STM32H753ZI (NUCLEO-H743ZI) minimal CMSIS project with FreeRTOS.
arm-none-eabi-gcc(GNU Tools for STM32)openocd(xPack OpenOCD 0.12.0+)
make # build elf, bin, hex
make flash # program target via ST-Link
make openocd # start GDB server on :3333
make gdb # connect GDB to running OpenOCD- The target requires
connect_assert_srst— the board's application disables the debug interface, so OpenOCD must hold the target in reset during initial connection. examine-endevent errors during connect are harmless (memory inaccessible while SRST is asserted, the chip resets properly after).