Afters days of searching on the web, i didn't find anything although CRC 16 is commonly used... Anyway ! Thanks to Nawaz Satvilkar; based on his file, I made some little modifications and get one which gives the same result that https://www.lammertbies.nl/comm/info/crc-calculation.html line CCITT xFFFF.
I hope it'll help (or save in my case !) some of you.
This file is based onCRC code generator of Nawaz Satvilkar, thanks again to him !
Create scripts with code, output, and formatted text in a single executable document.