The official Mbed 2 C/C++ SDK provides the software platform and libraries to build your applications.
Dependents: hello SerialTestv11 SerialTestv12 Sierpinski ... more
mbed 2
This is the mbed 2 library. If you'd like to learn about Mbed OS please see the mbed-os docs.
drivers/Timer.h@143:86740a56073b, 2017-05-26 (annotated)
- Committer:
- AnnaBridge
- Date:
- Fri May 26 12:30:20 2017 +0100
- Revision:
- 143:86740a56073b
- Parent:
- 128:9bcdf88f62b0
- Child:
- 145:64910690c574
Release 143 of the mbed library.
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
<> | 128:9bcdf88f62b0 | 1 | /* mbed Microcontroller Library |
<> | 128:9bcdf88f62b0 | 2 | * Copyright (c) 2006-2013 ARM Limited |
<> | 128:9bcdf88f62b0 | 3 | * |
<> | 128:9bcdf88f62b0 | 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
<> | 128:9bcdf88f62b0 | 5 | * you may not use this file except in compliance with the License. |
<> | 128:9bcdf88f62b0 | 6 | * You may obtain a copy of the License at |
<> | 128:9bcdf88f62b0 | 7 | * |
<> | 128:9bcdf88f62b0 | 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
<> | 128:9bcdf88f62b0 | 9 | * |
<> | 128:9bcdf88f62b0 | 10 | * Unless required by applicable law or agreed to in writing, software |
<> | 128:9bcdf88f62b0 | 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
<> | 128:9bcdf88f62b0 | 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
<> | 128:9bcdf88f62b0 | 13 | * See the License for the specific language governing permissions and |
<> | 128:9bcdf88f62b0 | 14 | * limitations under the License. |
<> | 128:9bcdf88f62b0 | 15 | */ |
<> | 128:9bcdf88f62b0 | 16 | #ifndef MBED_TIMER_H |
<> | 128:9bcdf88f62b0 | 17 | #define MBED_TIMER_H |
<> | 128:9bcdf88f62b0 | 18 | |
<> | 128:9bcdf88f62b0 | 19 | #include "platform/platform.h" |
<> | 128:9bcdf88f62b0 | 20 | #include "hal/ticker_api.h" |
<> | 128:9bcdf88f62b0 | 21 | |
<> | 128:9bcdf88f62b0 | 22 | namespace mbed { |
<> | 128:9bcdf88f62b0 | 23 | /** \addtogroup drivers */ |
<> | 128:9bcdf88f62b0 | 24 | /** @{*/ |
<> | 128:9bcdf88f62b0 | 25 | |
<> | 128:9bcdf88f62b0 | 26 | /** A general purpose timer |
<> | 128:9bcdf88f62b0 | 27 | * |
<> | 128:9bcdf88f62b0 | 28 | * @Note Synchronization level: Interrupt safe |
<> | 128:9bcdf88f62b0 | 29 | * |
<> | 128:9bcdf88f62b0 | 30 | * Example: |
<> | 128:9bcdf88f62b0 | 31 | * @code |
<> | 128:9bcdf88f62b0 | 32 | * // Count the time to toggle a LED |
<> | 128:9bcdf88f62b0 | 33 | * |
<> | 128:9bcdf88f62b0 | 34 | * #include "mbed.h" |
<> | 128:9bcdf88f62b0 | 35 | * |
<> | 128:9bcdf88f62b0 | 36 | * Timer timer; |
<> | 128:9bcdf88f62b0 | 37 | * DigitalOut led(LED1); |
<> | 128:9bcdf88f62b0 | 38 | * int begin, end; |
<> | 128:9bcdf88f62b0 | 39 | * |
