* Addition: Shutdown time setting
* Add a function to change the time setting register
* Add maximum time (64s) setting at initialization
(If you prefer short time settings, set them yourself after initialization)
* Add : powerOFF function
* Fix : Adjusted function name
*setLowCurrentShutdownTime -> setLowPowerShutdownTime
*SleepTime -> ShutdownTime
*SLEEP_xxS -> SHUTDOWN_xxS
Add : powerOFF function
* fix:Detailed setting of wakeup factor
If you set the wakeup time, it will be reflected incorrectly even when it is not needed.
* modify : Exclude functions that don't work properly
*setLowPowerShutdown() -> Add attribute
*setKeepLightLoad() -> Add attribute
* add : add Link
*Add a reference to the official document
* Modify sleep.ino comment
・Correct the mistake of judgment condition that occurred at refactoring
->Improve the situation that I2C communication function does not return the correct result
* clean : integrate I2C communication functions.
*I2C integrate (power.cpp + MPU9250.cpp) -> move to CommUtil.cpp (Cadd CommUtil class.)
*add debug flag for I2C communication (if use, defined I2C_DEBUG_TO_SERIAL in CommUtil.cpp)
*cleanup some comment and cords.(power.h)
Add :get a input key for M5Stack Faces
*add M5Faces.cpp and M5Faces class.
* Correction of rewriting mistakes
* Fix : refactoring code.
Modified to follow Arduino style guide as much as possible
*indent : 2spaces /tab
*format : UTF-8
*return : LF
* clean : integrate code format
* clean : integrate code format
*miss indent
* fix : replace to slash from '\' ( for multi-environment)
* fix:
*MPU9250.cpp : Correct the error of comment mark
*Sprite.cpp : Fixed the problem that the number of parentheses does not match due to the pre-processing condition
* fix : Refactoring mistake: number of parentheses did not match
* clean : integrate I2C communication functions.
*I2C integrate (power.cpp + MPU9250.cpp) -> move to CommUtil.cpp (Cadd CommUtil class.)
*add debug flag for I2C communication (if use, defined I2C_DEBUG_TO_SERIAL in CommUtil.cpp)
*cleanup some comment and cords.(power.h)
Add :get a input key for M5Stack Faces
*add M5Faces.cpp and M5Faces class.
* Correction of rewriting mistakes