Which variant of STM32 on PlatformIO with UP Xtreme

mrubio

Hi,

I'm trying to use the HardwareTimer Library by stm32duino on the integrated STM32 of the UpBoard Xtreme i7, to generate a PWM signal. Unfortunately the proposed board variant to use in PlatformIO is a bluepill board (https://github.com/up-board/up-communit ... Xtreme_MCU) which does not seem to be correct, as they have different external oscillator frequencies and therefore the HardwareTimer Library outputs a PWM signal with a wrong frequency e.g. duty cycle. To fix this I would have to define a new board variant according to this discussion here (https://www.stm32duino.com/viewtopic.php?f=7&t=1515&p=9724#p9724) . I was wondering if something like this already exists and if someone had the same issue before? Or if somebody more experienced could explain to me how to exactly define a new board variant.

Thanks in advance!

Matthias

DCleri

Hello @mrubio

Sorry for the problem you have encountered.

There was a mistake in the documentation (where early version of the board used a 12MHz oscillator), but we have now updated the tutorial to use the right settings: https://github.com/up-board/up-community/wiki/Pinout_Xtreme_MCU#platformio-projects

You won't need a variant as it is the same as a Bluepill

Please let me know if it works for you.