Uegent!!!!!!!!!!!!!!!!!!! pc to h/w communication by using serial port

HI,
I want to communicate Pc to 8051chip. but i dnt know how to communicate. My requirement is send null command to the hardware n receive the ack and any data send by the h/w.
Plz anyone knows the solution then help me becoz without this my project is not working.
Thanx in advance.

Hmm. Urgent. When is your project due? What have you tried so far? Whats not working? First you need to verify that all your hardware is connected properly and the UART is properly configured on teh 8051. Then you need to make sure that the software on both the PC and the 8051 are both working properly. Just curious, what class is this project for?

Similar Messages

Pc to h/w communication by using serial port

I have write a serial port codding but thre is problem in accessing the javax.comm.*' packege.
I had downloaded that package on my pc but its not working.
Could anybody help me?

Hmm. Urgent. When is your project due? What have you tried so far? Whats not working? First you need to verify that all your hardware is connected properly and the UART is properly configured on teh 8051. Then you need to make sure that the software on both the PC and the 8051 are both working properly. Just curious, what class is this project for?

Need to build communication redundancy using serial RS-232 for Data Transfer b/w Host and RT irrespective of TCP/IP Data Transfer

Hi - I would like to build the logic in which it should accomodate the communication redundancy using serial RS-232 for Data Transfer b/w Host and RT irrespective of TCP/IP Data Transfer.
I want to do data transfer b/w host and RT through RS232 VISA portal whenever TCP/IP ethernet cable has been unplugged from the controller continuosly , it should keep on checking for TCP/IP link re-establishing also , when ever the tcp/ip link established again that time the communication should be using in that link only. This is accomplished by deploying the RT vi as execuatbale file. I made some logic regards to the above said logic , bur it was not working as much I expected.
I request you to go through the attached two VI's and let me know , what I did wrong in that,
Please do the needful.
Attachments:
TCP_Serial_Host.vi ‏33 KB
TCP_Serial_RT.vi ‏41 KB

even i am new to this topic and i am trying to get familiar with these protocols
refer to tcp server/client examples in labview examples

I pull fiftyfour bytes of data from MicroProcessor's EEPROM using serial port. It works fine. I then send a request for 512 bytes and my "read" goes into loop condition, no bytes are delivered and system is lost

I pull fiftyfour bytes of data from MicroProcessor's EEPROM using serial port. It works fine. I then send a request for 512 bytes and my "read" goes into loop condition, no bytes are delivered and system is lost

Hello,
You mention that you send a string to the microprocessor that tells it how many bytes to send. Instead of requesting 512 bytes, try reading 10 times and only requesting about 50 bytes at a time.
If that doesn�t help, try directly communicating with your microprocessor through HyperTerminal. If you are not on a Windows system, please let me know. Also, if you are using an NI serial board instead of your computer�s serial port, let me know.
In Windows XP, go to Start, Programs, Accessories, Communications, and select HyperTerminal.
Enter a name for the connection and click OK.
In the next pop-up dialog, choose the COM port you are using to communicate with your device and click OK.
In the final pop
-up dialog, set the communication settings for communicating with your device.
Type the same commands you sent through LabVIEW and observe if you can receive the first 54 bytes you mention. Also observe if data is returned from your 512 byte request or if HyperTerminal just waits.
If you do not receive the 512 byte request through HyperTerminal, your microprocessor is unable to communicate with your computer at a low level. LabVIEW uses the same Windows DLLs as HyperTerminal for serial communication. Double check the instrument user manual for any additional information that may be necessary to communicate.
Please let me know the results from the above test in HyperTerminal. We can then proceed from there.
Grant M.
National Instruments

Send command to modem using serial port and capture the response in the labview

hello.
I am doing my shool project.
I want to send command to modem using serial port and get the response in the labview.
When i run my program and enter"AT", only messy code will be displayed.
can anyone help me? thanks

