takashi kadono / Mbed OS Nucleo446_SSD1331

Important changes to repositories hosted on mbed.com

Mbed hosted mercurial repositories are deprecated and are due to be permanently deleted in July 2026.

To keep a copy of this software download the repository Zip archive or clone locally using Mercurial.

It is also possible to export all your personal repositories from the account settings page.

Dependencies:   ssd1331

mbed-os/TESTS/events/timing/main.cpp@0:8fdf9a60065b, 2018-10-10 (annotated)

Committer:
kadonotakashi
Date:
Wed Oct 10 00:33:53 2018 +0000
Revision:
0:8fdf9a60065b
how to make mbed librry

Who changed what in which revision?

UserRevisionLine numberNew contents of line
kadonotakashi 0:8fdf9a60065b 1 /* mbed Microcontroller Library
kadonotakashi 0:8fdf9a60065b 2 * Copyright (c) 2017 ARM Limited
kadonotakashi 0:8fdf9a60065b 3 *
kadonotakashi 0:8fdf9a60065b 4 * Licensed under the Apache License, Version 2.0 (the "License");
kadonotakashi 0:8fdf9a60065b 5 * you may not use this file except in compliance with the License.
kadonotakashi 0:8fdf9a60065b 6 * You may obtain a copy of the License at
kadonotakashi 0:8fdf9a60065b 7 *
kadonotakashi 0:8fdf9a60065b 8 * http://www.apache.org/licenses/LICENSE-2.0
kadonotakashi 0:8fdf9a60065b 9 *
kadonotakashi 0:8fdf9a60065b 10 * Unless required by applicable law or agreed to in writing, software
kadonotakashi 0:8fdf9a60065b 11 * distributed under the License is distributed on an "AS IS" BASIS,
kadonotakashi 0:8fdf9a60065b 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
kadonotakashi 0:8fdf9a60065b 13 * See the License for the specific language governing permissions and
kadonotakashi 0:8fdf9a60065b 14 * limitations under the License.
kadonotakashi 0:8fdf9a60065b 15 */
kadonotakashi 0:8fdf9a60065b 16 #include "mbed_events.h"
kadonotakashi 0:8fdf9a60065b 17 #include "mbed.h"
kadonotakashi 0:8fdf9a60065b 18 #include "rtos.h"
kadonotakashi 0:8fdf9a60065b 19 #include "greentea-client/test_env.h"
kadonotakashi 0:8fdf9a60065b 20 #include "unity.h"
kadonotakashi 0:8fdf9a60065b 21 #include "utest.h"
kadonotakashi 0:8fdf9a60065b 22 #include <cstdlib>
kadonotakashi 0:8fdf9a60065b 23 #include <cmath>
kadonotakashi 0:8fdf9a60065b 24
kadonotakashi 0:8fdf9a60065b 25 using namespace utest::v1;
kadonotakashi 0:8fdf9a60065b 26
kadonotakashi 0:8fdf9a60065b 27 #if !DEVICE_USTICKER
kadonotakashi 0:8fdf9a60065b 28 #error [NOT_SUPPORTED] test not supported
kadonotakashi 0:8fdf9a60065b 29 #endif
kadonotakashi 0:8fdf9a60065b 30
kadonotakashi 0:8fdf9a60065b 31 // Test delay
kadonotakashi 0:8fdf9a60065b 32 #ifndef TEST_EVENTS_TIMING_TIME
kadonotakashi 0:8fdf9a60065b 33 #define TEST_EVENTS_TIMING_TIME 20000
kadonotakashi 0:8fdf9a60065b 34 #endif
kadonotakashi 0:8fdf9a60065b 35
kadonotakashi 0:8fdf9a60065b 36 #ifndef TEST_EVENTS_TIMING_MEAN
kadonotakashi 0:8fdf9a60065b 37 #define TEST_EVENTS_TIMING_MEAN 25
kadonotakashi 0:8fdf9a60065b 38 #endif
kadonotakashi 0:8fdf9a60065b 39
