I was unable to establish a serial communication using a DLL library file

i had designed a VI application in Labview7.1, now i had upgraded Labview to 8.5 but my application is not responding. The design includes
Application: I am trying to access a third party controller, through serial communication(RS232 Cable). I am configuring the serial port using a third party DLL library file using call library function block. but i cannot get the starting reciever response.

hi santosh,
                   i cant get u, How do i check whether the dll is activex dll or not. else i do have an activex dll. Mouse, keyboard are USB connected. no other serial communication is connected to it. I am geting 2 errors when i tried to register the file
                     1. DLL server point not found          --    sometimes
                     2. The module was not found        -- sometimes
              One more thing is i am able to get the reciever status for the first time but was unable to connect for the consequtive bit/byte loadings. to the third party controller connected at the other end.

Similar Messages

Digital Fax to Folder Setup gives error message unable to establish 2-way communication with device

Digital Fax to Folder Setup gives error message unable to establish 2-way communication with device. I can s end a Fax and I can print documents. I can also, now, scan to computer. I have changed the phone line twice, restarted the router, restarted the computer, and made sure the front panel was lit when setting up the Digital Fax folder. I am on a Homegroup network, with both wireles and ethernet computers. When I view the network, it sees both computers (wireless laptop and enthernet desktop), the printer, scanner, and router (VerizonDrive). I recently had to reinstall Windows 7, where Digital Fax to Folder Setup previously worked, and now it doesn't. The network shows up as Network 3. When I try to view the network map, I get the error message that Windows cannot create the network map. Responses from other devices on the network are delayed or there is an incompatible router on the network. What am I doing wrong?

Hello @JiffyFingers and Good Afternoon
From what you have described, and from the work you did on another thread, I believe you'd get better assistance talking to either Microsoft or your router manufacturer. With not being able to create the network map, that's something a bit more intricate than digital fax setup
You can have a look at this Windows cannot create the network map. Responses from other devices on the network are delayed or th... Microsoft thread as well, and you may be able to figure it out from there.
Hope that helps, have a great day!
Please click “Accept as Solution ” if you feel my post resolved your issue, as it will help others find the solution faster
Click the “Kudos Thumbs Up" on the right to say “Thanks” for helping!
**MissTeriLynn**
I work on behalf of HP

Computer unable to establish two-way communication to J4580 through Airport Extreme

I have my J4580 connected to an Airport Extreme base station via usb. I've installed the printer software on my HP laptop (Vista) and Bonjour recognizes the printer as networked & installed, but when I try to print, i receive an error message "Computer is unable to establish two-way communication with the device" and the printer queue shows an error. I've attempted to find a solution through the posts, but haven't seen much that seems to apply to J4580. Any help??? Thanks!

I came across this similar problem and spent days trying to figure it out. I knew I was close when I tried to start the HPZ12
service and it kept failing with "unable to find the specified file". I traced it with a process monitor and found that it was looking
for a registry key that was not present. Specifically:
HKLM\System\CurrentCosntrolSet\Services\Pml Driver HPZ12\Parameters
It was looking for the string:
ServiceDLL which should be set to:
C:\WINDOWS\system32\HPZipm12.dll (or something similar)
The unfortunate thing is that no matter how many times you install and uninstall the HP drivers, then don't reset the registry keys
for the HPZ12 service. In the end, I ended up doing the following:
1. Uninstall software and reboot
2. Go through registry editor and delete the PML key (just did a search for all PML occurences)
3. Deleted the c:\program files\Hewlett-Packard directory
4. Deleted the c:\program files\HP directory
5. Deleted the c:\windows\system32\spool\drivers\w32x86\ contents (anything that referred to an HP printer or driver)
6. Deleted the HKLM\Software\Hewlett-Packard registry key
7. Rebooted
8. Reinstalled and everything worked.
I suggest you backup any registry keys prior to deleting them in case you make a mistake. You can use the Export feature on
the right-click context menu to save each key you delete, or use some tool to make a backup of your registry prior to making
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I reinstalled operating system software on my MacBook Air (Yosemite 10.10.3) and tried reinstalling Adobe Acrobat 9 Pro. I was able to install the software into my Applications folder but I was unable to enter the serial number or go any further with the

I reinstalled operating system software on my MacBook Air (Yosemite 10.10.3) and tried reinstalling Adobe Acrobat 9 Pro. I was able to install the software into my Applications folder but I was unable to enter the serial number or go any further with the installation. When I click on the Adobe Acrobat icon in the Applications folder, nothing happens.

