Hello everyone. I wanted to know how can I put the stm32f4xx in sleep mode and wake it with internal interrupt. i want it to go in sleep mode for 2ms and be awake for 2ms.

[Fghas.1]

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[waclawek.jan]

Read the "Low power modes" subchapter of PWR chapter in RM.

You can simply use the __WFI(); intrinsic go to to sleep, any interrupt will wake up.

JW

[Fghas.1]

thank you so much, but is it possible to use timers to wake the micro?

[Nikita91]

Of course!

Any interrupt can wake up from WFI. If you configure the timer to generate an interrupt, it will wake up the MCU.

[ChahinezC]

Hello @Fghas.1​,

You can refer to the examples provides by the STM32CubeF4 package.

As an example, the project under the "STM32Cube_FW_F4_V.XX\Projects\STM32F411E-Discovery\Examples\PWR\PWR_CurrentConsumption" path can help you configure the sleep mode and use the RTC configuration to set the timer to wake up from the low power mode.

Chahinez.