mirror of https://github.com/ARMmbed/mbed-os.git
93 lines
2.8 KiB
C++
93 lines
2.8 KiB
C++
/*
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* Copyright (c) 2013-2017, 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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/*
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* Tests is to measure the accuracy of Thread::wait() over a period of time
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*
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*
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* 1) DUT would start to update callback_trigger_count every milli sec
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* 2) Host would query what is current count base_time, Device responds by the callback_trigger_count
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* 3) Host after waiting for measurement stretch. It will query for device time again final_time.
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* 4) Host computes the drift considering base_time, final_time, transport delay and measurement stretch
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* 5) Finally host send the results back to device pass/fail based on tolerance.
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* 6) More details on tests can be found in timing_drift_auto.py
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*
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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 "rtos.h"
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#include "unity/unity.h"
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#if defined(MBED_RTOS_SINGLE_THREAD)
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#error [NOT_SUPPORTED] test not supported
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#endif
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#define TEST_STACK_SIZE 1024
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#define ONE_MILLI_SEC 1000
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volatile uint32_t callback_trigger_count = 0;
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static const int test_timeout = 240;
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bool test_result = false;
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void update_tick_thread() {
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while (true) {
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Thread::wait(1);
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++callback_trigger_count;
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}
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}
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void gt_comm_wait_thread() {
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char _key[11] = { };
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char _value[128] = { };
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int expected_key = 1;
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greentea_send_kv("timing_drift_check_start", 0);
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// wait for 1st signal from host
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do {
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greentea_parse_kv(_key, _value, sizeof(_key), sizeof(_value));
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expected_key = strcmp(_key, "base_time");
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} while (expected_key);
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greentea_send_kv(_key, callback_trigger_count * ONE_MILLI_SEC);
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// wait for 2nd signal from host
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greentea_parse_kv(_key, _value, sizeof(_key), sizeof(_value));
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greentea_send_kv(_key, callback_trigger_count * ONE_MILLI_SEC);
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//get the results from host
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greentea_parse_kv(_key, _value, sizeof(_key), sizeof(_value));
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if (strcmp("pass", _key) == 0) {
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test_result = true;
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}
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}
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int main() {
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GREENTEA_SETUP(test_timeout, "timing_drift_auto");
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Thread tick_thread(osPriorityHigh, TEST_STACK_SIZE);
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Thread gt_conn_thread(osPriorityNormal, TEST_STACK_SIZE);
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tick_thread.start(update_tick_thread);
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gt_conn_thread.start(gt_comm_wait_thread);
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gt_conn_thread.join();
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GREENTEA_TESTSUITE_RESULT(test_result);
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}
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