Dora0512 wrote:
Thanks for you all. My partner got it already.
I am doing send sms part.
Can anyone tell me why my program is not so steadily?
It means this program can run. But somtimes I cannot receive sms. sometimes can
Basically, it is not well-written from both a LabVIEW and a communications point of view. Unfortunately, I can't elaborate because today is an exrtremely busy day at work. I'm hoping this bump will prompt someone to help you with your problem. If you could also provide us with the programmer's guide or the manual for your equipment, that would be extremely helpful.
Bill
(Mid-Level minion.)
My support system ensures that I don't look totally incompetent.
Proud to say that I've progressed beyond knowing just enough to be dangerous. I now know enough to know that I have no clue about anything at all.

Problem in using serial port.

I am using serial port to get data from a fusion splicer. The number of bytes at the port is 4096 but the read buffer of VISA read is empty. I am reading the same number of bytes. Can any one tell me what is the maximum size of VISA Read buffer? I am trying to put the contents of the buffer in a file. I am using labVIEW 6.1 on linux.I am also attaching the VI.
I also noticed this problem...If I read the number of bytes in the serial buffer many times, sometimes it reads it as 0 and I have to keep trying until it reads this 4096 bytes.
Thanx for any help.
S.Vijayalakshmi
Attachments:
serail_comm.vi ‏52 KB

Hey Viji,
In your application it looks like you are just checking to see how many bytes are at the serial port. Is it possible that your application is check for the serial data at the port before the data actually gets there. If you are looping this code as a subVI or just running it over and over it is possible that one of the iterations could occur faster than your device can write the information to the bus. In this instance you are checking the number of bytes at the port and there might not be any there yet. In this case the port reads 0 as you have designed it.
If you want the read function to wait and always read 4096 then don't wire the bytes at port to the read function. Just wire a constant/control equal to 4096 to the read function instead o
f the bytes at port. In this case, if there are not any bytes at the port the read function will wait for the bytes to show up or until the timeout period is reached.
I would also, suggest lowering your time to something more reasonable, because if your instrument quits transmitting your application is going to wait for 33 minutes. That is a long time for a program to hang.
I hope this helps out.
JoshuaP
National Instruments

