mirror of https://github.com/ARMmbed/mbed-os.git
Martin Kojtal
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/*
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* Copyright (c) 2018-2019 Arm Limited and affiliates.
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* SPDX-License-Identifier: Apache-2.0
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifdef DEVICE_WATCHDOG
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#include "mbed_watchdog_mgr.h"
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static bool is_watchdog_started = false; //boolean to control watchdog start and stop
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#define MS_TO_US(x) ((x) * 1000) //macro to convert millisecond to microsecond
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static uint32_t elapsed_ms = (HW_WATCHDOG_TIMEOUT / 2);
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MBED_STATIC_ASSERT((HW_WATCHDOG_TIMEOUT > 0), "Timeout must be greater than zero");
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#if DEVICE_LPTICKER
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/** Create singleton instance of LowPowerTicker for watchdog periodic call back of kick.
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*/
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static SingletonPtr<mbed::LowPowerTicker> _ticker;
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#else
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/** Create singleton instance of Ticker for watchdog periodic call back of kick.
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*/
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static SingletonPtr<mbed::Ticker> _ticker;
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#endif
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/** Refreshes the watchdog timer.
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*
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* This function should be called periodically before the watchdog times out.
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* Otherwise, the system is reset.
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*
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* If the watchdog timer is not currently running this function does nothing
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*/
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static void mbed_wdog_manager_kick()
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{
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core_util_critical_section_enter();
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hal_watchdog_kick();
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// mbed watchdog manager will access the watchdog process method to verify
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// all registered users/threads in alive state */
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mbed::Watchdog::process(((elapsed_ms <= 0) ? 1 : elapsed_ms));
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core_util_critical_section_exit();
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}
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uint32_t mbed_wdog_manager_get_max_timeout()
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{
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const watchdog_features_t features = hal_watchdog_get_platform_features();
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return features.max_timeout;
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}
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bool mbed_wdog_manager_start()
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{
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watchdog_status_t sts;
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MBED_ASSERT(HW_WATCHDOG_TIMEOUT < mbed_wdog_manager_get_max_timeout());
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core_util_critical_section_enter();
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if (is_watchdog_started) {
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core_util_critical_section_exit();
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return false;
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}
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watchdog_config_t config;
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config.timeout_ms = HW_WATCHDOG_TIMEOUT;
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sts = hal_watchdog_init(&config);
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if (sts == WATCHDOG_STATUS_OK) {
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is_watchdog_started = true;
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}
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core_util_critical_section_exit();
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if (is_watchdog_started) {
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us_timestamp_t timeout = (MS_TO_US(((elapsed_ms <= 0) ? 1 : elapsed_ms)));
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_ticker->attach_us(mbed::callback(&mbed_wdog_manager_kick), timeout);
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}
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return is_watchdog_started;
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}
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bool mbed_wdog_manager_stop()
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{
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watchdog_status_t sts;
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bool msts = true;
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core_util_critical_section_enter();
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if (is_watchdog_started) {
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sts = hal_watchdog_stop();
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if (sts != WATCHDOG_STATUS_OK) {
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msts = false;
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} else {
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_ticker->detach();
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is_watchdog_started = false;
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}
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} else {
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msts = false;
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}
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core_util_critical_section_exit();
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return msts;
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}
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uint32_t mbed_wdog_manager_get_timeout()
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{
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return hal_watchdog_get_reload_value();
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}
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#endif // DEVICE_WATCHDOG
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@ -1,97 +0,0 @@
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/*
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* Copyright (c) 2018-2019 Arm Limited and affiliates.
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* SPDX-License-Identifier: Apache-2.0
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#ifndef MBED_WATCHDOG_MGR_H
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#define MBED_WATCHDOG_MGR_H
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#ifdef DEVICE_WATCHDOG
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#include "watchdog_api.h"
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#include "mbed_error.h"
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#include "platform/Callback.h"
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#include "platform/mbed_critical.h"
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#include "platform/SingletonPtr.h"
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#if DEVICE_LPTICKER
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#include "LowPowerTicker.h"
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#else
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#include "Ticker.h"
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#endif
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#include "Watchdog.h"
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#ifdef __cplusplus
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extern "C" {
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#endif
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/** \addtogroup platform */
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/** A system timer that will reset the system in the case of system failures or
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* malfunctions.
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*
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* Example:
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* @code
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*
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* mbed_wdog_manager_start();
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*
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* while (true) {
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* wait(0.3);
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*
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* }
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* @endcode
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* @ingroup platform
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*/
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/** Start an independent watchdog timer
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*
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*
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* @return status true if the watchdog timer was started
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* successfully. assert if one of the input parameters is out of range for the current platform.
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* false if watchdog timer was not started
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*/
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bool mbed_wdog_manager_start();
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/** Stops the watchdog timer
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*
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* Calling this function will attempt to disable any currently running
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* watchdog timers if supported by the current platform.
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*
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* @return Returns true if the watchdog timer was successfully
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* stopped, Returns false if the watchdog cannot be disabled
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* on the current platform or if the timer was never started.
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*/
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bool mbed_wdog_manager_stop();
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/** Get the watchdog timer refresh value
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*
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* This function returns the refresh timeout of the watchdog timer.
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*
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* @return Reload value for the watchdog timer in milliseconds.
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*/
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uint32_t mbed_wdog_manager_get_timeout();
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/** Get the maximum refresh value for the current platform in milliseconds
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*
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* @return Maximum refresh value supported by the watchdog for the current
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* platform in milliseconds
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*/
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uint32_t mbed_wdog_manager_get_max_timeout();
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#ifdef __cplusplus
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}
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#endif
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#endif // DEVICE_WATCHDOG
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#endif // MBED_WATCHDOG_H
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