joey shelton / LED_Demo2

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Dependencies:   MAX44000 PWM_Tone_Library nexpaq_mdk

Fork of LED_Demo by joey shelton

mbd_os/hal/api/Timer.h@9:6bb35cef007d, 2016-10-22 (annotated)

Committer:
cyberjoey
Date:
Sat Oct 22 01:31:58 2016 +0000
Revision:
9:6bb35cef007d
Parent:
1:55a6170b404f 
WORKING

Who changed what in which revision?

UserRevisionLine numberNew contents of line
nexpaq 1:55a6170b404f 1 /* mbed Microcontroller Library
nexpaq 1:55a6170b404f 2 * Copyright (c) 2006-2013 ARM Limited
nexpaq 1:55a6170b404f 3 *
nexpaq 1:55a6170b404f 4 * Licensed under the Apache License, Version 2.0 (the "License");
nexpaq 1:55a6170b404f 5 * you may not use this file except in compliance with the License.
nexpaq 1:55a6170b404f 6 * You may obtain a copy of the License at
nexpaq 1:55a6170b404f 7 *
nexpaq 1:55a6170b404f 8 * http://www.apache.org/licenses/LICENSE-2.0
nexpaq 1:55a6170b404f 9 *
nexpaq 1:55a6170b404f 10 * Unless required by applicable law or agreed to in writing, software
nexpaq 1:55a6170b404f 11 * distributed under the License is distributed on an "AS IS" BASIS,
nexpaq 1:55a6170b404f 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
nexpaq 1:55a6170b404f 13 * See the License for the specific language governing permissions and
nexpaq 1:55a6170b404f 14 * limitations under the License.
nexpaq 1:55a6170b404f 15 */
nexpaq 1:55a6170b404f 16 #ifndef MBED_TIMER_H
nexpaq 1:55a6170b404f 17 #define MBED_TIMER_H
nexpaq 1:55a6170b404f 18
nexpaq 1:55a6170b404f 19 #include "platform.h"
nexpaq 1:55a6170b404f 20 #include "ticker_api.h"
nexpaq 1:55a6170b404f 21
nexpaq 1:55a6170b404f 22 namespace mbed {
nexpaq 1:55a6170b404f 23
nexpaq 1:55a6170b404f 24 /** A general purpose timer
nexpaq 1:55a6170b404f 25 *
nexpaq 1:55a6170b404f 26 * @Note Synchronization level: Interrupt safe
nexpaq 1:55a6170b404f 27 *
nexpaq 1:55a6170b404f 28 * Example:
nexpaq 1:55a6170b404f 29 * @code
nexpaq 1:55a6170b404f 30 * // Count the time to toggle a LED
nexpaq 1:55a6170b404f 31 *
nexpaq 1:55a6170b404f 32 * #include "mbed.h"
nexpaq 1:55a6170b404f 33 *
nexpaq 1:55a6170b404f 34 * Timer timer;
nexpaq 1:55a6170b404f 35 * DigitalOut led(LED1);
nexpaq 1:55a6170b404f 36 * int begin, end;
nexpaq 1:55a6170b404f 37 *
nexpaq 1:55a6170b404f 38 * int main() {
nexpaq 1:55a6170b404f 39 * timer.start();
nexpaq 1:55a6170b404f 40 * begin = timer.read_us();
nexpaq 1:55a6170b404f 41 * led = !led;
nexpaq 1:55a6170b404f 42 * end = timer.read_us();
nexpaq 1:55a6170b404f 43 * printf("Toggle the led takes %d us", end - begin);
nexpaq 1:55a6170b404f 44 * }
nexpaq 1:55a6170b404f 45 * @endcode
nexpaq 1:55a6170b404f 46 */
nexpaq 1:55a6170b404f 47 class Timer {
nexpaq 1:55a6170b404f 48
nexpaq 1:55a6170b404f 49 public:
nexpaq 1:55a6170b404f 50 Timer();
nexpaq 1:55a6170b404f 51 Timer(const ticker_data_t *data);
nexpaq 1:55a6170b404f 52
nexpaq 1:55a6170b404f 53 /** Start the timer
nexpaq 1:55a6170b404f 54 */
nexpaq 1:55a6170b404f 55 void start();
nexpaq 1:55a6170b404f 56
nexpaq 1:55a6170b404f 57 /** Stop the timer
nexpaq 1:55a6170b404f 58 */
nexpaq 1:55a6170b404f 59 void stop();
nexpaq 1:55a6170b404f 60
nexpaq 1:55a6170b404f 61 /** Reset the timer to 0.
nexpaq 1:55a6170b404f 62 *
nexpaq 1:55a6170b404f 63 * If it was already counting, it will continue
nexpaq 1:55a6170b404f 64 */
nexpaq 1:55a6170b404f 65 void reset();
nexpaq 1:55a6170b404f 66
nexpaq 1:55a6170b404f 67 /** Get the time passed in seconds
nexpaq 1:55a6170b404f 68 */
nexpaq 1:55a6170b404f 69 float read();
nexpaq 1:55a6170b404f 70
nexpaq 1:55a6170b404f 71 /** Get the time passed in mili-seconds
nexpaq 1:55a6170b404f 72 */
nexpaq 1:55a6170b404f 73 int read_ms();
nexpaq 1:55a6170b404f 74
nexpaq 1:55a6170b404f 75 /** Get the time passed in micro-seconds
nexpaq 1:55a6170b404f 76 */
nexpaq 1:55a6170b404f 77 int read_us();
nexpaq 1:55a6170b404f 78
nexpaq 1:55a6170b404f 79 /** An operator shorthand for read()
nexpaq 1:55a6170b404f 80 */
nexpaq 1:55a6170b404f 81 operator float();
nexpaq 1:55a6170b404f 82
nexpaq 1:55a6170b404f 83 protected:
nexpaq 1:55a6170b404f 84 int slicetime();
nexpaq 1:55a6170b404f 85 int _running; // whether the timer is running
nexpaq 1:55a6170b404f 86 unsigned int _start; // the start time of the latest slice
nexpaq 1:55a6170b404f 87 int _time; // any accumulated time from previous slices
nexpaq 1:55a6170b404f 88 const ticker_data_t *_ticker_data;
nexpaq 1:55a6170b404f 89 };
nexpaq 1:55a6170b404f 90
nexpaq 1:55a6170b404f 91 } // namespace mbed
nexpaq 1:55a6170b404f 92
nexpaq 1:55a6170b404f 93 #endif