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 #include "hal/mbed_lp_ticker_wrapper.h"
00018 
00019 #if DEVICE_LPTICKER
00020 
00021 static ticker_event_queue_t events = { 0 };
00022 
00023 static ticker_irq_handler_type irq_handler = ticker_irq_handler;
00024 
00025 static const ticker_interface_t lp_interface = {
00026     .init = lp_ticker_init,
00027     .read = lp_ticker_read,
00028     .disable_interrupt = lp_ticker_disable_interrupt,
00029     .clear_interrupt = lp_ticker_clear_interrupt,
00030     .set_interrupt = lp_ticker_set_interrupt,
00031     .fire_interrupt = lp_ticker_fire_interrupt,
00032     .get_info = lp_ticker_get_info,
00033     .free = lp_ticker_free,
00034 };
00035 
00036 static const ticker_data_t lp_data = {
00037     .interface = &lp_interface,
00038     .queue = &events,
00039 };
00040 
00041 const ticker_data_t *get_lp_ticker_data(void)
00042 {
00043 #if LPTICKER_DELAY_TICKS > 0
00044     return get_lp_ticker_wrapper_data(&lp_data);
00045 #else
00046     return &lp_data;
00047 #endif
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 LPTICKER_DELAY_TICKS > 0
00062     lp_ticker_wrapper_irq_handler(irq_handler);
00063 #else
00064     if (irq_handler) {
00065         irq_handler(&lp_data);
00066     }
00067 #endif
00068 }
00069 
00070 #endif