<> | 128:9bcdf88f62b0 | 40 | * int main() { |
<> | 128:9bcdf88f62b0 | 41 | * timer.start(); |
<> | 128:9bcdf88f62b0 | 42 | * begin = timer.read_us(); |
<> | 128:9bcdf88f62b0 | 43 | * led = !led; |
<> | 128:9bcdf88f62b0 | 44 | * end = timer.read_us(); |
<> | 128:9bcdf88f62b0 | 45 | * printf("Toggle the led takes %d us", end - begin); |
<> | 128:9bcdf88f62b0 | 46 | * } |
<> | 128:9bcdf88f62b0 | 47 | * @endcode |
<> | 128:9bcdf88f62b0 | 48 | */ |
<> | 128:9bcdf88f62b0 | 49 | class Timer { |
<> | 128:9bcdf88f62b0 | 50 | |
<> | 128:9bcdf88f62b0 | 51 | public: |
<> | 128:9bcdf88f62b0 | 52 | Timer(); |
<> | 128:9bcdf88f62b0 | 53 | Timer(const ticker_data_t *data); |
<> | 128:9bcdf88f62b0 | 54 | |
<> | 128:9bcdf88f62b0 | 55 | /** Start the timer |
<> | 128:9bcdf88f62b0 | 56 | */ |
<> | 128:9bcdf88f62b0 | 57 | void start(); |
<> | 128:9bcdf88f62b0 | 58 | |
<> | 128:9bcdf88f62b0 | 59 | /** Stop the timer |
<> | 128:9bcdf88f62b0 | 60 | */ |
<> | 128:9bcdf88f62b0 | 61 | void stop(); |
<> | 128:9bcdf88f62b0 | 62 | |
<> | 128:9bcdf88f62b0 | 63 | /** Reset the timer to 0. |
<> | 128:9bcdf88f62b0 | 64 | * |
<> | 128:9bcdf88f62b0 | 65 | * If it was already counting, it will continue |
<> | 128:9bcdf88f62b0 | 66 | */ |
<> | 128:9bcdf88f62b0 | 67 | void reset(); |
<> | 128:9bcdf88f62b0 | 68 | |
<> | 128:9bcdf88f62b0 | 69 | /** Get the time passed in seconds |
<> | 128:9bcdf88f62b0 | 70 | */ |
<> | 128:9bcdf88f62b0 | 71 | float read(); |
<> | 128:9bcdf88f62b0 | 72 | |
<> | 128:9bcdf88f62b0 | 73 | /** Get the time passed in mili-seconds |
<> | 128:9bcdf88f62b0 | 74 | */ |
<> | 128:9bcdf88f62b0 | 75 | int read_ms(); |
<> | 128:9bcdf88f62b0 | 76 | |
<> | 128:9bcdf88f62b0 | 77 | /** Get the time passed in micro-seconds |
<> | 128:9bcdf88f62b0 | 78 | */ |
<> | 128:9bcdf88f62b0 | 79 | int read_us(); |
<> | 128:9bcdf88f62b0 | 80 | |
<> | 128:9bcdf88f62b0 | 81 | /** An operator shorthand for read() |
<> | 128:9bcdf88f62b0 | 82 | */ |
<> | 128:9bcdf88f62b0 | 83 | operator float(); |
<> | 128:9bcdf88f62b0 | 84 | |
<> | 128:9bcdf88f62b0 | 85 | protected: |
<> | 128:9bcdf88f62b0 | 86 | int slicetime(); |
<> | 128:9bcdf88f62b0 | 87 | int _running; // whether the timer is running |
<> | 128:9bcdf88f62b0 | 88 | unsigned int _start; // the start time of the latest slice |
<> | 128:9bcdf88f62b0 | 89 | int _time; // any accumulated time from previous slices |
<> | 128:9bcdf88f62b0 | 90 | const ticker_data_t *_ticker_data; |
<> | 128:9bcdf88f62b0 | 91 | }; |
<> | 128:9bcdf88f62b0 | 92 | |
<> | 128:9bcdf88f62b0 | 93 | } // namespace mbed |
<> | 128:9bcdf88f62b0 | 94 | |
<> | 128:9bcdf88f62b0 | 95 | #endif |
<> | 128:9bcdf88f62b0 | 96 | |
<> | 128:9bcdf88f62b0 | 97 | /** @}*/ |