LABVIEW VISA ERRORS WITH ARDUINO

[vanashree]

i tried all these solutions none of them work..i searcched on termination char of arduino.it is null character \0

how can i use line feed or carriage to add this.i tried concatenating still i didnt work.is there any other solun?

[vanashree]

i really tried everything but its really not working.this is related to my project kindly reply as soon as possible

[RavensFan]

I don't understand your comment about the Ardino code have a null character as the termination character.  I don't see how that gets defined in that code.

What I do see is that you do a Serial.Read(), and by googling that http://arduino.cc/en/Serial/read I see that it returns exactly one byte from the serial buffer.  So I con't know how you expect to work with one byte when you have code that is comparing it to 164, and your LabVIEW code can be sending multiple bytes per write.

[johnsold]

Simply replace the line feed constant with a string constant. Set it for '\' Codes Display. Then type in \0. If you are reading data from the Arduino you also need to replace the termination character at VISA Configure Serial Port to 0.

Some systems use null in special ways so it is possible that it may not work.

Lynn

[vanashree]

 i tried \0 in spring constant and it doesnt work

[vanashree]

k.. RavensFan i removed that 164 code and replaced it with 1. Still it doesnt work. n when i check stufs from serial monitor of arduino things work smoothly.i wanna use labview just to provide user friendly interface. i also tried removing that htoi file still things are not getting better. i m sad to irritate like this but now its really unbearable.. 

[RavensFan]

What exactly is a "htoi file"?

[Neos]

when you are sending commands from your Arduino IDE, what termination character are you using .

you can find it in bottom of serial monitor window.

you have not included any termination character in your sketch.

[RavensFan]

Let's be clear on terminology.  The original post shows the LabVIEW VI doing a VISA Write.  The arduino text code only shows a "Serial.Read()".  That means the communication is one way FROM the PC and TO the Arduino.

[dkfire · Accepted solution]

One more thing to take into account. Look at the information in this post.

It is talking about what happens when you open the serial port in LabVIEw to an Arduino board.

You need to place a wait before you write anything to the board. Place it just after the VISA "Configure Serial Port". Set the wait to 2000ms.

One more thing about your Arduino programming. What is PORTC ?