main.cpp

00001 /*
00002  * Copyright (c) 2013-2016, 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 
00018 
00019 /*
00020  * Tests is to measure the accuracy of Timeout over a period of time
00021  *
00022  *
00023  * 1) DUT would start to update callback_trigger_count every milli sec
00024  * 2) Host would query what is current count base_time, Device responds by the callback_trigger_count
00025  * 3) Host after waiting for measurement stretch. It will query for device time again final_time.
00026  * 4) Host computes the drift considering base_time, final_time, transport delay and measurement stretch
00027  * 5) Finally host send the results back to device pass/fail based on tolerance.
00028  * 6) More details on tests can be found in timing_drift_auto.py
00029  *
00030  */
00031 
00032 #include "mbed.h"
00033 #include "greentea-client/test_env.h"
00034 #include "utest/utest.h"
00035 #include "unity/unity.h"
00036 
00037 using namespace utest::v1;
00038 
00039 #define PERIOD_US   10000
00040 
00041 volatile int ticker_count = 0;
00042 volatile uint32_t callback_trigger_count = 0;
00043 static const int test_timeout = 240;
00044 Timeout timeout;
00045 
00046 void set_incremeant_count() {
00047     timeout.attach_us(set_incremeant_count, PERIOD_US);
00048     ++callback_trigger_count;
00049 }
00050 
00051 void test_case_timeout() {
00052 
00053     char _key[11] = { };
00054     char _value[128] = { };
00055     int expected_key = 1;
00056     uint8_t results_size = 0;
00057 
00058     greentea_send_kv("timing_drift_check_start", 0);
00059     timeout.attach_us(set_incremeant_count, PERIOD_US);
00060 
00061     // wait for 1st signal from host
00062     do {
00063         greentea_parse_kv(_key, _value, sizeof(_key), sizeof(_value));
00064         expected_key = strcmp(_key, "base_time");
00065     } while (expected_key);
00066 
00067     greentea_send_kv(_key, callback_trigger_count * PERIOD_US);
00068 
00069     // wait for 2nd signal from host
00070     greentea_parse_kv(_key, _value, sizeof(_key), sizeof(_value));
00071     greentea_send_kv(_key, callback_trigger_count * PERIOD_US);
00072 
00073     //get the results from host
00074     greentea_parse_kv(_key, _value, sizeof(_key), sizeof(_value));
00075 
00076     TEST_ASSERT_EQUAL_STRING_MESSAGE("pass", _key,"Host side script reported a fail...");
00077 }
00078 
00079 // Test casess
00080 Case cases[] = { Case("Timers: toggle on/off", test_case_timeout), };
00081 
00082 utest::v1::status_t greentea_test_setup(const size_t number_of_cases) {
00083     GREENTEA_SETUP(test_timeout, "timing_drift_auto");
00084     return greentea_test_setup_handler(number_of_cases);
00085 }
00086 
00087 Specification specification(greentea_test_setup, cases, greentea_test_teardown_handler);
00088 
00089 int main() {
00090     Harness::run(specification);
00091 }