Initial commit
mbed-dev-master/drivers/Timer.cpp@0:bb348c97df44, 2020-09-16 (annotated)
- Committer:
- lypinator
- Date:
- Wed Sep 16 01:11:49 2020 +0000
- Revision:
- 0:bb348c97df44
Added PWM
Who changed what in which revision?
User | Revision | Line number | New contents of line |
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lypinator | 0:bb348c97df44 | 1 | /* mbed Microcontroller Library |
lypinator | 0:bb348c97df44 | 2 | * Copyright (c) 2006-2013 ARM Limited |
lypinator | 0:bb348c97df44 | 3 | * |
lypinator | 0:bb348c97df44 | 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
lypinator | 0:bb348c97df44 | 5 | * you may not use this file except in compliance with the License. |
lypinator | 0:bb348c97df44 | 6 | * You may obtain a copy of the License at |
lypinator | 0:bb348c97df44 | 7 | * |
lypinator | 0:bb348c97df44 | 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
lypinator | 0:bb348c97df44 | 9 | * |
lypinator | 0:bb348c97df44 | 10 | * Unless required by applicable law or agreed to in writing, software |
lypinator | 0:bb348c97df44 | 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
lypinator | 0:bb348c97df44 | 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
lypinator | 0:bb348c97df44 | 13 | * See the License for the specific language governing permissions and |
lypinator | 0:bb348c97df44 | 14 | * limitations under the License. |
lypinator | 0:bb348c97df44 | 15 | */ |
lypinator | 0:bb348c97df44 | 16 | #include "drivers/Timer.h" |
lypinator | 0:bb348c97df44 | 17 | #include "hal/ticker_api.h" |
lypinator | 0:bb348c97df44 | 18 | #include "hal/us_ticker_api.h" |
lypinator | 0:bb348c97df44 | 19 | #include "platform/mbed_critical.h" |
lypinator | 0:bb348c97df44 | 20 | #include "hal/lp_ticker_api.h" |
lypinator | 0:bb348c97df44 | 21 | |
lypinator | 0:bb348c97df44 | 22 | namespace mbed { |
lypinator | 0:bb348c97df44 | 23 | |
lypinator | 0:bb348c97df44 | 24 | Timer::Timer() : _running(), _start(), _time(), _ticker_data(get_us_ticker_data()), _lock_deepsleep(true) |
lypinator | 0:bb348c97df44 | 25 | { |
lypinator | 0:bb348c97df44 | 26 | reset(); |
lypinator | 0:bb348c97df44 | 27 | } |
lypinator | 0:bb348c97df44 | 28 | |
lypinator | 0:bb348c97df44 | 29 | Timer::Timer(const ticker_data_t *data) : _running(), _start(), _time(), _ticker_data(data), _lock_deepsleep(true) |
lypinator | 0:bb348c97df44 | 30 | { |
lypinator | 0:bb348c97df44 | 31 | reset(); |
lypinator | 0:bb348c97df44 | 32 | #if DEVICE_LPTICKER |
lypinator | 0:bb348c97df44 | 33 | _lock_deepsleep = (data != get_lp_ticker_data()); |
lypinator | 0:bb348c97df44 | 34 | #endif |
lypinator | 0:bb348c97df44 | 35 | } |
lypinator | 0:bb348c97df44 | 36 | |
lypinator | 0:bb348c97df44 | 37 | Timer::~Timer() |
lypinator | 0:bb348c97df44 | 38 | { |
lypinator | 0:bb348c97df44 | 39 | core_util_critical_section_enter(); |
lypinator | 0:bb348c97df44 | 40 | if (_running) { |
lypinator | 0:bb348c97df44 | 41 | if (_lock_deepsleep) { |
lypinator | 0:bb348c97df44 | 42 | sleep_manager_unlock_deep_sleep(); |
lypinator | 0:bb348c97df44 | 43 | } |
lypinator | 0:bb348c97df44 | 44 | } |
lypinator | 0:bb348c97df44 | 45 | _running = 0; |
lypinator | 0:bb348c97df44 | 46 | core_util_critical_section_exit(); |
lypinator | 0:bb348c97df44 | 47 | } |
lypinator | 0:bb348c97df44 | 48 | |
lypinator | 0:bb348c97df44 | 49 | void Timer::start() |
lypinator | 0:bb348c97df44 | 50 | { |
lypinator | 0:bb348c97df44 | 51 | core_util_critical_section_enter(); |
lypinator | 0:bb348c97df44 | 52 | if (!_running) { |
lypinator | 0:bb348c97df44 | 53 | if (_lock_deepsleep) { |
