Hi "nerd" :)
We are working on updating that. The current vi-firmware master has support for receiving multi-frame messages. Here is the PR:
We are working on handling flow control for multi-frame send (see Send-Multi-Frame branches in vi-firmware, iso-tp, and uds-c). It's works when being driven by python. Working on updating Android and iOS libraries. Then documentation will be updated. A change this big has lots of moving parts.
Feel free to use it. We've been testing on Ref VI and will then check C5 platforms. Let us know any results.
Regards,
Eric