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DataPRO/TiltMIF/CRC16.cs

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+using System;
+using System.Collections.Generic;
+using System.Text;
+
+namespace TiltMIF
+{
+    public static class CRC16
+    {
+        private const ushort _polynomial = 0xA001;
+        private static readonly ushort[] _table = new ushort[256];
+
+        public static ushort ComputeChecksum(byte[] bytes)
+        {
+            ushort crc = 0;
+            for (int i = 0; i < bytes.Length; ++i)
+            {
+                byte index = (byte)(crc ^ bytes[i]);
+                crc = (ushort)((crc >> 8) ^ _table[index]);
+            }
+            return crc;
+        }
+
+        static CRC16()
+        {
+            ushort value;
+            ushort temp;
+            for (ushort i = 0; i < _table.Length; ++i)
+            {
+                value = 0;
+                temp = i;
+                for (byte j = 0; j < 8; ++j)
+                {
+                    if (((value ^ temp) & 0x0001) != 0)
+                    {
+                        value = (ushort)((value >> 1) ^ _polynomial);
+                    }
+                    else
+                    {
+                        value >>= 1;
+                    }
+                    temp >>= 1;
+                }
+                _table[i] = value;
+            }
+        }
+    }
+}