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.

Similar Messages

There is a problem communicating with the printer.

I have a Lexmark Interpret S405. I am using a MBP laptop with WiFi, running 10.5.8. I have a cabled (non-wifi) Linsys router. I am using an Airport Express.
I was finally able to get the WiFi light on the Lexmark to be static green after reinstalling the Lexmark WiFi setup and reconfiguring my Airport settings so that both the computer and printer see each other.
In fact, I even updated the driver from Lexmark's Web site last night and I watched the WiFi light on the printer blink green indicating that the installation of the driver update was being communicated to the printer.
However, when I print, it opens the print window and says first "Looking for S300-S400", then it says "Printer is now online". Then after about 10 seconds, I get this error: "There is a problem communicating with the printer. Make sure the printer is powered on and connected to the computer. Delete or hold the job and try again."
I've exhausted Lexmark's technical databases and couldn't find the answer here.
I've read that one possible solution was to delete all the printers from the "Print & Fax" system preferences window and re-add. That didn't work.
Lexmark says for: The printer communicating on a network; however, the printer is not responsive. Possible causes could be:
1. Your printer is associated with a network, router, or access point, but it is not your network.
2. A software process is blocked by a system security firewall preventing network communication.
3. You are logged into Virtual Private Network (VPN).
4. You are connected to a network but have decided to switch to a USB connection.
I don't have a VPN and have removed the USB cable, then restarted both printer and computer, and deleted printers in Sys Prefs, restarted, and still no solution.
I can print directly via USB cable, but want to print wirelessly.
Lexmark also says to enter my PIN (which I have pulled out from the print menu screen on the printer) in the System. That tells me a lot...
Network settings on the print window on the printer also tell me Signal strength is 5 (excellent) and that I am on the network my airport is on.
Message was edited by: Macman17

I bet this is too late but...
Are you trying to print through the airport express wirelessly or the built in wireless of the lexmark? If you want to use the airport express, there is no need to mess with the wireless printing on the lexmark at all. The airport express will be easy to set up, all the wireless setups through the printers are a pain.

My iPad is no longer communicating with my printer

My iPad is no longer communicating with my printer. I get a message that it is contacting printer and then eventually it tells me that my printer is off line but it's not.

First, follow these steps:
Turn off internet modem (DSL)
Turn off wireless router
Turn off printer
Turn off iPad
WAIT THREE MINUTES BEFORE TURNING THEM ON
Turn on previous items in the EXACT order they were turned off
Allow Third Party Access
After the rebooting, go into your computer or printer's network connection, and make sure that third party devices have permission to have access to the printer.
If you're having problems after that, I deduct that the problem is not with the iPad, but with the printer itself.
Is the printer connected to Wi-Fi? Or, is the printer directly linked to your wireless router?
In the event that the printer IS connected to Wi-Fi, either refer to the user's manual that came with it, contact customer service, or let me know below!
In the event that the printer IS NOT connected to Wi-Fi but to a wireless router, resort to the following steps:
Check the (ethrnet) cable linking your printer and wireless router for any damage.
Make sure the ethernet cable is connected.
Check the wireless router's lights. The cable that was plugged in should have a matching light that turns on and off when plugged in, and removed.
If the light is off, try plugging the ethernet cable into a different port. Repeat this step until a light turns on.
If none of the port lights turn on, your wireless router is the problem.
If the port light does turn on, a connection between the printer and router is established.
Try to connect your device and the printer again.
After following these steps, and it's still not working, post another comment and let me know! My life is now dedicated to helping you get your iPad and printer connected!
-Johnjohn

Parallel port communication error with new addresses

MD2 motors controlled by LabVIEW. I am trying to communicate with the motors through a parallel port. I plug in a PCI card which can provide another two parallel ports. I check their addresses which are 1110-1117 and 1120-1127. Then I replaced the old addresses (378), but could not communicate any more, neither writing nor reading. The parallel port setting in BIOS is bi-directional, since both writing and reading are necessary. Does this matter?
I really have no clue why or how this could happen. Any help appreciated.