Hi Tom,
kindly check the System requirements | Acrobat family of products—older versions (XI, X, 9)
For serial number message try:
Error "Invalid serial number" | Acrobat 9 | CS4
Thanks,
Atul Saini

BEA-149505 -The administration server was unable to establish JMX Connect.

hello
Getting the following error, trying to access the weblogic admin server ( Linux x86-64 RHL50) after a fresh install.
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I will like to add that the node manager and the cluster screen were NOT configured during the configuration, since this is NOT an OIM configuration
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faisal
thank for your feedback. I added this in my startup script, but I was NOT able to get the web access to work and when I shot it down, there was an error.
Here is the startup script, Please show me when to place the scripts
#!/bin/sh
# WARNING: This file is created by the Configuration Wizard.
# Any changes to this script may be lost when adding extensions to this configuration.
# --- Start Functions ---
stopAll()
# We separate the stop commands into a function so we are able to use the trap command in Unix (calling a function) to stop these services
if [ "X${ALREADY_STOPPED}" != "X" ] ; then
exit
fi
# STOP DERBY (only if we started it)
if [ "${DERBY_FLAG}" = "true" ] ; then
echo "Stopping Derby server..."
${WL_HOME}/common/derby/bin/stopNetworkServer.sh >"${DOMAIN_HOME}/derbyShutdown.log" 2>&1
echo "Derby server stopped."
fi
ALREADY_STOPPED="true"
# --- End Functions ---
# This script is used to start WebLogic Server for this domain.
# To create your own start script for your domain, you can initialize the
# environment by calling @USERDOMAINHOME/setDomainEnv.
# setDomainEnv initializes or calls commEnv to initialize the following variables:
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# JAVA_HOME - Location of the version of Java used to start WebLogic
# Server.
# JAVA_VENDOR - Vendor of the JVM (i.e. BEA, HP, IBM, Sun, etc.)
# PATH - JDK and WebLogic directories are added to system path.
# WEBLOGIC_CLASSPATH
# - Classpath needed to start WebLogic Server.
# PATCH_CLASSPATH - Classpath used for patches
# PATCH_LIBPATH - Library path used for patches
# PATCH_PATH - Path used for patches
# WEBLOGIC_EXTENSION_DIRS - Extension dirs for WebLogic classpath patch
"/erasdevapp/weblogic/user_projects/domains/base_domain/bin/startWebLogic
umask 037
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DOMAIN_HOME="/erasdevapp/weblogic/user_projects/domains/base_domain"
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SAVE_CLASSPATH="${CLASSPATH}"
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DERBY_DEBUG_LEVEL="0"
if [ "${DERBY_FLAG}" = "true" ] ; then
${WL_HOME}/common/derby/bin/startNetworkServer.sh >"${DOMAIN_HOME}/derby.log" 2>&1
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JAVA_OPTIONS="${SAVE_JAVA_OPTIONS}"
SAVE_JAVA_OPTIONS=""
CLASSPATH="${SAVE_CLASSPATH}"
SAVE_CLASSPATH=""
trap 'stopAll' 1 2 3 15
if [ "${PRODUCTION_MODE}" = "true" ] ; then
WLS_DISPLAY_MODE="Production"
WLS_DISPLAY_MODE="Production"
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WLS_DISPLAY_MODE="Development"
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if [ "${WLS_USER}" != "" ] ; then
JAVA_OPTIONS="${JAVA_OPTIONS} -Dweblogic.management.username=${WLS_USER}"
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JAVA_OPTIONS="${JAVA_OPTIONS} -Dweblogic.management.password=${WLS_PW}"
fi
if [ "${MEDREC_WEBLOGIC_CLASSPATH}" != "" ] ; then
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CLASSPATH="${CLASSPATH}${CLASSPATHSEP}${MEDREC_WEBLOGIC_CLASSPATH}"
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CLASSPATH="${MEDREC_WEBLOGIC_CLASSPATH}"
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echo "Class caching enabled..."
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echo "starting weblogic with Java version:"
${JAVA_HOME}/bin/java ${JAVA_VM} -version
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if [ "${doExitFlag}" = "true" ] ; then
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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.

