add crc8.h

.gitignore

@@ -31,4 +31,6 @@
 *.out
 *.app
 
-.DS_Store
+.DS_Store
+
+*.tar.gz

src/CRC8.h

@@ -0,0 +1,69 @@
+	/*  CRC8 library
+
+	*/
+	#ifndef CRC8_H
+	#define CRC8_H
+
+	#if ARDUINO >= 100
+	 #include "Arduino.h"
+	#else
+	 #include "WProgram.h"
+	#endif
+
+	typedef uint8_t crc;
+	#define POLYNOMIAL 0x07  /* CRC8_CCITT -- this polynomial needs to match choice on javascript end */
+	#define WIDTH  (8 * sizeof(crc))
+	#define TOPBIT (1 << (WIDTH - 1))
+
+	class CRC8 {
+	  public:
+	   CRC8();
+	   void begin();
+	   crc get_crc8(uint8_t const message[], int nBytes);
+
+	 private:
+	  uint8_t _crcTable[256];
+
+
+	};
+
+
+uint8_t const u8CRC8Table[256] = {
+0x00, 0x07, 0x0e, 0x09, 0x1c, 0x1b, 0x12, 0x15,
+0x38, 0x3f, 0x36, 0x31, 0x24, 0x23, 0x2a, 0x2d,
+0x70, 0x77, 0x7e, 0x79, 0x6c, 0x6b, 0x62, 0x65,
+0x48, 0x4f, 0x46, 0x41, 0x54, 0x53, 0x5a, 0x5d,
+0xe0, 0xe7, 0xee, 0xe9, 0xfc, 0xfb, 0xf2, 0xf5,
+0xd8, 0xdf, 0xd6, 0xd1, 0xc4, 0xc3, 0xca, 0xcd,
+0x90, 0x97, 0x9e, 0x99, 0x8c, 0x8b, 0x82, 0x85,
+0xa8, 0xaf, 0xa6, 0xa1, 0xb4, 0xb3, 0xba, 0xbd,
+0xc7, 0xc0, 0xc9, 0xce, 0xdb, 0xdc, 0xd5, 0xd2,
+0xff, 0xf8, 0xf1, 0xf6, 0xe3, 0xe4, 0xed, 0xea,
+0xb7, 0xb0, 0xb9, 0xbe, 0xab, 0xac, 0xa5, 0xa2,
+0x8f, 0x88, 0x81, 0x86, 0x93, 0x94, 0x9d, 0x9a,
+0x27, 0x20, 0x29, 0x2e, 0x3b, 0x3c, 0x35, 0x32,
+0x1f, 0x18, 0x11, 0x16, 0x03, 0x04, 0x0d, 0x0a,
+0x57, 0x50, 0x59, 0x5e, 0x4b, 0x4c, 0x45, 0x42,
+0x6f, 0x68, 0x61, 0x66, 0x73, 0x74, 0x7d, 0x7a,
+0x89, 0x8e, 0x87, 0x80, 0x95, 0x92, 0x9b, 0x9c,
+0xb1, 0xb6, 0xbf, 0xb8, 0xad, 0xaa, 0xa3, 0xa4,
+0xf9, 0xfe, 0xf7, 0xf0, 0xe5, 0xe2, 0xeb, 0xec,
+0xc1, 0xc6, 0xcf, 0xc8, 0xdd, 0xda, 0xd3, 0xd4,
+0x69, 0x6e, 0x67, 0x60, 0x75, 0x72, 0x7b, 0x7c,
+0x51, 0x56, 0x5f, 0x58, 0x4d, 0x4a, 0x43, 0x44,
+0x19, 0x1e, 0x17, 0x10, 0x05, 0x02, 0x0b, 0x0c,
+0x21, 0x26, 0x2f, 0x28, 0x3d, 0x3a, 0x33, 0x34,
+0x4e, 0x49, 0x40, 0x47, 0x52, 0x55, 0x5c, 0x5b,
+0x76, 0x71, 0x78, 0x7f, 0x6A, 0x6d, 0x64, 0x63,
+0x3e, 0x39, 0x30, 0x37, 0x22, 0x25, 0x2c, 0x2b,
+0x06, 0x01, 0x08, 0x0f, 0x1a, 0x1d, 0x14, 0x13,
+0xae, 0xa9, 0xa0, 0xa7, 0xb2, 0xb5, 0xbc, 0xbb,
+0x96, 0x91, 0x98, 0x9f, 0x8a, 0x8D, 0x84, 0x83,
+0xde, 0xd9, 0xd0, 0xd7, 0xc2, 0xc5, 0xcc, 0xcb,
+0xe6, 0xe1, 0xe8, 0xef, 0xfa, 0xfd, 0xf4, 0xf3
+};
+#define proccrc8(u8CRC, u8Data) (u8CRC8Table[u8CRC ^ u8Data])
+
+uint8_t get_enocean_crc8(uint8_t const data[], uint8_t const length);
+
+#endif