kadonotakashi 0:8fdf9a60065b 40 #ifndef M_PI
kadonotakashi 0:8fdf9a60065b 41 #define M_PI 3.14159265358979323846264338327950288
kadonotakashi 0:8fdf9a60065b 42 #endif
kadonotakashi 0:8fdf9a60065b 43
kadonotakashi 0:8fdf9a60065b 44 // Random number generation to skew timing values
kadonotakashi 0:8fdf9a60065b 45 float gauss(float mu, float sigma)
kadonotakashi 0:8fdf9a60065b 46 {
kadonotakashi 0:8fdf9a60065b 47 float x = (float)rand() / ((float)RAND_MAX + 1);
kadonotakashi 0:8fdf9a60065b 48 float y = (float)rand() / ((float)RAND_MAX + 1);
kadonotakashi 0:8fdf9a60065b 49 float x2pi = x * 2.0 * M_PI;
kadonotakashi 0:8fdf9a60065b 50 float g2rad = sqrt(-2.0 * log(1.0 - y));
kadonotakashi 0:8fdf9a60065b 51 float z = cos(x2pi) * g2rad;
kadonotakashi 0:8fdf9a60065b 52 return mu + z * sigma;
kadonotakashi 0:8fdf9a60065b 53 }
kadonotakashi 0:8fdf9a60065b 54
kadonotakashi 0:8fdf9a60065b 55 float chisq(float sigma)
kadonotakashi 0:8fdf9a60065b 56 {
kadonotakashi 0:8fdf9a60065b 57 return pow(gauss(0, sqrt(sigma)), 2);
kadonotakashi 0:8fdf9a60065b 58 }
kadonotakashi 0:8fdf9a60065b 59
kadonotakashi 0:8fdf9a60065b 60
kadonotakashi 0:8fdf9a60065b 61 Timer timer;
kadonotakashi 0:8fdf9a60065b 62 DigitalOut led(LED1);
kadonotakashi 0:8fdf9a60065b 63
kadonotakashi 0:8fdf9a60065b 64 equeue_sema_t sema;
kadonotakashi 0:8fdf9a60065b 65
kadonotakashi 0:8fdf9a60065b 66 // Timer timing test
kadonotakashi 0:8fdf9a60065b 67 void timer_timing_test()
kadonotakashi 0:8fdf9a60065b 68 {
kadonotakashi 0:8fdf9a60065b 69 timer.reset();
kadonotakashi 0:8fdf9a60065b 70 timer.start();
kadonotakashi 0:8fdf9a60065b 71 int prev = timer.read_us();
kadonotakashi 0:8fdf9a60065b 72
kadonotakashi 0:8fdf9a60065b 73 while (prev < TEST_EVENTS_TIMING_TIME * 1000) {
kadonotakashi 0:8fdf9a60065b 74 int next = timer.read_us();
kadonotakashi 0:8fdf9a60065b 75 if (next < prev) {
kadonotakashi 0:8fdf9a60065b 76 printf("backwards drift %d -> %d (%08x -> %08x)\r\n",
kadonotakashi 0:8fdf9a60065b 77 prev, next, prev, next);
kadonotakashi 0:8fdf9a60065b 78 }
kadonotakashi 0:8fdf9a60065b 79 TEST_ASSERT(next >= prev);
kadonotakashi 0:8fdf9a60065b 80 prev = next;
kadonotakashi 0:8fdf9a60065b 81 }
kadonotakashi 0:8fdf9a60065b 82 }
kadonotakashi 0:8fdf9a60065b 83
kadonotakashi 0:8fdf9a60065b 84 // equeue tick timing test
kadonotakashi 0:8fdf9a60065b 85 void tick_timing_test()
kadonotakashi 0:8fdf9a60065b 86 {
kadonotakashi 0:8fdf9a60065b 87 unsigned start = equeue_tick();
kadonotakashi 0:8fdf9a60065b 88 int prev = 0;
kadonotakashi 0:8fdf9a60065b 89
kadonotakashi 0:8fdf9a60065b 90 while (prev < TEST_EVENTS_TIMING_TIME) {
kadonotakashi 0:8fdf9a60065b 91 int next = equeue_tick() - start;
kadonotakashi 0:8fdf9a60065b 92 if (next < prev) {
kadonotakashi 0:8fdf9a60065b 93 printf("backwards drift %d -> %d (%08x -> %08x)\r\n",
kadonotakashi 0:8fdf9a60065b 94 prev, next, prev, next);
kadonotakashi 0:8fdf9a60065b 95 }
kadonotakashi 0:8fdf9a60065b 96 TEST_ASSERT(next >= prev);