Hai,
I have installed a additional parallel port card (in pci slot) in my pc. Then i installed the device driver that came along with the parallel port card. I
checked out the base address it was 278H (but i dint look the address before installing the device driver). In general centronics interface ( parallel port) are placed at their respective addresses strictly. Try reinstalling the device driver that came along with the external parallel port card or try latest updates from the manufacturer if available.
of the card.
With best regards,
JK1
With regards,
JK
(Certified LabVIEW Developer)
Give Kudos for Good Answers, and Mark it a solution if your problem is solved.

Open port issues with Direct Print functionality

Hi, I have been fighting with HP call support about the Photosmart 7525 printer.
Originally I setup and had performed all the functions to enable both web support and WIFI.
Within an hour the printer would not respond to wireless communication, though it had its wireless indecator showing it was connected.
I was told by HP support that the issue will be resolved in March, as there will be a firmware update to fix the issue.
Now that I had the printer install the new firmware I still get the issue.
Though I found through some sniffing, that there are a number of ports enabled and open that are over and beyond print requirements.
Funny thing I can send my printer into instant lockup with all lights flashing with a simple UDP ping sniff. I would think I can do this with other new HP printers using Eprint functions. I will find HP web based printers that are open for public printing and test my theory that HP Eprinters are open to hacking and denyal of service attempts. My Hp print app on andriod list three in my area, and one is at my local Walmart. This would be cool to find this, as I am usually not the first to point such matters out.
I assume some are for Apple devices to print.
Here is my sniffing report:
Starting Nmap 6.40 ( http://nmap.org ) at 2014-03-21 07:57 Central Daylight TimeNSE: Loaded 110 scripts for scanning.NSE: Script Pre-scanning.Initiating ARP Ping Scan at 07:57Scanning 192.168.223.1 [1 port]Completed ARP Ping Scan at 07:57, 0.23s elapsed (1 total hosts)Initiating Parallel DNS resolution of 1 host. at 07:57Completed Parallel DNS resolution of 1 host. at 07:58, 16.50s elapsedInitiating SYN Stealth Scan at 07:58Scanning 192.168.223.1 [1000 ports]Discovered open port 445/tcp on 192.168.223.1Discovered open port 139/tcp on 192.168.223.1Discovered open port 80/tcp on 192.168.223.1Discovered open port 443/tcp on 192.168.223.1Discovered open port 8080/tcp on 192.168.223.1Discovered open port 9220/tcp on 192.168.223.1Discovered open port 6839/tcp on 192.168.223.1Discovered open port 631/tcp on 192.168.223.1Discovered open port 7435/tcp on 192.168.223.1Discovered open port 8089/tcp on 192.168.223.1Discovered open port 9100/tcp on 192.168.223.1Completed SYN Stealth Scan at 07:58, 1.71s elapsed (1000 total ports)Initiating UDP Scan at 07:58Scanning 192.168.223.1 [1000 ports]Discovered open port 5353/udp on 192.168.223.1Completed UDP Scan at 07:58, 1.82s elapsed (1000 total ports)Initiating Service scan at 07:58Scanning 20 services on 192.168.223.1Discovered open port 161/udp on 192.168.223.1Discovered open|filtered port 161/udp on 192.168.223.1 is actually open
Starting Nmap 6.40 ( http://nmap.org ) at 2014-03-21 07:51 Central Daylight TimeNmap scan report for 192.168.223.1Host is up (0.0025s latency).Not shown: 93 closed portsPORT     STATE SERVICE     VERSION80/tcp   open http        HP Photosmart 7520 series printer http config (Serial TH3AS711XZ05YZ)139/tcp open tcpwrapped443/tcp open ssl/http    HP Photosmart 7520 series printer http config (Serial TH3AS711XZ05YZ)445/tcp open netbios-ssn631/tcp open http        HP Photosmart 7520 series printer http config (Serial TH3AS711XZ05YZ)8080/tcp open http        HP Photosmart 7520 series printer http config (Serial TH3AS711XZ05YZ)9100/tcp open jetdirect?MAC Address: A03:C1:BD:C8:34 (Unknown)Device type: printer|general purposeRunning: HP embedded, Wind River VxWorksOS CPE: cpe:/h:hp:laserjet_cm1415fnw cpe:/h:hp:laserjet_cp1525nw cpe:/h:hp:laserjet_1536dnf cpe:/o:windriver:vxworksOS details: HP LaserJet CM1415fnw, CP1525nw, or 1536dnf printer, VxWorksNetwork Distance: 1 hopService Info: Device: printer; CPE: cpe:/h:hphotosmart_7520OS and Service detection performed. Please report any incorrect results at http://nmap.org/submit/ .Nmap done: 1 IP address (1 host up) scanned in 34.11 seconds

