimer_time_measurement<1000000>)
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};
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Specification specification(test_setup, cases);
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int main()
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{
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return !Harness::run(specification);
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}
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