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Case statements in VHDL


Case statements in VHDL

By : user3863057
Date : January 02 2021, 06:48 AM
will help you For simulation or synthesis?
Either way, from the documentation:
code :


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VHDL If Statements

VHDL If Statements


By : عنوصكي ريمكسنج
Date : March 29 2020, 07:55 AM
should help you out If your vars are variables, then you can't sensibly do the second option as you can't use variables across processes (in most circumstances, see later). If they are actually signals, then yes you can.
In the first code - if they are variables, then yes, they will update immediately and the second part of the code will run.
Why use concurrent statements in VHDL?

Why use concurrent statements in VHDL?


By : PARVINDRAN MARATHA
Date : March 29 2020, 07:55 AM
I wish this help you Concurrent statements, as you may know, in a pure functional sense (i.e. not considering hardware implementation) do not incur any delay. So when you write
code :
Q <= state;
Qbar <= not Q;
in vhdl case statements,how to deal with 4 value logic?

in vhdl case statements,how to deal with 4 value logic?


By : cyuankai
Date : March 29 2020, 07:55 AM
wish helps you If the value of prstate is always to be well defined ("00", "01", "10" or "11"), then you can propagate any undefined values if you use:
code :
when others => prstate <= (others => "XX");
Combining two separate case statements in NetSuite Case Statements

Combining two separate case statements in NetSuite Case Statements


By : user3515581
Date : March 29 2020, 07:55 AM
I hope this helps you . You can have multiple WHEN in a case statement. The first matched WHEN determines the result unless it gets to the ELSE.
code :
Case when {item.custitem54} = 'Yes' 
          and {shipdate} between date '2020-05-25' and date '2020-12-25' then {quantity} 
     when {item.custitem54} is null then {quantity} 
     else null 
end
Bundle statements in VHDL

Bundle statements in VHDL


By : JunkDoddo
Date : March 29 2020, 07:55 AM
like below fixes the issue How can I combine/bundle statements for further use and better handling? For example some assignments like this which would be used many times more in future calls of the routine. , Records and/or aggregates:
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