OK now I am able to run a full scan on TCP ports without causing a lock up of the printer.
I found that having the printer connect to a router that has been setup to use channel 5, 6 or 7 will cause port scanning issues with the printer.
It is obvious that there are 18 ports that are seen as open, whether they are used or not. Two of which are active but have no service connected to them. Some are just dead like port 25, but over half are active enough to recieve data and lock network connectivity within the printer.
As the firmware states some other laser jets may be affected depending on how the configuration can be set.
I moved my routers channel to channel 1 as it is the only other option I have in a highly congested location. It is not as good as channel 6, but the printer seems to have channel 6 locked in for direct printing.
Here is the latest full scan with UDP enabled, it is the furthest and most complete scan I am able to complete, with UDP ports enabled. The TCP port scan has a bit more and I have placed a simple list below the information given here:
Starting Nmap 6.40 ( http://nmap.org ) at 2014-03-21 13:27 Central Daylight Time
NSE: Loaded 110 scripts for scanning.
NSE: Script Pre-scanning.
Initiating ARP Ping Scan at 13:27
Scanning 192.168.1.211 [1 port]
Completed ARP Ping Scan at 13:27, 0.44s elapsed (1 total hosts)
Initiating Parallel DNS resolution of 1 host. at 13:27
Completed Parallel DNS resolution of 1 host. at 13:27, 0.03s elapsed
Initiating SYN Stealth Scan at 13:27
Scanning 192.168.1.211 [1000 ports]
Discovered open port 443/tcp on 192.168.1.211
Discovered open port 80/tcp on 192.168.1.211
Discovered open port 139/tcp on 192.168.1.211
Discovered open port 8080/tcp on 192.168.1.211
Discovered open port 445/tcp on 192.168.1.211
Discovered open port 631/tcp on 192.168.1.211
Discovered open port 9100/tcp on 192.168.1.211
Discovered open port 7435/tcp on 192.168.1.211
Discovered open port 9220/tcp on 192.168.1.211
Discovered open port 6839/tcp on 192.168.1.211
Completed SYN Stealth Scan at 13:27, 5.25s elapsed (1000 total ports)
Initiating UDP Scan at 13:27
Scanning 192.168.1.211 [1000 ports]
Discovered open port 137/udp on 192.168.1.211
Completed UDP Scan at 13:27, 4.46s elapsed (1000 total ports)
Initiating Service scan at 13:27
Scanning 16 services on 192.168.1.211
Discovered open port 161/udp on 192.168.1.211
Discovered open|filtered port 161/udp on 192.168.1.211 is actually open
Completed Service scan at 13:29, 82.51s elapsed (17 services on 1 host)
Initiating OS detection (try #1) against 192.168.1.211
NSE: Script scanning 192.168.1.211.
Initiating NSE at 13:29
Completed NSE at 13:30, 82.29s elapsed
Nmap scan report for 192.168.1.211
Host is up (0.023s latency).
Not shown: 1983 closed ports
PORT     STATE         SERVICE      VERSION
80/tcp   open          http         HP Photosmart 7520 series printer http config (Serial TH3AS711XZ05YZ)
|_http-favicon: Unknown favicon MD5: 76C6E492CB8CC73A2A50D62176F205C9
| http-methods: GET POST PUT DELETE
| Potentially risky methods: PUT DELETE
|_See http://nmap.org/nsedoc/scripts/http-methods.html
|_http-title: Site doesn't have a title (text/html).
139/tcp open          tcpwrapped
443/tcp open          ssl/http     HP Photosmart 7520 series printer http config (Serial TH3AS711XZ05YZ)
|_http-favicon: Unknown favicon MD5: 76C6E492CB8CC73A2A50D62176F205C9
| http-methods: GET POST PUT DELETE
| Potentially risky methods: PUT DELETE
|_See http://nmap.org/nsedoc/scripts/http-methods.html
|_http-title: Site doesn't have a title (text/html).
| ssl-cert: Subject: commonName=HPPS7525/organizationName=HP/stateOrProvinceName=Washington/countryName=US
| Issuer: commonName=HPPS7525/organizationName=HP/stateOrProvinceName=Washington/countryName=US
| Public Key type: rsa
| Public Key bits: 1024
| Not valid before: 2014-02-25T10:12:24+00:00
| Not valid after: 2034-02-20T10:12:24+00:00
| MD5:   9144 ca3b 557e 09cc aba0 8387 2732 2375
|_SHA-1: a6b2 95c0 b72a 7201 578c 32de 662a e6fe b082 48ca
|_ssl-date: 2014-03-21T13:30:09+00:00; -4h59m12s from local time.
445/tcp open          netbios-ssn
631/tcp open          http         HP Photosmart 7520 series printer http config (Serial TH3AS711XZ05YZ)
