JAVA CRC16
/** * CRC-16 * * <table width="400px" border="1" cellpadding="0" cellspacing="0"> * <tr> * <th>名称</th> * <th>多项式</th> * <th>初始值</th> * <th>异或值</th> * <th>Bit反转</th> * </tr> * <tr> * <td> CRC-16/IBM</td> * <td align="center">0x8005</td> * <td align="center">0x0000</td> * <td align="center">0x0000</td> * <td align="center">LSB First</td> * </tr> * <tr> * <td> CRC-16/CCITT</td> * <td align="center">0x1021</td> * <td align="center">0x0000</td> * <td align="center">0x0000</td> * <td align="center">LSB First</td> * </tr> * <tr> * <td> CRC-16/CCITT-FALSE</td> * <td align="center">0x1021</td> * <td align="center">0xFFFF</td> * <td align="center">0x0000</td> * <td align="center">MSB First</td> * </tr> * <tr> * <td> CRC-16/DECT R</td> * <td align="center">0x0589</td> * <td align="center">0x0000</td> * <td align="center">0x0001</td> * <td align="center">MSB First</td> * </tr> * <tr> * <td> CRC-16/DECT X</td> * <td align="center">0x0589</td> * <td align="center">0x0000</td> * <td align="center">0x0000</td> * <td align="center">MSB First</td> * </tr> * <tr> * <td> CRC-16/DNP</td> * <td align="center">0x3D65</td> * <td align="center">0x0000</td> * <td align="center">0xFFFF</td> * <td align="center">LSB First</td> * </tr> * <tr> * <td> CRC-16/GENIBUS</td> * <td align="center">0x1021</td> * <td align="center">0xFFFF</td> * <td align="center">0xFFFF</td> * <td align="center">MSB First</td> * </tr> * <tr> * <td> CRC-16/MAXIM</td> * <td align="center">0x8005</td> * <td align="center">0x0000</td> * <td align="center">0xFFFF</td> * <td align="center">LSB First</td> * </tr> * <tr> * <td> CRC-16/MODBUS</td> * <td align="center">0x8005</td> * <td align="center">0xFFFF</td> * <td align="center">0x0000</td> * <td align="center">LSB First</td> * </tr> * <tr> * <td> CRC-16/USB</td> * <td align="center">0x8005</td> * <td align="center">0xFFFF</td> * <td align="center">0xFFFF</td> * <td align="center">LSB First</td> * </tr> * <tr> * <td> CRC-16/X25</td> * <td align="center">0x1021</td> * <td align="center">0xFFFF</td> * <td align="center">0xFFFF</td> * <td align="center">LSB First</td> * </tr> * <tr> * <td> CRC-16/XMODEM</td> * <td align="center">0x1021</td> * <td align="center">0x0000</td> * <td align="center">0x0000</td> * <td align="center">MSB First</td> * </tr> * </table> * * @author unnamed * */ public class CRC16Utils { /** * CRC-16/IBM * * <table width="400px" border="1" cellpadding="0" cellspacing="0"> * <tr> * <th>多项式</th> * <th>初始值</th> * <th>异或值</th> * <th>Bit反转</th> * </tr> * <tr> * <td align="center">0x8005</td> * <td align="center">0x0000</td> * <td align="center">0x0000</td> * <td align="center">LSB First</td> * </tr> * </table> * * @param source * @param offset * @param length * @return */ public static int CRC16_IBM(byte[] source, int offset, int length) { int wCRCin = 0x0000; // Integer.reverse(0x8005) >>> 16 int wCPoly = 0xA001; for (int i = offset, cnt = offset + length; i < cnt; i++) { wCRCin ^= ((int) source[i] & 0x00FF); for (int j = 0; j < 8; j++) { if ((wCRCin & 0x0001) != 0) { wCRCin >>= 1; wCRCin ^= wCPoly; } else { wCRCin >>= 1; } } } return wCRCin ^= 0x0000; } /** * CRC-16/CCITT * * <table width="400px" border="1" cellpadding="0" cellspacing="0"> * <tr> * <th>多项式</th> * <th>初始值</th> * <th>异或值</th> * <th>Bit反转</th> * </tr> * <tr> * <td align="center">0x1021</td> * <td align="center">0x0000</td> * <td align="center">0x0000</td> * <td align="center">LSB First</td> * </tr> * </table> * * @param source * @param offset * @param length * @return */ public static int CRC16_CCITT(byte[] source, int offset, int length) { int wCRCin = 0x0000; // Integer.reverse(0x1021) >>> 16 int wCPoly = 0x8408; for (int i = offset, cnt = offset + length; i < cnt; i++) { wCRCin ^= ((int) source[i] & 0x00FF); for (int j = 0; j < 8; j++) { if ((wCRCin & 0x0001) != 0) { wCRCin >>= 1; wCRCin ^= wCPoly; } else { wCRCin >>= 1; } } } return wCRCin ^= 0x0000; } /** * CRC-16/CCITT-FALSE * * <table width="400px" border="1" cellpadding="0" cellspacing="0"> * <tr> * <th>多项式</th> * <th>初始值</th> * <th>异或值</th> * <th>Bit反转</th> * </tr> * <tr> * <td align="center">0x1021</td> * <td align="center">0xFFFF</td> * <td align="center">0x0000</td> * <td align="center">MSB First</td> * </tr> * </table> * * @param source * @param offset * @param length * @return */ public static int CRC16_CCITT_FALSE(byte[] source, int offset, int length) { int wCRCin = 0xFFFF; int wCPoly = 0x1021; for (int i = offset, cnt = offset + length; i < cnt; i++) { for (int j = 0; j < 8; j++) { boolean bit = ((source[i] >> (7 - j) & 1) == 1); boolean c15 = ((wCRCin >> 15 & 1) == 1); wCRCin <<= 1; if (c15 ^ bit) wCRCin ^= wCPoly; } } wCRCin &= 0xFFFF; return wCRCin ^= 0x0000; } /** * CRC-16/DECT R * * <table width="400px" border="1" cellpadding="0" cellspacing="0"> * <tr> * <th>多项式</th> * <th>初始值</th> * <th>异或值</th> * <th>Bit反转</th> * </tr> * <tr> * <td align="center">0x0589</td> * <td align="center">0x0000</td> * <td align="center">0x0001</td> * <td align="center">MSB First</td> * </tr> * </table> * * @param source * @param offset * @param length * @return */ public static int CRC16_DECT_R(byte[] source, int offset, int length) { int wCRCin = 0x0000; int wCPoly = 0x0589; for (int i = offset, cnt = offset + length; i < cnt; i++) { for (int j = 0; j < 8; j++) { boolean bit = ((source[i] >> (7 - j) & 1) == 1); boolean c15 = ((wCRCin >> 15 & 1) == 1); wCRCin <<= 1; if (c15 ^ bit) wCRCin ^= wCPoly; } } wCRCin &= 0xFFFF; return wCRCin ^= 0x0001; } /** * CRC-16/DECT X * * <table width="400px" border="1" cellpadding="0" cellspacing="0"> * <tr> * <th>多项式</th> * <th>初始值</th> * <th>异或值</th> * <th>Bit反转</th> * </tr> * <tr> * <td align="center">0x0589</td> * <td align="center">0x0000</td> * <td align="center">0x0000</td> * <td align="center">MSB First</td> * </tr> * </table> * * @param source * @param offset * @param length * @return */ public static int CRC16_DECT_X(byte[] source, int offset, int length) { int wCRCin = 0x0000; int wCPoly = 0x0589; for (int i = offset, cnt = offset + length; i < cnt; i++) { for (int j = 0; j < 8; j++) { boolean bit = ((source[i] >> (7 - j) & 1) == 1); boolean c15 = ((wCRCin >> 15 & 1) == 1); wCRCin <<= 1; if (c15 ^ bit) wCRCin ^= wCPoly; } } wCRCin &= 0xFFFF; return wCRCin ^= 0x0000; } /** * CRC-16/DNP * * <table width="400px" border="1" cellpadding="0" cellspacing="0"> * <tr> * <th>多项式</th> * <th>初始值</th> * <th>异或值</th> * <th>Bit反转</th> * </tr> * <tr> * <td align="center">0x3D65</td> * <td align="center">0x0000</td> * <td align="center">0xFFFF</td> * <td align="center">LSB First</td> * </tr> * </table> * * @param source * @param offset * @param length * @return */ public static int CRC16_DNP(byte[] source, int offset, int length) { int wCRCin = 0x0000; // Integer.reverse(0x3D65) >>> 16 int wCPoly = 0xA6BC; for (int i = offset, cnt = offset + length; i < cnt; i++) { wCRCin ^= ((int) source[i] & 0x00FF); for (int j = 0; j < 8; j++) { if ((wCRCin & 0x0001) != 0) { wCRCin >>= 1; wCRCin ^= wCPoly; } else { wCRCin >>= 1; } } } return wCRCin ^= 0xFFFF; } /** * CRC-16/GENIBUS * * <table width="400px" border="1" cellpadding="0" cellspacing="0"> * <tr> * <th>多项式</th> * <th>初始值</th> * <th>异或值</th> * <th>Bit反转</th> * </tr> * <tr> * <td align="center">0x1021</td> * <td align="center">0xFFFF</td> * <td align="center">0xFFFF</td> * <td align="center">MSB First</td> * </tr> * </table> * * @param source * @param offset * @param length * @return */ public static int CRC16_GENIBUS(byte[] source, int offset, int length) { int wCRCin = 0xFFFF; int wCPoly = 0x1021; for (int i = offset, cnt = offset + length; i < cnt; i++) { for (int j = 0; j < 8; j++) { boolean bit = ((source[i] >> (7 - j) & 1) == 1); boolean c15 = ((wCRCin >> 15 & 1) == 1); wCRCin <<= 1; if (c15 ^ bit) wCRCin ^= wCPoly; } } wCRCin &= 0xFFFF; return wCRCin ^= 0xFFFF; } /** * CRC-16/MAXIM * * <table