mesclient-auto/src/com/mes/util/S7Util.java

package com.mes.util;

import com.github.s7connector.api.DaveArea;
import com.github.s7connector.api.S7Connector;
import com.github.xingshuangs.iot.protocol.s7.service.S7PLC;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.math.BigInteger;
import java.text.DecimalFormat;

public class S7Util {
    public static final Logger log =  LoggerFactory.getLogger(S7Util.class);

    public static Boolean getFswAlarm(S7Connector s7Connector){
        byte[] bytes1 = s7Connector.read(DaveArea.DB, 9051, 1, 24);
        int alarm242 = getBit(bytes1[0],5);
        if(alarm242 == 1){
            return false;
        }
        int alarm243 = getBit(bytes1[0],4);
        if(alarm243 == 1){
            return false;
        }
        int alarm244 = getBit(bytes1[0],3);
        if(alarm244 == 1){
            return false;
        }
        int alarm245 = getBit(bytes1[0],2);
        if(alarm245 == 1){
            return false;
        }
        int alarm246 = getBit(bytes1[0],1);
        if(alarm246 == 1){
            return false;
        }
        int alarm247 = getBit(bytes1[0],0);
        if(alarm247 == 1){
            return false;
        }

        byte[] bytes2 = s7Connector.read(DaveArea.DB, 9051, 1, 25);
        int alarm250 = getBit(bytes2[0],7);
        if(alarm250 == 1){
            return false;
        }

        int alarm251 = getBit(bytes2[0],6);
        if(alarm251 == 1){
            return false;
        }

        int alarm252 = getBit(bytes2[0],5);
        if(alarm252 == 1){
            return false;
        }

        int alarm253 = getBit(bytes2[0],4);
        if(alarm253 == 1){
            return false;
        }

        int alarm254 = getBit(bytes2[0],3);
        if(alarm254 == 1){
            return false;
        }

        int alarm255 = getBit(bytes2[0],2);
        if(alarm255 == 1){
            return false;
        }

        int alarm256 = getBit(bytes2[0],1);
        if(alarm256 == 1){
            return false;
        }

        return true;

    }

    // 格式化s7取出的值
    public static String formatS7Val(byte[] val){
        int intValue = new BigInteger(xtob(val)).intValue();
        float floatValue = Float.intBitsToFloat(intValue);

        // 保留1位小数
        DecimalFormat df = new DecimalFormat("#.#");
        df.setMaximumFractionDigits(1);
        String result = df.format(floatValue);
        float roundedNum = Float.parseFloat(result);

        return roundedNum+"";
    }

    // 转大端排序
    private static byte[] xtob( byte[] bytes){
        return bytes;
//        // 创建新的byte数组并复制原始数据
//        byte[] reversedBytes = new byte[bytes.length];
//        System.arraycopy(bytes, 0, reversedBytes, 0, bytes.length);
//
//        // 反转byte数组元素的位置
//        for (int i = 0; i < bytes.length / 2; i++) {
//            byte temp = reversedBytes[i];
//            reversedBytes[i] = reversedBytes[reversedBytes.length - 1 - i];
//            reversedBytes[reversedBytes.length - 1 - i] = temp;
//        }
//        return reversedBytes;
    }

    private static String byteToBinaryString(byte[] byteArray) {
        StringBuilder binaryString = new StringBuilder();
        for (byte b : byteArray) {
            binaryString.append(String.format("%8s", Integer.toBinaryString(b & 0xFF)).replace(' ', '0'));
        }
        return binaryString.toString();
    }

    public static int getBit(byte b, int n) {
        // 将byte转换为二进制字符串
        String binaryString = Integer.toBinaryString(b & 0xFF);
        // 补足位数到8位
        binaryString = String.format("%8s", binaryString).replace(' ', '0');
        // 获取第n位的字符，然后转换为整数
        return binaryString.charAt(n) == '1' ? 1 : 0;
    }

    public static Integer formatS7Int(byte[] val){
        return new BigInteger(xtob(val)).intValue();
    }

}