node-crc16 | calculate the 16-bit CRC of data with predetermined length | Runtime Evironment library
kandi X-RAY | node-crc16 Summary
kandi X-RAY | node-crc16 Summary
calculate the 16-bit CRC of data with predetermined length.
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QUESTION
I need to implement a CRC16 with a custom polynomial in Javascript.
ResearchAfter searching several NPM modules and this SO question ( as well as all the links the comments suggest ):
I am still not any closer to my goal.
ProblemMy problem is that even though I have the code, I can't understand how to re-use a given CRC16 solution because I don't know where to find the polynomial definition in the code. With all the shifts and whatnot it's just too cryptic for me.
QuestionHow can I have a CRC16 function with a custom polynomial ?
...ANSWER
Answered 2018-Apr-26 at 05:48The example linked has a table derived from the CRC polynomial. You can certainly find code that generates the table, given the polynomial. You can find code that computes any CRC, and code that generates CRC code, including the table, given the definition of the CRC (polynomial, bit-ordering, initial value, final xor value).
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