2-way to open the projector: serial port, single board

Package com; </P> <p> Import Java. io. *; <br/> Import java.net. socket; <br/> Import Java. util. *; <br/> Import javax. comm. *; </P> <p>/** <br/> * Mar 26,201 0 <br/> * @ author zcj <br/> * <br/> * in normal and VIP modes: open the projector [via serial port, through PLC] <br/> */</P> <p> public class projector {<br/> static enumeration portlist; <br/> static comatrix ortidentifier portid; <br/> static SerialPort; <br/> static outputstream o Utputstream; </P> <p>/** <br/> * use the serial port to open the projector [connecting the projector to the PC host] <br/> * @ throws exception <br/> */<br/> Public static void openprojectorbyserial (string command) {<br/> try {<br/>/* obtain the enumeration object of the comatrix ortidentifier object */<br/> portlist = comatrix ortidentifier. getportidentifiers (); </P> <p> byte [] bt = new byte [4]; <br/> BT [0] = (byte) 0x43; <br/> BT [1] = (byte) 0x30; <br/> BT [2] = (byte) 0x30; // enable projector [0x30 ], disable cast Instrument [0x31] <br/> BT [3] = (byte) 0x0d; </P> <p>/* iterate this enumeration object */<br/> while (portlist. hasmoreelements () {</P> <p>/* Get A comatrix ortidentifier object */<br/> portid = (comatrix ortidentifier) portlist. nextelement (); </P> <p> If (portid. getporttype () = comatrix ortidentifier. port_serial) {<br/> If (portid. getname (). equals ("COM1") {<br/> // open the communication <br/> SerialPort = (SerialPort) portid. open ("simplewriteapp", 2000); <br/> Seri Alport. setserialportparams (19200, SerialPort. databits_8, SerialPort. stopbits_1, SerialPort. parity_none); </P> <p> // open the output stream and write the command <br/> outputstream = SerialPort. getoutputstream (); <br/> outputstream. write (BT); <br/> outputstream. flush (); </P> <p> outputstream. close (); <br/> SerialPort. close (); <br/>}< br/>}catch (exception e) {<br/> system. out. println ("ear2projector 62 abnormal output when the projector is opened through serial port Now: "+ E. getmessage (); <br/>}finally {<br/> // close the stream and port <br/> try {<br/> If (outputstream! = NULL) {<br/> outputstream. Close (); <br/>}< br/> If (SerialPort! = NULL) {<br/> SerialPort. close (); <br/>}< br/>} catch (exception e) {<br/> system. out. println ("ear2projector 76 exception when closing the port:" + E. getmessage ()); <br/>}</P> <p>/** <br/> * Open the projector on the server. [the projector is not a PC host. connected together, it is connected to the single-host machine.] <br/> */<br/> Public static void openprojectorbyserver () {<br/> Socket socket = NULL; <br/> printwriter OS = NULL; <br/> try {<br/> socket = new socket ("remoteip", 20681); <br/> OS = ne W printwriter (socket. getoutputstream (); </P> <p> OS. write ("$00-001,50"); // open the projector <br/> // OS. write ("$00-001,51"); // disable the projector <br/> OS. flush (); </P> <p> OS. close (); // close the socket output stream <br/> socket. close (); // close socket <br/>} catch (exception e) {<br/> system. out. println ("ear2projector 106 error opening projector with Single Board:" + E. getmessage (); <br/>}finally {<br/> try {<br/> If (OS! = NULL) {<br/> OS. Close (); <br/>}< br/> If (socket! = NULL) {<br/> socket. close (); <br/>}< br/>} catch (exception e) {<br/> system. out. println ("ear2projector 117 exception when closing socket object... "+ E. getmessage (); <br/>}< br/>}