Damian Gabino / picoGW_mcu

MCU driver/HAL for the Picocell Gateway concentrator board. The firmware implements either a USB CDC protocol or a UART protocol to bridge commands coming from host to the SX1308 SPI interface.

src/mbed-dev/common/Timer.cpp@0:c76361bd82e8, 2018-04-11 (annotated)

Committer:
dgabino
Date:
Wed Apr 11 14:42:47 2018 +0000
Revision:
0:c76361bd82e8
Initial commit

Who changed what in which revision?

UserRevisionLine numberNew contents of line
dgabino 0:c76361bd82e8 1 /* mbed Microcontroller Library
dgabino 0:c76361bd82e8 2 * Copyright (c) 2006-2013 ARM Limited
dgabino 0:c76361bd82e8 3 *
dgabino 0:c76361bd82e8 4 * Licensed under the Apache License, Version 2.0 (the "License");
dgabino 0:c76361bd82e8 5 * you may not use this file except in compliance with the License.
dgabino 0:c76361bd82e8 6 * You may obtain a copy of the License at
dgabino 0:c76361bd82e8 7 *
dgabino 0:c76361bd82e8 8 * http://www.apache.org/licenses/LICENSE-2.0
dgabino 0:c76361bd82e8 9 *
dgabino 0:c76361bd82e8 10 * Unless required by applicable law or agreed to in writing, software
dgabino 0:c76361bd82e8 11 * distributed under the License is distributed on an "AS IS" BASIS,
dgabino 0:c76361bd82e8 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
dgabino 0:c76361bd82e8 13 * See the License for the specific language governing permissions and
dgabino 0:c76361bd82e8 14 * limitations under the License.
dgabino 0:c76361bd82e8 15 */
dgabino 0:c76361bd82e8 16 #include "Timer.h"
dgabino 0:c76361bd82e8 17 #include "ticker_api.h"
dgabino 0:c76361bd82e8 18 #include "us_ticker_api.h"
dgabino 0:c76361bd82e8 19 #include "critical.h"
dgabino 0:c76361bd82e8 20
dgabino 0:c76361bd82e8 21 namespace mbed {
dgabino 0:c76361bd82e8 22
dgabino 0:c76361bd82e8 23 Timer::Timer() : _running(), _start(), _time(), _ticker_data(get_us_ticker_data()) {
dgabino 0:c76361bd82e8 24 reset();
dgabino 0:c76361bd82e8 25 }
dgabino 0:c76361bd82e8 26
dgabino 0:c76361bd82e8 27 Timer::Timer(const ticker_data_t *data) : _running(), _start(), _time(), _ticker_data(data) {
dgabino 0:c76361bd82e8 28 reset();
dgabino 0:c76361bd82e8 29 }
dgabino 0:c76361bd82e8 30
dgabino 0:c76361bd82e8 31 void Timer::start() {
dgabino 0:c76361bd82e8 32 core_util_critical_section_enter();
dgabino 0:c76361bd82e8 33 if (!_running) {
dgabino 0:c76361bd82e8 34 _start = ticker_read(_ticker_data);
dgabino 0:c76361bd82e8 35 _running = 1;
dgabino 0:c76361bd82e8 36 }
dgabino 0:c76361bd82e8 37 core_util_critical_section_exit();
dgabino 0:c76361bd82e8 38 }
dgabino 0:c76361bd82e8 39
dgabino 0:c76361bd82e8 40 void Timer::stop() {
dgabino 0:c76361bd82e8 41 core_util_critical_section_enter();
dgabino 0:c76361bd82e8 42 _time += slicetime();
dgabino 0:c76361bd82e8 43 _running = 0;
dgabino 0:c76361bd82e8 44 core_util_critical_section_exit();
dgabino 0:c76361bd82e8 45 }
dgabino 0:c76361bd82e8 46
dgabino 0:c76361bd82e8 47 int Timer::read_us() {
dgabino 0:c76361bd82e8 48 core_util_critical_section_enter();
dgabino 0:c76361bd82e8 49 int time = _time + slicetime();
dgabino 0:c76361bd82e8 50 core_util_critical_section_exit();
dgabino 0:c76361bd82e8 51 return time;
dgabino 0:c76361bd82e8 52 }
dgabino 0:c76361bd82e8 53
dgabino 0:c76361bd82e8 54 float Timer::read() {
dgabino 0:c76361bd82e8 55 return (float)read_us() / 1000000.0f;
dgabino 0:c76361bd82e8 56 }
dgabino 0:c76361bd82e8 57
dgabino 0:c76361bd82e8 58 int Timer::read_ms() {
dgabino 0:c76361bd82e8 59 return read_us() / 1000;
dgabino 0:c76361bd82e8 60 }
dgabino 0:c76361bd82e8 61
dgabino 0:c76361bd82e8 62 int Timer::slicetime() {
dgabino 0:c76361bd82e8 63 core_util_critical_section_enter();
dgabino 0:c76361bd82e8 64 int ret = 0;
dgabino 0:c76361bd82e8 65 if (_running) {
dgabino 0:c76361bd82e8 66 ret = ticker_read(_ticker_data) - _start;
dgabino 0:c76361bd82e8 67 }
dgabino 0:c76361bd82e8 68 core_util_critical_section_exit();
dgabino 0:c76361bd82e8 69 return ret;
dgabino 0:c76361bd82e8 70 }
dgabino 0:c76361bd82e8 71
dgabino 0:c76361bd82e8 72 void Timer::reset() {
dgabino 0:c76361bd82e8 73 core_util_critical_section_enter();
dgabino 0:c76361bd82e8 74 _start = ticker_read(_ticker_data);
dgabino 0:c76361bd82e8 75 _time = 0;
dgabino 0:c76361bd82e8 76 core_util_critical_section_exit();
dgabino 0:c76361bd82e8 77 }
dgabino 0:c76361bd82e8 78
dgabino 0:c76361bd82e8 79 Timer::operator float() {
dgabino 0:c76361bd82e8 80 return read();
dgabino 0:c76361bd82e8 81 }
dgabino 0:c76361bd82e8 82
dgabino 0:c76361bd82e8 83 } // namespace mbed