From b58f98eb958755e09af2b598f93001aaed16e9ae Mon Sep 17 00:00:00 2001 From: Looly Date: Sat, 18 Jul 2020 10:53:11 +0800 Subject: [PATCH] add crc16 --- .../cn/hutool/core/io/checksum/CRC16.java | 69 +++++----------- .../core/io/checksum/crc16/CRC16CCITT.java | 26 ++++++ .../io/checksum/crc16/CRC16CCITTFalse.java | 33 ++++++++ .../core/io/checksum/crc16/CRC16Checksum.java | 45 ++++++++++ .../core/io/checksum/crc16/CRC16DNP.java | 32 ++++++++ .../core/io/checksum/crc16/CRC16IBM.java | 26 ++++++ .../core/io/checksum/crc16/CRC16Maxim.java | 32 ++++++++ .../core/io/checksum/crc16/CRC16Modbus.java | 31 +++++++ .../core/io/checksum/crc16/CRC16USB.java | 36 ++++++++ .../core/io/checksum/crc16/CRC16X25.java | 36 ++++++++ .../core/io/checksum/crc16/CRC16XModem.java | 31 +++++++ .../core/io/checksum/crc16/package-info.java | 7 ++ .../cn/hutool/core/io/checksum/CRC16Test.java | 82 +++++++++++++++++++ 13 files changed, 438 insertions(+), 48 deletions(-) create mode 100644 hutool-core/src/main/java/cn/hutool/core/io/checksum/crc16/CRC16CCITT.java create mode 100644 hutool-core/src/main/java/cn/hutool/core/io/checksum/crc16/CRC16CCITTFalse.java create mode 100644 hutool-core/src/main/java/cn/hutool/core/io/checksum/crc16/CRC16Checksum.java create mode 100644 hutool-core/src/main/java/cn/hutool/core/io/checksum/crc16/CRC16DNP.java create mode 100644 hutool-core/src/main/java/cn/hutool/core/io/checksum/crc16/CRC16IBM.java create mode 100644 hutool-core/src/main/java/cn/hutool/core/io/checksum/crc16/CRC16Maxim.java create mode 100644 hutool-core/src/main/java/cn/hutool/core/io/checksum/crc16/CRC16Modbus.java create mode 100644 hutool-core/src/main/java/cn/hutool/core/io/checksum/crc16/CRC16USB.java create mode 100644 hutool-core/src/main/java/cn/hutool/core/io/checksum/crc16/CRC16X25.java create mode 100644 hutool-core/src/main/java/cn/hutool/core/io/checksum/crc16/CRC16XModem.java create mode 100644 hutool-core/src/main/java/cn/hutool/core/io/checksum/crc16/package-info.java create mode 100644 hutool-core/src/test/java/cn/hutool/core/io/checksum/CRC16Test.java diff --git a/hutool-core/src/main/java/cn/hutool/core/io/checksum/CRC16.java b/hutool-core/src/main/java/cn/hutool/core/io/checksum/CRC16.java index 2017418c5..72084346b 100644 --- a/hutool-core/src/main/java/cn/hutool/core/io/checksum/CRC16.java +++ b/hutool-core/src/main/java/cn/hutool/core/io/checksum/CRC16.java @@ -1,76 +1,49 @@ package cn.hutool.core.io.checksum; -import java.io.Serializable; -import java.util.zip.Checksum; +import cn.hutool.core.io.checksum.crc16.CRC16Checksum; +import cn.hutool.core.io.checksum.crc16.CRC16IBM; /** - * CRC16 循环冗余校验码（Cyclic Redundancy Check）实现
