Using a serial port under j9.. How?

I am trying out j9 on an ipaq. I am trying to get javax.comm to work.
When I call CommPortIdentifier.getIdentifiers ();
I get java.lang.string.NoSuchMethodError: java/lang/String.<init>([BIII)V
It would appear that the javax.comm package was implemented using a now deprecated String method, and that IBM has chosen not to implement deprecated methods in it's j9 vm (I get the same issue trying to run swing.)
One would think that what is needed is an updated javax.comm package. However, there doesn't appear to be a javax.comm package on Sun's site, let alone an updated one. Whats going on here? Can someone give me an idea of how Sun and/or the JCP thinks about developers who want to use serial ports?
Is there a workaround? A different way of talking to a serial port? Or should I abandon j9? I should add that I got my software running just fine on nsi.com's creme vm (javax.comm and swing too) and it worked without any hassles. It even understands jar files (is there a reason why IBM insists on having a link file?). However, the reason I persevered was that a) j9 is cheaper and more importantly b) nsi.com don't seem terribly keen on actually selling their product. I have lots of references to them selling their vm in bundles of 40 ($1000) which is a bit ouchy but hey I'm not paying for it. But, you'd think the nsi.com people would actually confirm this on their site?
So.. can it be done? And why, in the world of embedded systems (my field) and now lots of phones and pdas, is so little attention given to the humble serial port? It doesn't matter how fancy the protocol is, underneath it all is a UART. grumble
-Russel

Hi Russel,
I will probably soon be in the position you are in trying to get this to work. I found the following page which offers some promise.
http://www.intrinsyc.com/support/I-Linux/405-cube/misc/smf_serial_port_access_example.htm
Mike

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Sending an ESC code using the serial port

I have a motor control aplication that requires sending an ESC character using the serial port. LabView has several built-in functions (end of line, line return, etc.) but I just do not know how to send this particular code using the serial port. Any ideas?

The hex code for ESC character is 1b, Try writing it in a 8 bit unsigned number and then change that byte to charachter using labview function "byte Array to string". In this way you can pass this charachter.

I can not communicate with the FP-1000, using the serial port.

FP-100 communication by serial port.
My problem is the communication with the interface FP-1000, I haven been using it for two month with my program application and suddenly it stopped to work. I tried to use the FieldPoint Explorer to communicate using its last configuration but it does not work. I have tried to configure again and the FieldPoint Explorer doe not find any module, also I have seen that the network and access LEDs don lit when I am trying to communicate with the FP-1000.
I have checked all connection and they are already, the FP-1000 turn on, and the status LEDs does not lit.
I guess the trouble is the RS-323 connector at the FP-1000.
Could you tell how can I solve this problem?

Hello,
There are a number of things that you can try when you are experiencing communication problems with a FP-1000.
First, double-check that the serial port that you are using is the same one that you are specifying in FieldPoint Explorer. Try using another serial port on the host computer. Try connecting the FP-1000 to another computer.
Make sure that you have FieldPoint Explorer version 3.0.2 or later. Free upgrades are available from the web.
I hope this helps,
Chad Evans

I would like to put Dreamweaver 8 on a new computer. There is no "deactivate" function and the technical support person I chatted with recommended I come here. Can I just use the serial number again? How can I deactive? Has anyone else run into this?

There is no "deactivate" function and the technical support person I chatted with recommended I come here. Can I just use the serial number again? How can I deactive? Has anyone else run into this? How can I get Dreamweaver 8, which is no longer being activated by Adobe, on a new computer? Is it even worth doing or do I need to get a new version. What are the killer features I'm missing?

If you manage to get it installed on your current OS, don't forget to install the 8.02 update.
Adobe - Dreamweaver Support Center : Updaters
Nancy O.

How to use the serial port

hello
I would like to know if there is other library than comm to use to establish communication with the serial port ..
can we do this with pure java ,I mean without the need of using any library ???
if not then what is the best library to use ???
any examples ??
I have other question
when i use the library comm
I use the public void serialEvent(SerialPortEvent event) to get my data
but that data comme line by line
is there a way to get all the data at once ???
than kyou in advance

There you go
http://java.sun.com/products/javacomm/
Some extra resources
http://www.google.co.in/search?q=java+access+serial+po
rt&start=0&ie=utf-8&oe=utf-8&client=firefox-a&rls=org.
mozilla:en-US:officialmaybe I was not clear ,I know the comm lib
Im already using it
but am asking if there any other lib that will work for windows
thank you

