/*
 * filename: rs485.java
 * by Sonny Cruz
 *
 */

import javax.comm.*;
import java.io.*;

public class rs485 implements Constant {

    static InputStream in = null;
    static OutputStream out = null;
    static SerialPort sp = null;

    private static rs485 instance = new rs485();

    public static rs485 getInstance() { return instance; }

    private rs485() {
	try {
	    com.dalsemi.system.TINIOS.enableSerialPort1();
            CommPortIdentifier portID = CommPortIdentifier.getPortIdentifier("serial1");
            sp = (SerialPort)portID.open("tini", 5000);
            sp.setSerialPortParams(9600, SerialPort.DATABITS_8, SerialPort.STOPBITS_1,
                                   SerialPort.PARITY_NONE);
            sp.setFlowControlMode(SerialPort. FLOWCONTROL_NONE);
            out = sp.getOutputStream();
            in = sp.getInputStream();
        }
        catch (IOException ioe) {}
        catch (NoSuchPortException nspe) {}
        catch (UnsupportedCommOperationException ucoe) {}
        catch (PortInUseException piue) {}
    }

    public int readData() {
	int data;
        data = 0;
        try {
           data = in.read();
        }
        catch (IOException ioe) {}
        return data;
    }

    public void sendData(int b) {
        try {
	   out.write((byte)b);
        } catch (IOException ioe) {}
    }

    public void requestSensorStatus() {
       try {
          out.write(SYNCH);                     // synch
          out.write(HEADER);                    // header
          out.write(DUMMY_BYTE);                // address
          out.write(SENSOR_STATUS);             // command
          out.write(DUMMY_BYTE);                // data
          out.write(DUMMY_BYTE);                // data
          out.write(DUMMY_BYTE);                // data
          out.write(TRAILER);                   // trailer
       } catch (IOException ioe) {}
    }

    public void sendX10(int choice) {
       try {
          out.write(SYNCH);
          out.write(HEADER);                            // header
          out.write(DUMMY_BYTE);                        // address
          out.write(X_10);                              // command
          out.write(HOUSE_CODE);                        // data field

          switch (choice) {
             case 2  : out.write(A2_ON);    break;
             case 20 : out.write(A2_OFF);   break;
             case 3  : out.write(A3_ON);    break;
             case 30 : out.write(A3_OFF);   break;
             case 4  : out.write(A4_ON);    break;
             case 40 : out.write(A4_OFF);   break;
             case 5  : out.write(A5_ON);    break;
             case 50 : out.write(A5_OFF);   break;
             case 6  : out.write(A6_ON);    break;
             case 60 : out.write(A6_OFF);   break;
             case 7  : out.write(A7_ON);    break;
             case 70 : out.write(A7_OFF);   break;
             default: break;
          }

       out.write(DUMMY_BYTE);                           // data field
       out.write(TRAILER);
       } catch (IOException ioe) {}
    }

}