shao ziyang
mbed library sources
Dependents: frdm_kl05z_gpio_test
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mbed official
common/TimerEvent.cpp@304:89b9c3a9a045, 2014-08-29 (annotated)
- Committer:
- mbed_official
- Date:
- Fri Aug 29 17:15:07 2014 +0100
- Revision:
- 304:89b9c3a9a045
- Parent:
- 212:34d62c0b2af6
Synchronized with git revision 734f365d7da26ef199751f4b0d91611479b495ea
Full URL: https://github.com/mbedmicro/mbed/commit/734f365d7da26ef199751f4b0d91611479b495ea/
1. timestamp_t as an abstraction for time values managed by
Ticker. Using uint64_t for timestamp_t allows a wraparound-free
Ticker. This change forces us to update the definitions of usTicker
for all platforms; but the changes beyond nRF51822 aren't major.
2. reduce power consumption on the nRF51822 by removing the need for
the high-frequency processor timer; and reimplementing it using the
RTC.
I've also replaced high-frequency clock with low-frequency external
clock during system startup of the nRF51822. This brings a major win
in power consumption.
Who changed what in which revision?
| User | Revision | Line number | New contents of line |
|---|---|---|---|
| bogdanm | 13:0645d8841f51 | 1 | /* mbed Microcontroller Library |
| bogdanm | 13:0645d8841f51 | 2 | * Copyright (c) 2006-2013 ARM Limited |
| bogdanm | 13:0645d8841f51 | 3 | * |
| bogdanm | 13:0645d8841f51 | 4 | * Licensed under the Apache License, Version 2.0 (the "License"); |
| bogdanm | 13:0645d8841f51 | 5 | * you may not use this file except in compliance with the License. |
| bogdanm | 13:0645d8841f51 | 6 | * You may obtain a copy of the License at |
| bogdanm | 13:0645d8841f51 | 7 | * |
| bogdanm | 13:0645d8841f51 | 8 | * http://www.apache.org/licenses/LICENSE-2.0 |
| bogdanm | 13:0645d8841f51 | 9 | * |
| bogdanm | 13:0645d8841f51 | 10 | * Unless required by applicable law or agreed to in writing, software |
| bogdanm | 13:0645d8841f51 | 11 | * distributed under the License is distributed on an "AS IS" BASIS, |
| bogdanm | 13:0645d8841f51 | 12 | * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| bogdanm | 13:0645d8841f51 | 13 | * See the License for the specific language governing permissions and |
| bogdanm | 13:0645d8841f51 | 14 | * limitations under the License. |
| bogdanm | 13:0645d8841f51 | 15 | */ |
| bogdanm | 13:0645d8841f51 | 16 | #include "TimerEvent.h" |
| bogdanm | 13:0645d8841f51 | 17 | #include "cmsis.h" |
| bogdanm | 13:0645d8841f51 | 18 | |
| bogdanm | 13:0645d8841f51 | 19 | #include <stddef.h> |
| bogdanm | 13:0645d8841f51 | 20 | |
| bogdanm | 13:0645d8841f51 | 21 | namespace mbed { |
| bogdanm | 13:0645d8841f51 | 22 | |
| mbed_official | 212:34d62c0b2af6 | 23 | TimerEvent::TimerEvent() : event() { |
| bogdanm | 13:0645d8841f51 | 24 | us_ticker_set_handler((&TimerEvent::irq)); |
| bogdanm | 13:0645d8841f51 | 25 | } |
| bogdanm | 13:0645d8841f51 | 26 | |
| bogdanm | 13:0645d8841f51 | 27 | void TimerEvent::irq(uint32_t id) { |
| bogdanm | 13:0645d8841f51 | 28 | TimerEvent *timer_event = (TimerEvent*)id; |
| bogdanm | 13:0645d8841f51 | 29 | timer_event->handler(); |
| bogdanm | 13:0645d8841f51 | 30 | } |
| bogdanm | 13:0645d8841f51 | 31 | |
| bogdanm | 13:0645d8841f51 | 32 | TimerEvent::~TimerEvent() { |
| bogdanm | 13:0645d8841f51 | 33 | remove(); |
| bogdanm | 13:0645d8841f51 | 34 | } |
| bogdanm | 13:0645d8841f51 | 35 | |
| bogdanm | 13:0645d8841f51 | 36 | // insert in to linked list |
| mbed_official | 304:89b9c3a9a045 | 37 | void TimerEvent::insert(timestamp_t timestamp) { |
| bogdanm | 13:0645d8841f51 | 38 | us_ticker_insert_event(&event, timestamp, (uint32_t)this); |
| bogdanm | 13:0645d8841f51 | 39 | } |
| bogdanm | 13:0645d8841f51 | 40 | |
| bogdanm | 13:0645d8841f51 | 41 | void TimerEvent::remove() { |
| bogdanm | 13:0645d8841f51 | 42 | us_ticker_remove_event(&event); |
| bogdanm | 13:0645d8841f51 | 43 | } |
| bogdanm | 13:0645d8841f51 | 44 | |
| bogdanm | 13:0645d8841f51 | 45 | } // namespace mbed |