serial cable working well but when i connected serial cable to my circuit board it can not take data from my my microcontroller in which i burn a program and that program should display on the lab view example basics serial read and write but it is not display the program on lab view i also replace microcontroller, max 232 ic bubber ic 74ls244 but it is no use please help me and thanks alot in advance.
Presumably you've tested the serial cable under some other scenario? Have you checked the wiring connections? In other words, the pinouts? Do you need to have a null modem connection? Have you verified if the same problem exists with HyperTerminal (or similar, depending on your OS)?
If the communication works in HyperTerminal then the most likely reason is one of termination characters with your messages. This is the problem most people encounter because HyperTerminal hides all that stuff. When you send the command do you need to terminate with a character or characters, such as a carriage return and/or linefeed? What about on reads?
i have to set the baud rate which is 9600 select hardware which is none data bit which is 8 bit and then i click the cable to check on the hyper terminal option data transmitts but when i connect it to my board it can't take the data and not shown on the lab view i check my board sevral times change my i.c my microcontroller but no use.
I'm sorry, but I'm confused as to what you're saying now. You had said that it worked with HyperTerminal. Now you seem to be saying it doesn't. Let's keep LabVIEW out of this for the moment. Can you communicate with your board with HyperTerminal? That means you actually have the cable connected to your board and you're talking to it via HyperTerminal.
Are you cheetha or are you night rider? Why are you using different login names? If you are the same person, it just confuses the thread that much more. (Besides the "yes, hyperterminal works", then "no, hyperterminal doesn't work" confusion.)