Mbed OS Reference | timeout_tests.h Source File

 /* mbed Microcontroller Library
  * Copyright (c) 2017 ARM Limited
  *
  * 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.
  */
 #ifndef MBED_TIMEOUT_TESTS_H
 #define MBED_TIMEOUT_TESTS_H
 
 #include "mbed.h"
 #include "unity/unity.h"
 
 #define NUM_TIMEOUTS 16
 #define DRIFT_TEST_PERIOD_US 10000
 
 const float TEST_DELAY_S = 0.01;
 const uint32_t TEST_DELAY_MS = 1000.0F * TEST_DELAY_S;
 const us_timestamp_t TEST_DELAY_US = 1000000.0F * TEST_DELAY_S;
 
 /* Timeouts are quite arbitrary due to large number of boards with varying level of accuracy */
 #define LONG_DELTA_US (100000)
 #define SHORT_DELTA_US (2000)
 
 void sem_callback(Semaphore *sem)
 {
     sem->release();
 }
 
 void cnt_callback(volatile uint32_t *cnt)
 {
     (*cnt)++;
 }
 
 template<typename TimeoutType>
 class AttachTester: public TimeoutType {
 public:
     void attach_callback(Callback<void()> func, us_timestamp_t delay_us)
     {
         TimeoutType::attach(func, (float) delay_us / 1000000.0f);
     }
 };
 
 template<typename TimeoutType>
 class AttachUSTester: public TimeoutType {
 public:
     void attach_callback(Callback<void()> func, us_timestamp_t delay_us)
     {
         TimeoutType::attach_us(func, delay_us);
     }
 };
 
 /** Template for tests: callback called once
  *
  * Test callback called once
  * Given a Timeout object with a callback attached with @a attach()
  * When given time elapses
  * Then the callback is called exactly one time
  *
  * Test callback called once
  * Given a Timeout object with a callback attached with @a attach_us()
  * When given time elapses
  * Then the callback is called exactly one time
  */
 template<typename T>
 void test_single_call(void)
 {
     Semaphore sem(0, 1);
     T timeout;
 
     timeout.attach_callback(mbed::callback(sem_callback, &sem), TEST_DELAY_US);
 
     bool acquired = sem.try_acquire();
     TEST_ASSERT_FALSE(acquired);
 
     acquired = sem.try_acquire_for(TEST_DELAY_MS + 2);
     TEST_ASSERT_TRUE(acquired);
 
     acquired = sem.try_acquire_for(TEST_DELAY_MS + 2);
     TEST_ASSERT_FALSE(acquired);
 
     timeout.detach();
 }
 
 /** Template for tests: callback not called when cancelled
  *
  * Test callback not called when cancelled
  * Given a Timeout object with a callback attached with @a attach()
  * When the callback is detached before being called
  * Then the callback is never called
  *
  * Test callback not called when cancelled
  * Given a Timeout object with a callback attached with @a attach_us()
  * When the callback is detached before being called
  * Then the callback is never called
  */
 template<typename T>
 void test_cancel(void)
 {
     Semaphore sem(0, 1);
     T timeout;
 
     timeout.attach_callback(mbed::callback(sem_callback, &sem), 2.0f * TEST_DELAY_US);
 
     bool acquired = sem.try_acquire_for(TEST_DELAY_MS);
     TEST_ASSERT_FALSE(acquired);
     timeout.detach();
 
     acquired = sem.try_acquire_for(TEST_DELAY_MS + 2);
     TEST_ASSERT_FALSE(acquired);
 }
 
 /** Template for tests: callback override
  *
  * Test callback override
  * Given a Timeout object with a callback attached with @a attach()
  * When another callback is attached before first one is called
  *     and second callback's delay elapses
  * Then the second callback is called
  *     and the first callback is never called
  *
  * Test callback override
  * Given a Timeout object with a callback attached with @a attach_us()
  * When another callback is attached before first one is called
  *     and second callback's delay elapses
  * Then the second callback is called
  *     and the first callback is never called
  */
 template<typename T>
 void test_override(void)
 {
     Semaphore sem1(0, 1);
     Semaphore sem2(0, 1);
     T timeout;
 
     timeout.attach_callback(mbed::callback(sem_callback, &sem1), 2.0f * TEST_DELAY_US);
 
     bool acquired = sem1.try_acquire_for(TEST_DELAY_MS);
     TEST_ASSERT_FALSE(acquired);
     timeout.attach_callback(mbed::callback(sem_callback, &sem2), 2.0f * TEST_DELAY_US);
 
