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118 lines
3.6 KiB
C
118 lines
3.6 KiB
C
// Copyright 2016-2017 Espressif Systems (Shanghai) PTE LTD
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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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#pragma once
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/**
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* @file pm_impl.h
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*
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* This header file defines interface between PM lock functions (pm_locks.c)
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* and the chip-specific power management (DFS/light sleep) implementation.
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*/
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#include "soc/rtc.h"
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#include "esp_pm.h"
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#include "esp_timer.h"
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#include "sdkconfig.h"
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/**
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* This is an enum of possible power modes supported by the implementation
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*/
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typedef enum {
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PM_MODE_LIGHT_SLEEP,//!< Light sleep
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PM_MODE_APB_MIN, //!< Idle (no CPU frequency or APB frequency locks)
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PM_MODE_APB_MAX, //!< Maximum APB frequency mode
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PM_MODE_CPU_MAX, //!< Maximum CPU frequency mode
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PM_MODE_COUNT //!< Number of items
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} pm_mode_t;
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/**
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* @brief Get the mode corresponding to a certain lock
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* @param type lock type
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* @param arg argument value for this lock (passed to esp_pm_lock_create)
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* @return lowest power consumption mode which meets the constraints of the lock
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*/
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pm_mode_t esp_pm_impl_get_mode(esp_pm_lock_type_t type, int arg);
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/**
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* If profiling is enabled, this data type will be used to store microsecond
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* timestamps.
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*/
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typedef int64_t pm_time_t;
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/**
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* See \ref esp_pm_impl_switch_mode
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*/
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typedef enum {
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MODE_LOCK,
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MODE_UNLOCK
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} pm_mode_switch_t;
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/**
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* @brief Switch between power modes when lock is taken or released
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* @param mode pm_mode_t corresponding to the lock being taken or released,
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* as returned by \ref esp_pm_impl_get_mode
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* @param lock_or_unlock
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* - MODE_LOCK: lock was taken. Implementation needs to make sure
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* that the constraints of the lock are met by switching to the
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* given 'mode' or any of the higher power ones.
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* - MODE_UNLOCK: lock was released. If all the locks for given
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* mode are released, and no locks for higher power modes are
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* taken, implementation can switch to one of lower power modes.
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* @param now timestamp when the lock was taken or released. Passed as
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* a minor optimization, so that the implementation does not need to
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* call pm_get_time again.
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*/
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void esp_pm_impl_switch_mode(pm_mode_t mode, pm_mode_switch_t lock_or_unlock, pm_time_t now);
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/**
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* @brief Call once at startup to initialize pm implementation
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*/
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void esp_pm_impl_init();
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/**
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* @brief Hook function for the idle task
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* Must be called from the IDLE task on each CPU before entering waiti state.
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*/
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void esp_pm_impl_idle_hook();
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/**
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* @brief Hook function for the interrupt dispatcher
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* Must be called soon after entering the ISR
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*/
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void esp_pm_impl_isr_hook();
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/**
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* @brief Dump the information about time spent in each of the pm modes.
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*
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* Prints three columns:
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* mode name, total time in mode (in microseconds), percentage of time in mode
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*
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* @param out stream to dump the information to
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*/
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void esp_pm_impl_dump_stats(FILE* out);
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#ifdef CONFIG_PM_PROFILING
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#define WITH_PROFILING
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#endif
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#ifdef WITH_PROFILING
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static inline pm_time_t IRAM_ATTR pm_get_time()
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{
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return esp_timer_get_time();
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}
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#endif // WITH_PROFILING
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