lypinator | 0:bb348c97df44 | 54 | sleep_manager_lock_deep_sleep(); |
lypinator | 0:bb348c97df44 | 55 | } |
lypinator | 0:bb348c97df44 | 56 | _start = ticker_read_us(_ticker_data); |
lypinator | 0:bb348c97df44 | 57 | _running = 1; |
lypinator | 0:bb348c97df44 | 58 | } |
lypinator | 0:bb348c97df44 | 59 | core_util_critical_section_exit(); |
lypinator | 0:bb348c97df44 | 60 | } |
lypinator | 0:bb348c97df44 | 61 | |
lypinator | 0:bb348c97df44 | 62 | void Timer::stop() |
lypinator | 0:bb348c97df44 | 63 | { |
lypinator | 0:bb348c97df44 | 64 | core_util_critical_section_enter(); |
lypinator | 0:bb348c97df44 | 65 | _time += slicetime(); |
lypinator | 0:bb348c97df44 | 66 | if (_running) { |
lypinator | 0:bb348c97df44 | 67 | if (_lock_deepsleep) { |
lypinator | 0:bb348c97df44 | 68 | sleep_manager_unlock_deep_sleep(); |
lypinator | 0:bb348c97df44 | 69 | } |
lypinator | 0:bb348c97df44 | 70 | } |
lypinator | 0:bb348c97df44 | 71 | _running = 0; |
lypinator | 0:bb348c97df44 | 72 | core_util_critical_section_exit(); |
lypinator | 0:bb348c97df44 | 73 | } |
lypinator | 0:bb348c97df44 | 74 | |
lypinator | 0:bb348c97df44 | 75 | int Timer::read_us() |
lypinator | 0:bb348c97df44 | 76 | { |
lypinator | 0:bb348c97df44 | 77 | return read_high_resolution_us(); |
lypinator | 0:bb348c97df44 | 78 | } |
lypinator | 0:bb348c97df44 | 79 | |
lypinator | 0:bb348c97df44 | 80 | float Timer::read() |
lypinator | 0:bb348c97df44 | 81 | { |
lypinator | 0:bb348c97df44 | 82 | return (float)read_us() / 1000000.0f; |
lypinator | 0:bb348c97df44 | 83 | } |
lypinator | 0:bb348c97df44 | 84 | |
lypinator | 0:bb348c97df44 | 85 | int Timer::read_ms() |
lypinator | 0:bb348c97df44 | 86 | { |
lypinator | 0:bb348c97df44 | 87 | return read_high_resolution_us() / 1000; |
lypinator | 0:bb348c97df44 | 88 | } |
lypinator | 0:bb348c97df44 | 89 | |
lypinator | 0:bb348c97df44 | 90 | us_timestamp_t Timer::read_high_resolution_us() |
lypinator | 0:bb348c97df44 | 91 | { |
lypinator | 0:bb348c97df44 | 92 | core_util_critical_section_enter(); |
lypinator | 0:bb348c97df44 | 93 | us_timestamp_t time = _time + slicetime(); |
lypinator | 0:bb348c97df44 | 94 | core_util_critical_section_exit(); |
lypinator | 0:bb348c97df44 | 95 | return time; |
lypinator | 0:bb348c97df44 | 96 | } |
lypinator | 0:bb348c97df44 | 97 | |
lypinator | 0:bb348c97df44 | 98 | us_timestamp_t Timer::slicetime() |
lypinator | 0:bb348c97df44 | 99 | { |
lypinator | 0:bb348c97df44 | 100 | us_timestamp_t ret = 0; |
lypinator | 0:bb348c97df44 | 101 | core_util_critical_section_enter(); |
lypinator | 0:bb348c97df44 | 102 | if (_running) { |
lypinator | 0:bb348c97df44 | 103 | ret = ticker_read_us(_ticker_data) - _start; |
lypinator | 0:bb348c97df44 | 104 | } |
lypinator | 0:bb348c97df44 | 105 | core_util_critical_section_exit(); |
lypinator | 0:bb348c97df44 | 106 | return ret; |
lypinator | 0:bb348c97df44 | 107 | } |
lypinator | 0:bb348c97df44 | 108 | |
lypinator | 0:bb348c97df44 | 109 | void Timer::reset() |
lypinator | 0:bb348c97df44 | 110 | { |
lypinator | 0:bb348c97df44 | 111 | core_util_critical_section_enter(); |
lypinator | 0:bb348c97df44 | 112 | _start = ticker_read_us(_ticker_data); |
lypinator | 0:bb348c97df44 | 113 | _time = 0; |
lypinator | 0:bb348c97df44 | 114 | core_util_critical_section_exit(); |
lypinator | 0:bb348c97df44 | 115 | } |
lypinator | 0:bb348c97df44 | 116 | |
lypinator | 0:bb348c97df44 | 117 | Timer::operator float() |
lypinator | 0:bb348c97df44 | 118 | { |
lypinator | 0:bb348c97df44 | 119 | return read(); |
lypinator | 0:bb348c97df44 | 120 | } |
lypinator | 0:bb348c97df44 | 121 | |
lypinator | 0:bb348c97df44 | 122 | } // namespace mbed |