Lee Kai Xuan / mbed-os

mbed-os

Fork of mbed-os by erkin yucel

hal/ticker_api.h@1:3deb71413561, 2017-07-20 (annotated)

Committer:
xuaner
Date:
Thu Jul 20 14:26:57 2017 +0000
Revision:
1:3deb71413561
Parent:
0:f269e3021894 
mbed_os

Who changed what in which revision?

UserRevisionLine numberNew contents of line
elessair 0:f269e3021894 1
elessair 0:f269e3021894 2 /** \addtogroup hal */
elessair 0:f269e3021894 3 /** @{*/
elessair 0:f269e3021894 4 /* mbed Microcontroller Library
elessair 0:f269e3021894 5 * Copyright (c) 2015 ARM Limited
elessair 0:f269e3021894 6 *
elessair 0:f269e3021894 7 * Licensed under the Apache License, Version 2.0 (the "License");
elessair 0:f269e3021894 8 * you may not use this file except in compliance with the License.
elessair 0:f269e3021894 9 * You may obtain a copy of the License at
elessair 0:f269e3021894 10 *
elessair 0:f269e3021894 11 * http://www.apache.org/licenses/LICENSE-2.0
elessair 0:f269e3021894 12 *
elessair 0:f269e3021894 13 * Unless required by applicable law or agreed to in writing, software
elessair 0:f269e3021894 14 * distributed under the License is distributed on an "AS IS" BASIS,
elessair 0:f269e3021894 15 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
elessair 0:f269e3021894 16 * See the License for the specific language governing permissions and
elessair 0:f269e3021894 17 * limitations under the License.
elessair 0:f269e3021894 18 */
elessair 0:f269e3021894 19 #ifndef MBED_TICKER_API_H
elessair 0:f269e3021894 20 #define MBED_TICKER_API_H
elessair 0:f269e3021894 21
elessair 0:f269e3021894 22 #include <stdint.h>
elessair 0:f269e3021894 23 #include "device.h"
elessair 0:f269e3021894 24
elessair 0:f269e3021894 25 typedef uint32_t timestamp_t;
elessair 0:f269e3021894 26
elessair 0:f269e3021894 27 /** Ticker's event structure
elessair 0:f269e3021894 28 */
elessair 0:f269e3021894 29 typedef struct ticker_event_s {
elessair 0:f269e3021894 30 timestamp_t timestamp; /**< Event's timestamp */
elessair 0:f269e3021894 31 uint32_t id; /**< TimerEvent object */
elessair 0:f269e3021894 32 struct ticker_event_s *next; /**< Next event in the queue */
elessair 0:f269e3021894 33 } ticker_event_t;
elessair 0:f269e3021894 34
elessair 0:f269e3021894 35 typedef void (*ticker_event_handler)(uint32_t id);
elessair 0:f269e3021894 36
elessair 0:f269e3021894 37 /** Ticker's interface structure - required API for a ticker
elessair 0:f269e3021894 38 */
elessair 0:f269e3021894 39 typedef struct {
elessair 0:f269e3021894 40 void (*init)(void); /**< Init function */
elessair 0:f269e3021894 41 uint32_t (*read)(void); /**< Read function */
elessair 0:f269e3021894 42 void (*disable_interrupt)(void); /**< Disable interrupt function */
elessair 0:f269e3021894 43 void (*clear_interrupt)(void); /**< Clear interrupt function */
elessair 0:f269e3021894 44 void (*set_interrupt)(timestamp_t timestamp); /**< Set interrupt function */
elessair 0:f269e3021894 45 } ticker_interface_t;
elessair 0:f269e3021894 46
elessair 0:f269e3021894 47 /** Ticker's event queue structure
elessair 0:f269e3021894 48 */
elessair 0:f269e3021894 49 typedef struct {
elessair 0:f269e3021894 50 ticker_event_handler event_handler; /**< Event handler */
elessair 0:f269e3021894 51 ticker_event_t *head; /**< A pointer to head */
elessair 0:f269e3021894 52 } ticker_event_queue_t;
elessair 0:f269e3021894 53
elessair 0:f269e3021894 54 /** Ticker's data structure
elessair 0:f269e3021894 55 */
