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6a9cf16c41
basically obtained from Atmel's appnote AVR067. git-svn-id: svn://svn.savannah.nongnu.org/avrdude/trunk/avrdude@452 81a1dc3b-b13d-400b-aceb-764788c761c2
26 lines
683 B
C
26 lines
683 B
C
#ifndef CRC16_H
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#define CRC16_H
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/*
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* Derived from CRC algorithm for JTAG ICE mkII, published in Atmel
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* Appnote AVR067. Converted from C++ to C.
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*/
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extern unsigned short crcsum(const unsigned char* message,
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unsigned long length,
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unsigned short crc);
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/*
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* Verify that the last two bytes is a (LSB first) valid CRC of the
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* message.
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*/
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extern int crcverify(const unsigned char* message,
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unsigned long length);
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/*
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* Append a two byte CRC (LSB first) to message. length is size of
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* message excluding crc. Space for the CRC bytes must be allocated
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* in advance!
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*/
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extern void crcappend(unsigned char* message,
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unsigned long length);
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#endif
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