I use HAB successfully authenticates the signed image .HAB didn't generate any events.I use fuse prog 1 3 0x2000000 this commond to close the devices.I can load u-boot images that have been signed.But when I load u-boot images that don't have been signed.The devices cann't power on . I can't get any message from the USB port and Serial port.They can't work.What should I do to save my devices.And what's the reason that my devices can't power on.
Hi,
This is normal - once you have closed the device, the secure boot feature will not let anymore the execution passing to u-boot if the signature checking will fail. So, you'll be able to run only u-boot/images signed with the proper keys in sync with the SRK hashes.
Regards,
Marius