Kernel Panic when I use Serial Port

Hello,
I have a macbook pro 15" 2.66 Ghz 2009 running Mountain Lion.
I use Serial Ports for communicate with instruments via Matlab or CoolTerm, using bluetooth or USB. After some minute of work, my computer crash for kernel panic.
This is the log file about a crash with matlab and bluetooth, someone can help me?
Thanks in advance
Gildo
Wed Dec 19 11:59:55 2012
panic(cpu 0 caller 0xffffff8010a43d5b): "a freed zone element has been modified in zone: kalloc.1024"@/SourceCache/xnu/xnu-2050.18.24/osfmk/kern/zalloc.c:214
Backtrace (CPU 0), Frame : Return Address
0xffffff812c78b3a0 : 0xffffff8010a1d626
0xffffff812c78b410 : 0xffffff8010a43d5b
0xffffff812c78b450 : 0xffffff8010a435d2
0xffffff812c78b530 : 0xffffff8010a245ed
0xffffff812c78b560 : 0xffffff8010e22ca2
0xffffff812c78b580 : 0xffffff7f91e9b3ac
0xffffff812c78b6c0 : 0xffffff7f91dd21bd
0xffffff812c78b7f0 : 0xffffff7f91dc59aa
0xffffff812c78b9f0 : 0xffffff7f91dcba58
0xffffff812c78bad0 : 0xffffff7f91decfb3
0xffffff812c78bb40 : 0xffffff7f91decf2f
0xffffff812c78bbb0 : 0xffffff7f91e805c4
0xffffff812c78bbf0 : 0xffffff8010e47d9a
0xffffff812c78bc50 : 0xffffff7f91e81604
0xffffff812c78bc70 : 0xffffff7f91e7df64
0xffffff812c78bca0 : 0xffffff7f91c4c525
0xffffff812c78bce0 : 0xffffff7f91c4a036
0xffffff812c78bd10 : 0xffffff8010b1fe0c
0xffffff812c78bd50 : 0xffffff8010b24c56
0xffffff812c78bda0 : 0xffffff8010b11c96
0xffffff812c78bde0 : 0xffffff8010b094af
0xffffff812c78be10 : 0xffffff8010b08645
0xffffff812c78be60 : 0xffffff8010d4c56c
0xffffff812c78bed0 : 0xffffff8010d48b6f
0xffffff812c78bf20 : 0xffffff8010d4af60
0xffffff812c78bf50 : 0xffffff8010de182a
0xffffff812c78bfb0 : 0xffffff8010aced33
      Kernel Extensions in backtrace:
         com.apple.iokit.IOBluetoothFamily(4.0.9f33)[1C326A11-ADF7-353E-AD41-458D6A886E0 5]@0xffffff7f91db7000->0xffffff7f91e57fff
            dependency: com.apple.iokit.IOUSBFamily(5.4.0)[C3094550-7F58-3933-A4F7-CD33AE83F8B9]@0xffff ff7f910ea000
         com.apple.iokit.IOSerialFamily(10.0.6)[0165A9A0-F112-366C-9D82-EFC7344274F0]@0x ffffff7f91c49000->0xffffff7f91c56fff
         com.apple.iokit.IOBluetoothSerialManager(4.0.9f33)[6B6E14A7-7A68-3291-BFFF-F972 4D5B50FA]@0xffffff7f91e7b000->0xffffff7f91e84fff
            dependency: com.apple.iokit.IOSerialFamily(10.0.6)[0165A9A0-F112-366C-9D82-EFC7344274F0]@0x ffffff7f91c49000
         com.apple.iokit.AppleBluetoothHCIControllerUSBTransport(4.0.9f33)[867D6939-4D49 -3149-A1A5-380C236C8D12]@0xffffff7f91e8f000->0xffffff7f91eb5fff
            dependency: com.apple.iokit.IOUSBFamily(5.4.0)[C3094550-7F58-3933-A4F7-CD33AE83F8B9]@0xffff ff7f910ea000
            dependency: com.apple.iokit.IOACPIFamily(1.4)[A35915E8-C1B0-3C0F-81DF-5515BC9002FC]@0xfffff f7f90ff2000
            dependency: com.apple.iokit.IOPCIFamily(2.7.2)[B1B77B26-7984-302F-BA8E-544DD3D75E73]@0xffff ff7f910af000
BSD process name corresponding to current thread: MATLAB
Mac OS version:
12C60
Kernel version:
Darwin Kernel Version 12.2.0: Sat Aug 25 00:48:52 PDT 2012; root:xnu-2050.18.24~1/RELEASE_X86_64
Kernel UUID: 69A5853F-375A-3EF4-9247-478FD0247333
Kernel slide:     0x0000000010800000
Kernel text base: 0xffffff8010a00000
System model name: MacBookPro5,3 (Mac-F22587C8)
System uptime in nanoseconds: 4765863445501
