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Zephyr project on STM32

   Zephyr Workbench, a VSCode extension to manage Zephyr on STM32.
It enables users to easily create, develop, and debug Zephyr applications.
Main features:
  • Install host dependencies.
  • Import toolchain and SDK.
  • Create, configure, build and manage apps.
  • Debug STM32.
You can directly download it from the VSCode marketplace
For more details, visit the Zephyr Workbench

System Workbench for STM32

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STM32H7 LPTIM5 not waking from stop mode

Posted by alan42 on 2023-12-21 09:35

Hi Forum,

I am using the stm32H743 and trying to keep the power consumption as low as possible by entering sleep or stop mode. I am then using a lptimer to wake the device. Eventually, I will also use the timer to determine how long the device is asleep for.

When I use LPTIM1 this all works fine and the device is woken from sleep or stop mode.

However, I have tried to move across to LPTIM5 and the device will wake from sleep mode, but will not wake from stop mode.

From what I can see in the RM all the LPTIMERS can wake the device from stop mode, but just want to check that I haven’t missed something.
Any ideas are more than welcome!
Alan

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