Pre-programmed sequence for data bits on parallel port.

I've found and made a bunch of vis that allow for interactive high/low control of the 8 data bits on the parallel port. I want to control each pin with a pre-programmed pattern of bits. Any ideas?

A U8 is an unsigned 8 bit number. To create one place a number control down on the front panel. Right-click on it and select Representation>>U8. To create an array of U8s you place an array control down, and then drag the above numeric into the array shell. You now have an array of U8s, which you can expand and place things in it.

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Why does a standalone program created in Labview 8.5 try connecting to the internet when the program only reads data through the serial port? Firewalls object to progams that contact the internet without permission.

why does a standalone program created in Labview 8.5 try connecting to the internet when the program only reads data through the serial port? Firewalls object to progams that contact the internet without permission.
The created program is not performing a command I have written when it tries to connect to the internet, it must be Labview that is doing it. How do I stop this from happening?
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It looks that way..
"When LabVIEW starts it contacts the service
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Message Edited by Ray.R on 11-04-2009 12:25 PM

Hot fix 4 is 64 bit. What to do if need to sequence for W732 bit embedded ?

Hello,
hot fix 4 for APP-V 5 SP2 is 64 bit
what to do if I want to sequence for W7 Embedded 32 bit (Hp Thin Client)
On sequencer (w7 32bit) and client W7 32 bit SP2 I cannot install hotfix 4.
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I guess I have to try and see if it considerable in my environment?
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"When you hit a wrong note it's the next note that makes it good or bad". Miles Davis

Those are 32-bit executables that will install the right hotfix or Sequencer on x86 or x64 Windows.
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Send bit to parallel port

Hello LV community,
I am sending bits to my parallel port to communicate with my ASIC but I have an issue to enter some test modes which require to send simultanously for example 3 bits at the same time into 3 pins to the port, I can seen from the scope that there are some delays between them (aprox.20 us).
My question is, this delays is it due to the PC performance or the way to send them? I am using the Out Port8.via for thi purpose. Is there any solution for this issue?
Thx

Hi,
I don't really know your program but maybe you a better of with a Digital I/O board to avoid these delays. Most people use these boards to control there parallel port at high speed by directly accessing the pins. Don't forget that when you are using Port In and Port Out that you are still using software calls and you are dependant on PC performance.
Regards.
JorisV

Using stand alone executables to send data to the parallel port

I have a executable that uses the parallel port to activate an alarm. The program works well on the base machine which is running windows XP. However when I try to run the stand alone executable on a windows NT machine there is nothing sent to the parallel port. I have updated the Cvirt file on all machines. I don't get any error messages when running the stand alone executable.

I have the same situation using parallel port to control a hot swap PCI extender card and no error showed. I can turn on/off and read correct voltages from the card in base machine. After creating executables, I can turn on/off the card, but got wrong voltages in target machine.
I've installed AccessHW in both machines and copied AccessHW.dll and cvirte.dll to system32 folder and the folder same with executables. I also tried installer with port support and serial support checked.
Windows XP is in both machines and LV 7 in base machine. I use "Output Byte to Port.vi" and "Input Byte from Port.vi" in AccessHW lib.
One thing I observe is initiation. The card manufacturer provides a program with same functions. After running their program, the voltage readings from the executables become correct. The readings remain good after closing their program. I close the executables and run the executables again and still see good results unless restarting the target machine.
Any solution for the problem? Thanks in advance!

Pre-Programmed Sequence of Outputs

I have built some basic gearbox controllers in LabView and the all work independantly as expected, motor speed, torque demand etc...
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Thanks in advance.
Richard

Hi Richard,
I suggest using a basic state machine approach here: each step calls a gearbox controller setting and waits for a certain time...
Best regards,
GerdW
CLAD, using 2009SP1 + LV2011SP1 + LV2014SP1 on WinXP+Win7+cRIO
Kudos are welcome

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Pre Checks before running Data Pump Export/Import

Hi,
Oracle :-11.2
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Kindly share the pre-checks required for data pump export and import which should be followed by a DBA.
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How to use the Control lines of a parallel port as Input lines to be read using Labview ?

