Converting a string representing hex into a string of the corresponding ascii characters

[DanB83]

Hi,

I would like to be able to convert a string of hex values into a string of the ascii characters that those hex values represent.

For example:

4B233F357A

would become:

K#?5z

Any suggestions most welcome.

Cheers,

Dan

[MikeS81]

Hi Dan,

you can use the "type cast" function.

Mike

[GerdW]

Hi Dan,

when having a "string of hex values" instead of a "hex string" the example shows a straight-forward, simple solution...

[MikeS81]

Hi Dan,

sorry, it was the wrong picture. I'm not sure what happend there. 🙂

Mike

[Andrew McL]

Hi Dan,

I've attached a piece of code that I wrote for a customer a while back. It takes in a Hex String Array and converts it into ASCII. I have attached a picture below but there is a more complete explanation on the community pages linked here

 

 Many thanks,

[GerdW]

Hi Andrew,

as Application engineer you should provide code for others to learn from!

- Use boolean operations directly on integer numbers

- Q&R avoids type coercions

- ArrayInterleave avoids a FOR loop

- simplify case structures

[Rod42]

I'd like to nominate Andrew's code for Rube Goldberg status.

As I can't post files/images from here. I present a text description of my equivalent code.

The HEX and NORMAL format arrays are respectively, the auto-index input and output of a FOR loop.

Within the for loop, the string input feeds to string to byte array, the byte array to number to hexadecimal string (length=constant 2), the hex string is the single input of concatenate strings, the concatenated string goes to the auto-index string output.

One for loop, no cases, no boolean algebra, no red dots.

Rod.

[Andrew McL]

Hi Rod,

I have tried to recreate your code below and I concede that my code wasn't perhaps the simplest piece of coding in the world. Although as we say on the training courses "These are not the only solutions, you may in fact find better, more efficient ways of doing things". This would definitely be one of these cases.

I can't work out how you got rid of the coercion dots so if you want to post, I shall try and update. I think what I've attached describes what you have done.

 

Many thanks,

[Rod42]

Hi Andrew,

Just get rid of the "To I32" and you've got it, ie wire the U8 array directly to the [polymorphic] number to hex string. I'm using rev 8.2

BTW: This is a diversion as Gerd's posted VI answered the original query.

Rod.

[Wayne.C]

Gerd,

Nice answer.

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Andrew,

Your code scares me.  Please consider modifying your post in the communities.  Here is a much easier way to do this.