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• PNY ExpressCard SATA II 2-port card - drivers?

  - by stewartwb

  I bought a couple of PNY eSATA cards for notebook computers, model P-NSA2-EC-RF. I mistakenly thought that they would be a bit more plug-and-play, like cards that supply USB or Firewire ports. They did not ship with the Driver CD, and the drivers I found on the PNY web site didn't work. I've emailed their support group, but we all know how likely it is that they will respond before the end of the decade. Does anyone have a driver disc handy for this model card, or know where I might download a driver ISO? (Dell XPS M1330 laptop running Windows 7 x64 and sometimes Windows 7 x86)

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• Tunneling through SSH for 1521 port access?

  - by A T

  I am developing locally on my computer, using my own Apache server with PHP configured. My database however is remotely located on an Oracle 11g Database Server. We were also given a separate remote server for hosting our .html and .php files, however only FTP access has been provided there. Development is far too slow waiting for the FTP connection to push. So I decided to develop locally, but still use the remote DB server. Unfortunately that gives me an error. Not sure how—or where—to integrate tunnelling. Do I add something to the oci_connect HOST in my PHP file, or do I encapsulate my whole environment over SSH?

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• GeForce GT 430 with 1 VGA port and 1 HDMI port can support dual monitor?

  - by Tendou Kishi

  This question is similar to 3 Monitors, 1 graphics card but with different video card. It has the same ports as GT 120 in that question. Would it support dual monitor? I don't need 3 monitors. Just 2 is good. Checked GeForce GT 430 Specs but have no idea whether it will support or not. While on it, can somebody explain how to know whether a graphics card support multiple display from such information?

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• DELL U2410 Monitor(Display Port) & Graphic card

  - by Anj

  I was looking for a 24" monitor and bought the Dell 24" inch ultra sharp monitor which has DisplayPort( new keyword for me) seems it is equivalent to HDMI. Now I would like to enhance the display capabilities for my laptop and desktop(both have VGA output as of now). Couple of questions in mind: Is there a single HD graphic card which i could use for both desktop and laptop? I understand it has to be external but if its costly then I would stick on internal graphic card for my desktop. Please recommend external if its cost effective else I would go for internal one(Budget is around $70 or Rs 4000. Is there a HD card which I could use for both HD video and 5.1 channel audio output? I generally use the computer for office work/ listening music and watching movies, not gaming.

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• 100 TIME_WAIT Connections to 1433 (sqlserver) port from one remote IP

  - by dynback.com

  What to do? Block that IP in firewall? What is this?

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• How do I connect my Samsung 6 Series TV to network through a proxy?

  - by JGC

  I have a Samsung 6 series LCD TV which can connect to internet by LAN. When I connect my TV to my Windows 7 laptop which get its internet from AS share it, it can connect to the Internet. My TV can connect to YouTube, but in my country this site is filtered. I want to use an antifilter(proxy) program to bypass the filtering. The problem is the TV does not recognize the proxy port or program. How can I configure the TV or the network to use the proxy?

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• cant access my local web server with the external IP

  - by TommyG

  I havent been able to find a solution to my particular problem. I have a MAC which I set up as a web server and configured my router to forward to the local IP. When trying to access my site from outside, it does say "It works!", however, when I call a simple Hello World PHP script that I have, I am getting an error that the page could not be opened. I did enable PHP on my machine so thats not the problem. I really have no idea how can I access - I followed so many tutorials and did everything correctly. My router is a Linksys WRT160N if it matters at all. In the port forwarding section, I selected to forward

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• Binary data from a serial port in linux using c