| http-methods: GET POST PUT DELETE
| Potentially risky methods: PUT DELETE
|_See http://nmap.org/nsedoc/scripts/http-methods.html
6839/tcp open          tcpwrapped
7435/tcp open          tcpwrapped
8080/tcp open          http         HP Photosmart 7520 series printer http config (Serial TH3AS711XZ05YZ)
|_http-favicon: Unknown favicon MD5: 76C6E492CB8CC73A2A50D62176F205C9
| http-methods: GET POST PUT DELETE
| Potentially risky methods: PUT DELETE
|_See http://nmap.org/nsedoc/scripts/http-methods.html
|_http-title: Site doesn't have a title (text/html).
9100/tcp open          jetdirect?
9220/tcp open          hp-gsg       HP Generic Scan Gateway 1.0
137/udp open          netbios-ns   Samba nmbd (workgroup: HPPS7525)
138/udp open|filtered netbios-dgm
161/udp open          snmp         SNMPv1 server (public)
| snmp-hh3c-logins:
|_ baseoid: 1.3.6.1.4.1.25506.2.12.1.1.1
| snmp-interfaces:
|   Wifi0
|     IP address: 192.168.1.211 Netmask: 255.255.255.0
|     MAC address: a0:d3:c1:bd:c8:32 (Unknown)
|     Type: ethernetCsmacd Speed: 10 Mbps
|     Status: up
|_    Traffic stats: 6.16 Mb sent, 3.43 Mb received
| snmp-netstat:
|   TCP 0.0.0.0:7435         0.0.0.0:0
|   TCP 192.168.1.211:56076 15.201.145.52:5222
|   UDP 0.0.0.0:3702         *:*
|   UDP 127.0.0.1:666        *:*
|_ UDP 192.168.223.1:67     *:*
| snmp-sysdescr: HP ETHERNET MULTI-ENVIRONMENT
|_ System uptime: 0 days, 3:34:23.28 (1286328 timeticks)
| snmp-win32-shares:
|_ baseoid: 1.3.6.1.4.1.77.1.2.27
1022/udp open|filtered exp2
1023/udp open|filtered unknown
3702/udp open|filtered ws-discovery
5355/udp open|filtered llmnr
MAC Address: A03:C1:BD:C8:32 (Unknown)
Device type: general purpose
Running: Wind River VxWorks
OS CPE: cpe:/o:windriver:vxworks
OS details: VxWorks
Uptime guess: 0.150 days (since Fri Mar 21 09:55:04 2014)
Network Distance: 1 hop
TCP Sequence Prediction: Difficulty=255 (Good luck!)
IP ID Sequence Generation: Busy server or unknown class
Service Info: Hosts: HPA0D3C1BDC832, HPPS7525; Device: printer; CPE: cpe:/h:hphotosmart_7520
Host script results:
| nbstat:
|   NetBIOS name: HPA0D3C1BDC832, NetBIOS user: <unknown>, NetBIOS MAC: <unknown>
|   Names
|     HPA0D3C1BDC832<00>   Flags: <unique><active><permanent>
|     MSHOME<00>           Flags: <group><active><permanent>
|     HPA0D3C1BDC832<20>   Flags: <unique><active><permanent>
|     HPPS7525<00>         Flags: <unique><active><permanent>
|_    HPPS7525<20>         Flags: <unique><active><permanent>
| smb-security-mode:
|   Account that was used for smb scripts: guest
|   User-level authentication
|   SMB Security: Challenge/response passwords supported
|_ Message signing disabled (dangerous, but default)
TRACEROUTE
HOP RTT      ADDRESS
1   23.26 ms 192.168.1.211
NSE: Script Post-scanning.
Read data files from: F:\Progs\Nmap
OS and Service detection performed. Please report any incorrect results at http://nmap.org/submit/ .
Nmap done: 1 IP address (1 host up) scanned in 180.90 seconds
           Raw packets sent: 2030 (74.829KB) | Rcvd: 2921 (149.377KB)
+++++++++++++++++++++++++++++++++++++++++++++++++++++===
Full TCP port scan without UDP scanning of all ports, showing up as open... * designates open and active.
192.168.223.1Discovered open port 25/tcp on
*192.168.223.1Discovered open port 80/tcp on
*192.168.223.1Discovered open port 110/tcp on
*192.168.223.1Discovered open port 119/tcp on
*192.168.223.1Discovered open port 139/tcp on
192.168.223.1Discovered open port 143/tcp on
*192.168.223.1Discovered open port 443/tcp on
*192.168.223.1Discovered open port 445/tcp on
192.168.223.1Discovered open port 465/tcp on
192.168.223.1Discovered open port 563/tcp on
192.168.223.1Discovered open port 587/tcp on
*192.168.223.1Discovered open port 631/tcp on
192.168.223.1Discovered open port 993/tcp on
192.168.223.1Discovered open port 995/tcp on
*192.168.223.1Discovered open port 7435/tcp on
*192.168.223.1Discovered open port 6839/tcp on
*192.168.223.1Discovered open port 8080/tcp on
192.168.223.1Discovered open port 8089/tcp on
*192.168.223.1Discovered open port 9100/tcp on
*192.168.223.1Discovered open port 9220/tcp on