Keyboard on serial port under Solaris 8

I've hooked a special keyboard into the serial port (/dev/ttya), and am trying to read from and write to it. I enable the port via "admintool" (with "initialize only - no connection" and only "software carrier" checked under options, and then set my port parameters via "stty" as needed. Then I can start up my C program to read/write to the keyboard. This works for a moment, but then "ttymon" seems to reset the port or something, which changes the port parameters and screws up my program. If I disable the port via "admintool", which kills "ttymon", then I can't set the port parameters as needed and run. I can enable the port, set the parameters, and then kill "ttymon", and then run my driver. This seems to work, but doesn't seem like the correct way to go about doing things. So what do I need to do? Any help would be appreciated. Thanks. Don

Hi donernsdorff,
You can disable ttya been monitored by ttymon and see if that helps. You can use pmadm command (Pls see man pages for details) to disable or change the port monitor settings. Hope this helps. Thanks. SUN/DTS

Using a serial port via kermit and a USB adapter

I have need to use a USB->Serial adapter for connecting to console ports (Firewalls, etc). I bought a nice Keyspan adapter for this.
First, I've not been able to find a version of kermit that will work on Snow Leopard. Anyone have an updated version?
Second, which device do we use for "set port /dev/ttyXXX" ? Is there some novel way that the system tells you which tty is mapped to which port?
I'm sure there must be more to it... there is a disc with these USB devices for OS X (though I'm not sure they'll work in Snow Leopard).
Thanks!

Take a look at GoSerial http://www.furrysoft.de/?page=goserial it configures the port and acts as a terminal. There is also the screen command in the terminal, and minicom you can get though macports.

Can't use ch340g serial port driver since upgrading to Yosemite on MacBook air

I use my MacBook air with the Arduino 1.0.6 IDE. Since upgrading ( free upgrade) to Yosemite. I can no longer acess the ch340g serial port. (does not show up in arduino ide). I tried re-installing the driver. I get no errors and am told the install was successful. This was working very nicely before the upgrade. I now have three boards I cannot use. I am at a loss as to what I should do. I suppose I could go back to Maverick but then I would have to go buy the operating system. This seems wrong to me. I was offered an upgrade that then leaves me up the creek without a paddle. Any help given would be highly appreciated.

I have the same problem, a non stable CM341 serial to tty driver on Yosemity on a MacbookPro Retina.
I followed the advice of Rsattaur, I executed the command: sudo nvram boot-args="kext-dev-mode=1" and now I have big problems with my USB-ports.
The result is a screen-of-death after connecting anything to my USB-ports!!!!
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Using USB Printer on Beige G3 with Localtalk/Serial Port - How?

I have an Epson Stylus 740 which has both DIN 8/Serial port and USB connections, but the serial quit showing-up, so I want to connect via the USB connector. Is this possible?
Is there an adapter from DIN 8 Serial/Localtalk connector on Beige G3 to USB for Printer?
Or do I need to buy a PCI to USB card?
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thanks

Russo:
If you tried to connect an adaptor to the serial port that had a USB connector on the end, it probably won't work since the serial port isn't currently working. You'd need a USB PCI card to connect to the USB.
I have this same printer, originally used the serial port and then switched to USB when I got the PCI card. This has worked great.
You should see if something got turned off. Look at these:
Under the Apple Menu>Control Panel > AppleTalk - make sure the printer port is selected
Under Apple Menu>Control Panel > Remote Access > Modem (from the drop down menu) - make sure that the printer port isn't selected
Under Apple Menu > Control Panel > USB Printer sharing - make sure that is turned OFF.
You might also have to install drivers for the Epson from the disk that came with it. If you insert the CD and choose "custom install" you'll get another screen that allows you to choose the serial driver package.
Post back if you get it working (or don't).
HTH.
A

Problems with access to serial port using reentrant code

Hi,
I have a VI that send commands and receive answers from an instrument using
de serial port.
This VI runs perfectly when used alone.
However I'm trying run two instances of that VI simultaneously using
reentrant code and I'm facing some problems.
Sometimes everything is OK but sometimes, in the process of writing to
serial port the following error happen:
Error code 36.
Invalid refnum device.
What is this?
Does someone know how to prevent this?
Thanks in advance for any help.

"Paro, Paula [CMPS:2721:EXCH]" wrote:
>
> Hi,
>
> I have a VI that send commands and receive answers from an instrument using
> de serial port.
> This VI runs perfectly when used alone.
> However I'm trying run two instances of that VI simultaneously using
> reentrant code and I'm facing some problems.
> Sometimes everything is OK but sometimes, in the process of writing to
> serial port the following error happen:
> Error code 36.
> Invalid refnum device.
>
> What is this?
> Does someone know how to prevent this?
>
> Thanks in advance for any help.
You can't use reentrant vi's vith serial vi calls without supervising of
driver.
Use VISA instead and you have to control the VISA session opening and
closing. Another word is that the only one serial port sess
ion should be
opened at a time.
Reentrant vi's for serial port without checking serial port session is a
mistake of program algorithm. Change it in any convenient way.
Sergey Krasnishov
Automated Control Systems
National Instruments Alliance Member
Moscow, Russia
[email protected]
http://acs.levsha.ru

