T-License

Usage Examples

Source:

As noted above, not all the products mention the use of T-Kernel or μT-Kernel.

Here are some examples of products or companies whose online manual refers to T-License because they either use T-Kernel or μT-Kernel.

• A licensing sheet that is provided for Brother TD-4000 printer.:
• A Samsung network camera.The Japanese manual refers to T-License on page 122.
• Clarion's open source web page (in Japanese) which lists the T-License among other licenses under which their products have been produced.:
• Extended T-Kernel RTOS from eSOL.:
• Customized ports of T-Kernel from Personal Media Corp. (in Japanese):
• "OpenTK", an enhanced version of T-Kernel with MMU support, etc. (in Japanese)

There are other products that use T-Kernel or μT-Kernel under T-License. Some of them are listed at the TRON Forum web page (in Japanese).

History

T-License was originally proposed by T-Engine Forum, which was merged into the current TRON Forum.

There is an online PDF Japanese article that explains the motivation behind T-License that was born with T-Engine, a hardware platform for developing IoT applications.

According to the original version of T-License, changing or modifying the T-Kernel source code could only be done by certain parties like A-members of T-Engine Forum and these parties must notify and register their changes with T-Engine Forum.

But this restriction has been mostly lifted since the 2.0 version, which has been in force since May, 2011.

References

References

1. (2024-05-10). "TRON Forum".
2. TRON Forum. (2020-04-01). "Form of Notice for Use of Source Code of T-Kernel 2.0 under T-License 2.2".
3. "eT-Kernel {{!}} Products {{!}} eSOL - Real-time embedded software platform solutions".
4. Brother USA. "Open Source Licensing Remarks".
5. "SAMSUNG TECHWIN ネットワークカメラ ユーザーマニュアル SNF-7010/SNF-7010V".
6. "Clarionクラリオン {{!}} オープンソースコードサイト".
7. "eT-Kernel {{!}} Products {{!}} eSOL - Real-time embedded software platform solutions".
8. "PMC T-Kernel - PMC T-Engine/T-Kernel ポータルサイト".
9. "T-Kernel 2.0 オープンソース・パッケージ「OpenTK」：日立ソリューションズ・テクノロジー".
10. TRON Forum. "TRON PROJECT 30th Anniversary: Produtcs that use TRON RTOS family (in Japanese)".
11. "T-Engine {{pipe}} Renesas Electronics".
12. "The T-Engine: Tomorrow Happening Today".
13. Sakamura, Ken. (2004-08-01). "ITRON から T-Engine へ - T-Engine の思想 (From ITRON to T-Engine - The Philosophy of T-Engine)".
14. http://tronweb.super-nova.co.jp/gpl-vs-t-license.html GPL vs T-License
15. [https://www.tron.org/download/index.php?route=information/information&information_id=57&language=en T-License 2.0 FAQ]