SAPINST guiengine: login timeout; the client was unable to establish valid

sapinstGUI cannnot connect to sapinst.
Message :
guiengine: login timeout; the client was unable to establish a valid connection
The GUI with selectable install components never shows
Any idea?
I have been trying a lot of alternatives , and did quite some internet investigations, but to no avail.
Details :
WIN2003 SP1 with latest patches
All Firewalling turned off
sapinst 701 (as provided with Sol Mgr 4.0 ; ERP2005)
java 1.4.2.12. JAVA_HOME set to c:\j2sdk1.4.2_12 c:\j2sdk1.4.2_12\bin added to PATH
Step 1 : Start sapinst without GUI... it gives these messsages
SAPinst is getting started.
Please be patient ...
starting gui server process:
sapinstport: 21200
guiport : 21212
guistart : false
command : "c:\j2sdk1.4.2_12/bin\javaw.exe" -cp "C:/DOCUME1/ADMINI1/LOCALS1/Temp/sapinst_exe.2156.1168127928\jar\instgui.jar;C:/DOCUME1/ADMINI1/LOCALS1/Temp/sapinst_exe.2156.1168127928\jar\inqmyxml.jar" -Xmx256M -Dsun.java2d.noddraw=true SDTServer config=jar:sdtserver.xml guiport=21212 sapinsthost=localhost sapinstport=21200
load resource pool F:\51031659_11\DVD_4.0_SAP_Solution_Manager_Inst_Master\IM_WINDOWS_I386\resourcepool.xml
guiengine: no GUI connected; waiting for a connection on host amms, port 21200 to continue with the installation
netstat -a shows a.o. ....
Active Connections
Proto Local Address Foreign Address State
TCP amms:epmap amms:0 LISTENING
TCP amms:microsoft-ds amms:0 LISTENING
TCP amms:1026 amms:0 LISTENING
TCP amms:21200 amms:0 LISTENING
TCP amms:21212 amms:0 LISTENING
looks fine to me.
Step 2 : start startinstgui ...
messages in startinstgui window
Java Runtime found in JAVA_HOME environment variable
Path: c:\j2sdk1.4.2_12\bin\java.exe
Start mode: gui (GUI only)
Connection parameters:
GUIServer host: localhost
GUIServer port: 21212
Starting...
<<< frog.jar: version 5.4.5 10/19/05 sap.theme: null >>>
messages in sapinst window :
guiengine: login in process...............................
guiengine: login timeout; the client was unable to establish a valid connection
Exit status of child: 1
The startinstgui terminates.
netstat -a reveals no lines anymore for the ports.
NOTE... when I start sapinst with GUI then the same sequence of messages.
BUT even after the sapinst is terminated netstat -a shows
TCP amms:1230 amms:21212 ESTABLISHED
TCP amms:1231 amms:21200 ESTABLISHED
TCP amms:21200 amms:1231 ESTABLISHED
TCP amms:21212 amms:1230 ESTABLISHED
I cannot get rid of those and need to reboot.

