how to extract data from a .txt file & send it to a serial port automatically

[Krishnakumar]

Hi all

I'm a final yr B.Tech student. I am new to the entire LABVIEW thing. But i hear its really good. My dept. in collge has purchased labview & i'm tryng to use it

As i'm new to labview , i need help plz

" I want to open a .txt file (in my PC) & transmit all the contents of the file via serial (COM) port to an 89%! microcontroller. Also i want to read the feedback messages from the microcontroller thru the serial port & save it to the same file in the PC.All this must be done automatically. ie, no manual intervention after execution starts"

Kindly help me as i'm stuck here & unable to proceed further with my project

[Henrik_Volkers]

here is my 20min try without debugging (needs a rs232 and loopback connector )

use the probe and highlight the dataflow to see how it works.

as always:  there are many ways to solve your problem

[JasonSmith]

I would recommend that you look into the "VISA Write From File" and "VISA Read To File" commands on the VISA Advanced pallette.  You could look at the "Basic Serial Read & Write" example to gain a basic understanding of Serial communication through VISA, then modify it to do the file I/O rather than accessing the controls on the front panel.

If you have not already done so, you should install the latest version of NI-VISA on your system, which can be found here: NI-VISA Downloads

Jason S.
Applications Engineer
National Instruments