X-Git-Url: http://git.zerfleddert.de/cgi-bin/gitweb.cgi/proxmark3-svn/blobdiff_plain/1569d97730d80a0a303b74b714bb59272349c3b2..0c2ed92d876c32abce11daf86eea4bcece6fa6fa:/common/crc16.c

diff --git a/common/crc16.c b/common/crc16.c
new file mode 100644
index 00000000..6cdf3ea3
--- /dev/null
+++ b/common/crc16.c
@@ -0,0 +1,11 @@
+unsigned short update_crc16( WORD crc, BYTE c ) {
+	WORD i, v, tcrc = 0;
+
+	v = (crc ^ c) & 0xff;
+  for (i = 0; i < 8; i++) {
+      tcrc = ( (tcrc ^ v) & 1 ) ? ( tcrc >> 1 ) ^ 0x8408 : tcrc >> 1;
+      v >>= 1;
+  }
+
+  return (crc >> 8) ^ tcrc;
+}