I burned bootloader on my pixhawk 4 through FMU debug and IO debug ports with using st-link v2 (SWD). px4fmuv5_bl.bin and px4io_bl.bin files was maked as recommended in Ubuntu 16.04. But the device does not runign. The system and NSH does not booting . Please help, could anyone give a link to the binary files px4fmuv5_bl.bin and px4io_bl.bi. So that I can exclude the wrong compilation option.