Emulation d'un port com via un port USB en LabView
Bonjour,
Dans le cadre d'un projet, un FPGA (vertex V6) m'envoie des trames de données à interpréter dans LabView. Le soucis qui se pose est le suivant, voulant traiter les données dans LabView, comment est-ce que je peux paramétrer le NI-VISA pour recevoir les trames ?
Le soucis réside dans le fait que mon matériel FPGA n'a pas d'identifiant propre et que je n'arrive pas à le configurer proprement . Doit-je passer par un adaptateur USB-Série ou bien existe-t'il une solution purement logicielle ?
Merci d'avance.
Résolu !
Accéder à la solution.
Bonjour Sylvain_j05,
Le driver VISA propose un jeu de fonctions haut niveau qui permettent d'appeler des fonctions bas niveaux. Si vous utilisez un port USB en partant de votre PC, vous devrez avoir également un port USB disponible sur votre matériel contenant le FPGA et permettant de récupérer ses valeurs. Sinon, un adaptateur Série-USB peut être envisagé s'il n'y a qu'un port série disponible sur votre matériel.
Vous pouvez également essayer un adaptateur USB-Série sur votre PC (si ce dernier ne dispose pas de port série directement intégré) qui vous permettra d'avoir des ports série directement disponibles depuis votre programme sous LabVIEW.
Exemple d'adaptateurs existants : NI USB-232, NI USB-232/2, NI USB-232/4
N'hésitez pas à fournir davantage d'informations et notamment à répondre aux questions d'Helmut O'Brian.
Cordialement,
Jérémy C.
National Instruments France
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Aquisition des données via port COM ; LABVIEW
Bonjour,
Je suis entrain de réalisé un projet de groupe et je me suis chargé de la partie aquisition sur labview et il me reste seulement 3 semaine pour la soutenance. Projet controle d'accées: transpondeur
J'ai réalisé les VI suivant
Au début, on veut lire tous les codes des cartes à disposition et les enregistrer .
Mon problème c'est que je n'arrive pas à enregistrer les données reçus dans un fichier tableur qui va contenir la liste des utilisateurs ( Noms + codes des cartes ) autorisé à entrer . ( à partir de ce fichier tableur ,une fois établi, on va comparer le code du badge présent au niveau de l'unité de lecture avec les codes existants , et renvoyer la réponse ).
Je veux donc lire les données sur le port COM puis , dans une seconde etape ajouter ces données dans un fichier tableur .
Comment dois je faire ?
Attachments:
ajouter les données dans un tableur + date + heure.vi 80 KB
aquisition_enregistrement.vi 77 KBbonjour,
j'arrive à m'en sortie mnt pour la programmation du VI ; j'ai passé au test , mais là je rencontre des problèmes , j'effectue une communication serie avec un microcontroleur 16F877 , et lorssque je lance le VI , je recois cette trame \F0\F0\00\00\00, et directement ensuite l'erreur : L'erreur -1073807298 s'est produite à : VISA Read dans Controle d'acces.vi ( Raisons possibles :VISA: (Hex 0xBFFF003E) Impossible d'effectuer l'opération à cause d'une erreur d'E/S.) . Est-ce que cela peut provenir de mon Vi ? le voici en piece jointe
Attachments:
Controle d'acces.vi 25 KB -
I have a Sony DCR TRV17 that I used to pass through VCR tape video via Firewire port to my Mac Pro under Imovie 9.0.9 without an issue. Now under Imovie 10.0 the video shows in the import window, I can start recording yet when I stop recording the recorded clips do not show up anywhere. The movie file I'm creating still indicates that I still need to import video. Anyone having similar problems?
Hey Dave,
I had this issue only once before but was lucky enought to find it was a specific event causing the import to freeze. It took me some time to isolate the problem though. I would recommend letting it sit there for some time before you try any troubleshooting. Larger libraries can take long periods of time to update.
This is a good thread for this issue. I would first try removing the iMovie.plist as elikness mentions.
