conversion of a binary data stream to decimal numbers

[Ashley.w]

Hi

I am having great difficult working out how to convert my binary data stream to decimal numbers.

The data I am reading back is in the format of a binary string, starting with the Most Significant Bit (MSB) of the first word, then the corresponding Least Significant Bit (LSB), where a word is two bytes long. A carriage return indicates message termination.  The return message starts with ‘bin,’ followed by the number of bytes requested. No delimiters are used to separate the data, but a carriage return is appended onto the end of the data.

bin,<first word msb><first word lsb>...<last word lsb><CR>

e.g. bin,$ro¬z1;@*...etc

Does anybody know of any examaple vi that can help me convert this data from binary to decimal numbers?

Many Thanks

Ash

 

[DavidJCrawford]

Ash

Can you post your VI with example data?

thanks

David

[GerdW]

Hi Ashley,

after getting the string you can strip the first 4 characters. After this try a typecasting to array of U16. If the numbers are not correct, you can add a swap bytes operation to the resulting array.

Message Edited by GerdW on 09-13-2006 02:46 PM

[Ashley.w]

Hi David

Attached is my vi

This is the data format:

bin,E€H€I€I€I€H€I€G€H€HI€I€K€I€I€I€I€I€H€II€I€H€I€I€I€K€I€I€HI€I€I€H€I€K€I€I€J€KI€K€I€I€I€H€I etc...... <cr>

I take the data in chunks in a while loop which terminates when there are no bytes left at the port. 

I hope this explains the probelm beter.  I am going to try Gerds suggestion and see how I get on.

Many thanks

Ash

[labstew]

Gerd, what is the name of the first function that you used to remove the first 4 characters... I am searching high and cannot find it 😞

edit:

10 mins of searching.. I post this question and find the string subset function 30 seconds later.......

Message Edited by labstew on 04-26-2007 02:49 PM