Parallel port updating with labview

I have a project to do that I will need to control using the parallel port. The problem is that I will need to use more than one pin at a time. An example is, when I press button 1, data pin1 and data pin3 will send a signal, and when I press button 2, data pin2 and data pin4 will send s signal and data pin1 and 3 will stop.
I tried doing that but stopped at the programming stage.
I have attached the file I've just did, and I would be most grateful if you kindly pointed me on how to configure this problem.
note: am using win2000 and the parallel port is working fine and i've tried controlling things with it, to make the question more obvious, how could i control the 8 pins and update them as i like. i've read some articles
and answers but didn't understand well since am new to labview
Best regards,
Attachments:
semifinaltest.vi ‏39 KB

Hi,
find your vi with working parallel port (values should change). You have made a mistake - do not toggle byte/word, the paraport does not support 16bit. In addition I have attached a radio-button selection-vi; this should give an idea, how to select one of xx buttons; maybe the event structure could do the same job for your case. Unfortunately I don't have the time to deliver a complete solution for you....
Hope this helps already. If you have further questions about paraport - mail simply to my .web-address
You will find it by double-clicking on wha@atmel
regards
wha
Attachments:
semifinaltest.llb ‏46 KB
Simulating_Radio_Buttons.llb ‏47 KB

Parallel port read with a CIN

I need to read the status of a pin of the parallel port from within a Labview CIN.
I intend to use this as a trigger for multiple camera acquisitions, and going back to Labview to read this value would not be fast enough.
I know that under windows XP I need to "unlock" access to this port. I used a set of functions called "winio" to do this. This works fine from a regular C program, but won't work from within a CIN. Does Labview lock the use of the parallel port in any way?
Does anyone know what I should do ?
Thanks.

Tchill wrote:
Does Labview lock the use of the parallel port in any way?
Does anyone know what I should do ?
Thanks.
Hi Tchill,
I can't remember Win-XP causing trouble with the parallel port. But I do know about the security feature which does not allow to change the parallel port IO addressing (that's another topic )
If you are running LV7.0, you can do a search example on parallel port. There are a couple of very useful vi's that you can run right away and it should get you going.
You can also check this thread.
or more directly into the developer zone for a tutorial by clicking HERE.
JLV

Unable to establish two-way communication with the printer

I have a HP Photosmart B8550 large format printer, but failed recently to print the whole page, but only one third of the page. The OS is Window 7 in my commuter. I downloaded the driver from HP website, but it is not working. The result of the failure is "The computer is unable to establish two-way communication with the device." One of the reasons I guess is that I failed to register my printer because I had no way to finish the registration, because there is no further process even if I put my printer name or number into the required block. Anyhow I failed recently to print anything in the printer. I am seeking the support after a lot of tries. Thanks.

