How to change a specific bit to 0 or 1?

[OnlyOne]

Hello,
i think i have an easy problem but i dont get the solution.
What is want to do is a vi with this parameters:
Input:
current-value (U32)
BitNumber (0..31)
State (Bool)

Output:
new-value (U32)

for example if
current-value = 00000000 00000000 00000000 00000111 (binary)
BitNumber = 2 (dez)
State = False

Then the new-value should be: 00000000 00000000 00000000 00000011 (binary)

With same parameters and State = True the new-value is unchanged because ithe bit is already true.

How do i do this?

Thanks

[MikeS81]

Hi OnlyOne,

here is one solution for you.

Mike

Message Edited by MikeS81 on 05-06-2008 11:06 AM

[daveTW]

Hi,
this is a nice problem. Hope this helps



greets, Dave

P.S. Mike, it's hard to beat you


Message Edited by daveTW on 05-06-2008 11:12 AM

[Norbert_B]

---

@daveTW wrote:

P.S. Mike, it's hard to beat you

---

But i will try it with a perharps more generic solution since you can mask more bits at a time:



hope this helps,
Norbert

Message Edited by Norbert B on 05-06-2008 04:18 AM

[OnlyOne]

Hi Mike,
thank you for your fast answer.
I was always trying to solve it like Dave and didnt think about the way that you did it (which is much easier to understand).
thx

[MikeS81]

Nice solution Norbert,

but what´s that?

Mike

Message Edited by MikeS81 on 05-06-2008 11:21 AM

[JB]

Your problem is indeed easy to solve ! Among several other solutions :






Message Edité par JB le 05-06-2008 11:24 AM

[Norbert_B]

OMG, Mike found a "nearly WEQ" in my example 😉
BUT, it is not really a WEQ (sure in this screeny), but the boolean constant is the way to determine if to switch 0=>1 or 1=>0.... I'd better document that in the future......

Norbert

EDIT: I know that this could be done by switching True-case to false and vice versa as well.... But i think (even if its currently a WEQ), it is more readable......


Message Edited by Norbert B on 05-06-2008 04:28 AM

[JB]

A few minutes to make an example and I must note that others have already posted a lot of answers and comments. You are really too fast !

[Norbert_B]

Here the reworked example as vi, maybe someone could use it......


Norbert