测试java和js通信

whyclj

2019-07-24 c9f8b9e09489e547734246140b4fd3635100fbb6

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package com.fbs9100;
 
import java.nio.ByteBuffer;
import java.nio.ByteOrder;
 
public class FBS_Cmd 
{
    public final int BYTE_LEN = 10;
    
    private int SYNCode[] = {0xAA, 0xAA, 0xAA, 0xAA};
    private int ByteCount;
    public int CMD;
    public int RES_Index;
    private int CRC;
    
    public void makeCmd(int addr, int cmd, int bytecount)
    {
        ByteCount = bytecount;
        CMD = cmd;
        RES_Index = addr;
    }
    
    public boolean putByteBuffer(final ByteBuffer bf)
    {
        if(bf.limit() < BYTE_LEN)
            return false;
 
        ByteBuffer tmpbuf = bf;
        int crc0 = tmpbuf.getShort(BYTE_LEN-2) & 0xFFFF;
        int crc1 = FBS_Crc16.CalCRC16(tmpbuf, BYTE_LEN-2);
        if(crc0 != crc1)
            return false;
 
        tmpbuf.position(0);
        for(int n=0; n<4; n++)
            SYNCode[n] = FBS_ComBase.changeByteToInt(tmpbuf.get());
        
        ByteCount = FBS_ComBase.changeShortToInt(tmpbuf.getShort());
        CMD = FBS_ComBase.changeByteToInt(tmpbuf.get());
        RES_Index = FBS_ComBase.changeByteToInt(tmpbuf.get());
        CRC = FBS_ComBase.changeShortToInt(tmpbuf.getShort());
        
        tmpbuf.compact();
        tmpbuf.flip();
        
        return true;
    }
    
    public ByteBuffer getByteBuffer()
    {
        ByteBuffer bytebuffer = ByteBuffer.allocate(BYTE_LEN);
        bytebuffer.order(ByteOrder.LITTLE_ENDIAN);
 
        for(int n=0; n<4; n++)
            bytebuffer.put(FBS_ComBase.changeIntToByte(SYNCode[n]));
        
        bytebuffer.putShort(FBS_ComBase.changeIntToShort(ByteCount));
        bytebuffer.put(FBS_ComBase.changeIntToByte(CMD));
        bytebuffer.put(FBS_ComBase.changeIntToByte(RES_Index));
        
        CRC = FBS_Crc16.CalCRC16(bytebuffer, bytebuffer.position());
        bytebuffer.putShort(FBS_ComBase.changeIntToShort(CRC));
        bytebuffer.flip();
        
        return bytebuffer;
    }
}
/***************************************************************************************
******************************** end of file (FBS_Cmd) *********************************
***************************************************************************************/