arch/arm: initial STM32U3 architecture support - #19935
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Move the STM32U5 startup, interrupt, GPIO, EXTI, serial, heap, idle, and timer interrupt implementations into arch/arm/src/common/stm32. This prepares the Cortex-M33 support for reuse by compatible STM32 families. Assisted-by: OpenAI Codex:gpt-5 Signed-off-by: raiden00pl <raiden00@railab.me>
Add the initial STM32U3C5 Cortex-M33 architecture port. Assisted-by: OpenAI Codex:gpt-5 Signed-off-by: raiden00pl <raiden00@railab.me>
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August 22, 2026 07:10
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xiaoxiang781216
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Aug 22, 2026
initial support for NUCLEO-U3C5ZI-Q Assisted-by: OpenAI Codex:gpt-5 Signed-off-by: raiden00pl <raiden00@railab.me>
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Summary
#19824
Impact
new architecture
Testing
nucleo-u3c5zi boots to NSH