Finally, an open-source solution to work on and modify Nissan ECUs !
TLDR; go read USING.txt
The code, unless otherwise specified, is licensed under GPLv3 which has certain restrictions. Here is a short summary:
(emphasis mine. Source: https://tldrlegal.com/license/gnu-general-public-license-v3-(gpl-3) )
You may copy, distribute and modify the software as long as you track changes/dates in source files. Any modifications to or software including (via compiler) GPL-licensed code must also be made available under the GPL along with build & install instructions.
Commercial uses is possible, but all code linked with GPL 3.0 source code must be disclosed under a GPL 3.0 compatible license.
If you find all or parts of nisprog useful, please consider supporting me via https://liberapay.com/fenugrec/ . Thanks! I can also be reached @ fenugrec @ users.sourceforge.net, or @ nisprog @ gmail