1. Open Finder
2. Click on "Go" in the menu bar.
3. Click on Go To Folder on the dropdown menu.
4. Type "~/Library/Preferences/" in the text field and click Go.
5. Find the com.apple.iMovie(some number).plist file and move it to Trash.
Quit and relaunch iMovie to see if this took care of the issue before attempting the next step. If you're still having an issue then you can try what I needed to do which is isolating the problem event.
1. Open Finder.
2. Go to the Movies folder. You should see iMovie Events here.
If you have a larger event library I'd recommend renaming the iMovie Events folder to say, "iMovie Events COPY". Then create a new empty folder named “iMovie Events”. When you launch iMovie 9.0.9 all events will be missing at this point. Quit iMovie if it is open. Then you can either drag each event from iMovie Events COPY to iMovie Events or you can select and drag several at a time. Each time you drag an event folder back into the new iMovie Events folder launch iMovie 9.0.9 to see if you are having the same issue. Wash and repeat until either you have found the problem event or you have imported all events.
If you find the problem event you can reimport the clip from iMovie 9.0.9 by going to File > Import > Movies and navigating to that events iMovie Original Movies folder to find the clip.
Hope this helps! -
Will an X220 drive a Dell UP2414Q 4K 3840 x 2160 Monitor via Display Port?
I've not been able to find any information about this on the web and there is definitely some confusion about DisplayPort versions - could some one answer the question will an X220 drive a Dell UP2414Q 4K IPS Monitor at it's native resolution of 3840 x 2160 Monitor via Display Port? Would that be at 30Hz rather than 60Hz?
Many thanks, Mark.
Solved!
Go to Solution.The X220 will drive the Dell UP2414Q 4K resolution through Displayport. I have tested this on the Pro2840m LCD which has the same resolution. But only on 30 hz refresh rate.
The X220 with the Series 3 Workstation Dock will drive 2 of the Pro2840m through 2 separate displayport.
The X201 will also drive this 4K resolution, as long as the LCD's 4K can accept Displayport 1.1 standard (on the 1.2 standard, the LCD will stay blank).
https://www.flickr.com/photos/lead_org/14671257827/in/set-72157645860787090
the above image confirms the 4K resolution and my X220 driving that resolution @ 30 hz.
For 60 hz refresh rate on the 4K resolution with integrated Intel GPU, you need Haswell CPU with the HD5000 graphics card, anything below that will only drive the 4K resolution at 30 Hz.
Regards,
Jin Li
May this year, be the year of 'DO'!
I am a volunteer, and not a paid staff of Lenovo or Microsoft -
How can i browse FP 2000 via serial port same use Ethernet port(RJ 45)?
I am a new user for labview.I develope my program with FP 2000 but I have some problem
1 How can i browse FP 2000 via serial port same use Ethernet port(RJ 45)? if it can Tell me please.
2 If I use GSM/GPRS modem via FP 2000 rs 232 port (I under stand how to send AT command) and leave it stand alone
Can I dial modem and browse file in FP 2000 same as use Ethernetport?
Someone please help me.Thank you very much.Hi!
First, I can say that your project involves many things, I cannot describe all features in the forum, and I'm not used with GPRS modems (my modems are base band serial modems...).
Anyway, I would say that in your project you should proceed like this:
1) Configure your FP 2000 module via MAX and ethernet connection;
2) Download an embedded application to your module (build in LabView Real-Time)
3) In your application, you should build a kind of serial port manager, and by the means of serial port you send/receive commands from PC.
The commands from PC can include "Tell me the about the FP 2000 file system ", or "switch on line X", or anything you need.
I think it would be difficult to use Internet exp, because you use IE with TCP/IP, and TCP/IP is over ethernet.
I know that for Windows you can find some wrappers that make you "see" the serial port as an ethernet, but these wrapper do not exist under filed Point, and you shoul build one yourself!!!(and that's not easy).
For example, to browse your files, you should build a VI that searches through your file system, and reports, via serial, the files present in a directory (it's an example....).
About communication between GPRS modems and FP2000, I know nothing. I suppose that these modems accept serial inputs, so you'll have to configure your serial port on FP 2000 with the correct baud rate, parity, and so on..... and you send your data to the modem. The modem will transfer data in its way, no matter on how it does.
