esp-idf/components/esp32/pm_impl.h
2017-10-18 14:19:16 +08:00

118 lines
3.6 KiB
C

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