| | |
|---|
| | | * @return CRC |
|---|
| | | */ |
|---|
| | | @SuppressWarnings("unused") |
|---|
| | | public short CRC16_table(byte[] bs, int startIndex, int endIndex) { |
|---|
| | | short x ; |
|---|
| | | short crc = (short)0xffff; |
|---|
| | | public int CRC16_table(byte[] bs, int startIndex, int endIndex) { |
|---|
| | | int x ; |
|---|
| | | int crc = 0xffff; |
|---|
| | | if(bs != null && bs.length >= endIndex + 1){ |
|---|
| | | for (int i = startIndex ; i <= endIndex; i++){ |
|---|
| | | x = (short)(crc ^ bs[i]) ; |
|---|
| | | crc = (short)((crc >> 8) ^ crc16_rev_table[x & 0x00FF]) ; |
|---|
| | | x = (crc ^ bs[i]) ; |
|---|
| | | crc = ((crc >> 8) ^ crc16_rev_table[x & 0x00FF]) ; |
|---|
| | | } |
|---|
| | | } |
|---|
| | | return crc ; |
|---|
| | |
|---|
| | | } |
|---|
| | | |
|---|
| | | public static void main(String[] args) throws Exception { |
|---|
| | | //String hex = "AA0024AA |
|---|
| | | // 16015301 |
|---|
| | | // 15059980 |
|---|
| | | // 00011000 |
|---|
| | | // 00014A00 |
|---|
| | | // 5D4D5D4D |
|---|
| | | // 00004000 |
|---|
| | | // AAC616" ; |
|---|
| | | String hex = "AA0024AA16015301150599800001100000014A005D4D5D4D00004000" ; |
|---|
| | | int s = 62430 ; |
|---|
| | | //String hex = "AA0018AA16015301150599800001100000014A005D4D5D4D00004000AA7E16" ; |
|---|
| | | String hex = "AA0018AA16015301150599800001100000014A005D4D5D4D00004000" ; |
|---|
| | | byte[] bs = ByteUtil.hex2Bytes(hex) ; |
|---|
| | | // for(int i = 0 ; i < bs.length - 2 ; i++){ |
|---|
| | | // short crc = new CRC16().CRC16_table(bs, i , bs.length - 1) ; |
|---|
| | | // byte[] bytes = new byte[ProtocolConstantV206V1.UG_lenTail] ; |
|---|
| | | // ByteUtil.short2Bytes_LE(bytes, crc, 0); |
|---|
| | | // bytes[2] = ProtocolConstantV206V1.P_Tail_Byte ; |
|---|
| | | // System.out.println(ByteUtil.bytes2Hex(bytes, true)) ; |
|---|
| | | // } |
|---|
| | | System.out.println("==============================") ; |
|---|
| | | for(int i = 4 ; i < bs.length ; i++){ |
|---|
| | | short crc = new CRC16().CRC16_table(bs, 0 , i) ; |
|---|
| | | byte[] bytes = new byte[ProtocolConstantV206V1.UG_lenTail] ; |
|---|
| | | ByteUtil.short2Bytes_LE(bytes, crc, 0); |
|---|
| | | bytes[2] = ProtocolConstantV206V1.P_Tail_Byte ; |
|---|
| | | System.out.println(ByteUtil.bytes2Hex(bytes, true)) ; |
|---|
| | | } |
|---|
| | | int crc = new CRC16().CRC16_table(bs, 0 , bs.length - 1) ; |
|---|
| | | byte[] crcBs = new byte[4] ; |
|---|
| | | ByteUtil.int2Bytes_BE(crcBs, crc, 0); |
|---|
| | | System.out.println(ByteUtil.bytes2Hex(crcBs, true)) ; |
|---|
| | | } |
|---|
| | | |
|---|
| | | } |
|---|
