projects / proxmark3-svn / blame_incremental
| Commit | Line | Data |
|---|---|---|
| 1 | #include "crc16.h"\r | |
| 2 | \r | |
| 3 | unsigned short update_crc16( unsigned short crc, unsigned char c )\r | |
| 4 | {\r | |
| 5 | unsigned short i, v, tcrc = 0;\r | |
| 6 | \r | |
| 7 | v = (crc ^ c) & 0xff;\r | |
| 8 | for (i = 0; i < 8; i++) {\r | |
| 9 | tcrc = ( (tcrc ^ v) & 1 ) ? ( tcrc >> 1 ) ^ 0x8408 : tcrc >> 1;\r | |
| 10 | v >>= 1;\r | |
| 11 | }\r | |
| 12 | \r | |
| 13 | return ((crc >> 8) ^ tcrc)&0xffff;\r | |
| 14 | }\r |