138 lines
4.1 KiB
C
138 lines
4.1 KiB
C
// Copyright 2015-2016 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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// 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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#ifndef __ESP_DEEPSLEEP_H__
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#define __ESP_DEEPSLEEP_H_
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#include <stdint.h>
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#ifdef __cplusplus
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extern "C" {
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#endif
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/** \defgroup Deep_Sleep_API Deep Sleep API
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* @brief API for putting device into deep sleep
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*/
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/** @addtogroup Deep_Sleep_API
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* @{
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*/
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/**
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* @brief Set the chip to deep-sleep mode.
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*
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* The device will automatically wake up after the deep-sleep time set
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* by the users. Upon waking up, the device boots up from user_init.
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*
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* @attention The parameter time_in_us to be "uint64" is for further development.
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* Only the low 32 bits of parameter time_in_us are avalable now.
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*
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* @param uint64 time_in_us : deep-sleep time, only the low 32bits are avalable now. unit: microsecond
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*
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* @return null
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*/
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void system_deep_sleep(uint64_t time_in_us);
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/**
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* @brief Default stub to run on wake from deep sleep.
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*
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* Allows for executing code immediately on wake from sleep, before
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* the software bootloader or esp-idf app has started up.
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*
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* This function is weak-linked, so you can implement your own version
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* to run code immediately when the chip wakes from
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* sleep.
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*
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* For example:
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* @code
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* void RTC_IRAM_ATTR esp_wake_deep_sleep(void) {
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* esp_default_wake_deep_sleep();
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* // Add additional functionality here
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* }
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*
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* (Implementing this function is not required for normal operation,
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* in the usual case your app will start normally when waking from
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* deep sleep.)
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*
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* esp_wake_deep_sleep() functionality is limited:
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*
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* - Runs immediately on wake, so most of the SoC is freshly reset -
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* flash is unmapped and hardware is otherwise uninitialised.
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*
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* - Can only call functions implemented in ROM, or marked RTC_IRAM_ATTR.
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*
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* - Static variables marked RTC_DATA_ATTR will have initial values on
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* cold boot, and maintain these values between sleep/wake cycles.
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*
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* - Read-only data should be marked RTC_RODATA_ATTR. Strings must be
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* declared as variables also using RTC_RODATA_ATTR, like this:
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* RTC_RODATA_ATTR const char message[] = "Hello from very early boot!\n";
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*
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* - Any other static memory will not be initialised (either to zero,
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* or to any predefined value).
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*
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*
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* - If you implement your own stub, the first call the stub makes
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should be to esp_default_wake_deep_sleep().
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*/
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void esp_wake_deep_sleep(void);
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/**
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* @brief Function type for stub to run on wake from sleep.
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*
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*/
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typedef void (*esp_deep_sleep_wake_stub_fn_t)(void);
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/**
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* @brief Install a new stub at runtime to run on wake from deep sleep
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*
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* If implementing esp_wake_deep_sleep() then it is not necessary to
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* call this function.
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*
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* However, it is possible to call this function to substitute a
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* different deep sleep stub. Any function used as a deep sleep stub
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* must be marked RTC_IRAM_ATTR, and must obey the same rules given
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* for esp_wake_deep_sleep().
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*/
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void esp_set_deep_sleep_wake_stub(esp_deep_sleep_wake_stub_fn_t new_stub);
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/**
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* @brief Return current wake from deep sleep stub, or NULL if
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* no stub is installed.
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*/
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esp_deep_sleep_wake_stub_fn_t esp_get_deep_sleep_wake_stub(void);
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/* The default esp-idf-provided esp_wake_deep_sleep() stub.
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If you replace esp_wake_deep_sleep() in your program, or use
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esp_set_deep_sleep_wake_stub(), then it is recommended you call
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esp_default_wake_deep_sleep() as the first function in your stub.
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*/
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void esp_default_wake_deep_sleep(void);
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/**
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* @}
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*/
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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 /* __ESP_SYSTEM_H__ */
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