main.cpp

00001 /*
00002  * Copyright (c) 2013-2017, ARM Limited, All Rights Reserved
00003  * SPDX-License-Identifier: Apache-2.0
00004  *
00005  * Licensed under the Apache License, Version 2.0 (the "License"); you may
00006  * not use this file except in compliance with the License.
00007  * You may obtain a copy of the License at
00008  *
00009  * http://www.apache.org/licenses/LICENSE-2.0
00010  *
00011  * Unless required by applicable law or agreed to in writing, software
00012  * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
00013  * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
00014  * See the License for the specific language governing permissions and
00015  * limitations under the License.
00016  */
00017 #include "mbed.h"
00018 #include "greentea-client/test_env.h"
00019 #include "utest/utest.h"
00020 #include "unity/unity.h"
00021 
00022 #if defined(MBED_RTOS_SINGLE_THREAD)
00023 #error [NOT_SUPPORTED] test not supported
00024 #endif
00025 
00026 #if !DEVICE_USTICKER
00027 #error [NOT_SUPPORTED] test not supported
00028 #endif
00029 
00030 //FastModels not support time drifting test
00031 #if defined(__ARM_FM)
00032 #error [NOT_SUPPORTED] test not supported
00033 #endif
00034 
00035 using utest::v1::Case;
00036 
00037 #if defined(__CORTEX_M23) || defined(__CORTEX_M33)
00038 #define TEST_STACK_SIZE 512
00039 #else
00040 #define TEST_STACK_SIZE 256
00041 #endif
00042 #define ONE_MILLI_SEC 1000
00043 
00044 volatile uint32_t elapsed_time_ms = 0;
00045 static const int test_timeout = 40;
00046 
00047 
00048 void update_tick_thread(Mutex *mutex)
00049 {
00050     while (true) {
00051         Thread::wait(1);
00052         mutex->lock();
00053         ++elapsed_time_ms;
00054         mutex->unlock();
00055     }
00056 }
00057 
00058 
00059 /** Tests is to measure the accuracy of Thread::wait() over a period of time
00060 
00061     Given
00062         a thread updating elapsed_time_ms every milli sec
00063         and host script for time measurement accuracy check (More details on tests can be found in timing_drift_auto.py)
00064     When host query what is current count base_time
00065     Then Device responds by the elapsed_time_ms
00066     When host query what is current count final_time
00067     Then Device responds by the elapsed_time_ms
00068     When host computes the drift considering base_time, final_time, transport delay and measurement stretch
00069     Then host send the results back to device pass/fail based on tolerance
00070  */
00071 void test(void)
00072 {
00073     char _key[11] = { };
00074     char _value[128] = { };
00075     int expected_key = 1;
00076     Mutex mutex;
00077     uint32_t elapsed_time;
00078 
00079     Thread tick_thread(osPriorityHigh, TEST_STACK_SIZE);
00080     tick_thread.start(callback(update_tick_thread, &mutex));
00081 
00082     greentea_send_kv("timing_drift_check_start", 0);
00083 
00084     // wait for 1st signal from host
00085     do {
00086         greentea_parse_kv(_key, _value, sizeof(_key), sizeof(_value));
00087         expected_key = strcmp(_key, "base_time");
00088     } while (expected_key);
00089 
00090     mutex.lock();
00091     elapsed_time = elapsed_time_ms;
00092     mutex.unlock();
00093     // send base_time
00094     greentea_send_kv(_key, elapsed_time * ONE_MILLI_SEC);
00095 
00096     // wait for 2nd signal from host
00097     greentea_parse_kv(_key, _value, sizeof(_key), sizeof(_value));
00098 
00099     mutex.lock();
00100     elapsed_time = elapsed_time_ms;
00101     mutex.unlock();
00102     // send final_time
00103     greentea_send_kv(_key, elapsed_time * ONE_MILLI_SEC);
00104 
00105     //get the results from host
00106     greentea_parse_kv(_key, _value, sizeof(_key), sizeof(_value));
00107 
00108     TEST_ASSERT_EQUAL_STRING_MESSAGE("pass", _key, "Host side script reported a fail...");
00109 }
00110 
00111 Case cases[] = {
00112     Case("Test Thread::wait accuracy", test)
00113 };
00114 
00115 utest::v1::status_t greentea_test_setup(const size_t number_of_cases)
00116 {
00117     GREENTEA_SETUP(test_timeout, "timing_drift_auto");
00118     return utest::v1::greentea_test_setup_handler(number_of_cases);
00119 }
00120 
00121 utest::v1::Specification specification(greentea_test_setup, cases);
00122 
00123 int main()
00124 {
00125     utest::v1::Harness::run(specification);
00126 }