/drone-control-boot-files

Drone Control u-boot

Primary LanguageCBSD 2-Clause "Simplified" LicenseBSD-2-Clause

Drone control Boot Files

This repository contains files used for booting the Kimchi SBC and supported add-on boards.

System Requirements

If you'd like to build the binaries for booting the board, you'll need a couple host tools. U-boot tools compile the boot scripts, and a device tree compiler for the device tree overlays.

Debian or Ubuntu:

sudo apt install u-boot-tools device-tree-compiler

MacOS:

brew install u-boot-tools dtc

Building

Simply run:

make

Deploying to Target for Testing

Network (Ethernet or WiFi from Linux)

The boot files are (by default) located on a FAT partition on EMMC. If you have a network connection, you can do the following

ssh root@drone-control mount /dev/mmcblk0p1 /boot
scp -r output/* root@drone-control:/boot/

USB

The files can be loaded with uuu and fastboot running on u-boot through the USB-C port. First you need to get u-boot into fastboot mode.

  • Starting fastboot via UART

    If you have a serial connection, you can press Ctrl-C while u-boot is loading to interrupt the normal boot process and then run:

    fastboot usb 0

  • Starting fastboot via USB

    You may use uuu to download and start u-boot from memory. This will automatically put u-boot in fastboot mode after starting. You'll need a copy of the u-boot image, which may be built from source or found in the Yocto deploy directory. Run the following:

    sudo uuu -b spl imx-boot

Now that the board is running fastboot (you'll see a blue LED lit), you can download the boot files to EMMC:

cd output
sudo uuu -v -b fat_write * mmc 0:1

To boot the board after downloading, the following can be run. Note that this command will timeout as control does not return to fastboot for a reply:

sudo uuu FB: ucmd boot