[New Variant] WeAct STM32H503 Core Board

[Avamander]

Board description (please complete the following information):

• Name: WeAct STM32H503 Core Board
• Link to all relevant information: https://github.com/WeActStudio/WeActStudio.STM32H503CoreBoard/tree/master
• Schematic: https://github.com/WeActStudio/WeActStudio.STM32H503CoreBoard/blob/master/Hardware/WeAct-STM32H503Cx_CoreBoard_V10%20SchDoc.pdf
• In terms of additional hardware, LED_BUILTIN is PC13, USER_BUTTON is PA0

It also seems like my physical board has a STM32H503CBT6 but the schematic has a STM32H503CBU6, unsure how much of a difference it makes though.

Note that user can add a STM32 based board following this wiki

Any contribution is welcome, so do not hesitate to submit a PR.

All new variant request will be moved to [New Variant] request list #722 and the related issue will be closed.

[Avamander]

For some reason I also can't get USB CDC serial working with the following configuration "Generic STM32H503CBTx", "CDC (Generic Serial)", "U(S)ART (Generic Serial)". The device fails to respond (to URB_FUNCTION_GET_DESCRIPTOR_FROM_DEVICE) and the result is "This device cannot start. (Code 10)" under Windows 11. At the same time DFU works and enumerates properly on the same board.

[fpistm]

You should check the clock configuration to ensure USB clock is 48 MHz.

[Avamander]

Reading this, it should be: https://github.com/stm32duino/Arduino_Core_STM32/blob/main/variants/STM32H5xx/H503CB(T-U)/generic_clock.c

It also doesn't seem like USB communication is failing completely, if I fiddle with the clocks then it fails sooner and the error is also about failing to enumerate (not just "This device cannot start.").

I found this thread on ST's forums, but it's unclear if it affects the STM32H503x: https://community.st.com/t5/stm32cubemx-mcus/missing-hal-pwrex-enablevddusb-when-generating-peripheral/m-p/719700

A few other people have also had difficulties with H5's USB: hathach/tinyusb#2203

[fpistm]

USB is know to work on Nucleo H503RB with generic or dedicated target. I do not have this hardware so can't help on this.

Moved to [New Variant] request list #722.