mbed_lp_ticker_wrapper.cpp

00001 /* mbed Microcontroller Library
00002  * Copyright (c) 2018 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/mbed_lp_ticker_wrapper.h"
00017 
00018 #if DEVICE_LPTICKER && (LPTICKER_DELAY_TICKS > 0)
00019 
00020 #include "hal/LowPowerTickerWrapper.h"
00021 #include "platform/mbed_critical.h"
00022 
00023 // Do not use SingletonPtr since this must be initialized in a critical section
00024 static LowPowerTickerWrapper *ticker_wrapper;
00025 static uint64_t ticker_wrapper_data[(sizeof(LowPowerTickerWrapper) + 7) / 8];
00026 static bool init = false;
00027 
00028 static void lp_ticker_wrapper_init()
00029 {
00030     ticker_wrapper->init();
00031 }
00032 
00033 static uint32_t lp_ticker_wrapper_read()
00034 {
00035     return ticker_wrapper->read();
00036 }
00037 
00038 static void lp_ticker_wrapper_set_interrupt(timestamp_t timestamp)
00039 {
00040     ticker_wrapper->set_interrupt(timestamp);
00041 }
00042 
00043 static void lp_ticker_wrapper_disable_interrupt()
00044 {
00045     ticker_wrapper->disable_interrupt();
00046 }
00047 
00048 static void lp_ticker_wrapper_clear_interrupt()
00049 {
00050     ticker_wrapper->clear_interrupt();
00051 }
00052 
00053 static void lp_ticker_wrapper_fire_interrupt()
00054 {
00055     ticker_wrapper->fire_interrupt();
00056 }
00057 
00058 static const ticker_info_t *lp_ticker_wrapper_get_info()
00059 {
00060     return ticker_wrapper->get_info();
00061 }
00062 
00063 static void lp_ticker_wrapper_free()
00064 {
00065     ticker_wrapper->free();
00066 }
00067 
00068 static const ticker_interface_t lp_interface = {
00069     lp_ticker_wrapper_init,
00070     lp_ticker_wrapper_read,
00071     lp_ticker_wrapper_disable_interrupt,
00072     lp_ticker_wrapper_clear_interrupt,
00073     lp_ticker_wrapper_set_interrupt,
00074     lp_ticker_wrapper_fire_interrupt,
00075     lp_ticker_wrapper_free,
00076     lp_ticker_wrapper_get_info
00077 };
00078 
00079 void lp_ticker_wrapper_irq_handler(ticker_irq_handler_type handler)
00080 {
00081     core_util_critical_section_enter();
00082 
00083     if (!init) {
00084         // Force ticker to initialize
00085         get_lp_ticker_data();
00086     }
00087 
00088     ticker_wrapper->irq_handler(handler);
00089 
00090     core_util_critical_section_exit();
00091 }
00092 
00093 const ticker_data_t *get_lp_ticker_wrapper_data(const ticker_data_t *data)
00094 {
00095     core_util_critical_section_enter();
00096 
00097     if (!init) {
00098         ticker_wrapper = new (ticker_wrapper_data) LowPowerTickerWrapper(data, &lp_interface, LPTICKER_DELAY_TICKS, LPTICKER_DELAY_TICKS);
00099         init = true;
00100     }
00101 
00102     core_util_critical_section_exit();
00103 
00104     return &ticker_wrapper->data;
00105 }
00106 
00107 void lp_ticker_wrapper_suspend()
00108 {
00109     if (!init) {
00110         // Force ticker to initialize
00111         get_lp_ticker_data();
00112     }
00113 
00114     ticker_wrapper->suspend();
00115 }
00116 
00117 void lp_ticker_wrapper_resume()
00118 {
00119     if (!init) {
00120         // Force ticker to initialize
00121         get_lp_ticker_data();
00122     }
00123 
00124     ticker_wrapper->resume();
00125 }
00126 
00127 #endif