Serial ports crash on cFP-2010 using LVRT 6.1.1 and 6.1.3

I have LabVIEW RT 6.1 and cFP-2010. I am trying to write an embedded VI that will communicate with some external hardware through the serial ports, but I am not able to get the serial ports to work. Because I do not have LV7 I cannot use the VISA VIs for serial communication. I am using the old serial compatibility VIs. When it tries to configure a port (port 0 or 1) it sometimes says Error 37 but usually it just reboots the cFP module. I've tried writing new VIs from scratch and I've tried running old VIs that I had written for FP-2000 that uses the serial port, neither works. Can anybody help?

I have used the serial ports in LV 6.1 without trouble.
I would suggest you contact NI for a possible replacement of your cFP-2010. It sounds like it has a bad serial port.
Ben
Ben Rayner
I am currently active on.. MainStream Preppers
Rayner's Ridge is under construction

How can I control a HP 33120A waveform generator with the serial port of my PC?

Hello,
I want to control a HP 33120A waveform generator with my PC using the serial port. I don't have any idea about how to do it. If you've done it or if you know how I can do it, please give me some indications.
Thanks
Jean-Baptiste Paillet
PS: I don`t have G PIB port

The answer to your cross-post in the LabVIEW General group seems to be right on the money:
http://exchange.ni.com/servlet/ProcessRequest?RHIVEID=101&RPAGEID=135&HOID=50650000000800000032200000&UCATEGORY_0=_49_%24_6_&UCATEGORY_S=0
Regards,
John Lum
National Instruments

Using Serial Port for Non-Serial Data Acquisiton

I searched the forums and couldn't find anything related to this topic.
I saw that it was possible to use the parallel port for simple digital I/O and I was hoping the serial port can be configured the same. It seems all the VISA VI's only want to use the serial port to recieve ASCII chars at a given baud rate, but is it possible to simply poll the status of the serial line at my own speed to see if it is high or low, kind of like a single pin DAQ?
It seems it would be possible as long as the serial data is read and controlled by labview and not by Windows. Let me know if you have any ideas how to approach this problem, or any feedback as to why it is not possible.
Thanks everyone!
Solved!
Go to Solution.

Select Property>Serial Settings>Modem Line Settings. For example, the CTS State is an input to the pc.
Using these lines is a very poor replacement for a scope or DAQ board. The only things you can get back is Asserted, Unasserted, or Unknown. The range of acceptable signals is quite large. Anything between +3 and -3 is an unknown state. Your other signals are +/3 to 15 volts. what kind of signals do you actually want to capture?
edit: There is no such thing as VISA Status so I have no idea what you are actually using.
Message Edited by Dennis Knutson on 07-20-2009 11:09 AM

How can i delay the line and charactor rate of my serial port transmision?

In hyperterminal I can pick the line and charactor rate , but I can't seem to slow down the rate when using the serial port by itself.
Attachments:
remod_chan_4.txt ‏1 KB
serial_INT_chan3.vi ‏31 KB
read_text_file.vi ‏20 KB

There's nothing built into the VISA or old serial functions but it's pretty simple to program yourself. Here's a VI for specifying a delay between characters. It uses VISA but you can easily swap that out with the old serial write if you want. It just breaks out the text string character by character and adds a delay before each character is written. To add a line delay, just add another delay after the entire string is written.
Attachments:
Serial_Write_With_InterCharacter_Delay.vi ‏45 KB

Error 37 using serial port with an executable file

Hi all,
I have developed a VI that controls a setellite receiver using RS232
serial port (LabVIEW 5.1.1).
The VI program run properly, but when I compile it and try to run the
executable file I receive an "Error 37, Device not found" error message.
I have already put serpdrv and my_file.ini files in the same directory
of my executable program my_file.exe, but I have not been able to solve
the problem.
Any help greatly appreciated.
Regards
Antonio
Sent via Deja.com http://www.deja.com/
Before you buy.

[email protected] wrote:
>
> Hi all,
> I have developed a VI that controls a setellite receiver using RS232
> serial port (LabVIEW 5.1.1).
> The VI program run properly, but when I compile it and try to run the
> executable file I receive an "Error 37, Device not found" error message.
> I have already put serpdrv and my_file.ini files in the same directory
> of my executable program my_file.exe, but I have not been able to solve
> the problem.
> Any help greatly appreciated.
>
> Regards
>
> Antonio
>
> Sent via Deja.com http://www.deja.com/
> Before you buy.
Maybe you used the serpdrv from an older version of LV
Regards, Roland
Roland Lampka - Nortel Dasa - ESN 565-7257 - FAX 8160

Using a serial port under j9.. How?

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