CONFIG_ARM=y CONFIG_STM32=y CONFIG_STM32F7=y CONFIG_TARGET_STM32F746_DISCO=y CONFIG_SYS_PROMPT="U-Boot > " CONFIG_AUTOBOOT_KEYED=y CONFIG_AUTOBOOT_PROMPT="Hit SPACE in %d seconds to stop autoboot.\n" CONFIG_AUTOBOOT_STOP_STR=" " # CONFIG_CMD_SETEXPR is not set