To send data to your modem you shoud take a look to some Serial communication examples. What I suggest you, first, is to connect the serial port of FP2000 to a PC, and test communication between PC and FP2000, without modems. Just direct cable connection! If you're able to do this, insertion of modems is the next step, and should be quite easy. If you're not able to make the PC receive strings of data from FP2000, over RS232, adding modems is a further complication, and you won't come out of this mess!
So, what I say, is just build, for now, a simple embedded application for FP2000, that, using RS232, sends data to a PC (you should see data sent with use of Hyper terminal).
To build this application, use Instrument I/O --> VISA commands (VISA open, VISA write, and Property node should be enough, for now).
Please, let me know if this helps......
Have a nice (programming) day!
graziano -
Bonjour à tous,
J'écris pour solliciter une aide car je dois recupérer avec Labview des données délivrées par un autocollérateur via la port série ( RS232). Sera la bienvenue, des sites, des cours, des codes ds d'autres langages, tout ce qui peut m'aider.
Merci d'avance à touste et à tous
j'attends avec impatiance votre réponseBonjour,
comme l'a très bien dit "tbob", il existe de nombreux exemples de communication série fourni avec LabVIEW.
Si vous débutez en LabVIEW, il existe des ressources pédagogiques sur le site de National Instruments qui vous aideront à commencer à programmer avec LabVIEW.
Ci-joint un lien depuis lequel vous pourrez accéder à ces différents tutoriaux :
http://www.ni.com/academic/lv_training/how_learn_lv.htm
De plus, il existe dans le "Developper zone" du site de NI, un grand nombre de bibiothèque de fonctions spécialement dévéloppées pour le contrôle instruments, un grand nombre d'instruments possède sa librairie, peut-être y trouverez vous le votre.
http://sine.ni.com/apps/we/niid_web_display.drv_search
En espérant que ces différents liens vous aideront,
Cordialement,
Benjamin M
NIF -
Connection Siemens TC65 to PC via serial port
I don't connect Siemens TC65 via serial port . How can I do this? How can I upload java code in tc65..
Is there anyone to solve this problem?tajava
Welcome to the forum. Please refrain from posting in old threads that are long dead. When you have a question, please start a topic of your own. Feel free to provide a link to an old thread if relevant.
I also suggest you go through these links before posting again:
[How to ask questions the smart way|http://catb.org/~esr/faqs/smart-questions.html]
[How To Get Good Answers To Your Questions|http://www.tek-tips.com/viewthread.cfm?qid=473997]
I'm locking this thread now.
db -
Problem communicating via serial port in Linux
Hello,
I am trying to transfer data via serial port, in Linux.
But it is impossible till now!
I get Runtime exception.
Here is my code:
public class Main {
public Main() {
int num=5;
int[] array = new int[5];
public static void main(String args[]) {
java.awt.EventQueue.invokeLater(new Runnable() {
public void run() {
array[0]=1;
array[1]=2;
array[2]=3;
array[3]=4;
array[4]=5;
new ParallelCommunication(num,array);
import java.io.*;
import java.util.*;
import javax.comm.*; // for SUN's serial/parallel port libraries
//import gnu.io.*; // for rxtxSerial library
public class ParallelCommunication implements Runnable, SerialPortEventListener {
static CommPortIdentifier portId;
static CommPortIdentifier saveportId;
static Enumeration portList;
InputStream inputStream;
SerialPort serialPort;
Thread readThread;
static OutputStream outputStream;
static boolean outputBufferEmptyFlag = false;
int num;
int[] array;
public ParallelCommunication(int this_num,int[] this_array) {
boolean portFound = false;
String defaultPort;
num = this_num;
array=new int[this_array.length];
array = this_array;
// determine the name of the serial port on several operating systems
String osname = System.getProperty("os.name","").toLowerCase();
if ( osname.startsWith("windows") ) {
// windows
defaultPort = "COM1";