  - by user1680393

  I am reading binary data from a serial port on Phidget sbc using Linux to get a command from an application running on a PC. I wrote a test program in VB to read the data into a byte array and convert it to decimal to use it but can’t figure out how to do it in c. I am unable to come up with anything with the research I have done on the internet. Command sent from PC is 0x0F. To check if I am getting correct data I read the data and send it back. Here is what I get back. Returned data has a carriage return added to it. Hex Display 0F00 0000 0D ‘\’ Display \0F\00\00\00\r Normal display just display a strange character. This tells me that the data is there that I can use, but can’t figure out to extract the value 0F or 15. How can I convert the incoming data to use it? I tried converting the received data using strtol, but it returns 0. I also tried setting the port to raw but it did not make any difference. unsigned char buffer1[1]; int ReadPort1() { int result; result = read(file1, &buffer1,1); if(result > 0) { WritePort1(buffer1); sprintf(tempstr, "Port1 data %s %d", buffer1, result); DisplayText(2,tempstr); } return result; } Port Open/Setup void OpenPort1() { //file1 = open("/dev/ttyUSB1", O_RDWR | O_NOCTTY | O_NONBLOCK); file1 = open("/dev/ttyUSB1", O_RDWR | O_NOCTTY | O_NODELAY); if(file1 < 0) printf("Error opening serial port1.\n"); else { SetPort(file1, 115200, 8, 1, 0, 1); port1open = 1; } } void SetPort(int fd, int Baud_Rate, int Data_Bits, int Stop_Bits, int Parity, int raw) { long BAUD; // derived baud rate from command line long DATABITS; long STOPBITS; long PARITYON; long PARITY; struct termios newtio; switch (Baud_Rate) { case 115200: BAUD = B115200; break; case 38400: BAUD = B38400; break; case 19200: BAUD = B19200; break; case 9600: BAUD = B9600; break; } //end of switch baud_rate switch (Data_Bits) { case 8: default: DATABITS = CS8; break; case 7: DATABITS = CS7; break; case 6: DATABITS = CS6; break; case 5: DATABITS = CS5; break; } //end of switch data_bits switch (Stop_Bits) { case 1: default: STOPBITS = 0; break; case 2: STOPBITS = CSTOPB; break; } //end of switch stop bits switch (Parity) { case 0: default: //none PARITYON = 0; PARITY = 0; break; case 1: //odd PARITYON = PARENB; PARITY = PARODD; break; case 2: //even PARITYON = PARENB; PARITY = 0; break; } //end of switch parity newtio.c_cflag = BAUD | DATABITS | STOPBITS | PARITYON | PARITY | CLOCAL | CREAD; newtio.c_iflag = IGNPAR; if(raw == 1) { newtio.c_oflag &= ~OPOST; newtio.c_lflag &= ~(ICANON | ECHO | ECHOE | ISIG); } else { newtio.c_lflag = 0; //ICANON; newtio.c_oflag = 0; } newtio.c_cc[VMIN]=1; newtio.c_cc[VTIME]=0; tcflush(fd, TCIFLUSH); tcsetattr(fd,TCSANOW,&newtio); }

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• Configure USB GSM Modem

  - by adisembiring

  I want to configure EVDO Usb Modem in Ubuntu 10.10 I insert my usb modem to laptop and check the usb is detected or not using $sudo lsusb and the result is: Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub Bus 005 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub Bus 002 Device 002: ID 201e:2009 Bus 002 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub Bus 004 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub Bus 001 Device 003: ID 14cd:6600 Super Top USB 2.0 IDE DEVICE Bus 002 Device 002: ID 201e:2009 is my us device. and than I execute command $dmesg | grep -e tty [ 0.000000] console [tty0] enabled [ 818.054660] usb 2-1.3: GSM modem (1-port) converter now attached to ttyUSB0 [ 818.055125] usb 2-1.3: GSM modem (1-port) converter now attached to ttyUSB1 [ 818.055647] usb 2-1.3: GSM modem (1-port) converter now attached to ttyUSB2 [ 818.330641] option1 ttyUSB0: GSM modem (1-port) converter now disconnected from ttyUSB0 [ 818.330743] option1 ttyUSB1: GSM modem (1-port) converter now disconnected from ttyUSB1 [ 818.330840] option1 ttyUSB2: GSM modem (1-port) converter now disconnected from ttyUSB2 [ 1054.917473] usb 2-1.2: GSM modem (1-port) converter now attached to ttyUSB0 [ 1054.917995] usb 2-1.2: GSM modem (1-port) converter now attached to ttyUSB1 [ 1054.918481] usb 2-1.2: GSM modem (1-port) converter now attached to ttyUSB2 [ 1055.214087] option1 ttyUSB0: GSM modem (1-port) converter now disconnected from ttyUSB0 [ 1055.214221] option1 ttyUSB1: GSM modem (1-port) converter now disconnected from ttyUSB1 [ 1055.214356] option1 ttyUSB2: GSM modem (1-port) converter now disconnected from ttyUSB2 Why converter disconnected from ttyUSB2 ? and than I try to execute command $sudo wvdialconf sorry, no modem was detected! Is it in use by another program ? did you configure it properly with setserials ? I change the same type usb modem from my friend, but I still get error above.