- * 代码来自：https://github.com/BBSc0der - * + * CRC16 循环冗余校验码（Cyclic Redundancy Check）实现，默认IBM算法 + * * @author looly * @since 4.4.1 */ -public class CRC16 implements Checksum, Serializable { +public class CRC16 extends CRC16Checksum { private static final long serialVersionUID = 1L; - // CRC16 = bb3d - // Uses irreducible polynomial: 1 + x^2 + x^15 + x^16 + private final CRC16Checksum crc16; - private static final int[] TABLE = { // - 0x0000, 0xc0c1, 0xc181, 0x0140, 0xc301, 0x03c0, 0x0280, 0xc241, // - 0xc601, 0x06c0, 0x0780, 0xc741, 0x0500, 0xc5c1, 0xc481, 0x0440, // - 0xcc01, 0x0cc0, 0x0d80, 0xcd41, 0x0f00, 0xcfc1, 0xce81, 0x0e40, // - 0x0a00, 0xcac1, 0xcb81, 0x0b40, 0xc901, 0x09c0, 0x0880, 0xc841, // - 0xd801, 0x18c0, 0x1980, 0xd941, 0x1b00, 0xdbc1, 0xda81, 0x1a40, // - 0x1e00, 0xdec1, 0xdf81, 0x1f40, 0xdd01, 0x1dc0, 0x1c80, 0xdc41, // - 0x1400, 0xd4c1, 0xd581, 0x1540, 0xd701, 0x17c0, 0x1680, 0xd641, // - 0xd201, 0x12c0, 0x1380, 0xd341, 0x1100, 0xd1c1, 0xd081, 0x1040, // - 0xf001, 0x30c0, 0x3180, 0xf141, 0x3300, 0xf3c1, 0xf281, 0x3240, // - 0x3600, 0xf6c1, 0xf781, 0x3740, 0xf501, 0x35c0, 0x3480, 0xf441, // - 0x3c00, 0xfcc1, 0xfd81, 0x3d40, 0xff01, 0x3fc0, 0x3e80, 0xfe41, // - 0xfa01, 0x3ac0, 0x3b80, 0xfb41, 0x3900, 0xf9c1, 0xf881, 0x3840, // - 0x2800, 0xe8c1, 0xe981, 0x2940, 0xeb01, 0x2bc0, 0x2a80, 0xea41, // - 0xee01, 0x2ec0, 0x2f80, 0xef41, 0x2d00, 0xedc1, 0xec81, 0x2c40, // - 0xe401, 0x24c0, 0x2580, 0xe541, 0x2700, 0xe7c1, 0xe681, 0x2640, // - 0x2200, 0xe2c1, 0xe381, 0x2340, 0xe101, 0x21c0, 0x2080, 0xe041, // - 0xa001, 0x60c0, 0x6180, 0xa141, 0x6300, 0xa3c1, 0xa281, 0x6240, // - 0x6600, 0xa6c1, 0xa781, 0x6740, 0xa501, 0x65c0, 0x6480, 0xa441, // - 0x6c00, 0xacc1, 0xad81, 0x6d40, 0xaf01, 0x6fc0, 0x6e80, 0xae41, // - 0xaa01, 0x6ac0, 0x6b80, 0xab41, 0x6900, 0xa9c1, 0xa881, 0x6840, // - 0x7800, 0xb8c1, 0xb981, 0x7940, 0xbb01, 0x7bc0, 0x7a80, 0xba41, // - 0xbe01, 0x7ec0, 0x7f80, 0xbf41, 0x7d00, 0xbdc1, 0xbc81, 0x7c40, // - 0xb401, 0x74c0, 0x7580, 0xb541, 0x7700, 0xb7c1, 0xb681, 0x7640, // - 0x7200, 0xb2c1, 0xb381, 0x7340, 0xb101, 0x71c0, 0x7080, 0xb041, // - 0x5000, 0x90c1, 0x9181, 0x5140, 0x9301, 0x53c0, 0x5280, 0x9241, // - 0x9601, 0x56c0, 0x5780, 0x9741, 0x5500, 0x95c1, 0x9481, 0x5440, // - 0x9c01, 0x5cc0, 0x5d80, 0x9d41, 0x5f00, 0x9fc1, 0x9e81, 0x5e40, // - 0x5a00, 0x9ac1, 0x9b81, 0x5b40, 0x9901, 0x59c0, 0x5880, 0x9841, // - 0x8801, 0x48c0, 0x4980, 0x8941, 0x4b00, 0x8bc1, 0x8a81, 0x4a40, // - 0x4e00, 0x8ec1, 0x8f81, 0x4f40, 0x8d01, 0x4dc0, 0x4c80, 0x8c41, // - 0x4400, 0x84c1, 0x8581, 0x4540, 0x8701, 0x47c0, 0x4680, 0x8641, // - 0x8201, 0x42c0, 0x4380, 0x8341, 0x4100, 0x81c1, 0x8081, 0x4040// - }; + CRC16(){ + this(new CRC16IBM()); + } - private int sum = 0x0000; + /** + * 构造 + * + * @param crc16Checksum {@link CRC16Checksum} 实现 + */ + CRC16(CRC16Checksum crc16Checksum){ + this.crc16 = crc16Checksum; + } @Override public long getValue() { - return sum; + return crc16.getValue(); } @Override public void reset() { - sum = 0x0000; + crc16.reset(); } @Override public void update(byte[] b, int off, int len) { - for (int i = off; i < off + len; i++) - update(b[i]); + crc16.update(b, off, len); } @Override public void update(int b) { - sum = (sum >> 8) ^ TABLE[((sum) ^ (b & 0xff)) & 0xff]; + crc16.update(b); } } diff --git a/hutool-core/src/main/java/cn/hutool/core/io/checksum/crc16/CRC16CCITT.java b/hutool-core/src/main/java/cn/hutool/core/io/checksum/crc16/CRC16CCITT.java new file mode 100644 index 000000000..7811855e3 --- /dev/null +++ b/hutool-core/src/main/java/cn/hutool/core/io/checksum/crc16/CRC16CCITT.java @@ -0,0 +1,26 @@ +package cn.hutool.core.io.checksum.crc16; + +/** + * CRC16_CCITT：多项式x16+x12+x5+1（0x1021），初始值0x0000，低位在前，高位在后，结果与0x0000异或 + * 0x8408是0x1021按位颠倒后的结果。 + * + * @author looly + * @since 5.3.10 + */ +public class CRC16CCITT extends CRC16Checksum{ + + private static final int wCPoly = 0x8408; + + @Override + public void update(int b) { + wCRCin ^= (b & 0x00ff); + for (int j = 0; j < 8; j++) { + if ((wCRCin & 0x0001) != 0) { + wCRCin >>= 1; + wCRCin ^= wCPoly; + } else { + wCRCin >>= 1; + } + } + } +} diff --git a/hutool-core/src/main/java/cn/hutool/core/io/checksum/crc16/CRC16CCITTFalse.java b/hutool-core/src/main/java/cn/hutool/core/io/checksum/crc16/CRC16CCITTFalse.java new file mode 100644 index 000000000..7e24206d7 --- /dev/null +++ b/hutool-core/src/main/java/cn/hutool/core/io/checksum/crc16/CRC16CCITTFalse.java @@ -0,0 +1,33 @@ +package cn.hutool.core.io.checksum.crc16; + +/** + * CRC16_CCITT_FALSE：多项式x16+x12+x5+1（0x1021），初始值0xFFFF，低位在后，高位在前，结果与0x0000异或 + * + * @author looly + * @since 5.3.10 + */ +public class CRC16CCITTFalse extends CRC16Checksum{ + + private static final int wCPoly = 0x1021; + + public CRC16CCITTFalse(){ + this.wCRCin = 0xffff; + } + + @Override + public void update(byte[] b, int off, int len) { + super.update(b, off, len); + wCRCin &= 0xffff; + } + + @Override + public void update(int b) { + for (int i = 0; i < 8; i++) { + boolean bit = ((b >> (7 - i) & 1) == 1); + boolean c15 = ((wCRCin >> 15 & 1) == 1); + wCRCin <<= 1; + if (c15 ^ bit) + wCRCin ^= wCPoly; + } + } +} diff --git a/hutool-core/src/main/java/cn/hutool/core/io/checksum/crc16/CRC16Checksum.java b/hutool-core/src/main/java/cn/hutool/core/io/checksum/crc16/CRC16Checksum.java new file mode 100644 index 000000000..5836cf3a4 --- /dev/null +++ b/hutool-core/src/main/java/cn/hutool/core/io/checksum/crc16/CRC16Checksum.java @@ -0,0 +1,45 @@ +package cn.hutool.core.io.checksum.crc16; + +import java.io.Serializable; +import java.util.zip.Checksum; + +/** + * CRC16 Checksum，用于提供多种CRC16算法的通用实现
+ * 通过继承此类，重写update和reset完成相应算法。 + * + * @author looly + * @since 5.3.10 + */ +public abstract class CRC16Checksum implements Checksum, Serializable { + private static final long serialVersionUID = 1L; + + /** + * CRC16 Checksum 结果值 + */ + protected int wCRCin = 0x0000; + + @Override + public long getValue() { + return wCRCin; + } + + @Override + public void reset() { + wCRCin = 0x0000; + } + + /** + * 计算全部字节 + * @param b 字节 + */ + public void update(byte[] b){ + update(b, 0, b.length); + } + + @Override + public void update(byte[] b, int off, int len) { + for (int i = off; i < off + len; i++) + update(b[i]); + } + +} diff --git a/hutool-core/src/main/java/cn/hutool/core/io/checksum/crc16/CRC16DNP.java b/hutool-core/src/main/java/cn/hutool/core/io/checksum/crc16/CRC16DNP.java new file mode 100644 index 000000000..fe89a00f0 --- /dev/null +++ b/hutool-core/src/main/java/cn/hutool/core/io/checksum/crc16/CRC16DNP.java @@ -0,0 +1,32 @@ +package cn.hutool.core.io.checksum.crc16; + +/** + * CRC16_DNP：多项式x16+x13+x12+x11+x10+x8+x6+x5+x2+1（0x3D65），初始值0x0000，低位在前，高位在后，结果与0xFFFF异或 + * 0xA6BC是0x3D65按位颠倒后的结果 + * + * @author looly + * @since 5.3.10 + */ +public class CRC16DNP extends CRC16Checksum{ + + private static final int wCPoly = 0xA6BC; + + @Override + public void update(byte[] b, int off, int len) { + super.update(b, off, len); + wCRCin ^= 0xffff; + } + + @Override + public void update(int b) { + wCRCin ^= (b & 0x00ff); + for (int j = 0; j < 8; j++) { + if ((wCRCin & 0x0001) != 0) { + wCRCin >>= 1; + wCRCin ^= wCPoly; + } else { + wCRCin >>= 1; + } + } + } +} diff --git a/hutool-core/src/main/java/cn/hutool/core/io/checksum/crc16/CRC16IBM.java b/hutool-core/src/main/java/cn/hutool/core/io/checksum/crc16/CRC16IBM.java new file mode 100644 index 000000000..1c340d29f --- /dev/null +++ b/hutool-core/src/main/java/cn/hutool/core/io/checksum/crc16/CRC16IBM.java @@ -0,0 +1,26 @@ +package cn.hutool.core.io.checksum.crc16; + +/** + * CRC16_IBM：多项式x16+x15+x2+1（0x8005），初始值0x0000，低位在前，高位在后，结果与0x0000异或 + * 0xA001是0x8005按位颠倒后的结果 + * + * @author looly + * @since 5.3.10 + */ +public class CRC16IBM extends CRC16Checksum{ + + private static final int wCPoly = 0xa001; + + @Override + public void update(int b) { + wCRCin ^= (b & 0x00ff); + for (int j = 0; j < 8; j++) { + if ((wCRCin & 0x0001) != 0) { + wCRCin >>= 1; + wCRCin ^= wCPoly; + } else { + wCRCin >>= 1; + } + } + } +} diff --git a/hutool-core/src/main/java/cn/hutool/core/io/checksum/crc16/CRC16Maxim.java b/hutool-core/src/main/java/cn/hutool/core/io/checksum/crc16/CRC16Maxim.java new file mode 100644 index 000000000..195bd55bf --- /dev/null +++ b/hutool-core/src/main/java/cn/hutool/core/io/checksum/crc16/CRC16Maxim.java @@ -0,0 +1,32 @@ +package cn.hutool.core.io.checksum.crc16; + +/** + * CRC16_MAXIM：多项式x16+x15+x2+1（0x8005），初始值0x0000，低位在前，高位在后，结果与0xFFFF异或 + * 0xA001是0x8005按位颠倒后的结果 + * + * @author looly + * @since 5.3.10 + */ +public class CRC16Maxim extends CRC16Checksum{ + + private static final int wCPoly = 0xa001; + + @Override + public void update(byte[] b, int off, int len) { + super.update(b, off, len); + wCRCin ^= 0xffff; + } + + @Override + public void update(int b) { + wCRCin ^= (b & 0x00ff); + for (int j = 0; j < 8; j++) { + if ((wCRCin & 0x0001) != 0) { + wCRCin >>= 1; + wCRCin ^= wCPoly; + } else { + wCRCin >>= 1; + } + } + } +} diff --git a/hutool-core/src/main/java/cn/hutool/core/io/checksum/crc16/CRC16Modbus.java b/hutool-core/src/main/java/cn/hutool/core/io/checksum/crc16/CRC16Modbus.java new file mode 100644 index 000000000..5aabdce76 --- /dev/null +++ b/hutool-core/src/main/java/cn/hutool/core/io/checksum/crc16/CRC16Modbus.java @@ -0,0 +1,31 @@ +package cn.hutool.core.io.checksum.crc16; + +/** + * CRC-16 (Modbus) + * CRC16_MODBUS：多项式x16+x15+x2+1（0x8005），初始值0xFFFF，低位在前，高位在后，结果与0x0000异或 + * 0xA001是0x8005按位颠倒后的结果 + * + * @author looly + * @since 5.3.10 + */ +public class CRC16Modbus extends CRC16Checksum{ + + private static final int wCPoly = 0xa001; + + public CRC16Modbus(){ + this.wCRCin = 0xffff; + } + + @Override + public void update(int b) { + wCRCin ^= ((int) b & 0x00ff); + for (int j = 0; j < 8; j++) { + if ((wCRCin & 0x0001) != 0) { + wCRCin >>= 