     acquired = sem2.try_acquire_for(2 * TEST_DELAY_MS + 2);
     TEST_ASSERT_TRUE(acquired);
     acquired = sem1.try_acquire();
     TEST_ASSERT_FALSE(acquired);
 
     timeout.detach();
 }
 
 /** Template for tests: multiple Timeouts
  *
  * Test multiple Timeouts
  * Given multiple separate Timeout objects
  * When a callback is attached to all of these Timeout objects with @a attach()
  *     and delay for every Timeout elapses
  * Then all callbacks are called
  *
  * Test multiple Timeouts
  * Given multiple separate Timeout objects
  * When a callback is attached to all of these Timeout objects with @a attach_us()
  *     and delay for every Timeout elapses
  * Then all callbacks are called
  */
 template<typename T>
 void test_multiple(void)
 {
     volatile uint32_t callback_count = 0;
     T timeouts[NUM_TIMEOUTS];
     for (size_t i = 0; i < NUM_TIMEOUTS; i++) {
         timeouts[i].attach_callback(mbed::callback(cnt_callback, &callback_count), TEST_DELAY_US);
     }
     ThisThread::sleep_for(TEST_DELAY_MS + 2);
     TEST_ASSERT_EQUAL(NUM_TIMEOUTS, callback_count);
 }
 
 /** Template for tests: zero delay
  *
  * Test zero delay
  * Given a Timeout object
  * When a callback is attached with 0.0 s delay, with @a attach()
  * Then the callback is called instantly
  *
  * Test zero delay
  * Given a Timeout object
  * When a callback is attached with 0.0 s delay, with @a attach_us()
  * Then the callback is called instantly
  */
 template<typename T>
 void test_no_wait(void)
 {
     for (int i = 0; i < 100; i++) {
         Semaphore sem(0, 1);
         T timeout;
         timeout.attach_callback(mbed::callback(sem_callback, &sem), 0ULL);
         int32_t sem_slots = sem.wait(0);
         TEST_ASSERT_EQUAL(1, sem_slots);
         timeout.detach();
     }
 }
 
 /** Template for tests: accuracy of timeout delay
  *
  * Test delay accuracy
  * Given a Timeout object with a callback attached with @a attach()
  * When the callback is called
  * Then elapsed time matches given delay
  *
  * Test delay accuracy
  * Given a Timeout object with a callback attached with @a attach_us()
  * When the callback is called
  * Then elapsed time matches given delay
  */
 template<typename T, us_timestamp_t delay_us, us_timestamp_t delta_us>
 void test_delay_accuracy(void)
 {
     Semaphore sem(0, 1);
     T timeout;
     Timer timer;
 
     timer.start();
     timeout.attach_callback(mbed::callback(sem_callback, &sem), delay_us);
 
     sem.acquire();
     timer.stop();
     TEST_ASSERT_UINT64_WITHIN(delta_us, delay_us, timer.read_high_resolution_us());
 
     timeout.detach();
 }
 
 #if DEVICE_SLEEP
 /** Template for tests: timeout during sleep
  *
  * Test timeout during sleep
  * Given a Timeout object with a callback attached with @a attach()
  *     and the uC in a sleep mode
  * When given delay elapses
  * Then the callback is called
  *     and elapsed time matches given delay
  *
  * Test timeout during sleep
  * Given a Timeout object with a callback attached with @a attach_us()
  *     and the uC in a sleep mode
  * When given delay elapses
  * Then the callback is called
  *     and elapsed time matches given delay
  */
 template<typename T, us_timestamp_t delay_us, us_timestamp_t delta_us>
 void test_sleep(void)
 {
     Semaphore sem(0, 1);
     T timeout;
     Timer timer;
 
     sleep_manager_lock_deep_sleep();
     timer.start();
     timeout.attach_callback(mbed::callback(sem_callback, &sem), delay_us);
 
     bool deep_sleep_allowed = sleep_manager_can_deep_sleep_test_check();
     TEST_ASSERT_FALSE_MESSAGE(deep_sleep_allowed, "Deep sleep should be disallowed");
     sem.acquire();
     timer.stop();
 
     sleep_manager_unlock_deep_sleep();
     TEST_ASSERT_UINT64_WITHIN(delta_us, delay_us, timer.read_high_resolution_us());
 
     timeout.detach();
 }
 
 #if DEVICE_LPTICKER
 /** Template for tests: timeout during deepsleep
  *
  * Test timeout during deepsleep
  * Given a LowPowerTimeout object with a callback attached with @a attach()
  *     and the uC in a deepsleep mode
  * When given delay elapses
  * Then the callback is called
  *     and elapsed time matches given delay
  *
  * Test timeout during deepsleep
  * Given a LowPowerTimeout object with a callback attached with @a attach_us()
  *     and the uC in a deepsleep mode
  * When given delay elapses
  * Then the callback is called
  *     and elapsed time matches given delay
  */
 template<typename T, us_timestamp_t delay_us, us_timestamp_t delta_us>
 void test_deepsleep(void)
 {
     Semaphore sem(0, 1);
     T timeout;
     /*
      * We use here the low power timer instead of microsecond timer for start and
      * end because the microseconds timer might be disabled during deepsleep.
      */
     LowPowerTimer timer;
 
