I've got a working instance of MicroPython on a board STM32H755 Nucleo-144 (CORE_CM7). The base for this were NUCLEO_H743ZI(2) board configs. It's not tested thoroughly, only user leds (LED1/2/3) and Ethernet (got ip address from router). There are some problems (may be not a problems just only a drawbacks). First of all, i'm tuning/checking pins.csv (from stm32h743) and stm32h755_af.csv (derived from stm32h743_af.csv) to correspond the board. I compare the same files, which provided with STM CubeMX. There is firmware for CORE_CM4 also, but it requires modified stm32h755.ld (not implemented yet). First question: may i ask request? Second one: i found dubbed pin definitions into pins.csv (from stm32h743), is it a real problem or not? Thanks.