Regarding simulation warnings in modelsim and uninitialized variables

[me0414013]

While simulating my vhdl code in modelsim.
I am getting some warning like
-----------------------------------
# ** Warning: NUMERIC_STD."/=": metavalue detected, returning TRUE
# Time: 0 ps Iteration: 0 Instance: /---/--/--/--
-------------------------------------

And I am getting the output as expected.
I came to know that the warnings are because of uninitialized variables..
but doubted will there be any problem when it goes on to the real fpga implementation..
I made sure that the code is synthesizable(in ISE) ...
will there be any problems because of the uninitialized variables when in it goes into the board????
thanks in advance..

 

[TrickyDicky]

On the real board, values can only be '0' or '1'. So as long as you dont care what the power up state is, then there will not be a problem. You can supress those warnings in modelsim under "simulate"-> "runtime options" -> "supress messages from IEEE packages"

 

[me0414013]

." So as long as you dont care what the power up state is"

power up state????
can u tell more about it?? i couldn't get

 

[syedshan]

power up state means the initial state when your system power up or starts.

Usually it is a good habbit to use the reset system as soon as system power up to take it back to some predefined state, for example either relevant registers become all ZEROS or something else of your choice.

Hope this helps

 

[me0414013]

thanks syedshan