Hi All,
I'm having issues booting a custom IMX6UL based board using SDP with a signed image.
I have checked hab_status of the signed uboot image and uboot reported no errors. I then closed the board and booted the signed image from flash. All of this works fine and the board is successfully booting the signed image off flash, which suggests that the image is signed properly.
The issue I'm seeing is when tried to download the uboot image to the device using SDP. I initially thought that the signature of the uboot image for SDP had some issues, but I see no HAB errors when I download the signed image to an open board using SDP.
I think the imx6ul is failing to enter serial mode after being closed which isn't making much sense. My understanding was that the device would default to serial mode if it fails to authenticate the image? I'm reasonably confident that it isn't entering serial mode because I sent it the SDP command ERROR_STATUS and I'm getting no response. Sending the same command to an open board works fine.
I attempted to force the device in serial mode by setting BOOT_MODE[1:0] pins to 01, but it still isn't entering serial mode. I've checked that fuse SDP_DISABLE is 0 so I don't think that's the issue.
Does anyone have an idea why I might be seeing this issue?
Thanks,
Daniel