Hi bart,
I'm wondering about the output of sapinst.exe -> "guistart : false"
When I'm starting sapinst.exe, I'll get following output:
SAPinst is getting started.
Please be patient ...
starting gui server process:
sapinstport: 21200
guiport : 21212
guistart : true
command : "C:\j2sdk1.4.2_12/bin\javaw.exe" -cp "C:/WINDOWS/TEMP/1/sapinst_exe.7184.1168268864\jar\instgui.jar;C:/WINDOWS/TEMP/1/sapinst_exe.7184.1168268864\jar\inqmyxml.jar" -Xmx256M -Dsun.java2d.noddraw=true SDTServer config=jar:sdtserver.xml guiport=21212 sapinsthost=localhost sapinstport=21200 guistart=true
load resource pool F:\inst\IM_WINDOWS_I386\resourcepool.xml
guiengine: no GUI connected; waiting for a connection on host sapphirbwp, port 21200 to continue with the installation
guiengine: login in process.
Try to run sapinst from command line with parameter SAPINST_START_GUI set to true
(e.g. sapinst "SAPINST_START_GUI=true").
With sapinst -p you will get all possible parameters of sapinst (often usefull e.g. if you need to change port and don't know how).
Regards
Daniel

TS1292 I rubbed the iTunes gift card back off, I was unable to read the serial number as part of it came off, can any one help.

I rubbed the iTunes gift card back off, I was unable to read the serial number as part of it came off, can any one help.

If the page that you posted from doesn't help then you will need to try contacting iTunes support (you will need to give them as much of the serial number and activation code from the card as you can read) : http://www.apple.com/support/itunes/contact/ - click on Contact iTunes Store Support on the right-hand side of the page, then iTunes Cards And Codes

RE:Serial communication using java

Hello,
First of all, I want to make clear thatI did not double post it as previously I posted it in Networking section..But I was told that I have not posted it at appropirate place....thats wht I am posting here.
I am a newbie in Java.I have started with Netbeans.I have designed a interface using Netbeans.It has 5 texboxes and two buttons named "Start" and "Stop".
I want to receive data from the serial port and display the data in text boxes.I want when I press Start button, then it should start listening to the serial port .If adat is present on serial port, then it must receive it and displayin the text boxes.when I press Stop button, then it should stop receiving data as well close connection.
can please anyone help me on this?
I would be highly thankful for this.
Regards,
Jass

Hello All,
I am using the javax.comm for serial communication using serial to usb converter at port COM4(I check using device manager.).Beside that I have also added the option in the programming to look into other COMs also.I have placed "comm.jar " and "javax.properties" into jdk\lib\ext and "win32.dll" into jdk\bin.
But I am getting the following output:
Wed Dec 24 02:23:43 EST 2008: COM4 null
Serial port List is javax.comm.CommPortEnumerator@1a46e30
Serial port ID is null
BUILD SUCCESSFUL (total time: 0 seconds)
The code Is as follows:
import java.io.*;
import java.util.logging.Level;
import java.util.logging.Logger;
import javax.comm.*;
import java.util.*;
public class serialport implements Runnable, SerialPortEventListener
    static CommPortIdentifier portId, portId1;
    public SerialPort serialPort;
    public OutputStream outputStream;
    public InputStream inputStream;
    Thread readThread;
    static Enumeration portList;
     static String TimeStamp;
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    {try {
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           portList = CommPortIdentifier.getPortIdentifiers();
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           portId = (CommPortIdentifier) portList.nextElement();
          System.out.println("Serial port ID is "+portId+"\n");
       while (portList.hasMoreElements()) {
          portId = (CommPortIdentifier) portList.nextElement();
          if (portId.getPortType() == CommPortIdentifier.PORT_SERIAL) {
            if (portId.getName().equals("COM3")) {
                 System.out.println("Serial port COM3 is found\n");
            serialport Port = new serialport();
            else if (portId.getName().equals("COM4")) {
                 System.out.println("Serial port COM4 is found\n");
            serialport Port = new serialport();
            else if (portId.getName().equals("COM6")) {
                 System.out.println("Serial port COM6 is found\n");
            serialport Port = new serialport();
            else if (portId.getName().equals("COM7")) {
                 System.out.println("Serial port COM7 is found\n");
            serialport Port = new serialport();
            else if (portId.getName().equals("COM5")) {
                 System.out.println("Serial port COM8 is found\n");
            serialport Port = new serialport();
public serialport()
    try {
      serialPort = (SerialPort) portId.open("MainClassApp", 2000);
    } catch (PortInUseException e) {
              System.out.println("Port is owned by another application \nor port cannot be opened\n");
    try {
      inputStream = serialPort.getInputStream();
    } catch (IOException e) {
         System.out.println("IOstream for port is not available\n");}
    try {
      serialPort.setSerialPortParams(9600, SerialPort.DATABITS_8, SerialPort.STOPBITS_1,SerialPort.PARITY_NONE);
    } catch (UnsupportedCommOperationException e) {
         System.out.println("Serial port is not properly configured\n");}
    try {
      serialPort.addEventListener(this);
    } catch (TooManyListenersException e) {
         e.printStackTrace();}
    serialPort.notifyOnDataAvailable(true);
    readThread = new Thread(this);
    readThread.start();
    public void run() {
       try {
         Thread.sleep(2000);
           } catch (InterruptedException e) {      e.printStackTrace();}
    public void serialEvent(SerialPortEvent event) {
         Runtime rt = Runtime.getRuntime() ;
         Process p;
    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:
      byte[] readBuffer = new byte[1];
      try {
        while (inputStream.available() > 0)
               int numBytes = inputStream.read(readBuffer);
               System.out.print(new String(readBuffer));
                break;
        System.out.print(new String(readBuffer));
            } catch (Exception e) {
           e.printStackTrace();}
      break;} } }Kindly help........I really wanna to know where is the error???
Thanks
Edited by: jass11 on Dec 23, 2008 11:39 PM
Edited by: jass11 on Dec 23, 2008 11:51 PM

