PowerMode - Deep Sleep Mode

Introduction

In this example, the develoPM_deepsleepent board will demo the Deep Sleep Mode for power save. There are 3 wake-up sources. The system will count down 5s then go to power mode Deep Sleep. After the wake-up source being processed, the system will reboot.

Procedure

Open face detection example in “File” -> “Examples” -> “AmebaPowerMode” -> “DeepSleePM_deepsleepode”.

Next is setting up the system and entering the power mode. Please refer to the following steps for entering Deep Sleep mode.
Step 1. Set up the “WAKEUP_SOURCE”, AON timer: 0; AON GPIO: 1; RTC: 2.
Step 2. Set up the wake-up source setting. There are 3 wake-up sources, each one has its own settings.
For AON timer, at section ”#if (WAKEUP_SOURCE == 0)”, set value to “CLOCK” and “SLEEP_DURATION”. “CLOCK” can be 4MHz or 100kHz. “SLEEP_DURATION” unit is in seconds.
For AON GPIO, at section “#elif (WAKEUP_SOURCE == 1)”, set value to “WAKUPE_SETTING”. “WAKUPE_SETTING” in this case is the Pin number, that can be 21 or 22. The GPIO pin is set to active high, please refer to the following connection.

For RTC, at section “#elif (WAKEUP_SOURCE == 2)”, set value to “ALARM_DAY”, “ALARM_HOUR”, “ALARM_MIN”, or “ALARM_SEC”. All alarm values set the duration of RTC wake-up. The range is “1day, 0h, 0m, 0s” to “365day, 23h, 59min, 59s”.
Step 3. Start the Deep Sleep mode. There is only 1 optional setting for this step. When the wake-up source is set to RTC, use “PowerMode.start(1970, 1, 1, 0, 0, 0);” to replace “PowerMode.start();” for setting the start time. (Default is 1970.1.1 00:00:00).

To wake up, all timers will automatically wake up when the duration is finished, all GPIO pins must active high by pressing the push button.
The correct boot, enter deep sleep, and reboot cycle will be same as following picture.