I have two HP computers and two HP Photosmart B8550 printers. A month ago printers were not working. I tried in vain in two computers to download new HP software and driver from internet and got the HP Solution for install error - Windows 7. Based on this Solution on desk, I tried many many times to follow every step, but the result is the same: Fatal error during the installation.
By using other tools like HP Printer Diagnostic Tools, HP Print and Scan Doctor, I failed too because the diagosis or the choices are not accuate. For example, the printer is disconnected. It is wrong even if I changed ports and USB calbe again and again. The control panet can prove that there is communication, but the printer cannot work as directed. There is no way to test the printing as Doctor requested, saying the computer is unable to establish two-way communication with the device, which is not helpful to go ahead with the solution. There is no way to register the printer because there is no such a model HP Photosmart B8550 in its list after search.
It is even worse that the new window dialogue asked me to find HP Photosmart Essentials in my computer to install it again and again, and I could not concel the request whenever I open my computer.
I guess the HP printer software and driver has something wrong in its root design, which leads me to failure in installation so that the computer could not recognize my printer. In short, the new HP software and driver makes my printer not functional.
By the way, my two printers can work internally in printing sample paper and report and two computer are working in perfect condition.

Parallel Port Communication

any one can tell me how to change the mode of parallel port from " out put only" to input....

Apparently so (I don't have access to solaris at the
moment but looking around the net it would appear
that
a mode change is possible in solaris.
Try using the rxtx library
http://www.rxtx.org/
It apparently supports Windows now. It provides a
commapi interface and it may provide more
functionality
then suns commapi implementation. (although I would
not hold my breath)
There are also a few comercial vendors of commapi
complient libraries out there but they appear to have
problems with parallel ports also. One suggestion is
to buy a cheap serial to parallel port adapter and
use that (nasty hack though).
matfudThank so much for help. I will try to use the rxtx library and I'll inform you about it.
Further, I agree with you regarding the use of a serial/parallel adapter, it seems a last solution.
marco

USB to Parallel Port connector plug for printer

Hi
I'm trying to get an old IBM laster printer (4019) to work with an ibook G4--I have downloaded the Gutenprint driver which is supposedly compatable but now I need advice on adapting cables for printers. I was going to buy a Sabrent USB to Parallel port connector but saw in the feedback that many people weer unhappy with it. Could somebody suggest the best USB to Parallel port connecting cable for me and where to order it? thanks very much.

Hi Derek,
maybe this is a better one: http://www.keyspan.com/products/usb/up6c/homepage.spml
I don't have any need for this, so I can't provide any review of it.
Regards
Stefan

PC parallel port access with XP

I recently got In Port and Out Port working on XP.
I searched the ni site for AccessHW. The CVI Run Time Engine has to be
version 5.510 or earlier. I checked the version number of one file, i.e.
cvirte.dll to verify.
I directed the installer to install accesshw to the directory where the new
In Port and Out Port and the rest of the new parallel port .vis were going
to be, i.e. Labview\Labview 6\vi.lib\platform.
I downloaded parallel.zip from ni.com and moved the parallelnt.llb file to
this same directory. Parallelnt.llb has a number of parallel port vis, not
just replacements for In Port and Out Port. I replaced the In Port.vi and
Out Port.vis in the diagrams I was trying to make work with the new .vis.
So, on this XP machine, with
a monitor program, parmon.exe, running to
display the bits on the parallel port, Labview can be seen to be using the
new parallel port .vis, and, bits on the port are changing.

I wonder if there's a reason why there's a javax.comm 3 series for *nix, but not for windows. Hmmm.

Recently got LR,and am having trouble communicating with my printer. Photos come out 1/2 bleached. Printer checked out ok. What can I do?

