java与modbusRtu(COM口)通讯

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modbous协议通讯byte数据解析含义

依赖的modbus包请看java与modbusTcp通讯
JDK中配置串口通讯能力提取码：hmfn
串口模拟工具提取码： npqx
依赖串口协议包：
<dependency><groupId>org.rxtx</groupId><artifactId>rxtx</artifactId><version>2.1.7</version>
</dependency>

实现代码 1 抽象类

import com.serotonin.modbus4j.serial.SerialPortWrapper;
import gnu.io.SerialPort;import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;public abstract class AbstractSerialPortWrapper implements SerialPortWrapper {private SerialPort serialPort = null;private Integer baudRate;private String port;protected AbstractSerialPortWrapper(String port,Integer baudRate){this.port = port;this.baudRate = baudRate;}@Overridepublic void close() throws Exception {if(serialPort != null){serialPort.close();}}@Overridepublic void open() throws Exception {serialPort = serialPort(port);}@Overridepublic InputStream getInputStream() {try {if(serialPort != null){return serialPort.getInputStream();}} catch (IOException e) {throw new RuntimeException("对象空指针异常");}throw new RuntimeException("对象空指针异常");}@Overridepublic OutputStream getOutputStream() {try {if(serialPort != null){return serialPort.getOutputStream();}} catch (IOException e) {throw new RuntimeException("对象空指针异常");}throw new RuntimeException("对象空指针异常");}@Overridepublic int getBaudRate() {return baudRate;}@Overridepublic int getFlowControlIn() {return SerialPort.FLOWCONTROL_NONE;}@Overridepublic int getFlowControlOut() {return SerialPort.FLOWCONTROL_NONE;}@Overridepublic int getDataBits() {return SerialPort.DATABITS_8;}@Overridepublic int getStopBits() {return SerialPort.STOPBITS_1;}@Overridepublic int getParity() {return SerialPort.PARITY_EVEN;}public abstract SerialPort serialPort(String portName);
}

实现代码 2 支持类

import java.util.ArrayList;
import java.util.Enumeration;
import java.util.List;public class SerialPortSupport extends AbstractSerialPortWrapper {public SerialPortSupport(String port,Integer baudRate){super(port,baudRate);}/*** 查找所有可用端口** @return 可用端口名称列表*/@SuppressWarnings("all")public static List<String> findPorts() {// 获得当前所有可用串口Enumeration<CommPortIdentifier> portList = CommPortIdentifier.getPortIdentifiers();List<String> portNameList = new ArrayList<String>();// 将可用串口名添加到List并返回该Listwhile (portList.hasMoreElements()) {String portName = portList.nextElement().getName();portNameList.add(portName);}return portNameList;}@Overridepublic SerialPort serialPort(String portName) {try {// 通过端口名识别端口CommPortIdentifier portIdentifier = CommPortIdentifier.getPortIdentifier(portName);// 打开端口，并给端口名字和一个timeout（打开操作的超时时间）CommPort commPort = portIdentifier.open(portName, 2000);// 判断是不是串口if (commPort instanceof SerialPort) {SerialPort serialPort = (SerialPort) commPort;try {// 设置一下串口的波特率等参数 // 数据位：8 // 停止位：1 // 校验位：NoneserialPort.setSerialPortParams(getBaudRate(), getDataBits(), getStopBits(), getParity());} catch (UnsupportedCommOperationException e) {throw new RuntimeException("打开串口异常");}return serialPort;}} catch (Exception e1) {throw new RuntimeException("打开串口异常");}return null;}
}

