On 23/01/22 22:00, Dan MacDonald wrote:
I installed Jetpack 4.5 a while back which changed the boot process for the Nano and now allows booting from USB which the recent Armbian releases take advantage of. The Jetpack 4.5 release notes say: "Boot firmware for all Jetson Nano developer kits updated to relocate boot firmware to integrated QSPI-NOR." https://forums.developer.nvidia.com/t/jetpack-4-5-production-release-with-l4t-32-5/166475
Nice. I saw experimental images for this, but I left it alone because I didn't want to encourage anyone to change horses in midstream.
On Sun, Jan 23, 2022 at 2:51 AM Jason Mitchell <jmitchel%bigjar.com@localhost> wrote:Okay, this is confusing to me. There's no U-Boot at all, unless it's further on. Where does the DOS partition start? Maybe hexdump up to the start of the DOS partition?
As I said earlier, I don't think there is a DOS partition. U-boot is (almost certainly) written directly to its partition without a file system. On the QSPI-NOR it'll be a proprietary partition scheme.
Do you guys have serial consoles for your Jetson Nanos? All the early boot messages and user input is done via the serial console. I have a https://www.sparkfun.com/products/9717 and I have replaced the connectors so that I can plug in RX, TX and GND without any of the others (plugging the 5V line by accident might (probably will) destroy your Jetson. Drop me an email off list if you want more details about dealing with the connector.
I don't see how you can "press any key" to interrupt U-Boot if you don't have a serial console, and if you can't interrupt U-Boot then you can't ask it to boot NetBSD.
Cheers, Lloyd