STM32CubeIDE 1.19 generates incorrect startup.s file for STM32H7 dual core MCUs

mordent · ‎2025-12-16

Hi,

If I use STM32CubeIDE 1.19 to start a new project for the STM32H755 Nucleo board, the startup assembly files in both the CM7 and CM4 sub-projects are the same file with the same contents, startup_stm32h755zitx.s. It looks like this file is the one generated for the M7 core that just gets copied over to the M4 directory, because inside it has: .cpu cortex-m7

Now, I know both cores share all the peripherals and interrupts. But I would assume the ".cpu" definition would need to be cortex-m4 for the M4 core. So far I haven't seen any issue, but this is probably a hidden bug.

Thanks,

-m

Souhaib MAZHOUD · ‎2025-12-19

Hello @mordent

Thank you for bringing this up!

I will check this internally with the dedicated team and get back to you ASAP.

KR, Souhaib

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