kopia lustrzana https://github.com/espressif/esp-idf
69 wiersze
2.3 KiB
C
69 wiersze
2.3 KiB
C
// Copyright 2017 Espressif Systems (Shanghai) PTE LTD
|
|
//
|
|
// Licensed under the Apache License, Version 2.0 (the "License");
|
|
// you may not use this file except in compliance with the License.
|
|
// You may obtain a copy of the License at
|
|
//
|
|
// http://www.apache.org/licenses/LICENSE-2.0
|
|
//
|
|
// Unless required by applicable law or agreed to in writing, software
|
|
// distributed under the License is distributed on an "AS IS" BASIS,
|
|
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
// See the License for the specific language governing permissions and
|
|
// limitations under the License.
|
|
|
|
#pragma once
|
|
|
|
/**
|
|
* @file esp_timer_impl.h
|
|
*
|
|
* @brief Interface between common and platform-specific parts of esp_timer.
|
|
*
|
|
* The functions in this header file are implemented for each supported SoC.
|
|
* High level functions defined in esp_timer.c call the functions here to
|
|
* interact with the hardware.
|
|
*/
|
|
|
|
#include <stdint.h>
|
|
#include "esp_err.h"
|
|
#include "esp_intr_alloc.h"
|
|
|
|
/**
|
|
* @brief Initialize platform specific layer of esp_timer
|
|
* @param alarm_handler function to call on timer interrupt
|
|
* @return ESP_OK, ESP_ERR_NO_MEM, or one of the errors from interrupt allocator
|
|
*/
|
|
esp_err_t esp_timer_impl_init(intr_handler_t alarm_handler);
|
|
|
|
/**
|
|
* @brief Deinitialize platform specific layer of esp_timer
|
|
*/
|
|
void esp_timer_impl_deinit();
|
|
|
|
/**
|
|
* @brief Set up the timer interrupt to fire at a particular time
|
|
*
|
|
* If the alarm time is too close in the future, implementation should set the
|
|
* alarm to the earliest time possible.
|
|
*
|
|
* @param timestamp time in microseconds when interrupt should fire (relative to
|
|
* boot time, i.e. as returned by esp_timer_impl_get_time)
|
|
*/
|
|
void esp_timer_impl_set_alarm(uint64_t timestamp);
|
|
|
|
/**
|
|
* @brief Get time, in microseconds, since esp_timer_impl_init was called
|
|
* @return timestamp in microseconds
|
|
*/
|
|
uint64_t esp_timer_impl_get_time();
|
|
|
|
/**
|
|
* @brief Get minimal timer period, in microseconds
|
|
* Periods shorter than the one returned may not be possible to achieve due to
|
|
* interrupt latency and context switch time. Short period of periodic timer may
|
|
* cause the system to spend all the time servicing the interrupt and timer
|
|
* callback, preventing other tasks from running.
|
|
* @return minimal period of periodic timer, in microseconds
|
|
*/
|
|
uint64_t esp_timer_impl_get_min_period_us();
|