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• Configure EVDO USB Modem in Ubuntu 10.10

  - by adisembiring

  I want to configure EVDO Usb Modem in Ubuntu 10.10 I insert my usb modem to laptop and check the usb is detected or not using $sudo lsusb and the result is: Bus 003 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub Bus 005 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub Bus 002 Device 002: ID 201e:2009 Bus 002 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub Bus 004 Device 001: ID 1d6b:0001 Linux Foundation 1.1 root hub Bus 001 Device 003: ID 14cd:6600 Super Top USB 2.0 IDE DEVICE Bus 002 Device 002: ID 201e:2009 is my us device. and than I execute command $dmesg | grep -e tty [ 0.000000] console [tty0] enabled [ 818.054660] usb 2-1.3: GSM modem (1-port) converter now attached to ttyUSB0 [ 818.055125] usb 2-1.3: GSM modem (1-port) converter now attached to ttyUSB1 [ 818.055647] usb 2-1.3: GSM modem (1-port) converter now attached to ttyUSB2 [ 818.330641] option1 ttyUSB0: GSM modem (1-port) converter now disconnected from ttyUSB0 [ 818.330743] option1 ttyUSB1: GSM modem (1-port) converter now disconnected from ttyUSB1 [ 818.330840] option1 ttyUSB2: GSM modem (1-port) converter now disconnected from ttyUSB2 [ 1054.917473] usb 2-1.2: GSM modem (1-port) converter now attached to ttyUSB0 [ 1054.917995] usb 2-1.2: GSM modem (1-port) converter now attached to ttyUSB1 [ 1054.918481] usb 2-1.2: GSM modem (1-port) converter now attached to ttyUSB2 [ 1055.214087] option1 ttyUSB0: GSM modem (1-port) converter now disconnected from ttyUSB0 [ 1055.214221] option1 ttyUSB1: GSM modem (1-port) converter now disconnected from ttyUSB1 [ 1055.214356] option1 ttyUSB2: GSM modem (1-port) converter now disconnected from ttyUSB2 Why converter disconnected from ttyUSB2 ? and than I try to execute command $sudo wvdialconf sorry, no modem was detected! Is it in use by another program ? did you configure it properly with setserials ? I change the same type usb modem from my friend, but I still get error above.

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• Apache virtual hosts - Resources on website not loaded when accessed from other hostname than localhost

  - by Christian Stadegaart

  Running virtual hosts on Mac OS X 10.6.8 running Apache 2.2.22. /etc/hosts is as follows: 127.0.0.1 localhost 3dweergave studio-12.fritz.box 255.255.255.255 broadcasthost ::1 localhost fe80::1%lo0 localhost Virtual hosts configuration: NameVirtualHost *:80 <VirtualHost *:80> DocumentRoot "/opt/local/www/3dweergave" ServerName 3dweergave ErrorLog "logs/3dweergave-error_log" CustomLog "logs/3dweergave-access_log" common <Directory "/opt/local/www/3dweergave"> Options Indexes FollowSymLinks AllowOverride All Order allow,deny Allow from all </Directory> </VirtualHost> <VirtualHost *:80> ServerName main </VirtualHost> This will output the following settings: *:80 is a NameVirtualHost default server 3dweergave (/opt/local/apache2/conf/extra/httpd-vhosts.conf:21) port 80 namevhost 3dweergave (/opt/local/apache2/conf/extra/httpd-vhosts.conf:21) port 80 namevhost main (/opt/local/apache2/conf/extra/httpd-vhosts.conf:34) I made 3dweergave the default server by putting it first in the list. This will cause all undefined virtual hosts' names to load 3dweergave, and thus http://localhost will point to 3dweergave. Of course, normally, the first in the list is the virtual host main and localhost will point to main, but for testing purposes I switched them. When I navigate to http://localhost, my CakePHP default homepage shows as expected: Screenshot 1 But when I navigate to http://3dweergave, my CakePHP default homepage doesn't show as expected. It looks like every relative link to resources are not accepted by the server: Screenshot 2 For example, the CSS isn't loaded. When I open the source and click on the link, it opens the CSS file in the browser without errors. But when I run FireBug while loading the webpage, it seems that the CSS file isn't retrieved. (<link rel="stylesheet" type="text/css" href="/css/cake.generic.css" />) How can I fix this unwanted behaviour?

