Hexadecimal string to number

[gmadhu]

Hi

        I am using LV7.1. When I am converting hex  string to number , I always get  0. What could be the reason?

Thanks

Madhu

[Graziano]

Hi!
   Post your code, possibly just the piece of conversion...

graziano

[MikeS81]

Hi Madhu,

can you show us your vi or a picture of it? Maybe you use the offset output instead of value.

Mike

Message Edited by MikeS81 on 07-14-2008 01:19 PM

[Graziano]

...or maybe you leave the "0x" prefix

graziano

[gmadhu]

Hi

          here is my VI.

[craigc]

Right click on the string control and switch the display mode from "Hexadecimal" to "Normal"

Worked for me, still a little confused why it would return 0 when "Hexadecimal" is selected.  Anyone?

[UliB]

Hello Madhu,

turn the display mode to "Normal Display" and enter your hex code.

Hope this helps.

Uli

Message Edited by UliB on 07-15-2008 12:47 PM

Message Edited by UliB on 07-15-2008 12:48 PM

[Dennis_Knutson]

---

craigc wrote:

Right click on the string control and switch the display mode from "Hexadecimal" to "Normal"

Worked for me, still a little confused why it would return 0 when "Hexadecimal" is selected.  Anyone?

---

In hex display, it will convert but the value has to be a valid ASCII hex character (0-9,A-F). For example, if in hex display, you entered 68, that is an ASCII G and the conversion will fail. Enter in hex display an F and this is the ASCII SI character which will fail. Enter a hex 44, this is an ASCII D and you get a value of 13 out.

[craigc]

Thanks Dennis,

I thought it was ASCII however its still a little misleading.  Perhaps it really should be "ASCII hex codes" under the display properties 🙂

Craig

Message Edited by craigc on 07-15-2008 11:04 AM

[RnDMonkey]

If you have your heart set on using the hex display mode for the control, you have to basically add up each hex byte. Here is a VI that will do that.

The title is only a little misleading, since a normal string is character-by-character representation of ASCII values, whereas the Hex string is a byte-by-byte representation of those values.

A normal string of FF would be seen as decimals 70 and 70.

A hex string of FF would be seen as decimal 255.

Since the Hexadecimal String to Number is expecting an array of 70 and 70, a single value of 255 will throw it off. 🙂