com.github.xingshuangs.iot.protocol.modbus.model.MbReadDiscreteInputRequest Maven / Gradle / Ivy

Go to download

Show more of this group Show more artifacts with this name
Show all versions of iot-communication Show documentation

目前它只是一个物联网通信的工具，包含 1、西门子S7通信协议，支持西门子S1500，S1200，S400，S300，S200Smart，西门子机床828D; 2、Modbus通信协议，支持ModbusTcp, ModbusRtuOverTcp, ModbusAsciiOverTcp, ModbusTcpServer; 3、三菱Melsec（MC）通信协议，支持PLC iQ-R系列, Q/L系列, QnA系列, A系列, 目前只测试了L系列和FX5U; 4、RTSP, RTCP, RTP, H264, MP4 (FMP4)协议，RTSP + H264 + FMP4 + WebSocket + MSE + WEB; 5、基础字节数组解析转换工具;

The newest version!

/*
 * MIT License
 *
 * Copyright (c) 2021-2099 Oscura (xingshuang) 
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in all
 * copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
 * SOFTWARE.
 */

package com.github.xingshuangs.iot.protocol.modbus.model;


import com.github.xingshuangs.iot.protocol.modbus.enums.EMbFunctionCode;
import com.github.xingshuangs.iot.common.buff.ByteReadBuff;
import com.github.xingshuangs.iot.common.buff.ByteWriteBuff;
import lombok.Data;
import lombok.EqualsAndHashCode;

/**
 * Read discrete input request.
 * 请求读离散量输入
 *
 * @author xingshuang
 */
@EqualsAndHashCode(callSuper = true)
@Data
public final class MbReadDiscreteInputRequest extends MbPdu {

    /**
     * Address.
     * 地址 说是从0x0000 至 0xFFFF，但对应实际却只是0001-9999，对应0x0000-0x270F 

     * 字节大小：2个字节
     */
    private int address;

    /**
     * Quantity.
     * 数量，该功能码读取线圈的 1 至 2000 连续状态，1 至 2000（0x7D0）
     * 字节大小：2个字节
     */
    private int quantity;

    public MbReadDiscreteInputRequest() {
        this.functionCode = EMbFunctionCode.READ_DISCRETE_INPUT;
    }

    public MbReadDiscreteInputRequest(int address, int quantity) {
        this.functionCode = EMbFunctionCode.READ_DISCRETE_INPUT;
        this.address = address;
        this.quantity = quantity;
    }

    @Override
    public int byteArrayLength() {
        return super.byteArrayLength() + 4;
    }

    @Override
    public byte[] toByteArray() {
        return ByteWriteBuff.newInstance(this.byteArrayLength())
                .putByte(this.functionCode.getCode())
                .putShort(this.address)
                .putShort(this.quantity)
                .getData();
    }

    /**
     * Parses byte array and converts it to object.
     * (解析字节数组数据)
     *
     * @param data byte array
     * @return MbReadDiscreteInputRequest
     */
    public static MbReadDiscreteInputRequest fromBytes(final byte[] data) {
        return fromBytes(data, 0);
    }

    /**
     * Parses byte array and converts it to object.
     * (解析字节数组数据)
     *
     * @param data   byte array
     * @param offset index offset
     * @return MbReadDiscreteInputRequest
     */
    public static MbReadDiscreteInputRequest fromBytes(final byte[] data, final int offset) {
        ByteReadBuff buff = new ByteReadBuff(data, offset);
        MbReadDiscreteInputRequest res = new MbReadDiscreteInputRequest();
        res.functionCode = EMbFunctionCode.from(buff.getByte());
        res.address = buff.getUInt16();
        res.quantity = buff.getUInt16();
        return res;
    }
}