RM57L843: Ethernet sample codes

Hi,

My customer is looking for Ethernet example for RM57L843.
He found below document on TI.com. Is this the right one?
https://www.ti.com/lit/an/spna239/spna239.pdf

If you have other examples, let me know, please.

And the page#2 of above document, there is a link to IwIP Demo.
http://git.ti.com/hercules_examples/hercules_examples/trees/master/Application/LwIP
Customer can see each files, but it is not clear how to download whole project.
Could you tell me how to download all files at once?

Thanks and regards,
Koichiro Tashiro