5.0 Source Code
Committing 5.0 Source Code
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// uniCenta oPOS - Touch Friendly Point Of Sale
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// Copyright (c) 2009-2018 uniCenta & previous Openbravo POS works
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// https://unicenta.com
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//
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// This file is part of uniCenta oPOS
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//
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// uniCenta oPOS is free software: you can redistribute it and/or modify
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// it under the terms of the GNU General Public License as published by
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// the Free Software Foundation, either version 3 of the License, or
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// (at your option) any later version.
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//
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// uniCenta oPOS is distributed in the hope that it will be useful,
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// but WITHOUT ANY WARRANTY; without even the implied warranty of
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// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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// GNU General Public License for more details.
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//
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// You should have received a copy of the GNU General Public License
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// along with uniCenta oPOS. If not, see <http://www.gnu.org/licenses/>.
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package com.unicenta.pos.scale;
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import gnu.io.*;
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import java.io.*;
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import java.util.TooManyListenersException;
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/**
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*
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* @author JG uniCenta
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*/
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public class ScaleSamsungEsp implements Scale, SerialPortEventListener {
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private CommPortIdentifier m_PortIdPrinter;
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private SerialPort m_CommPortPrinter;
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private String m_sPortScale;
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private OutputStream m_out;
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private InputStream m_in;
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private static final int SCALE_READY = 0;
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private static final int SCALE_READING = 1;
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private static final int SCALE_READINGDECIMALS = 2;
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private double m_dWeightBuffer;
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private double m_dWeightDecimals;
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private int m_iStatusScale;
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/** Creates a new instance of ScaleComm
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* @param sPortPrinter */
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public ScaleSamsungEsp(String sPortPrinter) {
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m_sPortScale = sPortPrinter;
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m_out = null;
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m_in = null;
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m_iStatusScale = SCALE_READY;
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m_dWeightBuffer = 0.0;
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m_dWeightDecimals = 1.0;
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}
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/**
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*
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* @return
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*/
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@Override
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public Double readWeight() {
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synchronized(this) {
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if (m_iStatusScale != SCALE_READY) {
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try {
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wait(1000);
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} catch (InterruptedException e) {
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}
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if (m_iStatusScale != SCALE_READY) {
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// bascula tonta.
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m_iStatusScale = SCALE_READY;
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}
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}
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// Ya estamos en SCALE_READY
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m_dWeightBuffer = 0.0;
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m_dWeightDecimals = 1.0;
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write(new byte[] {0x24}); // $
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flush();
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// Esperamos un ratito
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try {
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wait(1000);
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} catch (InterruptedException e) {
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}
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if (m_iStatusScale == SCALE_READY) {
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// hemos recibido cositas o si no hemos recibido nada estamos a 0.0
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double dWeight = m_dWeightBuffer / m_dWeightDecimals;
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m_dWeightBuffer = 0.0;
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m_dWeightDecimals = 1.0;
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return new Double(dWeight);
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} else {
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m_iStatusScale = SCALE_READY;
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m_dWeightBuffer = 0.0;
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m_dWeightDecimals = 1.0;
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return new Double(0.0);
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}
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}
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}
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private void flush() {
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try {
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m_out.flush();
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} catch (IOException e) {
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}
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}
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private void write(byte[] data) {
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try {
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if (m_out == null) {
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m_PortIdPrinter = CommPortIdentifier.getPortIdentifier(m_sPortScale); // Tomamos el puerto
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m_CommPortPrinter = (SerialPort) m_PortIdPrinter.open("PORTID", 2000); // Abrimos el puerto
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m_out = m_CommPortPrinter.getOutputStream(); // Tomamos el chorro de escritura
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m_in = m_CommPortPrinter.getInputStream();
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m_CommPortPrinter.addEventListener(this);
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m_CommPortPrinter.notifyOnDataAvailable(true);
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m_CommPortPrinter.setSerialPortParams(4800,
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SerialPort.DATABITS_8,
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SerialPort.STOPBITS_1,
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SerialPort.PARITY_ODD); // Configuramos el puerto
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}
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m_out.write(data);
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} catch (NoSuchPortException | PortInUseException | UnsupportedCommOperationException | TooManyListenersException | IOException e) {
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}
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}
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/**
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*
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* @param e
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*/
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@Override
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public void serialEvent(SerialPortEvent e) {
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// Determine type of event.
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switch (e.getEventType()) {
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case SerialPortEvent.BI:
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case SerialPortEvent.OE:
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case SerialPortEvent.FE:
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case SerialPortEvent.PE:
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case SerialPortEvent.CD:
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case SerialPortEvent.CTS:
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case SerialPortEvent.DSR:
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case SerialPortEvent.RI:
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case SerialPortEvent.OUTPUT_BUFFER_EMPTY:
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break;
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case SerialPortEvent.DATA_AVAILABLE:
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try {
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while (m_in.available() > 0) {
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int b = m_in.read();
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if (b == 0x000D) { // CR ASCII
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// Fin de lectura
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synchronized (this) {
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m_iStatusScale = SCALE_READY;
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notifyAll();
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}
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} else if ((b > 0x002F && b < 0x003A) || b == 0x002E){
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synchronized(this) {
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if (m_iStatusScale == SCALE_READY) {
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m_dWeightBuffer = 0.0; // se supone que esto debe estar ya garantizado
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m_dWeightDecimals = 1.0;
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m_iStatusScale = SCALE_READING;
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}
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if (b == 0x002E) {
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m_iStatusScale = SCALE_READINGDECIMALS;
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} else {
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m_dWeightBuffer = m_dWeightBuffer * 10.0 + b - 0x0030;
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if (m_iStatusScale == SCALE_READINGDECIMALS) {
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m_dWeightDecimals *= 10.0;
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}
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}
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}
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} else {
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// caracteres invalidos, reseteamos.
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m_dWeightBuffer = 0.0; // se supone que esto debe estar ya garantizado
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m_dWeightDecimals = 1.0;
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m_iStatusScale = SCALE_READY;
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}
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}
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} catch (IOException eIO) {}
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break;
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}
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}
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}
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