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Use this library to implement crc checks on buffer arrays

There are two modes to calculate crc: incremental and single call:

• In first mode the crc is calculated adding data bytes one by one and then calculating final crc, this is usefulfor reception routines that receives bytes asynchrously,
• The second mode is used to obtain crc from a buffer array.Using one mode doesn't interfere with the other (So you can calculate tx crc while receiving data and updating rx crc)

Is possible to configure crc with all crc-16bit standards (by default is defined XModem).

See possible crc variants:http://www.lammertbies.nl/comm/info/crc-calculation.html