We have two type of flashing
1. Flash the image directly into USB. And boot using it.
2. Copy the files into the USB drive. Then boot into initramfs. Then flash the image into the eMMC.

## Flashing into eMMC
1. `make release`
2. Format the USB in vfat
3. Copy out/[RELEASE].img.gz and out/board.itb to your usb drive's root
4. Run
```
usb start
usb tree
fatls usb 0:1   # For fat
ext4ls usb 0:1  # For ext4 if you insist
fatload usb 0 0x80000000 board.itb

setenv bootargs "console=ttyS0,115200 earlycon=uart8250,mmio,0x21c0500 root=/dev/ram0 rootwait rw"
bootm 0x80000000
```

5. Inside initramfs, run
```
flash-emmc.sh
```

4. If it boots, create the A/B deployment scheme
 - (WORK IN PROGRESS)

## Flashing into USB
On MacOS
1. ./macos/flashusb.sh

On Windows (Work In Progress)