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• Advice on logic circuits and serial communications

  - by Spencer Ruport

  As far as I understand the serial port so far, transferring data is done over pin 3. As shown here: There are two things that make me uncomfortable about this. The first is that it seems to imply that the two connected devices agree on a signal speed and the second is that even if they are configured to run at the same speed you run into possible synchronization issues... right? Such things can be handled I suppose but it seems like there must be a simpler method. What seems like a better approach to me would be to have one of the serial port pins send a pulse that indicates that the next bit is ready to be stored. So if we're hooking these pins up to a shift register we basically have: (some pulse pin)-clk, tx-d Is this a common practice? Is there some reason not to do this? EDIT Mike shouldn't have deleted his answer. This I2C (2 pin serial) approach seems fairly close to what I did. The serial port doesn't have a clock you're right nobugz but that's basically what I've done. See here: private void SendBytes(byte[] data) { int baudRate = 0; int byteToSend = 0; int bitToSend = 0; byte bitmask = 0; byte[] trigger = new byte[1]; trigger[0] = 0; SerialPort p; try { p = new SerialPort(cmbPorts.Text); } catch { return; } if (!int.TryParse(txtBaudRate.Text, out baudRate)) return; if (baudRate < 100) return; p.BaudRate = baudRate; for (int index = 0; index < data.Length * 8; index++) { byteToSend = (int)(index / 8); bitToSend = index - (byteToSend * 8); bitmask = (byte)System.Math.Pow(2, bitToSend); p.Open(); p.Parity = Parity.Space; p.RtsEnable = (byte)(data[byteToSend] & bitmask) > 0; s = p.BaseStream; s.WriteByte(trigger[0]); p.Close(); } } Before anyone tells me how ugly this is or how I'm destroying my transfer speeds my quick answer is I don't care about that. My point is this seems much much simpler than the method you described in your answer nobugz. And it wouldn't be as ugly if the .Net SerialPort class gave me more control over the pin signals. Are there other serial port APIs that do?

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• usb device identification

  - by omrihsan

  hello all i am using python on ubuntu 9.04 say i have two usb devices connected to a single PC. how can i identify the devices in python code.....for example like if usb port id == A write data to device 1 if usb port id == B write data to device 2 any ideas....

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• Ruby SerialPorts

  - by Seth Archer

  I'm using the ruby serial port gem. After I open up the port I send the data I want like this. sp.write [200.chr, 30.chr, 7.chr, 5.chr, 1.chr, 2.chr, 0.chr, 245.chr].to_s It doesn't work, but if I put it in a loop of around 200 times: 200.times do sp.write [200.chr, 30.chr, 7.chr, 5.chr, 1.chr, 2.chr, 0.chr, 245.chr].to_s end It works. Any ideas on why this is happening?

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• Filezilla won't connect to my server!

  - by Reece

  Hey guys! I'm awful with computers! I'm trying to use Filezilla to connect to my server. When I do this, this is the message it give me verbatim: Protocol error: Unknown protocol identifier (0x50 0x50 0x48). Most likely connected to the wrong port. Connection to server closed. but it's not the wrong port!... what am I doing wrong?

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• Sending an integer to COM1 using SerialPort

  - by Galwegian

  I'm having difficulty sending an integer to a serial port... I'm trying stuff like this, which run fine but I'm not picking anything up at the port. Private Sub fireToPort() Dim sPort As New SerialPort("COM1", 56000, Parity.None, 8, StopBits.One) sPort.Open() sPort.Write(New Byte() {Hex(1), 255}, 0, 0) sPort.Close() End Sub Any advice?

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• access DLLs with java script

  - by Caio Garcia

  I need to read the serial port as an input for a web based applicaton. I know that the browser can't do it, but if I build an DLL and send it to my client, can I access this DLL and read de serial port with an java script or i will need something like ActiveX?