Recently got LR, and am having trouble with my printer. I get "communication error" messages.Photos come out 1/2 bleached. My Epson R1900 checks out fine. What can I do?

domh2010 wrote:
All of that did absolutely nothing. Actually it made things worse.
If you tried every possible solution in the all those links baltwo provided, there is nothing more anyone here can suggest other than waving a wand over the computer or you throwing salt over both shoulders.
Take the computer to an Apple store or an AASP. Whichever is more convenient for you. Let the geniuses there figure it out. Diagnostic testing is free.

About communication with finger print readers

hi all,
i am trying to communicate with finger print reader using swing and griaule api .
Its not responding. Can i know which api exaxtly i have to use for that.

Hi!
Search "biometrical" at oracle.com.

Can't install parallel port printers or use printer/scanner

I have two fully upgraded systems, each of which has a parallel device: an HP Laserjet 2100 printer; and an HP PSC 500 printer/scanner/copier. They "worked fine a while ago" (!), but when I try and reinstall them now (as root or user) via the KDE Control Center, I get this error message at the end of the installation:
Unable to create printer: Error message received from manager:
You don't have access to the requested resource
I also notice that under Add Printer / Local printer / Local System / Parallel it only shows 'LPT #1' and not the identifier of the actual device as expected.
I've checked that the devices can be installed and work as expected under the new Knoppix 5.3.1 and Absolute Linux 12.1 distros - and I can successfully scan using the HP PSC 500 too.
Had a look at many error reports in various forums, but these seemed the closest to home:
http://bugs.archlinux.org/task/9867
http://bbs.archlinux.org/viewtopic.php?id=45456
http://forums.suselinuxsupport.de/index … opic=66751
Tried adding lp, parport and parport_pc explicitly to my modules list in rc.conf but no luck. Also, 'dmesg|grep lp' reports:
lp: driver loaded but no devices found
Reinstalled my cups and hplip packages, and tried downgrading them too, to no avail.
This is doing my head in - any fixes most welcome!
Last edited by ninian (2008-05-26 10:05:59)

Mixed news - I have solved one problem only to discover another!
Here's how I managed to get KDE adding printers again:
# pacman -Rd cups libcups
# rm -r /etc/cups
# pacman -S cups libcups
But I find that I cannot scan reliably with the HP PSC 500, getting either a "busy" or "i/o error" message when running XSane; or else it usually loads with scan resolution = 0 instead of 75. But sometimes (say 10%) it works!
I also found the sane-troubleshoot program from http://www.meier-geinitz.de/sane/sts/ and it reports:
[hpaio] failed to open scan channel: scan/sane/hpaio.c 665
<-- sane_open (hpaio:/par/PSC_500?device=/dev/parport0): Device busy
- OR -
[hpaio] scl.compat1150=<5300A>: scan/sane/hpaio.c 1808
[hpaio] SclSendCommand: size=6 bytes_wrote=0: scan/sane/scl.c 199
[hpaio] [0000] 1B 2A 73 31 39 45 .*s19E
<-- sane_open (hpaio:/par/PSC_500?device=/dev/parport0): Error during device I/O
Also, I wonder whether this comment from http://www.xs4all.nl/~ljm/SANE-faq.html#43 is significant:
7.7. I'm using IDE over SCSI and I keep getting IO-error under xsane.
The IDE via SCSI driver seems to create problems. Please advise the mailing list.
Just checked again, and I can scan fine with the HP PSC 500, running from the Knoppix 5.3.1 live DVD.

I am trying to acquire pulse signal (TTL 0 ,+5v) using parallel port (SPP 25 pins) on pin 12.

The state register adress is 379h. When I run continuously this VI, the value diplays 78 and 58 periodycally.
I think that 0 correponds to 58 and +5v correponds 78. Is this correct ?
So my questions are:
1) How can I do to read only pin 12.
2) How can I do to display graph of a pulse signal (TTL 0 +5v) from value.
I attached the I am using.
Thank you in advance.

pin 12 is bit 5(32 decimal) of the byte you read from port 379h. So actually 58 is +5V and 78 is 0V.
in C:
if(32 & data){
/* pin 12 is high (+5V) */
} else {
/* pin 12 is low (0V) */
graphing depends on your programming language and tools available.
If your signal is slow enough, and you don't need very good accuarcy, use a software timer and get a measurement every x mS

RXTX Parallel port communication with Pin Printer

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