} else if (osname.startsWith("linux")) {
// linux
defaultPort = "/dev/ttyS0";
} else {
System.out.println("Sorry, your operating system is not supported");
return;
// if (args.length > 0) {
// defaultPort = args[0];
System.out.println("Set default port to "+defaultPort);
// parse ports and if the default port is found, initialized the reader
portList = CommPortIdentifier.getPortIdentifiers();
while (portList.hasMoreElements()) {
portId = (CommPortIdentifier) portList.nextElement();
if (portId.getPortType() == CommPortIdentifier.PORT_SERIAL) {
if (portId.getName().equals(defaultPort)) {
System.out.println("Found port: "+defaultPort);
portFound = true;
// init reader thread
initialize();
break;
if (!portFound) {
System.out.println("port " + defaultPort + " not found.");
public void initwritetoport() {
// initwritetoport() assumes that the port has already been opened and
// initialized by "public void initialize()"
try {
// get the outputstream
outputStream = serialPort.getOutputStream();
} catch (IOException e) {}
try {
// activate the OUTPUT_BUFFER_EMPTY notifier
serialPort.notifyOnOutputEmpty(true);
} catch (Exception e) {
System.out.println("Error setting event notification");
System.out.println(e.toString());
System.exit(-1);
public void writetoport(int counter) {
try {
// write string to serial port
outputStream.write(String.valueOf(array[counter]).getBytes());
} catch (IOException e) {}
public void initialize() {
// initalize serial port
try {
serialPort = (SerialPort) portId.open("SimpleReadApp", 2000);
} catch (PortInUseException e) {System.out.println("Port In Use.");} //******Here is the Exception******
try {
inputStream = serialPort.getInputStream();
} catch (IOException e) {}
try {
serialPort.addEventListener(this);
} catch (TooManyListenersException e) {}
// activate the DATA_AVAILABLE notifier
serialPort.notifyOnDataAvailable(true);
try {
// set port parameters
serialPort.setSerialPortParams(9600, SerialPort.DATABITS_8,
SerialPort.STOPBITS_1,
SerialPort.PARITY_NONE);
} catch (UnsupportedCommOperationException e) {}
// start the read thread
readThread = new Thread(this);
readThread.start();
public void run() {
// first thing in the thread, we initialize the write operation
initwritetoport();
for(int i=0; i<=num_of_inputs; i++) {
// write string to port, the serialEvent will read it
writetoport(i);
serialPort.close();
public void serialEvent(SerialPortEvent event) {
switch (event.getEventType()) {
case SerialPortEvent.BI:
case SerialPortEvent.OE:
case SerialPortEvent.FE:
case SerialPortEvent.PE:
case SerialPortEvent.CD:
case SerialPortEvent.CTS:
case SerialPortEvent.DSR:
case SerialPortEvent.RI:
case SerialPortEvent.OUTPUT_BUFFER_EMPTY:
break;
case SerialPortEvent.DATA_AVAILABLE:
// we get here if data has been received
byte[] readBuffer = new byte[20];
try {
// read data
while (inputStream.available() > 0) {
int numBytes = inputStream.read(readBuffer);
// print data
String result = new String(readBuffer);
System.out.println("Read: "+result);
} catch (IOException e) {}
break;
}...and the outcome is :
Exception in thread "AWT-EventQueue-0" java.lang.RuntimeException:
Error opening "/dev/ttyS0"
tcgetattr(): Input/output error
at com.sun.comm.LinuxDriver.getCommPort(LinuxDriver.java:66)
at javax.comm.CommPortIdentifier.open(CommPortIdentifier.java:369)
at ParallelCommunication.initialize(ParallelCommunication.java:128)
I have searched a lot and I couldn't find a solution.
Thank you.I'm having the same problem this helped somewhat debug the problem
http://bloggerdigest.blogspot.com/2006/11/linux-serial-com-port-diagnostic-test.html
I'm running Suse 10.3 and apparently it does not recognize my serial ports. So before
you can test your Java code you have to figure out how to make linux see the ports.
If I find a solution I'll let you know but if you find one first let me know. Thanks. -
Delay the first dot1x authentication message after a port comes up
Cisco ISE: 1.2
Switch IOS: 15.0.2.EX4
Hello,
I have configured the APs to authenticate with 802.1X via the switch.