1; + wCRCin ^= wCPoly; + } else { + wCRCin >>= 1; + } + } + } +} diff --git a/hutool-core/src/main/java/cn/hutool/core/io/checksum/crc16/CRC16USB.java b/hutool-core/src/main/java/cn/hutool/core/io/checksum/crc16/CRC16USB.java new file mode 100644 index 000000000..1c6265f34 --- /dev/null +++ b/hutool-core/src/main/java/cn/hutool/core/io/checksum/crc16/CRC16USB.java @@ -0,0 +1,36 @@ +package cn.hutool.core.io.checksum.crc16; + +/** + * CRC16_USB：多项式x16+x15+x2+1（0x8005），初始值0xFFFF，低位在前，高位在后，结果与0xFFFF异或 + * 0xA001是0x8005按位颠倒后的结果 + * + * @author looly + * @since 5.3.10 + */ +public class CRC16USB extends CRC16Checksum{ + + private static final int wCPoly = 0xa001; + + public CRC16USB(){ + this.wCRCin = 0xFFFF; + } + + @Override + public void update(byte[] b, int off, int len) { + super.update(b, off, len); + wCRCin ^= 0xffff; + } + + @Override + public void update(int b) { + wCRCin ^= (b & 0x00ff); + for (int j = 0; j < 8; j++) { + if ((wCRCin & 0x0001) != 0) { + wCRCin >>= 1; + wCRCin ^= wCPoly; + } else { + wCRCin >>= 1; + } + } + } +} diff --git a/hutool-core/src/main/java/cn/hutool/core/io/checksum/crc16/CRC16X25.java b/hutool-core/src/main/java/cn/hutool/core/io/checksum/crc16/CRC16X25.java new file mode 100644 index 000000000..7bf7ff7c6 --- /dev/null +++ b/hutool-core/src/main/java/cn/hutool/core/io/checksum/crc16/CRC16X25.java @@ -0,0 +1,36 @@ +package cn.hutool.core.io.checksum.crc16; + +/** + * CRC16_X25：多项式x16+x12+x5+1（0x1021），初始值0xffff，低位在前，高位在后，结果与0xFFFF异或 + * 0x8408是0x1021按位颠倒后的结果。 + * + * @author looly + * @since 5.3.10 + */ +public class CRC16X25 extends CRC16Checksum{ + + private static final int wCPoly = 0x8408; + + public CRC16X25(){ + this.wCRCin = 0xffff; + } + + @Override + public void update(byte[] b, int off, int len) { + super.update(b, off, len); + wCRCin ^= 0xffff; + } + + @Override + public void update(int b) { + wCRCin ^= (b & 0x00ff); + for (int j = 0; j < 8; j++) { + if ((wCRCin & 0x0001) != 0) { + wCRCin >>= 1; + wCRCin ^= wCPoly; + } else { + wCRCin >>= 1; + } + } + } +} diff --git a/hutool-core/src/main/java/cn/hutool/core/io/checksum/crc16/CRC16XModem.java b/hutool-core/src/main/java/cn/hutool/core/io/checksum/crc16/CRC16XModem.java new file mode 100644 index 000000000..86689e6c9 --- /dev/null +++ b/hutool-core/src/main/java/cn/hutool/core/io/checksum/crc16/CRC16XModem.java @@ -0,0 +1,31 @@ +package cn.hutool.core.io.checksum.crc16; + +/** + * CRC-CCITT (XModem) + * CRC16_XMODEM：多项式x16+x12+x5+1（0x1021），初始值0x0000，低位在后，高位在前，结果与0x0000异或 + * + * @author looly + * @since 5.3.10 + */ +public class CRC16XModem extends CRC16Checksum{ + + // 0001 0000 0010 0001 (0, 5, 12) + private static final int wCPoly = 0x1021; + + @Override + public void update(byte[] b, int off, int len) { + super.update(b, off, len); + wCRCin &= 0xffff; + } + + @Override + public void update(int b) { + for (int i = 0; i < 8; i++) { + boolean bit = ((b >> (7 - i) & 1) == 1); + boolean c15 = ((wCRCin >> 15 & 1) == 1); + wCRCin <<= 1; + if (c15 ^ bit) + wCRCin ^= wCPoly; + } + } +} diff --git a/hutool-core/src/main/java/cn/hutool/core/io/checksum/crc16/package-info.java