Johannes Stratmann / mbed-dev

added prescaler for 16 bit pwm in LPC1347 target

Fork of mbed-dev by mbed official

hal/ticker_api.h@147:ba84b7dc41a7, 2016-09-10 (annotated)

Committer:
JojoS
Date:
Sat Sep 10 15:32:04 2016 +0000
Revision:
147:ba84b7dc41a7
Parent:
144:ef7eb2e8f9f7 
added prescaler for 16 bit timers (solution as in LPC11xx), default prescaler 31 for max 28 ms period time

Who changed what in which revision?

UserRevisionLine numberNew contents of line
<> 144:ef7eb2e8f9f7 1 /* mbed Microcontroller Library
<> 144:ef7eb2e8f9f7 2 * Copyright (c) 2015 ARM Limited
<> 144:ef7eb2e8f9f7 3 *
<> 144:ef7eb2e8f9f7 4 * Licensed under the Apache License, Version 2.0 (the "License");
<> 144:ef7eb2e8f9f7 5 * you may not use this file except in compliance with the License.
<> 144:ef7eb2e8f9f7 6 * You may obtain a copy of the License at
<> 144:ef7eb2e8f9f7 7 *
<> 144:ef7eb2e8f9f7 8 * http://www.apache.org/licenses/LICENSE-2.0
<> 144:ef7eb2e8f9f7 9 *
<> 144:ef7eb2e8f9f7 10 * Unless required by applicable law or agreed to in writing, software
<> 144:ef7eb2e8f9f7 11 * distributed under the License is distributed on an "AS IS" BASIS,
<> 144:ef7eb2e8f9f7 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
<> 144:ef7eb2e8f9f7 13 * See the License for the specific language governing permissions and
<> 144:ef7eb2e8f9f7 14 * limitations under the License.
<> 144:ef7eb2e8f9f7 15 */
<> 144:ef7eb2e8f9f7 16 #ifndef MBED_TICKER_API_H
<> 144:ef7eb2e8f9f7 17 #define MBED_TICKER_API_H
<> 144:ef7eb2e8f9f7 18
<> 144:ef7eb2e8f9f7 19 #include <stdint.h>
<> 144:ef7eb2e8f9f7 20 #include "device.h"
<> 144:ef7eb2e8f9f7 21
<> 144:ef7eb2e8f9f7 22 typedef uint32_t timestamp_t;
<> 144:ef7eb2e8f9f7 23
<> 144:ef7eb2e8f9f7 24 /** Ticker's event structure
<> 144:ef7eb2e8f9f7 25 */
<> 144:ef7eb2e8f9f7 26 typedef struct ticker_event_s {
<> 144:ef7eb2e8f9f7 27 timestamp_t timestamp; /**< Event's timestamp */
<> 144:ef7eb2e8f9f7 28 uint32_t id; /**< TimerEvent object */
<> 144:ef7eb2e8f9f7 29 struct ticker_event_s *next; /**< Next event in the queue */
<> 144:ef7eb2e8f9f7 30 } ticker_event_t;
<> 144:ef7eb2e8f9f7 31
<> 144:ef7eb2e8f9f7 32 typedef void (*ticker_event_handler)(uint32_t id);
<> 144:ef7eb2e8f9f7 33
<> 144:ef7eb2e8f9f7 34 /** Ticker's interface structure - required API for a ticker
<> 144:ef7eb2e8f9f7 35 */
<> 144:ef7eb2e8f9f7 36 typedef struct {
<> 144:ef7eb2e8f9f7 37 void (*init)(void); /**< Init function */
<> 144:ef7eb2e8f9f7 38 uint32_t (*read)(void); /**< Read function */
<> 144:ef7eb2e8f9f7 39 void (*disable_interrupt)(void); /**< Disable interrupt function */
<> 144:ef7eb2e8f9f7 40 void (*clear_interrupt)(void); /**< Clear interrupt function */
<> 144:ef7eb2e8f9f7 41 void (*set_interrupt)(timestamp_t timestamp); /**< Set interrupt function */
<> 144:ef7eb2e8f9f7 42 } ticker_interface_t;
<> 144:ef7eb2e8f9f7 43
<> 144:ef7eb2e8f9f7 44 /** Ticker's event queue structure
<> 144:ef7eb2e8f9f7 45 */
<> 144:ef7eb2e8f9f7 46 typedef struct {
<> 144:ef7eb2e8f9f7 47 ticker_event_handler event_handler; /**< Event handler */
<> 144:ef7eb2e8f9f7 48 ticker_event_t *head; /**< A pointer to head */
<> 144:ef7eb2e8f9f7 49 } ticker_event_queue_t;