When I shut the port on which the AP is connected and then no shut it, the port comes up a few seconds later and the switch sends a dot1x authentication.
I feel that the AP has not finished to boot and that's why it fails because the AP doesn't answer that authentication request.
I was wondering if it's possible to delay the first authentication message the switch sends just after a port comes up ?
When I use debug commands I see
%DOT1X-5-FAIL: Authentication failed for client (Unknown MAC) on Interface Gi3/0/18 AuditSessionID 00000000000006567DDB81C9
%AUTHMGR-7-RESULT: Authentication result 'no-response' from 'dot1x' for client (Unknown MAC) on Interface Gi3/0/18 AuditSessionID 00000000000006567DDB81C9
%AUTHMGR-7-FAILOVER: Failing over from 'dot1x' for client (Unknown MAC) on Interface Gi3/0/18 AuditSessionID 00000000000006567DDB81C9
%AUTHMGR-7-NOMOREMETHODS: Exhausted all authentication methods for client (Unknown MAC) on Interface Gi3/0/18 AuditSessionID 00000000000006567DDB81C9
%AUTHMGR-5-FAIL: Authorization failed or unapplied for client (Unknown MAC) on Interface Gi3/0/18 AuditSessionID 00000000000006567DDB81C9
NB: you'll see exhausted all authentication methods because I only configured dot1x on the port (no mab or anything else)
Thank you for all answersHello,
Thank you for your reply. That document is very interesting.
I've just read the chapter regarding the profiling with APs so far and got them working properly the way they showed it.
However I'm not a big fan of MAB and profiling. Because ISE retieves CDP informations collected through SNMP.
- You need CDP (or LLDP) enabled and you might not want that for different reasons (Security, Interoperability...)
- A machine could lie about its identity and pretend through CDP that it's a controller, an AP, a printer and so on.
That's why the best option, in my opinion would be that the AP sends its credentials and ISE accept it or reject is.
It's possible to do this with the Cisco APs
http://www.cisco.com/c/en/us/support/docs/wireless/4400-series-wireless-lan-controllers/99791-eapfast-wlc-rad-config.html
I'm wondering why Cisco chooses a different EAP method for each of their devices (EAP-MD5 -> Cisco Phones, EAP-FAST -> AP)
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When I connect my Mac Mini 2011 with Lion to a TV via HDMI and an earphone cable is plugged in, it´s not possible to choose sound out via hdmi, as opposed to connection via the minidisplay port. Anybody knows how to fix this?
Was just on the phone with Apple about this.
The solution was as follows for me anyway...
Go to your Finder
Choose the Go Menu
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Choose your "Library" Folder
Choose the "Preferences" Folder
There should be a folder called "Audio"
Move that whole folder to the trash
Empty the Trash
Restart from the Apple Menu
When you are back up and running;
Choose System Preferences from the Apple Menu
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In the output tab you should now be able to make the HDMI "Sticky"
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Hi all,
I have an app with 2 servlets, I want each servlet to be accessible via a different port.
so I open HTTP on my web server, on port 80 and 18080, but now BOTH servlets are available via BOTH ports.
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How to transfer file from PC to PC via serial port using labview
I need to transfer files(.txt, .doc, .xls) from PC to PC via serial port using LabVIEW. Is it possible to transfer files, if so how to transfer?
Solved!
Go to Solution.Yes, it is possible to transfer files with the serial port using LabVIEW. Files are just collections of bytes and the serial port is pretty good at shipping bytes from one PC to another. You need to connect the serial ports together with a null modem cable.
First, take a look at the example for serial communication. In LabVIEW, go to the Help menu and select "Find Examples...". From there you can search for "serial" or navigate to Hardware Input and Output >> Serial. Select the "Basic Serial Write and Read.vi". Experiment with that example to gain confidence on the serial communication methods.
Next, it's time to learn about how to read and write files. For that, the examples could be somewhat confusing since they all deal with files that are presumed to have data of a specific type in them. I would recommend just getting familiar with the functions on the File I/O palette. Specifically, get to know the following functions.