b/hutool-core/src/main/java/cn/hutool/core/io/checksum/crc16/package-info.java new file mode 100644 index 000000000..dc5aaa192 --- /dev/null +++ b/hutool-core/src/main/java/cn/hutool/core/io/checksum/crc16/package-info.java @@ -0,0 +1,7 @@ +/** + * CRC16相关算法封装为Checksum + * + * @author looly + * + */ +package cn.hutool.core.io.checksum.crc16; \ No newline at end of file diff --git a/hutool-core/src/test/java/cn/hutool/core/io/checksum/CRC16Test.java b/hutool-core/src/test/java/cn/hutool/core/io/checksum/CRC16Test.java new file mode 100644 index 000000000..b2dc624b9 --- /dev/null +++ b/hutool-core/src/test/java/cn/hutool/core/io/checksum/CRC16Test.java @@ -0,0 +1,82 @@ +package cn.hutool.core.io.checksum; + +import cn.hutool.core.io.checksum.crc16.CRC16CCITT; +import cn.hutool.core.io.checksum.crc16.CRC16CCITTFalse; +import cn.hutool.core.io.checksum.crc16.CRC16DNP; +import cn.hutool.core.io.checksum.crc16.CRC16IBM; +import cn.hutool.core.io.checksum.crc16.CRC16Maxim; +import cn.hutool.core.io.checksum.crc16.CRC16Modbus; +import cn.hutool.core.io.checksum.crc16.CRC16USB; +import cn.hutool.core.io.checksum.crc16.CRC16X25; +import cn.hutool.core.io.checksum.crc16.CRC16XModem; +import cn.hutool.core.util.HexUtil; +import org.junit.Assert; +import org.junit.Test; + +public class CRC16Test { + + private final String data = "QN=20160801085857223;ST=23;CN=2011;PW=123456;MN=010000A8900016F000169DC0;Flag=5;CP=&&DataTime=20160801085857; LA-Rtd=50.1&&"; + + @Test + public void ccittTest(){ + final CRC16CCITT crc16 = new CRC16CCITT(); + crc16.update(data.getBytes()); + Assert.assertEquals("c852", HexUtil.toHex(crc16.getValue())); + } + + @Test + public void ccittFalseTest(){ + final CRC16CCITTFalse crc16 = new CRC16CCITTFalse(); + crc16.update(data.getBytes()); + Assert.assertEquals("a5e4", HexUtil.toHex(crc16.getValue())); + } + + @Test + public void xmodemTest(){ + final CRC16XModem crc16 = new CRC16XModem(); + crc16.update(data.getBytes()); + Assert.assertEquals("5a8d", HexUtil.toHex(crc16.getValue())); + } + + @Test + public void x25Test(){ + final CRC16X25 crc16 = new CRC16X25(); + crc16.update(data.getBytes()); + Assert.assertEquals("a152", HexUtil.toHex(crc16.getValue())); + } + + @Test + public void modbusTest(){ + final CRC16Modbus crc16 = new CRC16Modbus(); + crc16.update(data.getBytes()); + Assert.assertEquals("25fb", HexUtil.toHex(crc16.getValue())); + } + + @Test + public void ibmTest(){ + final CRC16IBM crc16 = new CRC16IBM(); + crc16.update(data.getBytes()); + Assert.assertEquals("18c", HexUtil.toHex(crc16.getValue())); + } + + @Test + public void maximTest(){ + final CRC16Maxim crc16 = new CRC16Maxim(); + crc16.update(data.getBytes()); + Assert.assertEquals("fe73", HexUtil.toHex(crc16.getValue())); + } + + @Test + public void usbTest(){ + final CRC16USB crc16 = new CRC16USB(); + crc16.update(data.getBytes()); + Assert.assertEquals("da04", HexUtil.toHex(crc16.getValue())); + } + + @Test + public void dnpTest(){ + final CRC16DNP crc16 = new CRC16DNP(); + crc16.update(data.getBytes()); + Assert.assertEquals("3d1a", HexUtil.toHex(crc16.getValue())); + } +}