last loaded kext at 2974523021770: com.apple.filesystems.smbfs          1.8 (addr 0xffffff7f91019000, size 229376)
last unloaded kext at 34978808166: com.parallels.kext.prl_usb_connect          7.0 15104.778994 (addr 0xffffff7f9114c000, size 28672)
loaded kexts:
com.nvidia.CUDA          1.1.0
org.virtualbox.kext.VBoxNetAdp          4.0.4
org.virtualbox.kext.VBoxNetFlt          4.0.4
org.virtualbox.kext.VBoxUSB          4.0.4
org.virtualbox.kext.VBoxDrv          4.0.4
com.parallels.kext.prl_vnic          7.0 15104.778994
com.parallels.kext.prl_netbridge          7.0 15104.778994
com.parallels.kext.prl_hid_hook          7.0 15104.778994
com.parallels.kext.prl_hypervisor          7.0 15104.778994
com.parallels.kext.prl_usb_connect          7.0 15104.778994
com.logmein.driver.LogMeInSoundDriver          1.0.0
at.obdev.nke.LittleSnitch          3854
com.apple.filesystems.smbfs          1.8
com.apple.driver.AppleUSBCDC          4.1.22
com.apple.driver.AppleHWSensor          1.9.5d0
com.apple.driver.AppleTyMCEDriver          1.0.2d2
com.apple.driver.AGPM          100.12.69
com.apple.driver.AppleHDAHardwareConfigDriver          2.3.1f2
com.apple.driver.AppleHDA          2.3.1f2
com.apple.driver.AppleMikeyHIDDriver          122
com.apple.filesystems.autofs          3.0
com.apple.driver.AudioAUUC          1.60
com.apple.driver.AppleSMCLMU          2.0.2d0
com.apple.driver.AppleBacklight          170.2.3
com.apple.driver.AppleMikeyDriver          2.3.1f2
com.apple.driver.AppleMuxControl          3.2.11
com.apple.driver.ACPI_SMC_PlatformPlugin          1.0.0
com.apple.driver.AppleLPC          1.6.0
com.apple.iokit.IOBluetoothUSBDFU          4.0.9f33
com.apple.iokit.BroadcomBluetoothHCIControllerUSBTransport          4.0.9f33
com.apple.driver.AppleUpstreamUserClient          3.5.10
com.apple.driver.AppleMCCSControl          1.0.33
com.apple.GeForce          8.0.0
com.apple.iokit.IOUserEthernet          1.0.0d1
com.apple.iokit.IOBluetoothSerialManager          4.0.9f33
com.apple.Dont_Steal_Mac_OS_X          7.0.0
com.apple.driver.ApplePolicyControl          3.2.11
com.apple.driver.SMCMotionSensor          3.0.2d6
com.apple.driver.AppleUSBTCButtons          235.4
com.apple.driver.AppleFileSystemDriver          3.0.1
com.apple.AppleFSCompression.AppleFSCompressionTypeDataless          1.0.0d1
com.apple.AppleFSCompression.AppleFSCompressionTypeZlib          1.0.0d1
com.apple.BootCache          34
com.apple.driver.AppleUSBTCKeyEventDriver          235.4
com.apple.driver.AppleUSBTCKeyboard          235.4
com.apple.driver.AppleIRController          320.15
com.apple.driver.AppleUSBCardReader          3.1.0
com.apple.iokit.SCSITaskUserClient          3.5.1
com.apple.driver.XsanFilter          404
com.apple.iokit.IOAHCIBlockStorage          2.2.2
com.apple.driver.AppleFWOHCI          4.9.6
com.apple.driver.AppleAHCIPort          2.4.1
com.apple.driver.AirPort.Brcm4331          602.15.22
com.apple.nvenet          2.0.19
com.apple.driver.AppleUSBHub          5.2.5
com.apple.driver.AppleEFINVRAM          1.6.1
com.apple.driver.AppleUSBEHCI          5.4.0
com.apple.driver.AppleUSBOHCI          5.2.5
com.apple.driver.AppleSmartBatteryManager          161.0.0
com.apple.driver.AppleRTC          1.5
