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shivss
Associate III
Jul 29, 2025 3:37 PM UTC
Question

stm32u585 sleep

hi,

 am using stm32u585iot dev board i need all power code stop and shutdown and standby code for that board?

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7 replies

Andrew Neil
Andrew Neil
Super User
Jul 29, 2025 3:48 PM UTC

You mean the B-U585I-IOT02A ?

https://www.st.com/en/evaluation-tools/b-u585i-iot02a.html

 

If so, have you looked under 'Tools & Software':

https://www.st.com/en/evaluation-tools/b-u585i-iot02a.html#tools-software 

 

Also look at the STM32CubeU5 pack:

https://www.st.com/en/embedded-software/stm32cubeu5.html

whence AN5701 Introduction to STM32Cube MCU Package examples for STM32U5 MCUs:

https://www.st.com/resource/en/application_note/an5701-introduction-to-stm32cube-mcu-package-examples-for-stm32u5-mcus-stmicroelectronics.pdf

 

A complex system that works is invariably found to have evolved from a simple system that worked.A complex system designed from scratch never works and cannot be patched up to make it work.
Imen.D
ST Technical Moderator
Jul 29, 2025 4:29 PM UTC

 

Hello @shivss 

I recommend you this article explains low-power modes, and provides code examples: Getting started with PWR - stm32mcu

Refer also to the PWR examples within B-U585I-IOT02A board:

STM32CubeU5/Projects/B-U585I-IOT02A/Examples/PWR at main · STMicroelectronics/STM32CubeU5 · GitHub

In order to give better visibility on the answered topics, please click on 'Best answer' on the reply which solved your issue or answered your question. Thanks
    shivssAuthor
    Associate III
    Jul 30, 2025 3:01 PM UTC

    Hi @Imen.D @Andrew Neil 

     

    yes B-U585I-IOT02A  this board only .

    The examples in GitHub is for switch but I need with RTC timer wakeup

    Saket_Om
    ST Technical Moderator
    Jul 31, 2025 8:58 AM UTC

    Hello @shivss 

    Did you check this example below: 

    STM32CubeL4/Projects/NUCLEO-L452RE/Examples/RTC/RTC_LowPower_STANDBY at master · STMicroelectronics/STM32CubeL4 · GitHub

    In order to give better visibility on the answered topics, please click on 'Best answer' on the reply which solved your issue or answered your question. Saket_Om
    shivssAuthor
    Associate III
    Jul 31, 2025 4:36 PM UTC

    Hi ,

     its an RTC alarm not RTC Timer wakeup ?  like this?

    (HAL_RTCEx_SetWakeUpTimer_IT(&hrtc, 0, RTC_WAKEUPCLOCK_RTCCLK_DIV16, 0)

     

    Saket_Om
    ST Technical Moderator
    Aug 1, 2025 10:55 AM UTC

    Hello @shivss 

    Are you using the LSE as RTC clock source ? 

    According to the reference manual the RTC remain active only when the RTC clock source is LSE.

    Saket_Om_1-1754045697204.png

     

     

    In order to give better visibility on the answered topics, please click on 'Best answer' on the reply which solved your issue or answered your question. Saket_Om
    shivssAuthor
    Associate III
    Aug 4, 2025 8:40 AM UTC

    Hi,

     yes am using LSE 

    shivss_0-1754296803961.png

     

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