Initial project commit

lib/nightscout/com/eveningoutpost/dexdrip/G5Model/CRC.java

@@ -0,0 +1,25 @@
+package com.eveningoutpost.dexdrip.G5Model;
+
+import com.eveningoutpost.dexdrip.ImportedLibraries.dexcom.CRC16;
+
+/**
+ * Created by jcostik1 on 3/24/16.
+ */
+public class CRC {
+
+    public static byte[] calculate(byte b) {
+        int crcShort = 0;
+        crcShort = ((crcShort >>> 8) | (crcShort << 8)) & 0xffff;
+        crcShort ^= (b & 0xff);
+        crcShort ^= ((crcShort & 0xff) >> 4);
+        crcShort ^= (crcShort << 12) & 0xffff;
+        crcShort ^= ((crcShort & 0xFF) << 5) & 0xffff;
+        crcShort &= 0xffff;
+        return new byte[] {(byte) (crcShort & 0xff), (byte) ((crcShort >> 8) & 0xff)};
+    }
+
+    public static byte[] calculate(byte[] bytes, int start, int end) {
+        return CRC16.calculate(bytes, 0, end);
+    }
+
+}