RS-232 in LabVIEW

[butterwaffle]

Sorry for bugging again,

As I was controlling my motor, turns out my motor can go from a value between -240,000 and 240,000 for a full rotation. I was wondering if there's a way to convert a numeric control into a hexadecimal value and then parse the entire hexadecimal number in two bytes each?

For example if my icoming number was -240,000 which is 8056FCFF in hex, can I parse it to be 80 56 FC FF? Same for 240,000 where the hex value is 80A903 to 80 A9 03?

Thanks again,

butterwafle

[johnsold]

Number to Hexdecimal String followed by Reverse String.  Look at the string palette.  There are lots of useful functions in there.

Lynn

[butterwaffle]

Sorry for bothering yet again,

I am trying to send my position number, but when I am printing out the hexadecimal string through an indicator I am not getting the value that I want in the correct order.

FOr example, if I try to print out 240,000 in hex I end up getting 00003A980 when I really want 80A90300.

The same goes for when I want to print out -240,000 in hex, I end up getting 0FFFFFFFFFFFC5680 when all I want is just 8056FCFF

In my attachment I have the image of the code I'm trying to currently fix.

[RavensFan]

There may be other ways.  But this one should work

.

[butterwaffle]

May I ask what are those tube looking things that are covering the reverse string block?I can't seem to find it in the string palette.

[RavensFan]

Typecast.

It is on the Numeric >> Data Manipulation palette.

The picture is a snippet.  You can drag and drop it on a block diagram to get the actual code to poke around with.

[butterwaffle]

Thank you I seem to have got it, my only problem now is that when I type in any number except 0 I end up displaying a 14 byte hex number. But if it is 0 then it will just display 00000000.

What I mean is that if I type in the value 1, I will end up printing out 10000000000000

[RavensFan]

Post your code so we can see what you are doing.

You aren't showing a 14 byte hex number, you are showing a 14 character hex number.  which is only 7 bytes.

It seems like you are using the wrong representation.  You should be using an I32 which is only 4 bytes, thus 8 characters in a hex formatted number that is fully padded with zeroes.

[butterwaffle]

Nevermind I just saw my problem-- turns out I was using a signed 64-bit number instead of a signed 32-bit number, doh!

Thanks for the help everybody! I'll be sure to post if I have more questions.