Booting from USB on RPI3

[bob prohaska]

On Tue, Apr 21, 2020 at 07:18:17PM +0200, Georg Lindenberg wrote:
> Hey,
> These are the steps I took to boot my RPI3B from usb.
> 
> 1. Put the .img file on both the usb device and the SD Card (e.g. with dd).
> 2. Plug in everything. RPI starts uboot from the SD Card.
> 3.  Type any key to enter the U-Boot prompt. Then type "run usb_boot".
> 

That's a command I didn't know about, despite considerable looking.
Is it described anywhere?

It'll be my next experiment!

> You can see all the uboot variables with "env print". Maybe it is possible to add "boot_cmd=run usb_boot" to one of the config files, but I was too scared to try it.

My Pi3's setup is experimental, so crashing/corrupting it isn't a problem.

Thanks very much for writing!

bob prohaska