Printer is unable to establish 2 way communication

My HP 4500 will not print as it tells me that it is unable to establish two way communication

Hello Mary1201,
Could you please mention the following details.
Operation System of the Computer to which the printer is connected
Connection Type - Is USB or Wireless Connection
Regards,
Jabzi
Was your question answered? Mark it as an Accepted Solution!
See a great post? Give it a Kudos!
Regards,
Jabzi
Give Kudos to say "thanks" by clicking on the "thumps Up icon" .
Click "Accept as Solution" if it solved your problem, so others can find it.
Although I am an HP employee, I am speaking for myself and not for HP.

Error message saying "unable to establish two-way communication with device"

I have an HP C309a printer/scanner/fax. I have recently reconfigured it to work wirelessly instead of via the USB cable, which it does. But if I try to go on to the HP Solution Centre/Settings/Printer Toobox to clean the printheads, it tells me that this cannot be done because "the computer cannot establish two-way communication with the device".
If I plug the USB cable back in, I can clean the printheads fine.
Does anyone have a way of allowing me to clean the printheads without using the USB cable?
roger

Hi rogercorke,
I believe you can also clean the printhead from the printer control screen. Press the Wrench button from the printer Home screen and then press Tools>Clean Printhead.
If you need to use this feature wirelessly, try running the HP network diagnostic utility on your wireless setup and see what it says: http://h10025.www1.hp.com/ewfrf/wc/softwareDownloadIndex?cc=us&lc=en&jumpid=ex_r4155/en/hho/ipg/foru...
Please click the blue Kudos star in the post that helped you.

Problems with Serial Communication using Labview 6 and Solaris 8

I am working on a Driver for a Temperature Controller. But I am stuck at the very basics. I am using Labview 6 and the platform is Solaris 8 on a SUN Ultra 60 Workstation. I can not get the Serial communication to work. When I am running raw (uncompiled) code it works (I can read from and write to ttya and ttyb) but once compiled I get error code 37 (device not found). I have tried the following steps to fix this with no luck.
1) I made sure that the "serpdrv" file is in the same folder with the executable. I also make sure the serpdrv file is added as a support file when building the app.
2) I changed from using traditional serial VI's to labview 6's new visa functions. With these "new" VI's when
I try to initiliaze the visa device and wire a control to the "visa reference" input only 1 serial port shows up (ASRL2, missing ASRL1). I am not sure if this is part of same problem or whole new issue.
3) I reinstalled both visa and labview 6.0.2 update hoping this would help with no luck
4) I placed the following entry into the ".labviewrc" file
labview.serialdevices: "/dev/ttya:/dev/ttyb"
If anybody has had the same problem I would love to hear about it and if you have any solutions
Jamie Shea

