A secure bootloader for Specter-DIY. sha256.signed.txt contains hashes of the binaries signed with Stepan's gpg key available from https://stepansnigirev.com/ss-specter-release.asc.
To flash the board for the first time copy initial_bootloader_v1.0.0.bin via STLINK (when the board is connected via miniUSB) to the mounted DIS_F469NI volume.
To upgrade from previous versions (for example from no_rdp to protected one) put specter_upgrade_bootloader_v1.0.0.bin to the SD card and insert it to the discovery board. You will be asked to reboot the device twice in the process.
Content of the release:
initial_bootloader_no_rdp.bin- bootloader without read & write protection, good for testing.initial_bootloader_v1.0.0.bin- bootloader with protections enabledspecter_upgrade_bootloader_v1.0.0.bin- upgrade file containing bootloader v1.0.0