OpenCom restores material

Hello

I have a perculiar problem. I have a test configuration and I would like to communicate via RS232.

I'm contacting an Arduino, ATMega (which could be part of the problem...) using a USB cable and RS232 Protocol at 19200 baud. I use COM12 (not that it matters)

I use Win7.

I have a program called Hercules who is basically hyper Terminal. I can use it with success to open my COM port and connect with my test setup and everything works fine.

I also opened NI Max and the test panel Visa of COM12 to communicate with my configuration of test successfully. Still, everything works fine.

HOWEVER!

When I try to use the program that I write in the CVI, I get different behavior. When I open the com port, my material passes through a kind of reboot.

I'm confused because it doesn't use NI Max, not to mention the Hercules. I made NO changes to my hardware.

But since I was able to communicate with the other two methods of software, I can't imagine that it's a hardware problem. Am I missing something?

EMH is my code. I tried both versions OpenCom. I also tried 9600 baud without change.

OpenComConfig (12, "COM12", 19200, 0, 8, 1, 0, 0);

OpenCom (12, "COM12");
CloseCom (12);

Any help would be appreciated.

Arduino is designed to reset each time that the port is open.

You can see the same behavior when you use built-in series monitor in IDE Arduino.

It's called the autoreset function and is used by arduino IDE to load programs to your Board of Directors.

It resets the Board and when the bootstrapper responds, the IDE converses with her and load the program without needing a tool of CPSI.

If you want to turn it off, I think that there is a welding-rider, you can easily remove.

Check the bottom of the Board.

UNO has this feature, I hope that Mega has also.

Search the forums for info 'auto reset function' for more up to date.

I hope this helps.

Tags: NI Software

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