Hi Jamie,
1. Do you have NI-VISA driver installed on the machine on which you are running this executable?? If you are trying to run the executable on the same machine on which the development program has ran fine, then you can ignore this point.
2. If you have done all the changes that are suggested by other discussions related to this topic, then try changing the Port input to Visa Serial Configure.Vi from a control to a constant and try it. In some case, I have seen this to do the trick. I think this point should solve your problem. If it does do tell me. :-))

Arduino due and Labview wirelss serial communication using Xbee

Hello.
I am controlling a mobile robot using the Arduino due and labview
PWM value caculated on the labview is sent to Arduino due and then Due controls the robot.
These communicate wirelessly by xbee.
Now, I'd like to increase the communication speed between Arduino due and Labview.
but, when i set the value of the "Wait(ms)" function to below 10ms in Labview, communication has unstability.
so please let me know how increase the communication speed.
thank you.
-experiment image-
https://www.youtube.com/watch?v=oZdMCdHlDhM
- Arduino source-
#include <string.h>
int PWM1 = 5;
int DIR1 = 4; //direc
int PWM2 = 6;
int DIR2 = 7; //dir
float readNumber = 0;
float In1, In2, pwm, newtime, A;
float newposition1 = 0;
float newposition2 = 0;
unsigned int Aold1 = 0;
unsigned int Bnew1 = 0;
unsigned int Aold2 = 0;
unsigned int Bnew2 = 0;
volatile long encoder1Pos = 0;
volatile long encoder2Pos = 0;
int encoder1PinA = 8;//Encoder A pin
int encoder1PinB = 9;//Encoder B pin
int encoder2PinA = 11;//Encoder A pin
int encoder2PinB = 12;//Encoder B pin
int Direction1, Direction2;
float pwm1_limit=255;
float pwm2_limit=255;
float count_old = 0;
float power1_old, power1_old2, power1_old3, power1_old4, power1_old5;
void setup() {
// put your setup code here, to run once:
pinMode(DIR1, OUTPUT);
pinMode(DIR2, OUTPUT);
Serial.begin(115200);
Serial.flush();
Serial2.begin(115200);
Serial2.flush();
pinMode(encoder1PinA, INPUT);
digitalWrite(encoder1PinA, HIGH); // turn on pullup resistor
pinMode(encoder1PinB, INPUT);
digitalWrite(encoder1PinB, HIGH); // turn on pullup resistor
pinMode(encoder2PinA, INPUT);
digitalWrite(encoder2PinA, HIGH); // turn on pullup resistor
pinMode(encoder2PinB, INPUT);
digitalWrite(encoder2PinB, HIGH); // turn on pullup resistor
attachInterrupt(encoder1PinA, d1EncoderA, CHANGE);
attachInterrupt(encoder1PinB, d1EncoderB, CHANGE);
attachInterrupt(encoder2PinA, d2EncoderA, CHANGE);
attachInterrupt(encoder2PinB, d2EncoderB, CHANGE);
void loop() {
if(Serial2.available()>0){
String first = Serial2.readStringUntil('!');//랩뷰에서 받는 2개의 값을 분리하기 위한 소스("!"앞까지 끊고, "@"앞까지 끊음 ex)123!456@을 받으면 123과 456으로 나눔)
String second = Serial2.readStringUntil('@');//http://stackoverflow.com/questions/29504679/splitting-a-comma-separated-string-through-serial-arduino
float x = first.toFloat();//위에서 분리된 문자를 float형으로 바꿔줌
float y = second.toFloat();
newposition1 = -encoder1Pos; //Encoder signal
newposition2 = encoder2Pos; //Encoder signal
count_old = 0;
float power1 = x;
float power2 = y;
if(power1 >= 0){
Direction1 = LOW;
else{
Direction1 = HIGH;
if(power2 >= 0){
Direction2 = HIGH;
else {
Direction2 = LOW;
power1 = abs(power1);
power2 = abs(power2);
if(power1 > pwm1_limit){
power1 = pwm1_limit;
if(power2 > pwm2_limit){
power2 = pwm2_limit;
digitalWrite(DIR1, Direction1); //HIGH = back, LOW = forward
digitalWrite(DIR2, Direction2); //HIGH = back, LOW = forward
analogWrite(PWM1, power1);//PWM Speed Control
analogWrite(PWM2, power2);//PWM Speed Control
String strValue = String(newposition1);//숫자를 문자형으로 변환
String Q = "!";
String strValue2 = String(newposition2);
String stringThree = strValue + Q + strValue2;//문자 합치기
Serial2.println(stringThree);//Send encoder pulse to Labview
else {//when Serial communication stop
float count = count_old+1;
if(count > 10000){
newposition1 = 0; //Encoder initialization
newposition2 = 0; //Encoder initialization
encoder1Pos = 0;
encoder2Pos = 0;
else{
newposition1 = newposition1; //Encoder signal
newposition2 = newposition2; //Encoder signal
count_old = count;
Serial.println(count);
//Encoder Read//////////////////////////////////////////////////////////
void d1EncoderA()
Bnew1^Aold1 ? encoder1Pos++ : encoder1Pos--;
Aold1 = digitalRead(encoder1PinA);
void d1EncoderB()
Bnew1 = digitalRead(encoder1PinB);
Bnew1^Aold1 ? encoder1Pos++ : encoder1Pos--;
void d2EncoderA()
Bnew2^Aold2 ? encoder2Pos++:encoder2Pos--;
Aold2=digitalRead(encoder2PinA);
void d2EncoderB()
Bnew2=digitalRead(encoder2PinB);
Bnew2^Aold2 ? encoder2Pos++:encoder2Pos--;
}

