protected types

Posted Fri, 2011-10-21 19:22 by ndhuffma

I know this is not a '93 feature so it's probably on your list as you integrate newer VHDL features consider this a vote for supporting protected types. As it currently exists these are flagged as errors. I'm using them in some testbenches and functional models.

type cmd_fifo_type is protected
  procedure add(cmd : integer; time : integer; state : std_logic; parm : integer);
  impure function empty  return Boolean;
  impure function last   return cmd_element;
  impure function remove return cmd_element;

end protected cmd_fifo_type;

This is flagged with the error "No viable alternative at input 'protected'"

‹ Format does not seem to deal with alias declarations correctly Support for VHDL-2008 attributes 'subtype and 'element ›

We'll get to VHDL 2008 later.

by philippe.faes (Sigasi) - 2011-10-24 08:37

We'll get to VHDL 2008 later. Thanks for your vote for priority.

protected / impure / ..

by logitron - 2012-01-03 10:06

I think protected was introduced in VHDL in 2002 version, nevertheless what's the status of support for 2002 / 2008?

Hi Luc, We have basic support

by philippe.faes (Sigasi) - 2012-01-05 08:44

Hi Luc,
We have basic support for protected types in our internal code base. Expect this to be released in the coming month.
-- Philippe

protected

by logitron - 2012-01-05 08:51

Hi Philippe,

That's good news!
As of now I need to go out of the Sigasi environment to use a very interesting library (RandomPkg and CoveragePkg) for testbenches support from SynthWorks.
Pls have a look at http://www.synthworks.com/downloads/index.htm to look at the details. It has some demo programs too, so it'll be easy to test if it's working correctly.

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