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