convert a hexadecimal array to signed integer

[sarwatsarfaraz]

I've created a hexadecimal array. I need to convert it to signed integer

For example if I input 'ff48' into the array, I should get -184 as the output. 

I tried creating a local variable from the Hexadecimal input and changing the representation to decimal, but then 'ff48' is being converting to unsigned integer, i.e., 65352.

Is there a way to do it?

I've also attached what I've done up till now.

Thanks.

[GerdW · Accepted solution]

Hi sarwat,

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@sarwatsarfaraz wrote:

I've created a hexadecimal array. I need to convert it to signed integer

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No, you did not create an array. You placed a default scalar control on your frontpanel!

No, you don't need to convert to "signed integer", it already is a signed integer as you set the I32 datatype!

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@sarwatsarfaraz wrote:

For example if I input 'ff48' into the array, I should get -184 as the output. 

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Set the datatype for both frontpanel elements to I16, then type FF48 into the control and run the VI:

[sarwatsarfaraz]

This worked.

But why doesn't I32 show signed integer and I16 does?

[GerdW · Accepted solution]

Hi sarwat,

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@sarwatsarfaraz wrote:

But why doesn't I32 show signed integer and I16 does?

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Because FF48 (I16) is something completely different than 0000FF48 (I32)…

[sarwatsarfaraz]

I need to join multiple elements of an array into a single element. 

I've attached a picture of how i want it to be.

How can I do this?

[GerdW · Accepted solution]

Hi sarwat,

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@sarwatsarfaraz wrote:

I need to join multiple elements of an array into a single element. 

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Several options:

1. Index the elements you  want to join, then use the JoinNumbers function…
2. Index the elements you want to join and apply basic math to calculate your number (y=256*a+b)…
3. Use TypeCast…
4. When your array represent bytes then you might use UnflattenFromString…

[crossrulz · Accepted solution]

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@GerdW wrote:
4. When your array represent bytes then you might use UnflattenFromString…

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You will need the Byte Array To String before the Unflatten From String.  But do note that the Byte Array To String is literally a No Op (takes no clock cycles or memory) since an array of bytes and a string have the exact same data format.

I will also state that I try to avoid the Type Cast and prefer the Unflatten From String due to the additional options with the Unflatten From String.