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• MacPorts - Installing Port, Dependencies Failed

  - by Louis

  I am attempting to install xulrunner on OSX 10.6.3 using the following: sudo port install xulrunner However, I am receiving the following error: nat-10-200-136-126:phoneyc-new $ sudo port install xulrunner ---> Computing dependencies for xulrunner ---> Activating zlib @1.2.5_0 Error: The following dependencies failed to build: gconf dbus-glib glib2 zlib gtk-doc docbook-xml docbook-xml-4.1.2 xmlcatmgr docbook-xml-4.2 docbook-xml-4.3 docbook-xml-4.4 docbook-xml-4.5 docbook-xml-5.0 docbook-xsl gnome-doc-utils iso-codes libxslt libxml2 p5-xml-parser py26-libxml2 python26 bzip2 db46 gdbm openssl readline sqlite3 tk Xft2 fontconfig freetype xrender xorg-libX11 xorg-bigreqsproto xorg-inputproto xorg-kbproto xorg-libXau xorg-xproto xorg-libXdmcp xorg-util-macros xorg-xcmiscproto xorg-xextproto xorg-xf86bigfontproto xorg-xtrans xorg-renderproto tcl xorg-libXScrnSaver xorg-libXext xorg-scrnsaverproto rarian getopt intltool gnome-common p5-getopt-long p5-pathtools p5-scalar-list-utils gtk2 atk cairo libpixman libpng jasper jpeg pango shared-mime-info tiff xorg-libXcomposite xorg-compositeproto xorg-libXfixes xorg-fixesproto xorg-libXcursor xorg-libXdamage xorg-damageproto xorg-libXi xorg-libXinerama xorg-xineramaproto xorg-libXrandr xorg-randrproto orbit2 libidl policykit heimdal lcms libcanberra gstreamer bison flex gzip texinfo lzmautils libvorbis libogg libnotify nss xorg-libXt xorg-libsm xorg-libice Error: Status 1 encountered during processing. Before reporting a bug, first run the command again with the -d flag to get complete output. nat-10-200-136-126:phoneyc-new$ I am unsure how to correct this issue, so any help would be much appreciated!

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• git push heroku master gives error ssh: connect to host heroku.com port 22: Connection refused

  - by user1476508

  I'm trying to run the heroku-django tutorial (using ubuntu 12.04) and it seems for some reason i cant push into heroku. here is what happens: yeinhorn@ubuntu:~/hellodjango$ git init Reinitialized existing Git repository in /home/yeinhorn/hellodjango/.git/ yeinhorn@ubuntu:~/hellodjango$ git add . yeinhorn@ubuntu:~/hellodjango$ git commit -m "my first commit" On branch master nothing to commit (working directory clean) yeinhorn@ubuntu:~/hellodjango$ heroku create Creating high-dusk-6308... done, stack is cedar http://high-dusk-6308.herokuapp.com/ | [email protected]:high-dusk-6308.git ! New default stack: Cedar. To use Bamboo, run heroku create -s bamboo. yeinhorn@ubuntu:~/hellodjango$ git remote -v heroku [email protected]:blazing-dusk-8587.git (fetch) heroku [email protected]:blazing-dusk-8587.git (push) yeinhorn@ubuntu:~/hellodjango$ git push heroku master ssh: connect to host heroku.com port 22: Connection refused fatal: The remote end hung up unexpectedly yeinhorn@ubuntu:~/hellodjango$ git push -f heroku ssh: connect to host heroku.com port 22: Connection refused fatal: The remote end hung up unexpectedly also when i run $telnet heroku.com 22 i get Trying 50.19.85.132... Trying 50.19.85.154... Trying 50.19.85.156... telnet: Unable to connect to remote host: Connection refused any ideas?

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• "jpeglib.h: No such file or directory" ghostscript port in OPENBSD

