102 lines
3.5 KiB
C
102 lines
3.5 KiB
C
/*
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* ESPRSSIF MIT License
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*
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* Copyright (c) 2015 <ESPRESSIF SYSTEMS (SHANGHAI) PTE LTD>
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*
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* Permission is hereby granted for use on ESPRESSIF SYSTEMS ESP32 only, in which case,
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* it is free of charge, to any person obtaining a copy of this software and associated
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* documentation files (the "Software"), to deal in the Software without restriction, including
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* without limitation the rights to use, copy, modify, merge, publish, distribute, sublicense,
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* and/or sell copies of the Software, and to permit persons to whom the Software is furnished
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* to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in all copies or
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* substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
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* FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
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* COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
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* IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
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* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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*
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*/
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#ifndef __ESP_TIMER_H__
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#define __ESP_TIMER_H__
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#ifdef __cplusplus
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extern "C" {
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#endif
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#include "esp_types.h"
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/* timer related */
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typedef void os_timer_func_t(void *timer_arg);
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typedef struct _os_timer_t {
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struct _os_timer_t *timer_next;
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void *timer_handle;
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uint32_t timer_expire;
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uint32_t timer_period;
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os_timer_func_t *timer_func;
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bool timer_repeat_flag;
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void *timer_arg;
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} os_timer_t;
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/** \defgroup Timer_APIs Software timer APIs
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* @brief Software timer APIs
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*
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* Timers of the following interfaces are software timers. Functions of the timers are executed during the tasks.
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* Since a task can be stopped, or be delayed because there are other tasks with higher priorities, the following os_timer interfaces cannot guarantee the precise execution of the timers.
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* - For the same timer, os_timer_arm (or os_timer_arm_us) cannot be invoked repeatedly. os_timer_disarm should be invoked first.
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* - os_timer_setfn can only be invoked when the timer is not enabled, i.e., after os_timer_disarm or before os_timer_arm (or os_timer_arm_us).
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*
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*/
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/** @addtogroup Timer_APIs
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* @{
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*/
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/**
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* @brief Set the timer callback function.
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*
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* @attention 1. The callback function must be set in order to enable the timer.
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* @attention 2. Operating system scheduling is disabled in timer callback.
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*
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* @param os_timer_t *ptimer : Timer structure
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* @param os_timer_func_t *pfunction : timer callback function
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* @param void *parg : callback function parameter
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*
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* @return null
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*/
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void os_timer_setfn(os_timer_t *ptimer, os_timer_func_t *pfunction, void *parg);
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/**
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* @brief Enable the millisecond timer.
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*
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* @param os_timer_t *ptimer : timer structure
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* @param uint32_t milliseconds : Timing, unit: millisecond, the maximum value allowed is 0x41893
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* @param bool repeat_flag : Whether the timer will be invoked repeatedly or not
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*
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* @return null
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*/
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void os_timer_arm(os_timer_t *ptimer, uint32_t msec, bool repeat_flag);
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/**
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* @brief Disarm the timer
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*
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* @param os_timer_t *ptimer : Timer structure
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*
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* @return null
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*/
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void os_timer_disarm(os_timer_t *ptimer);
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/**
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* @}
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*/
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#ifdef __cplusplus
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}
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#endif
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#endif
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