RTC auf true
rtos/TARGET_CORTEX/SysTimer.h
- Committer:
- kevman
- Date:
- 2019-03-13
- Revision:
- 2:7aab896b1a3b
- Parent:
- 0:38ceb79fef03
File content as of revision 2:7aab896b1a3b:
/* mbed Microcontroller Library * Copyright (c) 2006-2012 ARM Limited * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE * SOFTWARE. */ #ifndef MBED_SYS_TIMER_H #define MBED_SYS_TIMER_H #if defined(DEVICE_LPTICKER) || defined(DOXYGEN_ONLY) #include "platform/NonCopyable.h" #include "drivers/TimerEvent.h" namespace rtos { namespace internal { /** * @cond RTOS_INTERNAL * * @addtogroup rtos * @{ * * @defgroup rtos_SysTimer SysTimer class * @{ */ /** * The SysTimer class is used exclusively by RTX idle loop in TICKLESS mode. * * @note SysTimer is not the part of Mbed RTOS API. */ class SysTimer: private mbed::TimerEvent, private mbed::NonCopyable<SysTimer> { public: SysTimer(); SysTimer(const ticker_data_t *data); virtual ~SysTimer(); /** * Enable an IRQ/SysTick with the correct priority. */ static void setup_irq(); /** * Set wakeup time and schedule a wakeup event after delta ticks * * After suspend has been called the function suspend_time_passed * can be used to determine if the suspend time has passed. * * @param delta Ticks to remain suspended */ void suspend(uint32_t delta); /** * Check if the suspend time has passed * * @return true if the specified number of ticks has passed otherwise false */ bool suspend_time_passed(); /** * Exit suspend mode and return elapsed ticks * * Due to a scheduling issue, the number of ticks returned is decremented * by 1 so that a handler can be called and update to the current value. * This allows scheduling restart successfully after the OS is resumed. * * @return the number of elapsed ticks minus 1 */ uint32_t resume(); /** * Schedule an os tick to fire * * @param delta Tick to fire at relative to current tick * * @warning If a tick is already scheduled it needs to be cancelled first! */ void schedule_tick(uint32_t delta = 1); /** * Prevent any scheduled ticks from triggering */ void cancel_tick(); /** Get the current tick count * * @return The number of ticks since timer creation. For the os_timer this * should match RTX's tick count (the number of ticks since boot). */ uint32_t get_tick(); /** * Get the time * * @return Current time in microseconds */ us_timestamp_t get_time(); protected: virtual void handler(); void _increment_tick(); static void _set_irq_pending(); us_timestamp_t _start_time; uint64_t _tick; bool _suspend_time_passed; bool _suspended; }; /** * @} * @} * @endcond */ } } #endif #endif