Step-by-Step transfer ChromiumOS image to RK3588 update image

1. Compile ChromiumOS Image. You can find the image at ~/trunk/src/build/images/inaugural/latest

Sample: Test image as `chromiumos_test_image.bin`

2. Map the image partitions to Image. Default board is fydetab_duo.

  ./map_chromiumos_image.sh <path to chromiumos_test_image.bin> [--board <board name>]

3. Create update image

  sudo ./rk3588-mkupdate.sh

4. Get you update.img at this directory. (not Image/update.img)

5. Flash update.img by upgrade tool

  cd Linux_Upgrade_Tool
  sudo ./upgrade_tool uf ../update.img