Ameba Arduino: [RTL8722CSM] [RTL8722DM] Power Save Deep Sleep Mode

Materials
  • RTL8722DM x 1

Example

Introduction
Ameba-D supports two low power modes which are deepsleep mode and sleep mode. Deepsleep mode turns off more power domain than sleep mode. The power consumptions of DeepSleep Mode is around 7uA to 8uA compare to normal state around 22mA. This example describes how to enter deepsleep mode and configure wakeup source.

Procedure
Open “File” -> “Examples” -> “AmebaPowerSave” -> “DeepSleepMode”

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Set condition values as picture below.
“DS_WAKEUP_SOURCE” is used to set the wake-up source, user can chose 3 wake up sources now,
AON timer (SET_DS_AON_TIMER_WAKEUP);
AON pins (SET_DS_AON_WAKEPIN_WAKEUP);
RTC timer (SET_DS_RTC_WAKEUP);

AON timer can be set from 0 to 32760000 range (unit ms) by AON_TIMER_SLEEP_DURATION

There are 4 pins can be set as AON pins and active high for wake-up, D16, D17, D26 and D27. The AON pin can be set by SET_DS_AON_WAKEPIN_WAKEUPPIN

RTC timer wake-up system by set alarm. The alarm has 4 values, day, hour, min and sec. All 4 values can be set by DS_RTC_ALARM_DAY, DS_RTC_ALARM_HOUR, DS_RTC_ALARM_MIN, and DS_RTC_ALARM_SEC

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When finished the condition values setting, system will run and switch between normal and deepsleep mode controlled by wakeup source. Serial Monitor displays the switching log.

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Code Reference

Please refer to the API Documents PowerSave section for detail description of all API.
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