The details are :
NI Software : LabVIEW
Version : 5.0
OS : Windows 95
NI Hardware : N/A
Drivers : N/A
CPU : Pentium
RAM : 48
Vendor : darcom
Customer Information :
SPEL TESTING
SPEL, INDIA
[email protected]
Ph: (91) 4114 53818
We do not have any DAQ cards within the PC. We have the parallel port which is EPP and ECP compatible having the address 278h on LPT2 and we are trying use this port for reading 8bit data from an external circuit. We developed a vi program in Labview 5.0 to control the parallel port.We tried with the Data lines to send signals from PC to external device through this parallel port with the addr
ess 278h (which
is Data lines) and it works fine. We also tried using reading 4bit data from external
device to PC through this port with the address 279h (which is Status lines) and it
is also working fine.
But it was not possible for us to read through Control lines whose address is 27Ah. Whereas when line printer (dot matrix printer) was
connected, it was possible for us to take print out. Thus printer was working. This
informed us that the control lines are all OK!
Can you please clarify, how to use both control lines and status lines to read 8 bit data through this parallel port using the Labview software.

There are several Knowledge Base entries about this on the NI site, but probably the most detailed document is on the Advanced Measurements (www.advmeas.com) website. Try looking at this page, I think you will find it useful.
http://www.advmeas.com/goodies/parallelport.html

Parallel port under linux

could anybody help a linux-labview beginner?
i'm trying to write to my parallel port. but labview is obviousely not set
up for this. does anywone happen to have a vi which can do that?
best of regards
michael h. fischer
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"michael h. fischer" writes:
> maybe i didn't comunicate here.
> i don't intend to print anything out but i want to set each pin of the port
> hi or low. i'm trying to turn some electrical relay-switches on and off.
>
> thanks anyway, all these hints are useful to me
Michael,
So using an true ASCII printer or dircetly /dev/lpx is the easiest
solution. Just "print" the ASCII charakter representing the bits to
set.
Johannes Nieß
>
> "Johannes Niess" wrote in message
> news:[email protected]..
> > "michael h. fischer" writes:
> >
> > > could anybody help a linux-labview beginner?
> > > i'm trying to write to my parallel port. bu
t labview is obviousely not
> set
> > > up for this. does anywone happen to have a vi which can do that?
> >
> > Michael,
> >
> > I'm not sure how you adress the parallel port.
> >
> > Writing directly to an I/O port is not allowed for security
> > reasons. There are VI's to do the required system calls.
> >
> > You might be able to use the (old) serial VI's with a high serial port
> > number. You can look up the port number on a LV version for Windows.
> >
> > I'd use a completely different strategy: VISA can address parallel
> > ports. With Windows you just use ASRL10. You might need some tweaking
> > of the VISA preferences files to do it.
> >
> > Printing data to a parallel port should be done with the tools
> > designed for it: System Exec: lpr file.txt
> >
> > Does someone have a summary of the options for reading the parallel
> > port and setting control lines via the described methods?
> >
> > Johannes Nieß

RXTX Parallel port communication with Pin Printer

I have successfully installed and configured RXTX-2.0-7pre1 on Linux platform.
2 printers, one Laser jet printer connected to the Serial port and the other Pin Printer connected to the Parallel port.
I can print my files out successfully with RXTX on both my 2 printers. But, there is some problem with my Pin Printer performance. The print job is a little slow and the printing is word by word output.
While the Laser printer received the whole string of my RXTX output and printed them out asap.
RXTX read my data and write them to the Parallel/Serial port directly, so, for my laser jet printer, it buffered the RXTX output data and processed them all in one. No problem, laser printer works well. But to the Pin Printer, it got the RXTX output and printed them out with no buffer. I am not authorized to deal with the Pin Printer device driver.
So, my question is that, is there someone knows how to resolve this problem on RXTX side? That is to say, how to modify the source code of RXTX and customize it?
I wanna know how to create buffer in RXTX, for example, buffering a whole string line and then sending them to the Parallel port. Then, It supposed to be that the Pin Printer will receive once a whole line output and printing line by line in the paper! Not the problemly slowly word by word output!
Thanks a lot!

