mbed_lp_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/lp_ticker_api.h"
00017 
00018 #if DEVICE_LOWPOWERTIMER
00019 
00020 void lp_ticker_set_interrupt_wrapper(timestamp_t timestamp);
00021 
00022 static ticker_event_queue_t events = { 0 };
00023 
00024 static ticker_irq_handler_type irq_handler = ticker_irq_handler;
00025 
00026 static const ticker_interface_t lp_interface = {
00027     .init = lp_ticker_init,
00028     .read = lp_ticker_read,
00029     .disable_interrupt = lp_ticker_disable_interrupt,
00030     .clear_interrupt = lp_ticker_clear_interrupt,
00031 #if LOWPOWERTIMER_DELAY_TICKS > 0
00032     .set_interrupt = lp_ticker_set_interrupt_wrapper,
00033 #else
00034     .set_interrupt = lp_ticker_set_interrupt,
00035 #endif
00036     .fire_interrupt = lp_ticker_fire_interrupt,
00037     .get_info = lp_ticker_get_info,
00038 };
00039 
00040 static const ticker_data_t lp_data = {
00041     .interface = &lp_interface,
00042     .queue = &events,
00043 };
00044 
00045 const ticker_data_t* get_lp_ticker_data(void)
00046 {
00047     return &lp_data;
00048 }
00049 
00050 ticker_irq_handler_type set_lp_ticker_irq_handler(ticker_irq_handler_type ticker_irq_handler)
00051 {
00052     ticker_irq_handler_type prev_irq_handler = irq_handler;
00053 
00054     irq_handler = ticker_irq_handler;
00055 
00056     return prev_irq_handler;
00057 }
00058 
00059 void lp_ticker_irq_handler(void)
00060 {
00061     if (irq_handler) {
00062         irq_handler(&lp_data);
00063     }
00064 }
00065 
00066 #endif