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How do you put STM32 in sleep mode?
Entry. In order to enter the SLEEP MODE, we must disable the systick interrupt first, or else this interrupt will wake the MCU every time the interrupt gets triggered. HAL_SuspendTick(); Next, we will enter the sleep mode by executing the WFI (Wait For Interrupt), or WFE (Wait For Event) instructions.
How much power does STM32 use?
12.7 mA
According to datasheet, STM32 consumes 12.7 mA of current during ideal conditions in run mode. In my program code, I disabled all peripherals, made all GPIO’s analog to reduce any leakage, and save as much power as I can.
What is low power Sleep mode?
Low-power sleep mode is essentially a combination of Low-power run mode and Sleep mode. Not only is the Cortex-M0+ core stopped, but the regulator is placed into low power mode, which means the same conditions as those from Low-power run mode must be met.
What is low power mode in STM32?
Low Power Run : CPU switch to 131KHz clock to save power. Current is down to 6,5uA. Sleep Mode : CPU is stopped, Memory & Register are retained, some peripheral stays active. Sleep Mode : CPU is stopped but it can be wake-up by any of the active peripherals.
How do I put Arduino in sleep mode?
Load your sketch and wait 5 seconds for the LED to turn off and the Arduino to go to sleep. After the LED turns off insert the other end of the jumper wire in a GND pin on your Arduino Uno. This will pull pin 2 LOW triggering the interrupt, thus awaking the sleeping Arduino.
What’s the objective of STM32 low power mode?
STM32 – Low Power – Stop Mode The objective is to create a Stop Mode switch with automatic wake-up after 500ms, on Serial event and on external GPIO event (external interrupt).
What are the different modes of low power?
Different Low Power mode are described in the STM32L Datasheet: Low Power Run : CPU switch to 131KHz clock to save power. Current is down to 6,5uA Sleep Mode : CPU is stopped, Memory & Register are retained, some peripheral stays active. Sleep Mode : CPU is stopped but it can be wake-up by any of the active peripherals.
What’s the difference between low power and sleep mode?
Different Low Power mode are described in the STM32L Datasheet: Low Power Run : CPU switch to 131KHz clock to save power. Sleep Mode : CPU is stopped, Memory & Register are retained, some peripheral stays active. Sleep Mode : CPU is stopped but it can be wake-up by any of the active peripherals.
How to put the MCU in low power mode?
The first function place the MCU in low power mode when the second one restore the normal functions. Between the two, the MCU is in low power mode. You can add your custom workload before of after these 2 lines. The function stm32l_lowPowerResume allow to resume from Stop mode: