I am trying to use platformio with some old Nucleo F401RE boards I have laying around. Compilation and download to device look ok. However there doesn’t seem to be any execution. When debugging I notice that the initialization sequence fails in SystemClock_Config. See debugging output. [Screenshot…

[image] vortex314: Looks these boards were manufactured with the idea that an X3 crystal would be present. Yep, while the Arduino core assumes that (apparently on my newer Nucleo base board revision), the SB16 and SB50 are closed so that the 8MHz gets through to the chip and it can then do HS…

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Nucleo F401RE fails to execute Clock init issue

PlatformIO Core

maxgerhardt December 30, 2020, 1:42pm 2

What’s your platformio.ini?

Possibly related report on another F4 board: Target Halted Due to debug-request - #8 by fek9