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Commit | Line | Data |
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fdcc61d3 | 1 | #include "crc16.h" |
2 | ||
3 | unsigned short update_crc16( unsigned short crc, unsigned char c ) | |
4 | { | |
5 | unsigned short i, v, tcrc = 0; | |
6 | ||
7 | v = (crc ^ c) & 0xff; | |
8 | for (i = 0; i < 8; i++) { | |
9 | tcrc = ( (tcrc ^ v) & 1 ) ? ( tcrc >> 1 ) ^ 0x8408 : tcrc >> 1; | |
10 | v >>= 1; | |
11 | } | |
12 | ||
13 | return ((crc >> 8) ^ tcrc)&0xffff; | |
14 | } |