Convert U8 array to 16bit hex num

[Shreesha]

Hi,
I have an array of U8. I want to pull the first two 8 bit elements and join them to produce a 16 bit hex number.
Ex:
If Array ---> FE 0C 12 D4.......
Here;
Element1---> FE
Element2---> 0C
Then;
16 bit hex--> FE0C

I tried doing this, but could not come with a way of joining two 8 bit data into a 16 bit data.
Please let me know how this can be done.
A small example program would be helpful.
Thanks.

[Dave_Kaufman]

Use the decimate array vi (array pallet) to split the U8 array into two arrays, high byte and low byte. Index each array. Convert the high byte to U16. Multiply the high byte by 256 (100h) and add the low byte. Do this for each element of the arrays.

Dave.

[Donald]

Typecasting will do it too.

[tbob]

Attahced VI shows an easy way to do this.

[Rolf Østvik]

Shreesha wrote in news:50650000000800000036EA0000-
1079395200000@exchange.ni.com:

> Hi,
> I have an array of U8. I want to pull the first two 8 bit elements
> and join them to produce a 16 bit hex number.
> Ex:
> If Array ---> FE 0C 12 D4.......
> Here;
> Element1---> FE
> Element2---> 0C
> Then;
> 16 bit hex--> FE0C
>
> I tried doing this, but could not come with a way of joining two 8
> bit data into a 16 bit data.
> Please let me know how this can be done.
> A small example program would be helpful.
> Thanks.

Use the "Type Cast" function
(Function palette->Advanced->Data Manipulation->Type cast)

Wire your U8 array to the x terminal.
Wire an empty U16 (or I16) array to the typeterminal.

The output should now be a 16 bit
array.

I think this should work an all platforms (both high endian and low endian
systems).

--
Rolf

[Rolf Østvik]

Dave Kaufman wrote in news:50650000000500000098B30100-
1079395200000@exchange.ni.com:

> Use the decimate array vi (array pallet) to split the U8 array into
> two arrays, high byte and low byte. Index each array. Convert the
> high byte to U16. Multiply the high byte by 256 (100h) and add the
> low byte. Do this for each element of the arrays.

Do the split as describe above. Then multiply the high byte array by 256
(100h) and add the low byte array.

You don't need to iterate over all elements in the array.

--
Rolf

[rolfk]

Rolf Østvik wrote:

> Use the "Type Cast" function
> (Function palette->Advanced->Data Manipulation->Type cast)
>
> Wire your U8 array to the x terminal.
> Wire an empty U16 (or I16) array to the typeterminal.
>
> The output should now be a 16 bit array.
>
> I think this should work an all platforms (both high endian and low endian
> systems).

Yes exactly, because the desired transformation is that of a Big Endian
(network byte order or MSB first) and that is what LabVIEW always
assumes when typecasting or flattening independant of the underlying CPU.

Rolf Kalbermatter