Raspberry Pi USB booting code, moved from tools repository
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Readme.md

USB boot code

This is the USB MSD boot code which should work on the Raspberry Pi model A, Compute Module, Compute module 3 and Raspberry Pi Zero.

This version of rpiboot has been modified to work from directories which contain the booting firmware. There is a default directory msd/ which contains bootcode.bin and start.elf to turn the Raspberry Pi device into a USB Mass Storage Device (MSD).

Building

Clone this on your Pi or an Ubuntu linux machine

$ git clone --depth=1 https://github.com/raspberrypi/usbboot
$ cd usbboot
$ sudo apt-get install libusb-1.0-0-dev
$ make
$ sudo ./rpiboot

Running your own (not MSD) build

If you would like to boot the Raspberry Pi with a standard build you just need to copy the FAT partition files into a subdirectory (it must have at the minimum bootcode.bin and start.elf). If you take a standard firmware release then this will at the very least boot the linux kernel which will then stop (and possibly crash!) when it looks for a filesystem. To provide a filesystem there are many options, you can build an initramfs into the kernel, add an initramfs to the boot directory or provide some other interface to the filesystem.

$ sudo ./rpiboot -d boot

This will serve the boot directory to the Raspberry Pi Device.