"Arduino TTL serial to Windows (LabVIEW VISA)"

QUick Q for the forum.
I assume serial TTL output from Arduino can be read and written directly by LabVIEW but I am not sure if this is the case when using TTL serial on the arduino.
I realize it is possible to talk to arduino via its secondary(or primary) serial port , the one that sets itself up as a virtual com port the way a USB to serial converter would and uses a USB cable. This is fine.
But what about talking to the board directly?
If I wish to set up Arduino to loop waiting for input on its ttl serial input line how would I connect to it fromthat to my Windows and then LabVIEW?
Do I have to worry about the interface levels out of the PC's serial port? Can I just connect TX RX and ground from the serial port directly to the Arduino TTL serial input?
Thanks in advance.
Solved!
Go to Solution.

I think I just found the answer to my question. It looks to be a solid NO without some form of buffering the interface levels is done.
Windows PC's apparently put out +-12V on the serial line.
Its not a show stopper but I was kind of hoping it would be a little easier to do this.
Has anyone attempted to make a psuedo serial connection to arduino using a bit bang technique (as in digital I/O) ?
If you have any code Id .love to see it.
Thanks again..

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Hi,
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Tunde
Message Edited by Tunde A on 04-18-2007 02:28 PM
Attachments:
List Windows Application LV8.0.zip ‏55 KB

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Implementar protocolo de comunicação serial UART no LabVIEW

Boa Tarde,
Estou querendo implementar o protocolo de comunicação serial UART no LabVIEW.
A descrição do projeto é mais ou menos essa:
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Fernando Esquírio Torres

Good morning, Fernando,
Here are some links to help in its implementation. Any questions please contact us.
What Is the Basic Architecture for Serial Communication?
http://digital.ni.com/public.nsf/allkb/E0D95CB9249FB8CF86256C68007B1F81?OpenDocument
Can I Do 9-bit Serial Communication Instead of 7 or 8 bits?
http://digital.ni.com/public.nsf/allkb/3BDC7FF03541F772862564990057F919?OpenDocument
9-Bit Serial Writing in LabVIEW
http://digital.ni.com/public.nsf/allkb/E0D95CB9249FB8CF86256C68007B1F81?OpenDocument
Serial Communication Starting Point
http://zone.ni.com/devzone/cda/tut/p/id/4049
Serial Communication - Basic Serial Write and Read
http://zone.ni.com/devzone/cda/epd/p/id/2669
Enviar ou Receber Dados Binários / Hexadecimais Utilizando NI-VISA no LabVIEW
http://digital.ni.com/public.nsf/allkb/33C1056D66078118862577450061E683?OpenDocument
Sending and receiving serial commands using VISA
http://zone.ni.com/devzone/cda/epd/p/id/2423
Sincerely,
Mauro Vera
Applications Engineer
National Instruments

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.
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Happy wiring,
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Certified LabVIEW Architect
PrimeTest Automation

Communicating USB using Labview VISA

I have a USB RAW device that I am trying to communicate with using labview VISA. I have had success with setting up the driver and I am able to get information from the device such as serial number, etc. When I try to use the VISA read and write commands, I have no success getting the information I want. The commands are simple: R SP<CR><LF> is a read set point command. The only thing I do get back for every command I try, is a 2 byte message "01 60"hex.
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[email protected]

Hello Chris, I do not receive any errors and yes, I am including the termination characters in the string.
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Thanks!!
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Pipe handle: 0x87696D6C
Transfer flags: 0x00000002 (USBD_SHORT_TRANSFER_OUT, USBD_SHORT_TRANSFER_OK)
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Calling labview VIs from python in Linux

Hello.
I've spent some time searching for this but I haven't found exactly what I was hoping for.
I'm involved in a project that we're starting now and it involves creating a complex software architecture in order to control a robot. This software will need to perform multiple tasks such as interfacing with hardware (which LabView is perfect for) as well as planning and high performance image processing (which LabView isn't as great for).
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Does anybody have an idea on how to do this?

Unfortunately that's not an option. This is an interdisciplinary school project involving students from engineering (mechanical, electrical and more), computer science and more fields. Some of these students have gotten used to using Labview and this is the main reason I'm trying to accomplish this. I want to have the higher level architecture done in a scripting language such as python which will enable us to create modules in various different environments such as C++ for tasks requiring high performance (image processing for example), Labview for tasks that the people used to using that and even something running on the GPU if there's use for that. Python would make it easy to glue all these components together while maintaining an environment that would make it very easy to configure the whole software system in different ways.
I'd also prefer that this all run on Linux.
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Where can I find example LabVIEW VIs for the NI-USRP?

