Yihui Xiong / mbed-src-nrf51822

customized mbed library sources for nrf51822

Dependents:   Grove_Node Potentiometer BLE_Beacon I2C_Scanner

api/Timer.h@0:700cadd8b708, 2014-11-04 (annotated)

Committer:
yihui
Date:
Tue Nov 04 07:38:53 2014 +0000
Revision:
0:700cadd8b708
customized mbed-src library for nrf51822

Who changed what in which revision?

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yihui 0:700cadd8b708 1 /* mbed Microcontroller Library
yihui 0:700cadd8b708 2 * Copyright (c) 2006-2013 ARM Limited
yihui 0:700cadd8b708 3 *
yihui 0:700cadd8b708 4 * Licensed under the Apache License, Version 2.0 (the "License");
yihui 0:700cadd8b708 5 * you may not use this file except in compliance with the License.
yihui 0:700cadd8b708 6 * You may obtain a copy of the License at
yihui 0:700cadd8b708 7 *
yihui 0:700cadd8b708 8 * http://www.apache.org/licenses/LICENSE-2.0
yihui 0:700cadd8b708 9 *
yihui 0:700cadd8b708 10 * Unless required by applicable law or agreed to in writing, software
yihui 0:700cadd8b708 11 * distributed under the License is distributed on an "AS IS" BASIS,
yihui 0:700cadd8b708 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
yihui 0:700cadd8b708 13 * See the License for the specific language governing permissions and
yihui 0:700cadd8b708 14 * limitations under the License.
yihui 0:700cadd8b708 15 */
yihui 0:700cadd8b708 16 #ifndef MBED_TIMER_H
yihui 0:700cadd8b708 17 #define MBED_TIMER_H
yihui 0:700cadd8b708 18
yihui 0:700cadd8b708 19 #include "platform.h"
yihui 0:700cadd8b708 20
yihui 0:700cadd8b708 21 namespace mbed {
yihui 0:700cadd8b708 22
yihui 0:700cadd8b708 23 /** A general purpose timer
yihui 0:700cadd8b708 24 *
yihui 0:700cadd8b708 25 * Example:
yihui 0:700cadd8b708 26 * @code
yihui 0:700cadd8b708 27 * // Count the time to toggle a LED
yihui 0:700cadd8b708 28 *
yihui 0:700cadd8b708 29 * #include "mbed.h"
yihui 0:700cadd8b708 30 *
yihui 0:700cadd8b708 31 * Timer timer;
yihui 0:700cadd8b708 32 * DigitalOut led(LED1);
yihui 0:700cadd8b708 33 * int begin, end;
yihui 0:700cadd8b708 34 *
yihui 0:700cadd8b708 35 * int main() {
yihui 0:700cadd8b708 36 * timer.start();
yihui 0:700cadd8b708 37 * begin = timer.read_us();
yihui 0:700cadd8b708 38 * led = !led;
yihui 0:700cadd8b708 39 * end = timer.read_us();
yihui 0:700cadd8b708 40 * printf("Toggle the led takes %d us", end - begin);
yihui 0:700cadd8b708 41 * }
yihui 0:700cadd8b708 42 * @endcode
yihui 0:700cadd8b708 43 */
yihui 0:700cadd8b708 44 class Timer {
yihui 0:700cadd8b708 45
yihui 0:700cadd8b708 46 public:
yihui 0:700cadd8b708 47 Timer();
yihui 0:700cadd8b708 48
yihui 0:700cadd8b708 49 /** Start the timer
yihui 0:700cadd8b708 50 */
yihui 0:700cadd8b708 51 void start();
yihui 0:700cadd8b708 52
yihui 0:700cadd8b708 53 /** Stop the timer
yihui 0:700cadd8b708 54 */
yihui 0:700cadd8b708 55 void stop();
yihui 0:700cadd8b708 56
yihui 0:700cadd8b708 57 /** Reset the timer to 0.
yihui 0:700cadd8b708 58 *
yihui 0:700cadd8b708 59 * If it was already counting, it will continue
yihui 0:700cadd8b708 60 */
yihui 0:700cadd8b708 61 void reset();
yihui 0:700cadd8b708 62
yihui 0:700cadd8b708 63 /** Get the time passed in seconds
yihui 0:700cadd8b708 64 */
yihui 0:700cadd8b708 65 float read();
yihui 0:700cadd8b708 66
yihui 0:700cadd8b708 67 /** Get the time passed in mili-seconds
yihui 0:700cadd8b708 68 */
yihui 0:700cadd8b708 69 int read_ms();
yihui 0:700cadd8b708 70
yihui 0:700cadd8b708 71 /** Get the time passed in micro-seconds
yihui 0:700cadd8b708 72 */
yihui 0:700cadd8b708 73 int read_us();
yihui 0:700cadd8b708 74
yihui 0:700cadd8b708 75 #ifdef MBED_OPERATORS
yihui 0:700cadd8b708 76 operator float();
yihui 0:700cadd8b708 77 #endif
yihui 0:700cadd8b708 78
yihui 0:700cadd8b708 79 protected:
yihui 0:700cadd8b708 80 int slicetime();
yihui 0:700cadd8b708 81 int _running; // whether the timer is running
yihui 0:700cadd8b708 82 unsigned int _start; // the start time of the latest slice
yihui 0:700cadd8b708 83 int _time; // any accumulated time from previous slices
yihui 0:700cadd8b708 84 };
yihui 0:700cadd8b708 85
yihui 0:700cadd8b708 86 } // namespace mbed
yihui 0:700cadd8b708 87
yihui 0:700cadd8b708 88 #endif