kadonotakashi 0:8fdf9a60065b 97 prev = next;
kadonotakashi 0:8fdf9a60065b 98 }
kadonotakashi 0:8fdf9a60065b 99 }
kadonotakashi 0:8fdf9a60065b 100
kadonotakashi 0:8fdf9a60065b 101 // equeue semaphore timing test
kadonotakashi 0:8fdf9a60065b 102 void semaphore_timing_test()
kadonotakashi 0:8fdf9a60065b 103 {
kadonotakashi 0:8fdf9a60065b 104 srand(0);
kadonotakashi 0:8fdf9a60065b 105 timer.reset();
kadonotakashi 0:8fdf9a60065b 106 timer.start();
kadonotakashi 0:8fdf9a60065b 107
kadonotakashi 0:8fdf9a60065b 108 int err = equeue_sema_create(&sema);
kadonotakashi 0:8fdf9a60065b 109 TEST_ASSERT_EQUAL(0, err);
kadonotakashi 0:8fdf9a60065b 110
kadonotakashi 0:8fdf9a60065b 111 while (timer.read_ms() < TEST_EVENTS_TIMING_TIME) {
kadonotakashi 0:8fdf9a60065b 112 int delay = chisq(TEST_EVENTS_TIMING_MEAN);
kadonotakashi 0:8fdf9a60065b 113
kadonotakashi 0:8fdf9a60065b 114 int start = timer.read_us();
kadonotakashi 0:8fdf9a60065b 115 equeue_sema_wait(&sema, delay);
kadonotakashi 0:8fdf9a60065b 116 int taken = timer.read_us() - start;
kadonotakashi 0:8fdf9a60065b 117
kadonotakashi 0:8fdf9a60065b 118 if (taken < (delay * 1000 - 5000) || taken > (delay * 1000 + 5000)) {
kadonotakashi 0:8fdf9a60065b 119 printf("delay %dms => error %dus\r\n", delay, abs(1000 * delay - taken));
kadonotakashi 0:8fdf9a60065b 120 }
kadonotakashi 0:8fdf9a60065b 121
kadonotakashi 0:8fdf9a60065b 122 TEST_ASSERT_INT_WITHIN(5000, taken, delay * 1000);
kadonotakashi 0:8fdf9a60065b 123
kadonotakashi 0:8fdf9a60065b 124 led = !led;
kadonotakashi 0:8fdf9a60065b 125 }
kadonotakashi 0:8fdf9a60065b 126
kadonotakashi 0:8fdf9a60065b 127 equeue_sema_destroy(&sema);
kadonotakashi 0:8fdf9a60065b 128 }
kadonotakashi 0:8fdf9a60065b 129
kadonotakashi 0:8fdf9a60065b 130
kadonotakashi 0:8fdf9a60065b 131 // Test setup
kadonotakashi 0:8fdf9a60065b 132 utest::v1::status_t test_setup(const size_t number_of_cases)
kadonotakashi 0:8fdf9a60065b 133 {
kadonotakashi 0:8fdf9a60065b 134 GREENTEA_SETUP((number_of_cases + 1)*TEST_EVENTS_TIMING_TIME / 1000, "default_auto");
kadonotakashi 0:8fdf9a60065b 135 return verbose_test_setup_handler(number_of_cases);
kadonotakashi 0:8fdf9a60065b 136 }
kadonotakashi 0:8fdf9a60065b 137
kadonotakashi 0:8fdf9a60065b 138 const Case cases[] = {
kadonotakashi 0:8fdf9a60065b 139 Case("Testing accuracy of timer", timer_timing_test),
kadonotakashi 0:8fdf9a60065b 140 Case("Testing accuracy of equeue tick", tick_timing_test),
kadonotakashi 0:8fdf9a60065b 141 Case("Testing accuracy of equeue semaphore", semaphore_timing_test),
kadonotakashi 0:8fdf9a60065b 142 };
kadonotakashi 0:8fdf9a60065b 143
kadonotakashi 0:8fdf9a60065b 144 Specification specification(test_setup, cases);
kadonotakashi 0:8fdf9a60065b 145
kadonotakashi 0:8fdf9a60065b 146 int main()
kadonotakashi 0:8fdf9a60065b 147 {
kadonotakashi 0:8fdf9a60065b 148 return !Harness::run(specification);
kadonotakashi 0:8fdf9a60065b 149 }
kadonotakashi 0:8fdf9a60065b 150