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/**
* Header file for Sensor Watch application
*
* You should be able to write a watch app by simply implementing these functions
* and declaring callbacks for various GPIO and peripheral interrupts. The main.c
* file takes care of calling these functions for you. The general flow:
*
* 1. Your app_init() function is called.
* - This method should only be used to set your initial application state.
* 2. If your app is waking from BACKUP, app_wake_from_deep_sleep() is called.
* - If you saved state in the RTC's backup registers, you can restore it here.
* 3. Your app_setup() method is called.
* - You may wish to enable some functionality and peripherals here.
* - You should definitely set up some interrupts here.
* 4. The main run loop begins: your app_loop() function is called.
* - Run code and update your UI here.
* - Return true if your app is prepared to enter STANDBY mode.
* 5. This step differs depending on the value returned by app_loop:
* - If you returned false, execution resumes at (4).
* - If you returned true, app_prepare_for_sleep() is called; execution moves on to (6).
* 6. The microcontroller enters the STANDBY sleep mode.
* - No user code will run, and the watch will enter a low power mode.
* - The watch will remain in this state until an interrupt wakes it.
* 7. Once woken from STANDBY, your app_wake_from_sleep() function is called.
* - After this, execution resumes at (4).
*/
void app_init();
void app_wake_from_deep_sleep();
void app_setup();
bool app_loop();
void app_prepare_for_sleep();
void app_wake_from_sleep();
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