I try to send control command to my device over Serial RS232c. Before I install Labview 7 ,I tested communication with Hyperterminal, it works. But after I install Labview program and use Serial write example, it doesn't work. And after that hyperterminal waiting for reading and can't send control command to the device. So, I think maybe the problem come from the pin RTS,DTR didn't set and the command can't be send out to the device.
Somebody has an idea to deal with it, pls reply me.
Thank a lot.