flash memory

[nawaf]

thank u 

you can see in your laptop 4 input for usb  or 3 or 2

but how i know when i put flash memory from where  come the flash memory from input 1 or input2 or input 3

how the labview know??????

when put flash memory the name drive D

when the first flash still work and  put another flash memory the name drive E

but when the first flash not work the second flash name D

i need constant drive  not change

for the first input usb D

the second  input E

some person  tell me the solution we can solve just  in the registry

help me plz

[GerdW]

Hi nawaf,

this is a LabView forum, not an (windows) OS forum.

LabView doesn't assign the drive letters, you only can check for new drives.

Why do you need constant drive? Put a key on the users flash drive and check this key!

[nawaf]

because if i have many door how the labview know from where the flash come

If it does not change the my  vi   the labview open all my door  at the same time because it allowed me in all door open

plzzzzzzzzzzzzzzzzz help me

[RavensFan]

Perhaps you can talk to the USB drives at a lower level of communication such as USB Raw to be able to distinguish one USB port from another.  If you are just treating those USB drives as drives, then Windows handles all of that and essentially hides all of the low level communication such as determining what USB port to communicate with.  This is really more of a Windows question than a LabVIEW question.  Once you can deal with the Windows side of it, then I'm sure you could get LabVIEW to do what you want from there.

However, I really don't think your application is a good one to be using with a Windows operating system.  It sounds like you want to make a security system on the cheap.  While a security system may have a GUI/Windows interface for setting up user access rights and times, you'll find that the heart of any real security system doesn't run on this but on a proprietary system of hardware.  And there are good reasons for this in terms of robustness and reliability, and also in the security of the security system itself.

There are other things to worry about on the safety side.  What if the system fails, can people accidentally get locked in?  What if there is a fire?  Will people be able to get out?  Will the fire department be able to get in?

While what you are trying to do sounds like an interesting project, I hope it is just a science project and I highly recommend that you do NOT turn it into a real security system.

PS:  Perhaps if you added at least 50 more "z"'s  to your "plzzz..." then that will guarantee you'll get more help.

Message Edited by Ravens Fan on 06-06-2009 10:23 PM

[nawaf]

thank you

yes this project is simple

but we can development

for the fire i can use daq device for many sensior read the temperature or another sensior ,when read heigh temperature open all the door just for go out  

if the system fails  people canot  accidentally get locked in  , you do not see my project

thank you my friend

i need some one know about registry