com.apple.driver.AppleHPET          1.7
com.apple.driver.AppleACPIButtons          1.6
com.apple.driver.AppleSMBIOS          1.9
com.apple.driver.AppleACPIEC          1.6
com.apple.driver.AppleAPIC          1.6
com.apple.driver.AppleIntelCPUPowerManagementClient          196.0.0
com.apple.nke.applicationfirewall          4.0.39
com.apple.security.quarantine          2
com.apple.driver.AppleIntelCPUPowerManagement          196.0.0
com.apple.driver.AppleBluetoothHIDKeyboard          165.5
com.apple.driver.AppleHIDKeyboard          165.5
com.apple.driver.AppleBluetoothHIDMouse          175.8
com.apple.driver.AppleHIDMouse          175.8
com.apple.driver.IOBluetoothHIDDriver          4.0.9f33
com.apple.driver.DspFuncLib          2.3.1f2
com.apple.kext.triggers          1.0
com.apple.iokit.IOFireWireIP          2.2.5
com.apple.driver.AppleBacklightExpert          1.0.4
com.apple.driver.AppleHDAController          2.3.1f2
com.apple.iokit.IOHDAFamily          2.3.1f2
com.apple.driver.AppleSMBusPCI          1.0.10d0
com.apple.driver.IOPlatformPluginLegacy          1.0.0
com.apple.driver.IOPlatformPluginFamily          5.2.0d16
com.apple.iokit.AppleBluetoothHCIControllerUSBTransport          4.0.9f33
com.apple.driver.AppleSMBusController          1.0.10d0
com.apple.nvidia.nv50hal          8.0.0
com.apple.NVDAResman          8.0.0
com.apple.iokit.IOAudioFamily          1.8.9fc10
com.apple.kext.OSvKernDSPLib          1.6
com.apple.iokit.IOSurface          86.0.3
com.apple.iokit.IOSerialFamily          10.0.6
com.apple.iokit.IOBluetoothFamily          4.0.9f33
com.apple.driver.AppleGraphicsControl          3.2.11
com.apple.iokit.IONDRVSupport          2.3.5
com.apple.iokit.IOGraphicsFamily          2.3.5
com.apple.driver.AppleSMC          3.1.4d2
com.apple.driver.AppleUSBMultitouch          235.7
com.apple.iokit.IOUSBHIDDriver          5.2.5
com.apple.iokit.IOSCSIBlockCommandsDevice          3.5.1
com.apple.iokit.IOUSBMassStorageClass          3.5.0
com.apple.driver.AppleUSBMergeNub          5.2.5
com.apple.driver.AppleUSBComposite          5.2.5
com.apple.iokit.IOSCSIMultimediaCommandsDevice          3.5.1
com.apple.iokit.IOBDStorageFamily          1.7
com.apple.iokit.IODVDStorageFamily          1.7.1
com.apple.iokit.IOCDStorageFamily          1.7.1
com.apple.iokit.IOAHCISerialATAPI          2.5.0
com.apple.iokit.IOSCSIArchitectureModelFamily          3.5.1
com.apple.iokit.IOFireWireFamily          4.5.5
com.apple.iokit.IOAHCIFamily          2.2.1
com.apple.iokit.IO80211Family          500.15
com.apple.iokit.IONetworkingFamily          3.0
com.apple.iokit.IOUSBUserClient          5.2.5
com.apple.driver.NVSMU          2.2.9
com.apple.iokit.IOUSBFamily          5.4.0
com.apple.driver.AppleEFIRuntime          1.6.1
com.apple.iokit.IOHIDFamily          1.8.0
com.apple.iokit.IOSMBusFamily          1.1
com.apple.security.sandbox          220
com.apple.kext.AppleMatch          1.0.0d1
com.apple.security.TMSafetyNet          7
com.apple.driver.DiskImages          344
com.apple.iokit.IOStorageFamily          1.8
com.apple.driver.AppleKeyStore          28.21
com.apple.driver.AppleACPIPlatform          1.6
com.apple.iokit.IOPCIFamily          2.7.2
com.apple.iokit.IOACPIFamily          1.4
com.apple.kec.corecrypto          1.0