     /*
      * Since deepsleep() may shut down the UART peripheral, we wait for 20ms
      * to allow for hardware serial buffers to completely flush.
      *
      * Take NUMAKER_PFM_NUC472 as an example:
      * Its UART peripheral has 16-byte Tx FIFO. With baud rate set to 9600, flush
      * Tx FIFO would take: 16 * 8 * 1000 / 9600 = 13.3 (ms). So set wait time to
      * 20ms here for safe.
 
      * This should be replaced with a better function that checks if the
      * hardware buffers are empty. However, such an API does not exist now,
      * so we'll use the ThisThread::sleep_for() function for now.
      */
     ThisThread::sleep_for(20);
 
     timer.start();
     timeout.attach_callback(mbed::callback(sem_callback, &sem), delay_us);
 
     bool deep_sleep_allowed = sleep_manager_can_deep_sleep_test_check();
     TEST_ASSERT_TRUE_MESSAGE(deep_sleep_allowed, "Deep sleep should be allowed");
     sem.acquire();
     timer.stop();
 
     TEST_ASSERT_UINT64_WITHIN(delta_us, delay_us, timer.read_high_resolution_us());
 
     timeout.detach();
 }
 #endif
 #endif
 
 template<typename TimeoutTesterType>
 class TimeoutDriftTester {
 public:
     TimeoutDriftTester(us_timestamp_t period = 1000) :
         _callback_count(0), _period(period), _timeout()
     {
     }
 
     void reschedule_callback(void)
     {
         _timeout.attach_callback(mbed::callback(this, &TimeoutDriftTester::reschedule_callback), _period);
         _callback_count++;
     }
 
     void detach_callback(void)
     {
         _timeout.detach();
     }
 
     uint32_t get_callback_count(void)
     {
         return _callback_count;
     }
 
 private:
     volatile uint32_t _callback_count;
     us_timestamp_t _period;
     TimeoutTesterType _timeout;
 };
 
 /** Template for tests: accuracy of timeout delay scheduled repeatedly
  *
  * Test time drift -- device part
  * Given a Timeout object with a callback repeatedly attached with @a attach()
  * When the testing host computes test duration based on values received from uC
  * Then computed time and actual time measured by host are equal within given tolerance
  *
  * Test time drift -- device part
  * Given a Timeout object with a callback repeatedly attached with @a attach_us()
  * When the testing host computes test duration based on values received from uC
  * Then computed time and actual time measured by host are equal within given tolerance
  *
  * Original description:
  * 1) DUT would start to update callback_trigger_count every milli sec
  * 2) Host would query what is current count base_time, Device responds by the callback_trigger_count
  * 3) Host after waiting for measurement stretch. It will query for device time again final_time.
  * 4) Host computes the drift considering base_time, final_time, transport delay and measurement stretch
  * 5) Finally host send the results back to device pass/fail based on tolerance.
  * 6) More details on tests can be found in timing_drift_auto.py
  */
 template<typename T>
 void test_drift(void)
 {
     char _key[11] = { };
     char _value[128] = { };
     int expected_key = 1;
     TimeoutDriftTester<T> timeout(DRIFT_TEST_PERIOD_US);
 
     greentea_send_kv("timing_drift_check_start", 0);
     timeout.reschedule_callback();
 
     // wait for 1st signal from host
     do {
         greentea_parse_kv(_key, _value, sizeof(_key), sizeof(_value));
         expected_key = strcmp(_key, "base_time");
     } while (expected_key);
 
     greentea_send_kv(_key, timeout.get_callback_count() * DRIFT_TEST_PERIOD_US);
 
     // wait for 2nd signal from host
     greentea_parse_kv(_key, _value, sizeof(_key), sizeof(_value));
     greentea_send_kv(_key, timeout.get_callback_count() * DRIFT_TEST_PERIOD_US);
 
     timeout.detach_callback();
 
     //get the results from host
     greentea_parse_kv(_key, _value, sizeof(_key), sizeof(_value));
 
     TEST_ASSERT_EQUAL_STRING_MESSAGE("pass", _key, "Host script reported a failure");
 }
 
 #endif
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