  - by holms

  Hello I have a problem with compiling a ghostscript from ports in openbsd 4.7. SO i have jpeg-7 installed, I have latest port tree for obsd4.7. ===> Building for ghostscript-8.63p11 mkdir -p /usr/ports/pobj/ghostscript-8.63p11/ghostscript-8.63/obj gmake LDFLAGS='-L/usr/local/lib -shared' GS_XE=./obj/../obj/libgs.so.11.0 STDIO_IMPLEMENTATION=c DISPLAY_DEV=./obj/../obj/display.dev BINDIR=./obj/../obj GLGENDIR=./obj/../obj GLOBJDIR=./obj/../obj PSGENDIR=./obj/../obj PSOBJDIR=./obj/../obj CFLAGS='-O2 -fno-reorder-blocks -fno-reorder-functions -fomit-frame-pointer -march=i386 -fPIC -Wall -Wstrict-prototypes -Wmissing-declarations -Wmissing-prototypes -fno-builtin -fno-common -DGS_DEVS_SHARED -DGS_DEVS_SHARED_DIR=\"/usr/local/lib/ghostscript/8.63\"' prefix=/usr/local ./obj/../obj/gsc gmake[1]: Entering directory `/usr/ports/pobj/ghostscript-8.63p11/ghostscript-8.63' cc -I./obj/../obj -I./src -DHAVE_MKSTEMP -O2 -fno-reorder-blocks -fno-reorder-functions -fomit-frame-pointer -march=i386 -fPIC -Wall -Wstrict-prototypes -Wmissing-declarations -Wmissing-prototypes -fno-builtin -fno-common -DGS_DEVS_SHARED -DGS_DEVS_SHARED_DIR=\"/usr/local/lib/ghostscript/8.63\" -DGX_COLOR_INDEX_TYPE='unsigned long long' -o ./obj/../obj/sdctc.o -c ./src/sdctc.c In file included from src/sdctc.c:17: obj/jpeglib_.h:1:21: jpeglib.h: No such file or directory In file included from src/sdctc.c:19: src/sdct.h:58: error: field `err' has incomplete type src/sdct.h:70: error: field `err' has incomplete type src/sdct.h:72: error: field `cinfo' has incomplete type src/sdct.h:73: error: field `destination' has incomplete type src/sdct.h:84: error: field `err' has incomplete type src/sdct.h:87: error: field `dinfo' has incomplete type src/sdct.h:88: error: field `source' has incomplete type gmake[1]: *** [obj/../obj/sdctc.o] Error 1 gmake[1]: Leaving directory `/usr/ports/pobj/ghostscript-8.63p11/ghostscript-8.63' gmake: *** [so] Error 2 *** Error code 2 Stop in /usr/ports/print/ghostscript/gnu (line 2225 of /usr/ports/infrastructure/mk/bsd.port.mk). I tried to place one more param in CFLAGS in Makefile with value "-I/usr/local" but no luck =( People in irc [freenode server, #openbsd channel] refuses give any help for ports at all, and even more - because this is 4.7 unstable version. I have my reasons to use this version and ports believe me =) CFLAGS+= -DSYS_TYPES_HAS_STDINT_TYPES \ -I${LOCALBASE}/include \ -I${LOCALBASE}/include/ijs \ -I${LOCALBASE}/include/libpng \

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• need help configuring port to input in 8051

  - by Aabid Ali

  The connection is as follows An infrared sensor circuit which yields 0 or 5v depending on closed or open circuit output line to port 2_0 pin of microcontroller 8051 philips.Problem is when i do this the circuit value are overridden by the current value on port 2_0 led always goes on.Here is my code(in keil c) i guess i have not configured P 2_0 as input properly void MSDelay(unsigned int); sbit led=P1^0; void main() { unsigned int var; P2=0xFF; TMOD=0x20; TH1=0xFD; SCON =0x50; TR1=1; while(1) { var=P2^0; if(var==0) { led=1; SBUF='0'; while(TI==0); TI=0; MSDelay(250); } else { led=0; SBUF='9'; while(TI==0); TI=0; MSDelay(100); } } }

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• Sharing a COM port over TCP

  - by guinness

  What would be a simple design pattern for sharing a COM port over TCP to multiple clients? For example, a local GPS device that could transmit co-ordinates to remote hosts in realtime. So I need a program that would open the serial port and accept multiple TCP connections like: class Program { public static void Main(string[] args) { SerialPort sp = new SerialPort("COM4", 19200, Parity.None, 8, StopBits.One); Socket srv = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp); srv.Bind(new IPEndPoint(IPAddress.Any, 8000)); srv.Listen(20); while (true) { Socket soc = srv.Accept(); new Connection(soc); } } } I would then need a class to handle the communication between connected clients, allowing them all to see the data and keeping it synchronized so client commands are received in sequence: class Connection { static object lck = new object(); static List<Connection> cons = new List<Connection>(); public Socket socket; public StreamReader reader; public StreamWriter writer; public Connection(Socket soc) { this.socket = soc; this.reader = new StreamReader(new NetworkStream(soc, false)); this.writer = new StreamWriter(new NetworkStream(soc, true)); new Thread(ClientLoop).Start(); } void ClientLoop() { lock (lck) { connections.Add(this); } while (true) { lock (lck) { string line = reader.ReadLine(); if (String.IsNullOrEmpty(line)) break; foreach (Connection con in cons) con.writer.WriteLine(line); } } lock (lck) { cons.Remove(this); socket.Close(); } } } The problem I'm struggling to resolve is how to facilitate communication between the SerialPort instance and the threads. I'm not certain that the above code is the best way forward, so does anybody have another solution (the simpler the better)?

