serial port data bits problem

[kivi]

Now I am using the VISA Configure Serial Port to initialize the serial port. The value of data bits is between five and eight. The default value is 8. But I need to transfer nine data bits once ( the ninth is direction bit) .I wander how to realize this purpose. Appreciate your help!

[Pnt]

I had not noticed it before !

It is not a problem of Labview. Hyper-terminal allows you up to 8 bits too.

So it is a PC limitation.

Solution: Send the number nine bit, to a new byte. You have to configure your hardware accordingly, to read the new byte.

If you explain more, what you are trying to do, maybe i can help more.

[gaogonghm]

you could use the property node  parity to go through the nine bit transmition.

pay attention that have some 2-6ms delay before change the parity after send the direction bit.

I have no VI at hand. if you need , i can upload latter

[smercurio_fc]

A search of the KnowledgeBase can turn up answers: How Can I Do 9-bit Serial Transmission Instead of 7 or 8 bits?

There is also a link to an example in the article.

[kivi]

Hi,Pnt，gaogonghm，Smercurio ,thank your very much for your kindness and I am trying those recommended methods. Hope to solve this problem !