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| package com.sandu.ximon.admin.manager.iot.rrpc.util;
|
| /**
| * Created by 11833 on 2018/1/5.
| */
| public class CRCValidate {
|
| private static final String TAG="CRCValidate";
| /**
| * 计算CRC
| * */
| public static final int[] calculateCRC(byte[] data, int offset, int len) {
|
| int[] crc = { 0xFF, 0xFF };
|
| int nextByte = 0;
|
| int uIndex;
|
| for (int i = offset; i < len && i < data.length; i++) {
|
| nextByte = 0xFF & ((int) data[i]);
|
| uIndex = crc[0] ^ nextByte;
|
| crc[0] = crc[1] ^ auchCRCHi[uIndex];
|
| crc[1] = auchCRCLo[uIndex];
|
| }
|
| return crc;
|
| }// calculateCRC
|
| /**
| * 锟斤拷锟斤拷一位CRC??锟斤拷锟斤拷位锟斤拷锟?
| * 锟斤拷一锟斤拷锟斤拷锟斤拷锟斤拷要锟斤拷锟斤拷锟絙uff
| * 锟斤拷一锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷始位锟斤拷
| * 锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟姐长锟斤拷
| *
| * */
| public static final int calculateSingleCRC(byte[] data, int offset, int len) {
|
| int crc = data[offset];
|
| /* pass through message buffer */
|
| for (int i = offset+1; i < (offset+len) && i < data.length; i++) {
|
| crc = crc ^ ((int) data[i]); // *puchMsg++; /* calculate the CRC */
|
| }
|
| return crc;
|
| }
|
| /**
| * /锟斤拷锟斤拷CRC?? 锟斤拷一锟斤拷锟斤拷锟斤拷锟斤拷要锟斤拷锟斤拷锟絚alcStr
| * // "01 10 00 5e 00 02 04 11 12 13 14"锟矫碉拷crc="df 19"
| */
| public static final String calculateStringCRC(String calcStr) {
|
| String crcStr = null;
| if (SupplementUtils.isHex(calcStr)) {
| byte[] data = SupplementUtils.hexStringToBytes(calcStr);
| int[] crcIntArr = CRCValidate.calculateCRC(data, 0, data.length);
| byte[] crcByteArr1 = { 0, (byte) crcIntArr[0] };
| byte[] crcByteArr2 = { 0, (byte) crcIntArr[1] };
| // String crcStr1 = HexStrConvertUtil.bytesToHexString(crcByteArr1).substring(2);
| // String crcStr2 = HexStrConvertUtil.bytesToHexString(crcByteArr2).substring(2);
| // crcStr = crcStr1 + " " + crcStr2;
| }
|
| return crcStr.toLowerCase();
|
| }
|
| /* Table of CRC values for high-order byte */
|
| private final static short[] auchCRCHi = {
|
| 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x01, 0xC0,
|
| 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41,
|
| 0x00, 0xC1, 0x81, 0x40, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0,
|
| 0x80, 0x41, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40,
|
| 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1,
|
| 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x01, 0xC0, 0x80, 0x41,
|
| 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1,
|
| 0x81, 0x40, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41,
|
| 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x01, 0xC0,
|
| 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x00, 0xC1, 0x81, 0x40,
|
| 0x01, 0xC0, 0x80, 0x41, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1,
|
| 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40,
|
| 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x01, 0xC0,
|
| 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x00, 0xC1, 0x81, 0x40,
|
| 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0,
