mbed_lp_ticker_wrapper.cpp

00001 /* mbed Microcontroller Library
00002  * Copyright (c) 2018 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/mbed_lp_ticker_wrapper.h"
00018 
00019 #if DEVICE_LPTICKER && (LPTICKER_DELAY_TICKS > 0)
00020 
00021 #include "hal/LowPowerTickerWrapper.h"
00022 #include "platform/mbed_critical.h"
00023 
00024 // Do not use SingletonPtr since this must be initialized in a critical section
00025 static LowPowerTickerWrapper *ticker_wrapper;
00026 static uint64_t ticker_wrapper_data[(sizeof(LowPowerTickerWrapper) + 7) / 8];
00027 static bool init = false;
00028 
00029 static void lp_ticker_wrapper_init()
00030 {
00031     ticker_wrapper->init();
00032 }
00033 
00034 static uint32_t lp_ticker_wrapper_read()
00035 {
00036     return ticker_wrapper->read();
00037 }
00038 
00039 static void lp_ticker_wrapper_set_interrupt(timestamp_t timestamp)
00040 {
00041     ticker_wrapper->set_interrupt(timestamp);
00042 }
00043 
00044 static void lp_ticker_wrapper_disable_interrupt()
00045 {
00046     ticker_wrapper->disable_interrupt();
00047 }
00048 
00049 static void lp_ticker_wrapper_clear_interrupt()
00050 {
00051     ticker_wrapper->clear_interrupt();
00052 }
00053 
00054 static void lp_ticker_wrapper_fire_interrupt()
00055 {
00056     ticker_wrapper->fire_interrupt();
00057 }
00058 
00059 static const ticker_info_t *lp_ticker_wrapper_get_info()
00060 {
00061     return ticker_wrapper->get_info();
00062 }
00063 
00064 static void lp_ticker_wrapper_free()
00065 {
00066     ticker_wrapper->free();
00067 }
00068 
00069 static const ticker_interface_t lp_interface = {
00070     lp_ticker_wrapper_init,
00071     lp_ticker_wrapper_read,
00072     lp_ticker_wrapper_disable_interrupt,
00073     lp_ticker_wrapper_clear_interrupt,
00074     lp_ticker_wrapper_set_interrupt,
00075     lp_ticker_wrapper_fire_interrupt,
00076     lp_ticker_wrapper_free,
00077     lp_ticker_wrapper_get_info,
00078     true
00079 };
00080 
00081 void lp_ticker_wrapper_irq_handler(ticker_irq_handler_type handler)
00082 {
00083     core_util_critical_section_enter();
00084 
00085     if (!init) {
00086         // Force ticker to initialize
00087         get_lp_ticker_data();
00088     }
00089 
00090     ticker_wrapper->irq_handler(handler);
00091 
00092     core_util_critical_section_exit();
00093 }
00094 
00095 const ticker_data_t *get_lp_ticker_wrapper_data(const ticker_data_t *data)
00096 {
00097     core_util_critical_section_enter();
00098 
00099     if (!init) {
00100         ticker_wrapper = new (ticker_wrapper_data) LowPowerTickerWrapper(data, &lp_interface, LPTICKER_DELAY_TICKS, LPTICKER_DELAY_TICKS);
00101         init = true;
00102     }
00103 
00104     core_util_critical_section_exit();
00105 
00106     return &ticker_wrapper->data;
00107 }
00108 
00109 void lp_ticker_wrapper_suspend()
00110 {
00111     if (!init) {
00112         // Force ticker to initialize
00113         get_lp_ticker_data();
00114     }
00115 
00116     ticker_wrapper->suspend();
00117 }
00118 
00119 void lp_ticker_wrapper_resume()
00120 {
00121     if (!init) {
00122         // Force ticker to initialize
00123         get_lp_ticker_data();
00124     }
00125 
00126     ticker_wrapper->resume();
00127 }
00128 
00129 #endif