Any or all of the following third-party system modifications may be contributing to your problem:
CUDA
VirtualBox
Parallels
LogMeIn
LittleSnitch
If the panic is recurrent, I suggest you uninstall all of them according to the developers' instructions, reboot, and see whether there's any improvement. If there is, you can experiment with putting them back, one at a time, to identify which one is at fault.

X4200 - static IP configuration error (using serial port)

I try to setup a static IP address of ILOM on a Sun X4200 server using serial port
After login as root I use command from manual:
set /SP/network pendingipaddress=192.168.2.123 pendingipnetmask=255.255.255.0 pendingipgateway=192.168.2.1 pendingipdiscovery=static commitpending=true
but system say
"invalid command syntax"
Usage: set [target] <property>=value> [<property>=<value>...]
Problem is with "commitpending" command but i don't know why, anyone know the possible reason?
Sincerrelyy
Cyprian Sawicki

I try to setup a static IP address of ILOM on a Sun X4200 server using serial port
After login as root I use command from manual:
set /SP/network pendingipaddress=192.168.2.123 pendingipnetmask=255.255.255.0 pendingipgateway=192.168.2.1 pendingipdiscovery=static commitpending=true
but system say
"invalid command syntax"
Usage: set [target] <property>=value> [<property>=<value>...]
Problem is with "commitpending" command but i don't know why, anyone know the possible reason?
Sincerrelyy
Cyprian Sawicki

HT204387 Does a classic bluetooth (v2.1) based accessory using Serial Port Profile (SPP) require MFi chip to communicate with iPhone or iPad ?

Dear All
Can classic bluetooth (v2.1) based accessory using Serial Port Profile (SPP) communicate with all iPhones or iPads ?
Is MFi chip required by a classic bluetooth(v2.1) accessory to communiate with iPhone or iPad over Serial Port Profile ?
Thanks
Manju

Due to a copy/paste glitch, some necessary spaces have inadvertently been removed. If I could fix this, I would.

Servlet using Serial Port

Everyone,
I am having trouble getting a servlet to access a serial port. I am deploying to Sun Application Server 8. I am using the Sun Java Communications API for the serial communications. When I downloaded the Comms API, the readme described three steps to integrate the API into the Java environment.
1.) Copy these files into the bin directory of the JRE
win21com.dll
2.) Copy these files into the lib directory of the JRE
comm.jar
javax.comm.properties
3.) Add the path to comm.jar to the CLASSPATH environment variable
This works great for a standalone application but I cannot get it to work in a servlet container.
At first, the servlet could not find the Comm API classes. I solved this problem by integrating the contents of the comm.jar with j2ee.jar. This worked but I would still like to know a better solution. Now the servlet fails to find any serial I/O ports. In the standalone version, this same behavior is caused by not copying the javax.comm.properties into the lib directory of the JRE. I have tried inserting the javax.comm.properties into various places in j2ee.jar with no luck.
The contents of the javax.comm.properties is:
# Drivers loaded by the Java Communications API standard extension
# at initialization time
# Format:
# Each line must contain ONE driver definition only
# Each line must be of the form:
# driver=<ClassName>
# No spaces or tabs in the line.
# ClassName must implement the interface javax.comm.CommDriver
# example: driver=Win32Serial
# The hash(#) character indicates comment till end of line.
# Windows Serial Driver
Driver=com.sun.comm.Win32Driver
I guess the base problem is the the server cannot load the driver.
Any suggestion would be appreciated.
KillBill

If that doesn't work you may need to add your native library to a directory where native code is picked up by the appserver. You may be able to add the java.library.path system property to the java-config element in the domains/domain1/config/domain.xml file and restart the app server.

Using serial port to communicate with servo motor drive

I wish to use Labview 7.1 to control a brushless servo motor with encoder (from MCG) and digital drive (from AMC) via the serial port. The application simply involves progressively loading the shaft on the motor in 180 degree increments, and reading the torque. Is this possible? If so, how complicated is this approach? Thanks!

Communicating with your AMC drive via LabVIEW is no problem. There is an example in the Example Finder (Help >> Find Examples . . ) called Basic Serial Write and Read.vi which will show how to send and receive serial commands. You will have to find out what serial commands your drive responds to by looking at the AMC drive user manual. Certainly there are commands to position your servo motor at various increments and at various speeds.
As for reading torque, however, I would be surprised if the drive would directly output a torque value. One possibility might be to read the current being sent to the servo and then interpret that into a torque reading - provided that the drive has a serial command to read the current output (normally servo motors have a fairly linear current to torque conversion). Current to Torque conversions are motor specific and the accuracy using such a method might not be to good.
A more accurate method would be to use a torque sensor (Transducer Techniques sells these along with many other sensor companies) - or to use a strain gauge. Both types of sensors would need to be read in with a DAQ board (see link for National Instruments DAQ boards).
Hopefully this gives you some ideas - good luck with your project!

