an asynchronous ticker which calls methods in a regular fashion, but not from an interrupt handler. This allows the called methods to do complex and more time-consuming stuff (e.g. network requests, calculation, or printing to the serial console)
ASyncTicker.cpp@0:13db8277ce26, 2011-02-24 (annotated)
- Committer:
- hlipka
- Date:
- Thu Feb 24 14:06:24 2011 +0000
- Revision:
- 0:13db8277ce26
initial version
Who changed what in which revision?
User | Revision | Line number | New contents of line |
---|---|---|---|
hlipka | 0:13db8277ce26 | 1 | /* |
hlipka | 0:13db8277ce26 | 2 | * mbed ASyncTicker library |
hlipka | 0:13db8277ce26 | 3 | * Copyright (c) 2010 Hendrik Lipka |
hlipka | 0:13db8277ce26 | 4 | * |
hlipka | 0:13db8277ce26 | 5 | * Permission is hereby granted, free of charge, to any person obtaining a copy |
hlipka | 0:13db8277ce26 | 6 | * of this software and associated documentation files (the "Software"), to deal |
hlipka | 0:13db8277ce26 | 7 | * in the Software without restriction, including without limitation the rights |
hlipka | 0:13db8277ce26 | 8 | * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell |
hlipka | 0:13db8277ce26 | 9 | * copies of the Software, and to permit persons to whom the Software is |
hlipka | 0:13db8277ce26 | 10 | * furnished to do so, subject to the following conditions: |
hlipka | 0:13db8277ce26 | 11 | * |
hlipka | 0:13db8277ce26 | 12 | * The above copyright notice and this permission notice shall be included in |
hlipka | 0:13db8277ce26 | 13 | * all copies or substantial portions of the Software. |
hlipka | 0:13db8277ce26 | 14 | * |
hlipka | 0:13db8277ce26 | 15 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
hlipka | 0:13db8277ce26 | 16 | * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
hlipka | 0:13db8277ce26 | 17 | * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE |
hlipka | 0:13db8277ce26 | 18 | * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
hlipka | 0:13db8277ce26 | 19 | * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
hlipka | 0:13db8277ce26 | 20 | * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN |
hlipka | 0:13db8277ce26 | 21 | * THE SOFTWARE. |
hlipka | 0:13db8277ce26 | 22 | */ |
hlipka | 0:13db8277ce26 | 23 | |
hlipka | 0:13db8277ce26 | 24 | |
hlipka | 0:13db8277ce26 | 25 | #include "ASyncTicker.h" |
hlipka | 0:13db8277ce26 | 26 | |
hlipka | 0:13db8277ce26 | 27 | class TickerEntry |
hlipka | 0:13db8277ce26 | 28 | { |
hlipka | 0:13db8277ce26 | 29 | public: |
hlipka | 0:13db8277ce26 | 30 | Timer timer; |
hlipka | 0:13db8277ce26 | 31 | Updateable *target; |
hlipka | 0:13db8277ce26 | 32 | int period; |
hlipka | 0:13db8277ce26 | 33 | }; |
hlipka | 0:13db8277ce26 | 34 | |
hlipka | 0:13db8277ce26 | 35 | ASyncTicker::ASyncTicker() |
hlipka | 0:13db8277ce26 | 36 | { |
hlipka | 0:13db8277ce26 | 37 | } |
hlipka | 0:13db8277ce26 | 38 | |
hlipka | 0:13db8277ce26 | 39 | void ASyncTicker::addTarget(Updateable *target, int period) |
hlipka | 0:13db8277ce26 | 40 | { |
hlipka | 0:13db8277ce26 | 41 | TickerEntry *te=new TickerEntry(); |
hlipka | 0:13db8277ce26 | 42 | te->target=target; |
hlipka | 0:13db8277ce26 | 43 | te->period=period; |
hlipka | 0:13db8277ce26 | 44 | _entries.push_back(te); |
hlipka | 0:13db8277ce26 | 45 | } |
hlipka | 0:13db8277ce26 | 46 | |
hlipka | 0:13db8277ce26 | 47 | void ASyncTicker::run() |
hlipka | 0:13db8277ce26 | 48 | { |
hlipka | 0:13db8277ce26 | 49 | list<TickerEntry*>::iterator it; |
hlipka | 0:13db8277ce26 | 50 | for (it=_entries.begin();it!=_entries.end();it++) |
hlipka | 0:13db8277ce26 | 51 | { |
hlipka | 0:13db8277ce26 | 52 | TickerEntry *te=*it; |
hlipka | 0:13db8277ce26 | 53 | te->timer.reset(); |
hlipka | 0:13db8277ce26 | 54 | te->timer.start(); |
hlipka | 0:13db8277ce26 | 55 | } |
hlipka | 0:13db8277ce26 | 56 | while (true) |
hlipka | 0:13db8277ce26 | 57 | { |
hlipka | 0:13db8277ce26 | 58 | list<TickerEntry*>::iterator it; |
hlipka | 0:13db8277ce26 | 59 | for (it=_entries.begin();it!=_entries.end();it++) |
hlipka | 0:13db8277ce26 | 60 | { |
hlipka | 0:13db8277ce26 | 61 | TickerEntry *te=*it; |
hlipka | 0:13db8277ce26 | 62 | if (te->timer.read()>te->period) |
hlipka | 0:13db8277ce26 | 63 | { |
hlipka | 0:13db8277ce26 | 64 | te->target->update(); |
hlipka | 0:13db8277ce26 | 65 | te->timer.reset(); |
hlipka | 0:13db8277ce26 | 66 | } |
hlipka | 0:13db8277ce26 | 67 | } |
hlipka | 0:13db8277ce26 | 68 | wait(1); |
hlipka | 0:13db8277ce26 | 69 | } |
hlipka | 0:13db8277ce26 | 70 | } |
hlipka | 0:13db8277ce26 | 71 |