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Hello,
It looks like Agilent/HP makes the 8990A, but I was not able to find a driver for it that we or Agilent has written for this device.
Since I am not familiar with the 8990A, I cannot recommend which drivers might be similar, but you are pointed in the right direction. Agilent themselves might know more about which models use similar command sets so that you can modify a driver easily.
Hope this helps.
Scott B.
Applications Engineer
National Instruments

Some errors when calling LabVIEW VIs Interactively from DIAdem

Hi! I'm having some trouble using the "Calling LabVIEW VIs Interactively from DIAdem" found on:
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Following the troubleshooting section didn't resolve the issue. I
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Error in <MenuAdd...ctDo.vbs (row:1, column: 1)
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Brad, thanks for the reply! Below is my (correct?) modification of your script. Have I got it right?
Dim lvapp, vi, viPath, paramName(1), paramVal(1)
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paramName(0) = "In Name"
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MsgBox "Parameter1 Value = " & paramVal(1)
I am not sure about the format of the <paramName(0) = "In Name">.
The control name is "In" and is a I32, the name for the indicator is
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Running the script gives an error in line 4, that is the <Set vi =
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Message Edited by Roger Isaksson on 09-09-2005 10:22 AM
Message Edited by Roger Isaksson on 09-09-2005 10:22 AM
Attachments:
VBError.JPG ‏181 KB
Test1.vi ‏9 KB

Labview visa couldn't read and write in wireless port

Hi I have a problem using wireless serial port in Labview. I couldn't read the data from the serial port. the Max could find the port com10 and com 11 and also find the software NI-visa 5.2 has been successfully installed.
Could anyone helps me with that? thanks!
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and here is my program:

Hi
there is no error occur when i use visa function. I plan to use two wireless serial port to commuicate. One is on microcontroller one is on laptop. For the testing whether they could work. I use two wireless ports to plug into USB on the laptop. One port is to write the string another is to read the string. The instrument is called "Silicon Labs CP210x USB to UART Bridge" in the hardware manager.
This is my program running like this:
also I try the basic VISA read/write examples to test. But it is still not work and report error. This is example runing basic visa read/write:
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Kun L

OBD1 ALDL communication with Labview VISA

Hello all,
I am new to serial communication with labview.
Task:
trying to send a command and receive data from a 1987 corvettes ECM using VISA serial block in labview.... and failing hard
Troubleshooting the problem:
Hardware: works with EFI live V4 (software that communicates with cars), send and receives data all day long, so my hardware is not the problem
software: it is something i am doing wrong in my coding
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37:30.137: Send: $80,$57,$01,$00,$28
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37:30.241: Finished reading frame
Example code protocol i tryed into the visa block in labview:
$80,$57,$01,$00,$28
$80,$57,$01,$00,$28\n
$80,$57,$01,$00,$28\r\n
$80$57$01$00$28
$80$57$01$00$28\n
$80$57$01$00$28\r\n
80 57 01 00 28
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80 57 01 00 28\r\n
8057010028
8057010028\n
8057010028\r\n
VISA read Result:
i just get an eco back of the same command i sent
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is there something simple i am missing in the command protocol or a possible setting i am overlooking?
also what is the purpose of the “$” in the Hex command?
background info:
vehicle : 1987 corvette
ECM type: 16198259
com. protocol : ALDL OBD1
labview v8.5
baud rate: 8192
data: 8 bit
parity: none
stop: 1
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Are you actually supposed to be sending hex? You need details on the actual format of the data. I don't think viewing the output of some other program will tell you what is truly being sent and received unless its a sniffer such as portmon.
You can right click on the string control and select hex display. You also did not include the actual VI so no one knows if you have it set to send \r and \n correctly.

Labview VISA Flush I/O Buffer, how can they be used?

I need to flush the i/o serial buffer and the VISA Flush I/O Buffer or
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How can they be used? I can't find any examples.
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Regards
kas

Do you mean what value to wire to the mask?
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VISA Flush I/O Buffer
Flushes the I/O buffer specified by mask.
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Mask Values
Hex Codes
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16
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64
0x40
Flushes and discards contents of the receive buffer.
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Labview VIs for HP 35670A

The link to the labview VIs for the HP 35670A is no longer valid and the search for the same returns nothing. Does anyone have the Labview VIs for that instrument?
The last post was back in 2004(see below)
The instrument driver for the HP 35670A is only
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The instrument
driver for the HP 35670A can be found on our web site at
http://zone.ni.com/idnet97.nsf/9b2b33e1993d877786256436006ec498/61f1c707c2f10906862568ab005fb9ff?Ope...
Solved!
Go to Solution.

Why don't you go to the Instrument Driver Network? I don't know what kind of search you did but the driver is certainly still available and can be found by using the search option there.

How to read and write data from Excel to TestStand without using LabVIEW VIs

Hi,
How can I read in columns of data from Excel into a TestStand array and write columns of data to Excel from TestStand without using LabVIEW VIs?
I don't think the Property Loader custom step type in TestStand will work because the data I would like to read in from Excel is in a column that is thousands of rows long and the data has to be in the proper format to use the Property Loader to load in an array from Excel.
Thanks for your help.

That example does not use LabVIEW and it does about 40% of what you need to do by calling Excel through ActiveX. If you don't know how to use Excel through ActiveX then you'll need to brush up on that.
http://www.microsoft.com/en-us/download/details.aspx?id=16250
http://support.microsoft.com/kb/141759
http://support.microsoft.com/kb/302084
CTA, CLA, MTFBWY

"Arduino TTL serial to Windows (LabVIEW VISA)"

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