|
|
|
|
09-12-2006, 09:27 AM
|
#1 |
Generic package
hi,
is it possible to define a package with a generic option i would like to have this : package decoder is generic (N : natural) type POLY_TAB is array(0 to N) of std_logic_vector(7 downto 0); .... thanks patrick.melet@dmradiocom.fr |
|
|
|
09-12-2006, 11:34 AM
|
#2 |
|
Posts: n/a
|
Re: Generic package
<> wrote in message news: oups.com... > hi, > > is it possible to define a package with a generic option > > i would like to have this : > > package decoder is > > generic (N : natural) > > type POLY_TAB is array(0 to N) of std_logic_vector(7 downto 0); > ... > The short answer is 'no you can't put the generic in the package'. But the following might work for you instead... package decoder is type POLY_TAB is array(natural range <>) of std_logic_vector(7 downto 0); end package decoder; Now type 'POLY_TAB' is an unconstrained array. At some point you'll want to use it and you would declare a signal as... signal My_Poly_Tab: POLY_TAB(0 to 5); KJ |
|
|
|
09-12-2006, 01:47 PM
|
#3 |
|
Posts: n/a
|
Re: Generic package
For now, KJ's approach is a close as you can get. But I believe the
next balloted revision of VHDL is due to have generic packages. Then the vendors will have to update their tools to support it... Andy KJ wrote: > <> wrote in message > news: oups.com... > > hi, > > > > is it possible to define a package with a generic option > > > > i would like to have this : > > > > package decoder is > > > > generic (N : natural) > > > > type POLY_TAB is array(0 to N) of std_logic_vector(7 downto 0); > > ... > > > > The short answer is 'no you can't put the generic in the package'. But the > following might work for you instead... > > package decoder is > type POLY_TAB is array(natural range <>) of std_logic_vector(7 downto 0); > end package decoder; > > Now type 'POLY_TAB' is an unconstrained array. At some point you'll want to > use it and you would declare a signal as... > > signal My_Poly_Tab: POLY_TAB(0 to 5); > > KJ |
|
|
|
09-12-2006, 03:37 PM
|
#4 |
|
Posts: n/a
|
Re: Generic package
thank you KJ
the solution you give works fine.... |
|
|
|
09-13-2006, 03:08 AM
|
#5 |
|
Posts: n/a
|
Re: Generic package
wrote:
> hi, > > is it possible to define a package with a generic option > > i would like to have this : > > package decoder is > > generic (N : natural) > > type POLY_TAB is array(0 to N) of std_logic_vector(7 downto 0); > ... It turns out that this is a feature of VHDL-2006. Take a look at the code at: http://www.vhdl.org/vhdl-200x/vhdl-200x-ft/files.html |
|
|
