Arduino for STM32

I'm using HardwareTimer to basically do a SPI-like communication, and need it to be at least 1MHz in speed.
MCU is STM32F446, 180MHz.
I've set up a PWM timer with 50% duty cycle, in one half I do SCK down and MOSI setup, in the other SCK up.
The timer operates in bursts of 2*64 bit bursts, with chip ...

So through mindlessly probing the board I've find out that the driver headers are not directly connected to the MCU, but via a HCT125 Bus Buffer Gates, this explains why I wasn't able to toggle some header pins directly, the buffer outputs need to be toggled first. These chips are not mentioned once ...

Without the correct schematics it is hard to help. The one provided is for F446. You can try to compare both and write an equivalence table.


Yeah, without the correct schematic...
Can you advise on how to find out where the pins are actually going to? Can I just probe them all from the MCU pins ...

my apologies, i'm off tracked.
out of curiosity i took a look at the schematics
https://github.com/bigtreetech/BIGTREETECH-OCTOPUS-V1.0/blob/master/Hardware/BIGTREETECH%20Octopus.pdf

it is using the stm32f446zet6


Sry I didn't mention it clearly in my first post. I'm running the STM32F429ZGT6 ...

there is another thing, firmwares like Marlin isn't quite the same as 'vanilla' stm32duino.
they may use their codes and drivers that is independent of stm32duino.


what do you mean with 'may use their codes and drivers'? I'm not using anything from the Marlin codebase, even the variant.h files ...

I am using a multimeter to check what the pin is doing. Even when using the Pxxx symbols, which are supposed to be the PF15, PG0, PG1 and PD11, only the PD11 does something, the others stay the same all the time

Hi,

so I have this board, the Bigtreetech Octopus Pro v1.0.1., and I want to use it for a little different purpose than what it was made for.
I've already went through a little journey to get any code running on the board... I currently use Arduino IDE with the STM32duino library, board Generic ...