width="400px" border="1" cellpadding="0" cellspacing="0"> * <tr> * <th>多项式</th> * <th>初始值</th> * <th>异或值</th> * <th>Bit反转</th> * </tr> * <tr> * <td align="center">0x8005</td> * <td align="center">0x0000</td> * <td align="center">0xFFFF</td> * <td align="center">LSB First</td> * </tr> * </table> * * @param source * @param offset * @param length * @return */ public static int CRC16_MAXIM(byte[] source, int offset, int length) { int wCRCin = 0x0000; // Integer.reverse(0x8005) >>> 16 int wCPoly = 0xA001; for (int i = offset, cnt = offset + length; i < cnt; i++) { wCRCin ^= ((int) source[i] & 0x00FF); for (int j = 0; j < 8; j++) { if ((wCRCin & 0x0001) != 0) { wCRCin >>= 1; wCRCin ^= wCPoly; } else { wCRCin >>= 1; } } } return wCRCin ^= 0xFFFF; } /** * CRC-16/MODBUS * * <table width="400px" border="1" cellpadding="0" cellspacing="0"> * <tr> * <th>多项式</th> * <th>初始值</th> * <th>异或值</th> * <th>Bit反转</th> * </tr> * <tr> * <td align="center">0x8005</td> * <td align="center">0xFFFF</td> * <td align="center">0x0000</td> * <td align="center">LSB First</td> * </tr> * </table> * * @param source * @param offset * @param length * @return */ public static int CRC16_MODBUS(byte[] source, int offset, int length) { int wCRCin = 0xFFFF; // Integer.reverse(0x8005) >>> 16 int wCPoly = 0xA001; for (int i = offset, cnt = offset + length; i < cnt; i++) { wCRCin ^= ((int) source[i] & 0x00FF); for (int j = 0; j < 8; j++) { if ((wCRCin & 0x0001) != 0) { wCRCin >>= 1; wCRCin ^= wCPoly; } else { wCRCin >>= 1; } } } return wCRCin ^= 0x0000; } /** * CRC-16/USB * * <table width="400px" border="1" cellpadding="0" cellspacing="0"> * <tr> * <th>多项式</th> * <th>初始值</th> * <th>异或值</th> * <th>Bit反转</th> * </tr> * <tr> * <td align="center">0x8005</td> * <td align="center">0xFFFF</td> * <td align="center">0xFFFF</td> * <td align="center">LSB First</td> * </tr> * </table> * * @param source * @param offset * @param length * @return */ public static int CRC16_USB(byte[] source, int offset, int length) { int wCRCin = 0xFFFF; // Integer.reverse(0x8005) >>> 16 int wCPoly = 0xA001; for (int i = offset, cnt = offset + length; i < cnt; i++) { wCRCin ^= ((int) source[i] & 0x00FF); for (int j = 0; j < 8; j++) { if ((wCRCin & 0x0001) != 0) { wCRCin >>= 1; wCRCin ^= wCPoly; } else { wCRCin >>= 1; } } } return wCRCin ^= 0xFFFF; } /** * CRC-16/X25 * * <table width="400px" border="1" cellpadding="0" cellspacing="0"> * <tr> * <th>多项式</th> * <th>初始值</th> * <th>异或值</th> * <th>Bit反转</th> * </tr> * <tr> * <td align="center">0x1021</td> * <td align="center">0xFFFF</td> * <td align="center">0xFFFF</td> * <td align="center">LSB First</td> * </tr> * </table> * * @param source * @param offset * @param length * @return */ public static int CRC16_X25(byte[] source, int offset, int length) { int wCRCin = 0xFFFF; // Integer.reverse(0x1021) >>> 16 int wCPoly = 0x8408; for (int i = offset, cnt = offset + length; i < cnt; i++) { wCRCin ^= ((int) source[i] & 0x00FF); for (int j = 0; j < 8; j++) { if ((wCRCin & 0x0001) != 0) { wCRCin >>= 1; wCRCin ^= wCPoly; } else { wCRCin >>= 1; } } } return wCRCin ^= 0xFFFF; } /** * CRC-16/XMODEM * * <table width="400px" border="1" cellpadding="0" cellspacing="0"> * <tr> * <th>多项式</th> * <th>初始值</th> * <th>异或值</th> * <th>Bit反转</th> * </tr> * <tr> * <td align="center">0x1021</td> * <td align="center">0x0000</td> * <td align="center">0x0000</td> * <td align="center">MSB First</td> * </tr> * </table> * * @param source * @param offset * @param length * @return */ public static int CRC16_XMODEM(byte[] source, int offset, int length) { int wCRCin = 0x0000; int wCPoly = 0x1021; for (int i = offset, cnt = offset + length; i < cnt; i++) { for (int j = 0; j < 8; j++) { boolean bit = ((source[i] >> (7 - j) & 1) == 1); boolean c15 = ((wCRCin >> 15 & 1) == 1); wCRCin <<= 1; if (c15 ^ bit) wCRCin ^= wCPoly; } } wCRCin &= 0xFFFF; return wCRCin ^= 0x0000; } }
转：https://blog.csdn.net/zte1055889498/article/details/102686777
