Read byte with a value up to 127 lire byte with an ASCII value greater than 7F (127 dec)


I have to read a byte with a value greater than 127, Labview turn 27.

In help I saw that Labview provides a description of ASCII that pour values ranging up to ' 127.

What do I need to do?

LabVIEW 6.1

Windows XP


I want to read a byte with a maximum value of 127, but Labiew reurn arround 27 value

How do I do?

Rigid wrote:

Thanks for your help. I'm not changing lyke I understand (my English is poor quiet...)

I have another program that communicate with the instrument. I know byte (6) must be greater than 18 (greater than 7F actually).

But with Labview, I'm only 18.

While it might be higher than 18 x, an I8 is signed, and therefore it cannot be greater than x7F - it has a range of-128 to 127. A U8 is not signed, and it's why he has a range from 0 to xFF. However, x 18 is the same if you treat as signed or not signed. I don't see how LabVIEW can read a wrong value on the serial port. Are you sure you're looking at the correct byte? Your code shows that you split the chain twice. Are you sure that you do this properly?

Given that you use on Windows you can recheck the chain received using PortMon. Allows you to see what is actually received by the driver for the serial port on Windows.

P.S. I actually meant the whole byte function.

Tags: NI Hardware

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