Simple metrics from google should suffice the SUN team from understand the need/huge requirement for supporting Serial and parallel port programming in windows. Platforms would always change and the team at SUN should remain commited in supporting new platforms.

Servo motor using parallel port

Hello,
I have a XY mirror scan Servo motor used for optical scanning experiment.
The question I have is:
I already have a program to control stepper motor via parallel port. Can I use the same to control servo motor ?
Or is the SERVO motor concept different to that of a STEPPER motor ...
Thank you
Abhilash S Nair
Research Assistant @ Photonic Devices and Systems lab
[ LabView professional Development System - Version 11.0 - 32-bit ]
LabView Gear:
1. NI PXI-7951R & NI 5761
2. The Imaging Source USB 3.0 monochrome camera with trigger : DMK 23UM021
OPERATING SYSTEM - [ MS windows 7 Home Premium 64-bit SP-1 ]
CPU - [Intel Core i7-2600 CPU @ 3.40Ghz ]
MEMORY - [ 16.0 GB RAM ]
GPU - [ NVIDIA GeForce GT 530 ]

You will need a DAQ card that can generate the voltage needed to send a command signal to the 671. The 671 will need to be tuned to the 6880 with whatever sized mirror is attached. (If you bought the galvo and servo driver as a package it should already be tuned.)
CTI systems take in an analog command from -10 to +10 Volts. Almost all the NI DAQ cards (and many other brands) output +/- 10 Volts so that will be easy.
Then you will need to decide how to scan your target. A ramp pattern or triangle wave is the usual choice for scanning objects so you need to generate that in LabVIEW code along with the code that will read your sensor. This should be done simultaneously but you really don't need a very expensive DAQ card to accomplish that. Look on the NI website for options in your price range and do some research...
Is your system one axis (one 6880 and one 671)? If so you will scan a raster (ramp or triangle) to measure a single line of light intensity, move the stage a tiny distance and scan another line. When you put all the lines together into a 2D image you will have a representation of one face of your object. Many people use a rotary stage to spin the object while scanning to assemble a 3D model of the object. This is a bit more complex of course.
Using LabVIEW: 7.1.1, 8.5.1 & 2013

Read from parallel port

I know it's possible to write some data to the parallel port using
LabVIEW, but I don'y know if it's possible to read from the parallel
port.
If someone knows, please advice.
Thanx for reading.
Paul
Sent via Deja.com http://www.deja.com/
Before you buy.

[email protected] wrote:
>I know it's possible to write some data to the parallel port using LabVIEW,
but I don't know if it's possible to read from the parallel port. If someone
knows, please advice.
Thanx for reading.
Paul
Yes, it is very easy to read from the parallel port. There have even been
some VIs floating around allowing you to use the parallel port for digital
I/O using the inport and outport VIs.
To just use it to communicate, just use the VISA VIs with the proper resource
name for the port you are using.
Bob Young - Test Engineer - Lapsed Certified LabVIEW Developer
DISTek Integration, Inc. - NI Alliance Member
mailto:[email protected]

Java and parallel port

I don't know if this is forum I should ask this question but I didn't find any corresponding
to java and ports control.
I'm using Aurox 11.0 linux.
I wonder if I could control each output (DATA pin) of parallel port separately in
Java Communications API?. I can control outputs in Java with JNI but I need to run
program as root. If I would want to create applet which would use parallel port
I would have to create server with which this applet would communicate (Limitations of
applets). But this server would have to run as root. It would affect security of system.

Because of C++ ioperm function. This function requires root privileges. I have JNI Java
program which can control outputs of parallel port on the level of one byte (write
whole byte - all DATA outputs) and C++ program which can control outputs of port separately (control of each pin) and both are based on ioperm function. Both require
root privileges. So my question is: can I control each output pin separately with Java Communications API?. Maybe if I used wholly Java code I could access port with user privileges?.

Pre-programmed sequence for data bits on parallel port.

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