Arduino for STM32

That is normal. The handler is already defined for the serial. You have to comment it in the core if you want use Serial. Else you can define the HAL_UART_MODULE_ONLY but Serial instance will be disabled.

https://github.com/stm32duino/Arduino_C ... odule-only

And avoid print in ISR.

No it is not yet released, will come in the coming weeks.
Anyway you can use the GitHub repository: https://github.com/stm32duino/Arduino_C ... repository

Post have hidden links. That's why I deleted the user and the post.

If you select the generic target, the default Serial pins are not PA9/PA10 but PA2/PA3:
https://github.com/stm32duino/Arduino_Core_STM32/blob/5a40f2d257379c4a6e1184b564c4f7d4fc43e7c6/variants/STM32F1xx/F103C8T_F103CB(T-U)/variant_generic.h#L140-L145

You can change it at sketch level using the setRx ...

FIXED IT!!!
Ok managed to get building and working on my IDE, the main issue is step 5 of the make a varient...
/* Memories definition */
MEMORY
{
- RAM (xrw) : ORIGIN = 0x20000000, LENGTH = 144K
- FLASH (rx) : ORIGIN = 0x8000000, LENGTH = 512K
+ RAM (xrw) : ORIGIN = 0x20000000, LENGTH = LD ...

If you used the generic and not a dedicated variant then you can use the build_opt.h or the hal_conf_extra.h

https://github.com/stm32duino/Arduino_Core_STM32/wiki/Customize-build-options-using-build_opt.h
https://github.com/stm32duino/Arduino_Core_STM32/wiki/HAL-configuration#customize-hal-or ...

Simply redefine it in your variant*.h file
Example for NUCLEO_F722ZE:
https://github.com/stm32duino/Arduino_C ... 2ZE.h#L224

Hi again new issue so new thread. we have USART3 on PC10/PC11 for debug output. But for some reason its outputting garbage.

I created a hello world in cubeIDE and it works fine there.
I am using the same clock config as cubeIDE so I know its not some strange clock sync issue.


Is it using HSE ...

Great. Could you share your code?
Here an example how to convert a cube example:
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