piZviZ wrote:
Only data rate working is 9600 between labview and launchpad(arm cortex m4).Where all data rates work between Arduino serial port monitor and launchpad(arm cortex m4).
Since the only thing that changed is the Launchpad, then that must be the issue. Are you sure this device can handle more than just the 9600 baud rate? Are you sure you are even setting the baud rate on this device?

Some question on serial communication using J2ME

I want my Palm communicate with the other devices throught its serial port and have the following codes.
But it does not work. It always returns "No this connection" (ConnectionNotFoundException e).
Could anyone please give me some suggestions on how to correct it ?
I am sure that the baudrate is correct and there is no parity bit.
Thank you very much
if (c == connectCommand){
try{
String URI = "comm:0;baudrate=9600;bitsperchar=8";
InputConnection inputCon = (InputConnection) Connector.open(URI);
InputStream is = inputCon.openInputStream();
t.setString("Success");
catch(IllegalArgumentException e)
t.setString("Argument not correct");
catch (ConnectionNotFoundException e)
t.setString("No this connection");
catch(IOException e)
t.setString("Can't not make this connection");
}

Hi, futurefield
What should I do with the port name I got ?
open the port with the name that I used to transmit data ?
use Connector.open(portname) instead of Connector.open(URI) ?
Would you please give me more hints ?
Thank you

Serial Communication using Labview with Tiva C launchpad ARM cortex M4

I am able to comunicate perfectly between labview and launchpad at 9600 baudrate..When i trying to communicate with bauadrate of 115200 labview gives error "specifed state of attribute is not valid"
I tried to communicate with serial monitor comes with arduino and its well work with it at 115200 baudrate...
Awaiting for your replay!!!

piZviZ wrote:
Only data rate working is 9600 between labview and launchpad(arm cortex m4).Where all data rates work between Arduino serial port monitor and launchpad(arm cortex m4).
Since the only thing that changed is the Launchpad, then that must be the issue. Are you sure this device can handle more than just the 9600 baud rate? Are you sure you are even setting the baud rate on this device?

I was unable to establish a serial communication using a DLL library file

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