mbed_us_ticker_api.c

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