From: Pit Capitain <pit@...>
Date: 2006-02-17T21:17:46+09:00
Subject: Re: recontextualizing a block (looking for deep magic)

Phil Tomson schrieb:
> ...
> 
>   class Counter < RHDL
>     inputs    :clk, :rst
>     outputs   :count_out
>     variables :count=>0
> 
>     define_behavior { 
>       process(clk) {
>         if clk.event and clk == 1
>           if rst == 1
>             count = 0
>           else
>             count += 1
>           end
>           count_out << count
>         end
>       }
>     }
>   end
> 
> ...
> 
> However, notice the 'variables' method.  The idea there is that there could be 
> some variables used in the define_behavior block (and this was the case with 
> the previous incarnation of RHDL, so I didn't want to lose that functionality).
> Now by 'variable' here I mean that I want a variable that also has scope 
> within the define_behavior block.  The define_behavior block will be called 
> many, many times during a simulation and I don't want the variable to be 
> re-initialzed on each call.
> 
> ...

Phil, I don't understand the usage of variables. When should they be 
initialized? What should be their scope (class, instance, thread, 
other)? Can't you use instance variables with accessor methods?

Regards,
Pit