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• Polling servers at the same port - Threads and Java

  - by John

  Hi there. I'm currently busy working on an IP ban tool for the early versions of Call of Duty 1. (Apparently such a feature wasn't implemented in these versions). I've finished a single threaded application but it won't perform well enough for multiple servers, which is why I am trying to implement threading. Right now, each server has its own thread. I have a Networking class, which has a method; "GetStatus" -- this method is synchronized. This method uses a DatagramSocket to communicate with the server. Since this method is static and synchronized, I shouldn't get in trouble and receive a whole bunch of "Address already in use" exceptions. However, I have a second method named "SendMessage". This method is supposed to send a message to the server. How can I make sure "SendMessage" cannot be invoked when there's already a thread running in "GetStatus", and the other way around? If I make both synchronized, I will still get in trouble if Thread A is opening a socket on Port 99999 and invoking "SendMessage" while Thread B is opening a socket on the same port and invoking "GetStatus"? (Game servers are usually hosted on the same ports) I guess what I am really after is a way to make an entire class synchronized, so that only one method can be invoked and run at a time by a single thread. Hope that what I am trying to accomplish/avoid is made clear in this text. Any help is greatly appreciated.

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• Garbage data from serial port.

  - by sasayins

  Hi I wrote a code in Linux platform that read the data in serial port, my code below: int fd; char *rbuff=NULL; struct termios new_opt, old_opt; int ret; fd = open("/dev/ttyS0", O_RDWR | O_NOCTTY); if( fd == -1 ) { printf("Can't open file: %s\n", strerror(errno)); return -1; } tcgetattr(fd, &old_opt); new_opt.c_cflag = B115200 | CS8 | CLOCAL | CREAD; new_opt.c_iflag = IGNPAR /*| ICRNL*/; new_opt.c_oflag = 0; new_opt.c_lflag = ICANON; tcsetattr(fd, TCSANOW, &new_opt); rbuff = malloc(NBUFF); printf("reading..\n"); memset(rbuff,0x00,NBUFF); ret = read(fd, rbuff, NBUFF); printf("value:%s",rbuff); if(ret == -1) { printf("Read error:%s\n",strerror(errno)); return -1; } tcsetattr(fd, TCSANOW, &old_opt); close(fd); My problem is the code above doesn't read the first data that was transmitted, then the second transmission the data is garbage, then the third is the normal data. Did I missed a setting in the serial port? Thanks.

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• WinXP: Error 1167 -- Device (LPT1) not connected

  - by Thomas Matthews

  I am writing a program that opens LPT1 and writes a value to it. The WriteFile function is returning an error code of 1167, "The device is not connected". The Device Manager shows that LPT1 is present. I have a cable connected between a development board and the PC. The cable converts JTAG pin signals to signals on the parallel port. Power is applied and the cable is connected between the development board and the PC. The development board is powered on. I am using: Windows XP MS Visual Studio 2008, C language, console application, debug environment. Here is the relevant code fragments: HANDLE parallel_port_handle; void initializePort(void) { TCHAR * port_name = TEXT("LPT1:"); parallel_port_handle = CreateFile( port_name, GENERIC_READ | GENERIC_WRITE, 0, // must be opened with exclusive-access NULL, // default security attributes OPEN_EXISTING, // must use OPEN_EXISTING 0, // not overlapped I/O NULL // hTemplate must be NULL for comm devices ); if (parallel_port_handle == INVALID_HANDLE_VALUE) { // Handle the error. printf ("CreateFile failed with error %d.\n", GetLastError()); Pause(); exit(1); } return; } void writePort( unsigned char a_ucPins, unsigned char a_ucValue ) { DWORD dwResult; if ( a_ucValue ) { g_siIspPins = (unsigned char) (a_ucPins | g_siIspPins); } else { g_siIspPins = (unsigned char) (~a_ucPins & g_siIspPins); } /* This is a sample code for Windows/DOS without Windows Driver. */ // _outp( g_usOutPort, g_siIspPins ); //---------------------------------------------------------------------- // For Windows XP and later //---------------------------------------------------------------------- if(!WriteFile (parallel_port_handle, &g_siIspPins, 1, &dwResult, NULL)) { printf("Could not write to LPT1 (error %d)\n", GetLastError()); Pause(); return; } } If you believe this should be posted on Stack Overflow, please migrate it over (thanks).

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