Arduino for STM32

PB5 has a timer:
https://github.com/stm32duino/Arduino_Core_STM32/blob/9154e6e0d3b9cbe8692692380517616fda6c5320/variants/STM32L0xx/L051T(6-8)Y/PeripheralPins.c#L89
But PB14 and PB2 do not have one.
So doing analogWrite(PB2, 255) is the same than doing digitalWrite(PB2, HIGH).
Try digitalWrite(PB5 ...

Remove the 3.3v from the swd connector and power the bord with usb.

Boot 0 an 1 have to be 0.

If you change in the sketch it is not in the scope of the Serial header to redefine it. Sketch is a cpp file.
Use the build_opt.h way as described here:
https://github.com/stm32duino/Arduino_C ... le-content

Duplicate here by the OP:
https://github.com/orgs/stm32duino/discussions/2690

It is not linked to the core but to Arduino IDE on windows.
On Linux or mac first build take less than a minutes.

STM32 core release 2.10.1

* Bug fix of 2.10.0: openocd version
* Enable U0 debug.

Release Note here:
https://github.com/stm32duino/Arduino_C ... tag/2.10.1

I've found an issue in the 2.10.0 linked to openocd. Unfortunately the version referenced in the platform.txt is not correct.
https://github.com/stm32duino/Arduino_C ... ssues/2683
I will release a 2.10.1 today to fix this.
I've tested the debug and it works as expected.

SysTick->VAL isn't incremented when irq disabled IIWR

DWT_CYCCNT is always incremented even if irq are disabled.

Ok. So probably linked to the new openocd version.