elessair 0:f269e3021894 56 typedef struct {
elessair 0:f269e3021894 57 const ticker_interface_t *interface; /**< Ticker's interface */
elessair 0:f269e3021894 58 ticker_event_queue_t *queue; /**< Ticker's event queue */
elessair 0:f269e3021894 59 } ticker_data_t;
elessair 0:f269e3021894 60
elessair 0:f269e3021894 61 #ifdef __cplusplus
elessair 0:f269e3021894 62 extern "C" {
elessair 0:f269e3021894 63 #endif
elessair 0:f269e3021894 64
elessair 0:f269e3021894 65 /**
elessair 0:f269e3021894 66 * \defgroup hal_ticker Ticker HAL functions
elessair 0:f269e3021894 67 * @{
elessair 0:f269e3021894 68 */
elessair 0:f269e3021894 69
elessair 0:f269e3021894 70 /** Initialize a ticker and set the event handler
elessair 0:f269e3021894 71 *
elessair 0:f269e3021894 72 * @param data The ticker's data
elessair 0:f269e3021894 73 * @param handler A handler to be set
elessair 0:f269e3021894 74 */
elessair 0:f269e3021894 75 void ticker_set_handler(const ticker_data_t *const data, ticker_event_handler handler);
elessair 0:f269e3021894 76
elessair 0:f269e3021894 77 /** IRQ handler that goes through the events to trigger overdue events.
elessair 0:f269e3021894 78 *
elessair 0:f269e3021894 79 * @param data The ticker's data
elessair 0:f269e3021894 80 */
elessair 0:f269e3021894 81 void ticker_irq_handler(const ticker_data_t *const data);
elessair 0:f269e3021894 82
elessair 0:f269e3021894 83 /** Remove an event from the queue
elessair 0:f269e3021894 84 *
elessair 0:f269e3021894 85 * @param data The ticker's data
elessair 0:f269e3021894 86 * @param obj The event object to be removed from the queue
elessair 0:f269e3021894 87 */
elessair 0:f269e3021894 88 void ticker_remove_event(const ticker_data_t *const data, ticker_event_t *obj);
elessair 0:f269e3021894 89
elessair 0:f269e3021894 90 /** Insert an event to the queue
elessair 0:f269e3021894 91 *
elessair 0:f269e3021894 92 * @param data The ticker's data
elessair 0:f269e3021894 93 * @param obj The event object to be inserted to the queue
elessair 0:f269e3021894 94 * @param timestamp The event's timestamp
elessair 0:f269e3021894 95 * @param id The event object
elessair 0:f269e3021894 96 */
elessair 0:f269e3021894 97 void ticker_insert_event(const ticker_data_t *const data, ticker_event_t *obj, timestamp_t timestamp, uint32_t id);
elessair 0:f269e3021894 98
elessair 0:f269e3021894 99 /** Read the current ticker's timestamp
elessair 0:f269e3021894 100 *
elessair 0:f269e3021894 101 * @param data The ticker's data
elessair 0:f269e3021894 102 * @return The current timestamp
elessair 0:f269e3021894 103 */
elessair 0:f269e3021894 104 timestamp_t ticker_read(const ticker_data_t *const data);
elessair 0:f269e3021894 105
elessair 0:f269e3021894 106 /** Read the next event's timestamp
elessair 0:f269e3021894 107 *
elessair 0:f269e3021894 108 * @param data The ticker's data
elessair 0:f269e3021894 109 * @return 1 if timestamp is pending event, 0 if there's no event pending
elessair 0:f269e3021894 110 */
elessair 0:f269e3021894 111 int ticker_get_next_timestamp(const ticker_data_t *const data, timestamp_t *timestamp);
elessair 0:f269e3021894 112
elessair 0:f269e3021894 113 /**@}*/
elessair 0:f269e3021894 114
elessair 0:f269e3021894 115 #ifdef __cplusplus
elessair 0:f269e3021894 116 }
elessair 0:f269e3021894 117 #endif
elessair 0:f269e3021894 118
elessair 0:f269e3021894 119 #endif
elessair 0:f269e3021894 120
elessair 0:f269e3021894 121 /** @}*/