How do I use serial port read and show text, but not have it scroll off screen?

I am new-ish/returning amateur user of Labview and I am trying to edit the example VI "Advanced serial write and read VI" that is part of dev suite 2012. I need to use the string box to show ALL text received from serial port, always appending and only rolls off screen when more real data arrives at serial port.
What is actually happening is as more bytes (or no bytes AT ALL!) arrive during read time, current text rolls off the string box. Even when 0 bytes are received, screen is blanked out.  I am not very familiar with functions locations and even worse at understanding obscure references to functions, so please keep replies very basic so I can follow.
Just to be clear, I need the string window to behave like hyperterm does-always shows data and it is not pushed out of window arbitrarily.
Thanks,
Steve
Solved!
Go to Solution.

OK- lets start back at the beginning. I have a few questions...
WHy does incoming txt get placed at top of txt box and then scroll up?  why would it make more sense to input at the bottom and scroll toward the top. I have created this huge txt box that appears to be impossible to use.
I have attached example of txt boxes I have tried, and pic of VI I have edited. Bad marks for uglyness....
Attachments:
Capture_VI.JPG ‏117 KB
Capture_VI2.JPG ‏133 KB

Using serial Ports in LabVIEW

i am using LabVIEW 6.1 on windoes NT 4.0. what modes are supported? i need to use RS 422. is this possible?

Be very careful about installing non-standard serial cards in a PC
running NT. The NTSERIAL driver will try to control these non
standard cards (but won't be able to) and won't let the manufacturer's
driver control it unless you follow the card manufacturer's
instructions to the letter. Typically this involves installing the
manufacturer's software FIRST, setting the configuration, setting any
dipswitches or jumpers on the card, and THEN LAST, powering down,
installing the card, and powering back up. BUT PLEASE FOLLOW THE
MFG's INSTRUCTIONS, not mine if they differ.
Blackbox makes an RS422/485 card and I believe so does NI.
Douglas De Clue
LabVIEW programmer
[email protected]
Sanjay wrote in message news:<50650000000500000063
[email protected]>...
> 1) The standard/built-in serial ports on your computer are almost
> certainly not RS-422 compatible (they're actually almost certainly
> RS-232). NI (amongst other serial vendors) sells RS-485 serial
> interfaces that are fully RS-422 compatible.
> 2) From a software standpoint you can use the VISA-Serial VIs
> (recommended) or the I/O compatibility VIs to control either RS-232,
> RS-422 or RS-485.

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

My Application gets Error 37 when using Serial Port VIs.

My Application works fine developed with LV 6.1. Then I updated to LV 7.1 and now the Executable of my application gets error 37 when using the old serial port functions. The "serpdrv" file is located in the application directory and is from 02/2002. The application runs well in the development environment after I placed the "serpdrv" file in the LabView directory. I tried to put a line with "serialDevices=..." in the .ini-file of my application but this did not cause an improvement. I also tried to rebuild the EXE with this line in the "labview.ini" file but nothing changes.
Does anybody have another idea ?
Many thanks for help
Thomas

>Did you actually replace the old serial functions that come with 7.1 with the functions from 6.1?
Yes. E.g. "open serial driver.vi" uses "open device" with "serpdrv" as device string.
I had the same problem running my application as VI´s. After the copy of serpdrv into the LV 7.1 directory everything works fine.
I don´t understand why the application running as a .exe doesn´t find the serpdrv when it is in the same directory....
Nevertheless many thanks for your answer
Thomas

Uegent!!!!!!!!!!!!!!!!!!! pc to h/w communication by using serial port

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