实现代码 3 通讯类

import com.serotonin.modbus4j.ModbusFactory;
import com.serotonin.modbus4j.ModbusMaster;
import com.serotonin.modbus4j.exception.ModbusInitException;
import com.serotonin.modbus4j.exception.ModbusTransportException;
import com.serotonin.modbus4j.msg.*;
import com.serotonin.modbus4j.serial.SerialPortWrapper;
import com.sotring.asd.modbus.suport.SerialPortSupport;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;import java.util.Arrays;public class RtuMasterWrapper {private static final Logger log = LoggerFactory.getLogger(RtuMasterWrapper.class);private int slaveId;private ModbusMaster rutMaster;private boolean connected;public RtuMasterWrapper(int slaveId) {this.slaveId = slaveId;log.info("slaveId: {}",  slaveId);}public boolean connect() {disconnect();try {SerialPortWrapper port = new SerialPortSupport("COM1",9600);rutMaster = new ModbusFactory().createRtuMaster(port);rutMaster.setTimeout(3000);rutMaster.init();connected = true;} catch (ModbusInitException ex) {log.error("connect error, try to disconnect...", ex);disconnect();}return isConnected();}private void disconnect() {if (rutMaster != null) {rutMaster.destroy();}connected = false;log.info("disconnect");}private boolean isConnected() {return connected;}/*** 读取单个线圈（01功能码）* @param startOffset 读取地址*/public Boolean readCoils(int startOffset) throws ModbusTransportException {ReadCoilsRequest request = new ReadCoilsRequest(slaveId,startOffset,1);ReadCoilsResponse response = (ReadCoilsResponse) rutMaster.send(request);if (response!= null && response.isException()) {throw new ModbusTransportException(response.getExceptionMessage());} else if(response!= null){return response.getBooleanData()[0];}connected = false;return null;}/*** 写入单个地址* @param startOffset 写入地址* @param value 写入值*/public void writeCoils(int startOffset,boolean value) throws ModbusTransportException {WriteCoilRequest request = new WriteCoilRequest(slaveId,startOffset,value);WriteCoilResponse response = (WriteCoilResponse) rutMaster.send(request);if (response!= null && response.isException()) {throw new ModbusTransportException(response.getExceptionMessage());}}/*** 写多个线圈（01功能码）* @param startOffset 写入开始地址* @param value 写入值集合* @throws ModbusTransportException*/public void writeCoilsMultiple(int startOffset,boolean[] value) throws ModbusTransportException {WriteCoilsRequest request = new WriteCoilsRequest(slaveId,startOffset,value);WriteCoilsResponse response = (WriteCoilsResponse) rutMaster.send(request);if (response!= null && response.isException()) {throw new ModbusTransportException(response.getExceptionMessage());}}/*** 读取单个离散线圈（02功能码）* @param startOffset 读取地址*/public Boolean readDiscrete(int startOffset) throws ModbusTransportException {ReadDiscreteInputsRequest request = new ReadDiscreteInputsRequest(slaveId,startOffset,1);ReadDiscreteInputsResponse response = (ReadDiscreteInputsResponse) rutMaster.send(request);if (response!= null && response.isException()) {throw new ModbusTransportException(response.getExceptionMessage());} else if(response!= null){return response.getBooleanData()[0];}connected = false;return null;}/*** 读取单个保持寄存器（03功能码）* @param startOffset 读取地址*/public Short readHoldingRegisterValue(int startOffset) throws ModbusTransportException {ReadHoldingRegistersRequest request = new ReadHoldingRegistersRequest(slaveId, startOffset, 1);log.info("Reading Holding Register, startAddress: {}", startOffset);ReadHoldingRegistersResponse response = (ReadHoldingRegistersResponse)rutMaster.send(request);if (response != null && response.isException()) {log.error("Modbus execution failed: \nslaveId: {}, startAddress: {}", slaveId, startOffset);return null;} else if (response != null && response.getShortData().length > 0) {return response.getShortData()[0];}connected = false;return null;}/*** 读取多个保持寄存器（03功能码）* @param startOffset 开始读取位置* @param numberOfRegisters 读取个数*/public short[] readHoldingRegisterValues(int startOffset, int numberOfRegisters) throws ModbusTransportException {ReadHoldingRegistersRequest request = new ReadHoldingRegistersRequest(slaveId, startOffset, numberOfRegisters);log.info("Reading Holding Registers, startAddress: {}, len: {}", startOffset, numberOfRegisters);ReadHoldingRegistersResponse response = (ReadHoldingRegistersResponse)rutMaster.send(request);if (response != null && response.isException()) {log.error("Modbus execution failed: \nslaveId: {}, startAddress: {}, len: {}", slaveId, startOffset, numberOfRegisters);return null;} else if (response != null) {return response.getShortData();}connected = false;return null;}/*** 写入保持寄存器多个值（03功能码）* @param startOffset 写入开始地址* @param values 写入多个数据集合*/public void writeRegisterValues(int startOffset, short[] values) throws ModbusTransportException {WriteRegistersRequest request = new WriteRegistersRequest(slaveId, startOffset, values);log.info(String.format("WRITE Holding Register, startOffset: %d, values: %s",startOffset, Arrays.toString(values)));WriteRegistersResponse response = (WriteRegistersResponse) rutMaster.send(request);if (response!= null && response.isException()) {throw new ModbusTransportException(response.getExceptionMessage());}}/*** 写入保持寄存器（03功能码）* @param startOffset 写入地址* @param value 写入值*/public void writeRegisterValue(int startOffset, short value) throws ModbusTransportException {WriteRegistersRequest request = new WriteRegistersRequest(slaveId, startOffset, new short[]{value});log.info(String.format("Writing Holding Register, startAddress: %d, value: %d", startOffset, value));WriteRegistersResponse response = (WriteRegistersResponse) rutMaster.send(request);if (response!= null && response.isException()) {throw new ModbusTransportException(response.getExceptionMessage());}}/*** 读取输入寄存器（04功能码）* @param startOffset 读取地址*/public Short readInput(int startOffset) throws ModbusTransportException {ReadInputRegistersRequest request = new ReadInputRegistersRequest(slaveId,startOffset,1);ReadInputRegistersResponse response = (ReadInputRegistersResponse) rutMaster.send(request);if (response!= null && response.isException()) {throw new ModbusTransportException(response.getExceptionMessage());} else if(response!= null){return response.getShortData()[0];}connected = false;return null;}
}

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