mbed library sources. Supersedes mbed-src.

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Show/hide line numbers mbed_lp_ticker_wrapper.cpp Source File

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 };
00079 
00080 void lp_ticker_wrapper_irq_handler(ticker_irq_handler_type handler)
00081 {
00082     core_util_critical_section_enter();
00083 
00084     if (!init) {
00085         // Force ticker to initialize
00086         get_lp_ticker_data();
00087     }
00088 
00089     ticker_wrapper->irq_handler(handler);
00090 
00091     core_util_critical_section_exit();
00092 }
00093 
00094 const ticker_data_t *get_lp_ticker_wrapper_data(const ticker_data_t *data)
00095 {
00096     core_util_critical_section_enter();
00097 
00098     if (!init) {
00099         ticker_wrapper = new (ticker_wrapper_data) LowPowerTickerWrapper(data, &lp_interface, LPTICKER_DELAY_TICKS, LPTICKER_DELAY_TICKS);
00100         init = true;
00101     }
00102 
00103     core_util_critical_section_exit();
00104 
00105     return &ticker_wrapper->data;
00106 }
00107 
00108 void lp_ticker_wrapper_suspend()
00109 {
00110     if (!init) {
00111         // Force ticker to initialize
00112         get_lp_ticker_data();
00113     }
00114 
00115     ticker_wrapper->suspend();
00116 }
00117 
00118 void lp_ticker_wrapper_resume()
00119 {
00120     if (!init) {
00121         // Force ticker to initialize
00122         get_lp_ticker_data();
00123     }
00124 
00125     ticker_wrapper->resume();
00126 }
00127 
00128 #endif