Bei Chen Liu / mbed-src

mbed library sources

Fork of mbed-src by 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
Child:
525:c320967f86b9
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?

UserRevisionLine numberNew 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