Open/Create/Replace File - On your destination side, you'll need to create the copy of the file that you are trying to transfer
Close File - When you are finished reading from or writing to a file, you should close it. It cleans up the memory being used and finalizes any write operations that are still floating in the write buffer.
Read From Binary File - The best way to read from a file when you do not really care what type of file it is. In your case, you just want to get those bytes read and sent out so they can be written down at the destination.
Write to Binary File - At the destination side, this is what will store those bytes to the file you created with number 1.
Get File Size (under the Advanced File Functions sub-palette) - You need to know how big the file is so you know when you are finished.
OK, so once you are able to create files, write bytes to them, and read bytes from existing files you can move on to transferring.
The basic method I would suggest is to have the user specify a source file on the source PC and a destination folder on the destination PC. Then, find out the size of the source file using number 5. Divide that size number by the number of bytes you feel like transferring at once. The serial buffers are usually around 32k (if I remember correctly) so do not exceed that. Now begin sending data by reading some number of bytes and wiring that string output to the VISA Write function. On the destination side, you'll want to be monitoring the serial port for bytes and reading them when they arrive. Wire that string to the Write to Binary File function to add them to your destination file.
That is the basic outline of how to do it. You have to be careful not to overload the write and read buffers on the serial ports. Initially you can use delays on the sending side to make sure the reading side has enough time to digest. To get things moving faster, you can bring in some flow control.
If all that sounds a bit intimidating, there are Alliance Member companies out there (such as PrimeTest Automation) who can write such code for you and even provide a turnkey solution for you.
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Dan Press
Certified LabVIEW Architect
PrimeTest Automation -
Transfer of mini-DV tapes from Panasonic NV-GS120 to MacBook Pro via FireWire port (9-pin)
I am new to Mac and love it. I would like to transfer my old mini-DV tapes from Panasonic NV-GS120 to my MacBook Pro via FireWire port (9-pin), but am not sure which port to use on the video camera. Reading from the top on the Panasonic video camera there are three options: a "mini-usb" port, a "remote/mic (plug in power)" [not likely] and finally a "A/V out phones" jack entry [which I use for viewing the tapes on the TV screen via the jack cable ending up in a red, yellow and white cable to plug into TV.
I have read Bengt Wärleby's excellent instructions and am ready to buy the FireWire cable (9-pin in one end - Mac), but I am not sure if it is the mini-usb or jack-stick exit of the video camera. Or, indeed, if there is talk about an external A/V box needed to decode and transfer the digital tapes to iMovie on the Mac.
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JLensThe port you're looking for is the DV Port (in your manual it's marked as control component #55). I looked up your camera and it does have it. That's the port where the firewire should fit. Hope to have helped you.
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Sony digital8 camcorder via firewire port, is it digital or analog?
hi all,
I was successful to view & record from my Sony digital8 cam via firewire port. I'd like to know, is this connection analog or digital? Has anyone been successful to record, back up and edit their precious home videos on a G4 PowerMac? And how many DVD discs will it take on a full Digital8 cartridge?
Thanks for your help
Web dudeis this connection analog or digital?
A Firewire port is all digital.
Has anyone been successful to record, back up and edit their precious home videos on a G4 PowerMac?
Yes. Before the G5 came out, many people used G4s (and some still do) to edit not only home videos, but commercial television programs as well.
how many DVD discs will it take on a full Digital8 cartridge?
A standard DVD-5 (single layer disc) will hold about two hours of DVD-Video ... video AFTER it's been properly compressed to meet the DVD-Video standard.
However, if you're asking about raw footage (not compressed more than it was recorded), you should be able to get close to 14 minutes of footage per 4.7gb disc. Digital8 uses the DV codec which requires about 13.3gb per hour of footage. If you recorded the tape in SP mode, you should be able to get just over 1 hour of footage per tape.
-DH -
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Solved!
Go to Solution.Looking at the specs, this tablet does not have HDMI. So I see no way you can connect it to your TV. Some of the newer TV's may be able so share your network to play files that are on your tablet.
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