I have a CM3 inside an industrial gateway (Kunbus Revolution Pi), I have set the OTP bit "program_usb_boot_mode" and the RPIboot program in Windows doesn't work (stays in "Waiting for BCM2835/6/7").
The boot used to work before the OTP bit and now I can´t read/write the image to the CM3.
I hace seen in a forum that this is caused because the CM3 boots to Host mode all the time and not in Boot mode, so the only way to handle this was to remove SD or disable eMMC. I already disabled the eMMC successfully but still can't enter Boot mode.
I want to restore the CM3 to a backup image that I have because I filled all the storage but I can't manage to do that.
Any advice would be helpful.