mbed_us_ticker_api.c

00001 /* mbed Microcontroller Library
00002  * Copyright (c) 2015 ARM Limited
00003  * SPDX-License-Identifier: Apache-2.0
00004  *
00005  * Licensed under the Apache License, Version 2.0 (the "License");
00006  * you may not use this file except in compliance with the License.
00007  * You may obtain a copy of the License at
00008  *
00009  *     http://www.apache.org/licenses/LICENSE-2.0
00010  *
00011  * Unless required by applicable law or agreed to in writing, software
00012  * distributed under the License is distributed on an "AS IS" BASIS,
00013  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
00014  * See the License for the specific language governing permissions and
00015  * limitations under the License.
00016  */
00017 #include "hal/us_ticker_api.h"
00018 
00019 static ticker_event_queue_t events = { 0 };
00020 
00021 static ticker_irq_handler_type irq_handler = ticker_irq_handler;
00022 
00023 static const ticker_interface_t us_interface = {
00024     .init = us_ticker_init,
00025     .read = us_ticker_read,
00026     .disable_interrupt = us_ticker_disable_interrupt,
00027     .clear_interrupt = us_ticker_clear_interrupt,
00028     .set_interrupt = us_ticker_set_interrupt,
00029     .fire_interrupt = us_ticker_fire_interrupt,
00030     .get_info = us_ticker_get_info,
00031     .free = us_ticker_free,
00032 };
00033 
00034 static const ticker_data_t us_data = {
00035     .interface = &us_interface,
00036     .queue = &events
00037 };
00038 
00039 const ticker_data_t *get_us_ticker_data(void)
00040 {
00041     return &us_data;
00042 }
00043 
00044 ticker_irq_handler_type set_us_ticker_irq_handler(ticker_irq_handler_type ticker_irq_handler)
00045 {
00046     ticker_irq_handler_type prev_irq_handler = irq_handler;
00047 
00048     irq_handler = ticker_irq_handler;
00049 
00050     return prev_irq_handler;
00051 }
00052 
00053 void us_ticker_irq_handler(void)
00054 {
00055     if (irq_handler) {
00056         irq_handler(&us_data);
00057     }
00058 }