com.invertor.modbus.net.stream.OutputStreamASCII Maven / Gradle / Ivy
Go to download
Show more of this group Show more artifacts with this name
Show all versions of jlibmodbus Show documentation
Show all versions of jlibmodbus Show documentation
Implementation of the Modbus protocol in Java language
package com.invertor.modbus.net.stream;
import com.invertor.modbus.Modbus;
import com.invertor.modbus.serial.SerialPort;
import com.invertor.modbus.utils.DataUtils;
import java.io.IOException;
import java.nio.charset.Charset;
/*
* Copyright (C) 2016 "Invertor" Factory", JSC
* [http://www.sbp-invertor.ru]
*
* This file is part of JLibModbus.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*
* Authors: Vladislav Y. Kochedykov, software engineer.
* email: [email protected]
*/
public class OutputStreamASCII extends OutputStreamSerial {
private int lrc = 0;
public OutputStreamASCII(SerialPort serial) {
super(serial);
reset();
}
@Override
public void write(byte[] bytes) throws IOException {
for (byte b : bytes) {
lrc += b;
}
byte[] ascii = DataUtils.toAscii(bytes).getBytes(Charset.forName("ASCII"));
super.write(ascii);
}
@Override
public void write(int b) throws IOException {
lrc += (byte) b;
byte[] bytes = DataUtils.toAscii((byte) b).getBytes(Charset.forName("ASCII"));
super.write(bytes);
}
private void writeChecksum() throws IOException {
byte[] bytes = DataUtils.toAscii((byte) -lrc).getBytes(Charset.forName("ASCII"));
super.write(bytes);
}
public void writeRaw(int b) throws IOException {
super.write(b);
}
@Override
public void flush() throws IOException {
writeChecksum();
writeRaw(Modbus.ASCII_CODE_CR);
writeRaw(Modbus.ASCII_CODE_LF);
super.flush();
reset();
}
public void reset() {
try {
lrc = 0;
writeRaw(Modbus.ASCII_CODE_COLON);
} catch (IOException e) {
e.printStackTrace();
}
}
}