zain aftab / mbed-src3

mbed library sources

Dependents:   RPC_Serial_V_mac

hal/us_ticker_api.h@304:89b9c3a9a045, 2014-08-29 (annotated)

Committer:
mbed_official
Date:
Fri Aug 29 17:15:07 2014 +0100
Revision:
304:89b9c3a9a045
Parent:
13:0645d8841f51
Child:
453:a2b30f7d1bc5
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 #ifndef MBED_US_TICKER_API_H
bogdanm 13:0645d8841f51 17 #define MBED_US_TICKER_API_H
bogdanm 13:0645d8841f51 18
bogdanm 13:0645d8841f51 19 #include <stdint.h>
bogdanm 13:0645d8841f51 20
bogdanm 13:0645d8841f51 21 #ifdef __cplusplus
bogdanm 13:0645d8841f51 22 extern "C" {
bogdanm 13:0645d8841f51 23 #endif
bogdanm 13:0645d8841f51 24
mbed_official 304:89b9c3a9a045 25 typedef uint64_t timestamp_t;
mbed_official 304:89b9c3a9a045 26
bogdanm 13:0645d8841f51 27 uint32_t us_ticker_read(void);
bogdanm 13:0645d8841f51 28
bogdanm 13:0645d8841f51 29 typedef void (*ticker_event_handler)(uint32_t id);
bogdanm 13:0645d8841f51 30 void us_ticker_set_handler(ticker_event_handler handler);
bogdanm 13:0645d8841f51 31
bogdanm 13:0645d8841f51 32 typedef struct ticker_event_s {
mbed_official 304:89b9c3a9a045 33 timestamp_t timestamp;
mbed_official 304:89b9c3a9a045 34 uint32_t id;
bogdanm 13:0645d8841f51 35 struct ticker_event_s *next;
bogdanm 13:0645d8841f51 36 } ticker_event_t;
bogdanm 13:0645d8841f51 37
bogdanm 13:0645d8841f51 38 void us_ticker_init(void);
mbed_official 304:89b9c3a9a045 39 void us_ticker_set_interrupt(timestamp_t timestamp);
bogdanm 13:0645d8841f51 40 void us_ticker_disable_interrupt(void);
bogdanm 13:0645d8841f51 41 void us_ticker_clear_interrupt(void);
bogdanm 13:0645d8841f51 42 void us_ticker_irq_handler(void);
bogdanm 13:0645d8841f51 43
mbed_official 304:89b9c3a9a045 44 void us_ticker_insert_event(ticker_event_t *obj, timestamp_t timestamp, uint32_t id);
bogdanm 13:0645d8841f51 45 void us_ticker_remove_event(ticker_event_t *obj);
bogdanm 13:0645d8841f51 46
bogdanm 13:0645d8841f51 47 #ifdef __cplusplus
bogdanm 13:0645d8841f51 48 }
bogdanm 13:0645d8841f51 49 #endif
bogdanm 13:0645d8841f51 50
bogdanm 13:0645d8841f51 51 #endif