<> 144:ef7eb2e8f9f7 50
<> 144:ef7eb2e8f9f7 51 /** Ticker's data structure
<> 144:ef7eb2e8f9f7 52 */
<> 144:ef7eb2e8f9f7 53 typedef struct {
<> 144:ef7eb2e8f9f7 54 const ticker_interface_t *interface; /**< Ticker's interface */
<> 144:ef7eb2e8f9f7 55 ticker_event_queue_t *queue; /**< Ticker's event queue */
<> 144:ef7eb2e8f9f7 56 } ticker_data_t;
<> 144:ef7eb2e8f9f7 57
<> 144:ef7eb2e8f9f7 58 #ifdef __cplusplus
<> 144:ef7eb2e8f9f7 59 extern "C" {
<> 144:ef7eb2e8f9f7 60 #endif
<> 144:ef7eb2e8f9f7 61
<> 144:ef7eb2e8f9f7 62 /**
<> 144:ef7eb2e8f9f7 63 * \defgroup hal_ticker Ticker HAL functions
<> 144:ef7eb2e8f9f7 64 * @{
<> 144:ef7eb2e8f9f7 65 */
<> 144:ef7eb2e8f9f7 66
<> 144:ef7eb2e8f9f7 67 /** Initialize a ticker and set the event handler
<> 144:ef7eb2e8f9f7 68 *
<> 144:ef7eb2e8f9f7 69 * @param data The ticker's data
<> 144:ef7eb2e8f9f7 70 * @param handler A handler to be set
<> 144:ef7eb2e8f9f7 71 */
<> 144:ef7eb2e8f9f7 72 void ticker_set_handler(const ticker_data_t *const data, ticker_event_handler handler);
<> 144:ef7eb2e8f9f7 73
<> 144:ef7eb2e8f9f7 74 /** IRQ handler that goes through the events to trigger overdue events.
<> 144:ef7eb2e8f9f7 75 *
<> 144:ef7eb2e8f9f7 76 * @param data The ticker's data
<> 144:ef7eb2e8f9f7 77 */
<> 144:ef7eb2e8f9f7 78 void ticker_irq_handler(const ticker_data_t *const data);
<> 144:ef7eb2e8f9f7 79
<> 144:ef7eb2e8f9f7 80 /** Remove an event from the queue
<> 144:ef7eb2e8f9f7 81 *
<> 144:ef7eb2e8f9f7 82 * @param data The ticker's data
<> 144:ef7eb2e8f9f7 83 * @param obj The event object to be removed from the queue
<> 144:ef7eb2e8f9f7 84 */
<> 144:ef7eb2e8f9f7 85 void ticker_remove_event(const ticker_data_t *const data, ticker_event_t *obj);
<> 144:ef7eb2e8f9f7 86
<> 144:ef7eb2e8f9f7 87 /** Insert an event to the queue
<> 144:ef7eb2e8f9f7 88 *
<> 144:ef7eb2e8f9f7 89 * @param data The ticker's data
<> 144:ef7eb2e8f9f7 90 * @param obj The event object to be inserted to the queue
<> 144:ef7eb2e8f9f7 91 * @param timestamp The event's timestamp
<> 144:ef7eb2e8f9f7 92 * @param id The event object
<> 144:ef7eb2e8f9f7 93 */
<> 144:ef7eb2e8f9f7 94 void ticker_insert_event(const ticker_data_t *const data, ticker_event_t *obj, timestamp_t timestamp, uint32_t id);
<> 144:ef7eb2e8f9f7 95
<> 144:ef7eb2e8f9f7 96 /** Read the current ticker's timestamp
<> 144:ef7eb2e8f9f7 97 *
<> 144:ef7eb2e8f9f7 98 * @param data The ticker's data
<> 144:ef7eb2e8f9f7 99 * @return The current timestamp
<> 144:ef7eb2e8f9f7 100 */
<> 144:ef7eb2e8f9f7 101 timestamp_t ticker_read(const ticker_data_t *const data);
<> 144:ef7eb2e8f9f7 102
<> 144:ef7eb2e8f9f7 103 /** Read the next event's timestamp
<> 144:ef7eb2e8f9f7 104 *
<> 144:ef7eb2e8f9f7 105 * @param data The ticker's data
<> 144:ef7eb2e8f9f7 106 * @return 1 if timestamp is pending event, 0 if there's no event pending
<> 144:ef7eb2e8f9f7 107 */
<> 144:ef7eb2e8f9f7 108 int ticker_get_next_timestamp(const ticker_data_t *const data, timestamp_t *timestamp);
<> 144:ef7eb2e8f9f7 109
<> 144:ef7eb2e8f9f7 110 /**@}*/
<> 144:ef7eb2e8f9f7 111
<> 144:ef7eb2e8f9f7 112 #ifdef __cplusplus
<> 144:ef7eb2e8f9f7 113 }
<> 144:ef7eb2e8f9f7 114 #endif
<> 144:ef7eb2e8f9f7 115
<> 144:ef7eb2e8f9f7 116 #endif