|
| 0x80, 0x41, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40,
|
| 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x01, 0xC0,
|
| 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41,
|
| 0x00, 0xC1, 0x81, 0x40, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0,
|
| 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41,
|
| 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0,
|
| 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40, 0x00, 0xC1, 0x81, 0x40,
|
| 0x01, 0xC0, 0x80, 0x41, 0x01, 0xC0, 0x80, 0x41, 0x00, 0xC1,
|
| 0x81, 0x40, 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41,
|
| 0x00, 0xC1, 0x81, 0x40, 0x01, 0xC0, 0x80, 0x41, 0x01, 0xC0,
|
| 0x80, 0x41, 0x00, 0xC1, 0x81, 0x40
|
| };
|
| /* Table of CRC values for low-order byte */
|
| private final static short[] auchCRCLo = {
|
| 0x00, 0xC0, 0xC1, 0x01, 0xC3, 0x03, 0x02, 0xC2, 0xC6, 0x06,
|
| 0x07, 0xC7, 0x05, 0xC5, 0xC4, 0x04, 0xCC, 0x0C, 0x0D, 0xCD,
|
| 0x0F, 0xCF, 0xCE, 0x0E, 0x0A, 0xCA, 0xCB, 0x0B, 0xC9, 0x09,
|
| 0x08, 0xC8, 0xD8, 0x18, 0x19, 0xD9, 0x1B, 0xDB, 0xDA, 0x1A,
|
| 0x1E, 0xDE, 0xDF, 0x1F, 0xDD, 0x1D, 0x1C, 0xDC, 0x14, 0xD4,
|
| 0xD5, 0x15, 0xD7, 0x17, 0x16, 0xD6, 0xD2, 0x12, 0x13, 0xD3,
|
| 0x11, 0xD1, 0xD0, 0x10, 0xF0, 0x30, 0x31, 0xF1, 0x33, 0xF3,
|
| 0xF2, 0x32, 0x36, 0xF6, 0xF7, 0x37, 0xF5, 0x35, 0x34, 0xF4,
|
| 0x3C, 0xFC, 0xFD, 0x3D, 0xFF, 0x3F, 0x3E, 0xFE, 0xFA, 0x3A,
|
| 0x3B, 0xFB, 0x39, 0xF9, 0xF8, 0x38, 0x28, 0xE8, 0xE9, 0x29,
|
| 0xEB, 0x2B, 0x2A, 0xEA, 0xEE, 0x2E, 0x2F, 0xEF, 0x2D, 0xED,
|
| 0xEC, 0x2C, 0xE4, 0x24, 0x25, 0xE5, 0x27, 0xE7, 0xE6, 0x26,
|
| 0x22, 0xE2, 0xE3, 0x23, 0xE1, 0x21, 0x20, 0xE0, 0xA0, 0x60,
|
| 0x61, 0xA1, 0x63, 0xA3, 0xA2, 0x62, 0x66, 0xA6, 0xA7, 0x67,
|
| 0xA5, 0x65, 0x64, 0xA4, 0x6C, 0xAC, 0xAD, 0x6D, 0xAF, 0x6F,
|
| 0x6E, 0xAE, 0xAA, 0x6A, 0x6B, 0xAB, 0x69, 0xA9, 0xA8, 0x68,
|
| 0x78, 0xB8, 0xB9, 0x79, 0xBB, 0x7B, 0x7A, 0xBA, 0xBE, 0x7E,
|
| 0x7F, 0xBF, 0x7D, 0xBD, 0xBC, 0x7C, 0xB4, 0x74, 0x75, 0xB5,
|
| 0x77, 0xB7, 0xB6, 0x76, 0x72, 0xB2, 0xB3, 0x73, 0xB1, 0x71,
|
| 0x70, 0xB0, 0x50, 0x90, 0x91, 0x51, 0x93, 0x53, 0x52, 0x92,
|
| 0x96, 0x56, 0x57, 0x97, 0x55, 0x95, 0x94, 0x54, 0x9C, 0x5C,
|
| 0x5D, 0x9D, 0x5F, 0x9F, 0x9E, 0x5E, 0x5A, 0x9A, 0x9B, 0x5B,
|
| 0x99, 0x59, 0x58, 0x98, 0x88, 0x48, 0x49, 0x89, 0x4B, 0x8B,
|
| 0x8A, 0x4A, 0x4E, 0x8E, 0x8F, 0x4F, 0x8D, 0x4D, 0x4C, 0x8C,
|
| 0x44, 0x84, 0x85, 0x45, 0x87, 0x47, 0x46, 0x86, 0x82, 0x42,
|
| 0x43, 0x83, 0x41, 0x81, 0x80, 0x40
|
| };
|
| /*
| * 锟叫讹拷CRC值锟角凤拷锟斤拷确--CRC校锟斤拷
| */
| public static Boolean isCRCConfig(byte[] buff) {
| int offset = 0;
| int len = buff.length - 2;
| // 锟斤拷锟斤拷前锟斤拷模锟斤拷锟街凤拷锟街革拷睢拷锟斤拷荩锟斤拷锟斤拷锟叫ｏ拷锟斤拷耄╋拷锟?
| // 锟斤拷锟斤拷CRC值,(锟斤拷一锟斤拷锟斤拷锟斤拷锟斤拷要锟斤拷锟斤拷锟絙uff 锟斤拷一锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷始位 锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟斤拷锟姐长锟斤拷)
| int[] crc = CRCValidate.calculateCRC(buff, offset, len);
| // 锟饺斤拷buff锟斤拷锟斤拷锟斤拷锟轿籆RC锟斤拷锟角凤拷锟斤拷诩锟斤拷锟斤拷锟斤拷锟斤拷CRC锟斤拷
| return (byte) crc[0] == buff[buff.length - 2] & (byte) crc[1] == buff[buff.length - 1];
| }
|
|
| }
|
|
