1) you can download uboot standalone source code and build it, then get the uboot file under the build folder
we also release the uboot demo images for downloading, you can find it from the link as below:
"https://www.nxp.com/design/software/embedded-software/i-mx-software/embedded-linux-for-i-mx-applicat...
2) board doesn't have repo, you can build it on ubuntu by yourself
3.2 Setting up the repo utility
Repo is a tool built on top of Git that makes it easier to manage projects that contain multiple repositories, which do not need to be
on the same server. Repo complements very well the layered nature of the Yocto Project, making it easier for users to add their
own layers to the BSP.
To install the “repo” utility, perform these steps:
1. Create a bin folder in the home directory.
$ mkdir ~/bin (this step may not be needed if the bin folder already exists)
$ curl https://storage.googleapis.com/git-repo-downloads/repo > ~/bin/repo
$ chmod a+x ~/bin/repo
2. Add the following line to the .bashrc file to ensure that the ~/bin folder is in your PATH variable.
export PATH=~/bin:$PATH
