I'm sorry for the delay @robert-hh, but I haven't forgotten about those (3x H7 WeAct Studio) boards - I intend to revisit them after PyCon, this weekend.

@mattytrentini Don't worry, don't hurry.

THere is a PR by Matt for this board. I tried the board files and they work. #12540

Hi Robert,

Thank you for pointing me to the PR (#12540). Unfortunately, I'm having issues with compiling the firmware for the WEACT_STM32H743 board. Here's a summary of the problems I've encountered:

Conflicting definitions:

I ran into redefinition errors for HSE_VALUE, LSE_VALUE, and EXTERNAL_CLOCK_VALUE. These appear to be defined both in the stm32h7xx_hal_conf.h file (specific to the board) and in the stm32h7xx_ll_rcc.h file from the HAL library.
This leads to compilation failure with the -Werror flag, treating these warnings as errors.
Submodule synchronization:

I ensured all submodules were up to date using git submodule update --init --recursive, but the issue persists.
Tried both commit versions:

I attempted to compile with both the commits in the PR: the one marked with a green check and the one with a red cross. Both resulted in similar errors.
Despite these efforts, I couldn't get the build to complete successfully. If you have any suggestions or insights based on your successful experience with these files, I'd greatly appreciate it!

Thank you in advance for your time and assistance!

I have built a firmware for a STM32H743 board with a STM32H743VIT6 chip. Attached are the .dfu and .hex files. It works and shows 8MB of flash and about 430kB head space. You can upload it to the board using dfu-util. Set the board to dfu-mode by pushing first the B0 button, then NR and then release both button. Call dfu.util -l to check, if DFU capable devices are present, and call dfu-util --help for usage. The option for loading firmware to the device is -D. The command accroding to the Makefile is:
dfu-util -a 0 -d vid:pid -D firmware.dfu -s :leave
Loading is slow, at least on my set-up.

stm32H743_firmware.zip

Edit: These are my board definition files:

WEACT_STM32H743.zip

WEACT_H562RG.zip uploaded the board definition I'm using, there's some changes I've made to support my needs but you can change the settings you want on mpconfigboard.h

Hello friends,

First of all, I want to sincerely thank everyone who has replied to me earlier — your help is truly appreciated.

I'm still quite new to hardware configuration, and I must admit it's really difficult for me to get things right on the first try. I apologize if my questions seem too simple or naive.

I'm working with the WeAct Studio STM32H562RGT6 board. Thanks to @AndreoBotelho, I already have a basic MicroPython board configuration that compiles successfully. However, it currently only enables two UARTs, while I critically need at least 5 UARTs for my project (ideally, all 6 supported by the MCU).

Here is what I need working for my project:

At least 5 UARTs (ideally 6),

One SPI interface (used for other peripherals — not for SD card),

SD card support (either via SPI or SDMMC),

USB support, preferably with REPL.

Everything else (I2C, ADC, PWM, etc.) is not needed and can be disabled.

Could someone kindly guide me on how to configure the board to enable these interfaces? I assume I need to edit pins.csv, mpconfigboard.h, mpconfigboard.mk, or similar files — but I'm not sure where to start or how to properly define everything.

I would be extremely grateful for any advice, examples, or working configurations!