Re: [myhdl-list] attribute enum_encoding: string;

[David H. <da...@ad...>]

On Thu, Sep 05, 2013 at 06:03:33AM -0500, Christopher Felton wrote:
> On 9/4/13 11:26 PM, David Holl wrote:
> > But it still triggers the "no declaration" error in ghdl when I specify encoding='one_hot' for states:
> > ...
> I have updated the example, for me I don't get the error, here is a snip of the converted code
> 
>      type t_enum_states_1 is (
>          IDLE,
>          THINK,
>          SEND_CMD,
>          ADVANCE
>      );
>      attribute enum_encoding of t_enum_states_1: type is "0001 0010 0100 1000";

hrm --- Yep, that's the code that I'm also generating.

>     >> ghdl -a pck_myhdl_09.vhd m_think.vhd
>     >> ghdl -e m_think
>     >> ghdl -r m_think

But "ghdl -a ..." still complains unless I patch m_think.vhd to add "attribute enum_encoding: string;"

    tensor(pts/0):~/m_think> diff -u m_think.vhd.orig m_think.vhd
    --- m_think.vhd.orig    2013-09-05 08:31:50.002627130 -0400
    +++ m_think.vhd 2013-09-05 08:37:51.481874280 -0400
    @@ -6,6 +6,7 @@
     
     package pck_m_think is
     
    +attribute enum_encoding: string;
         type t_enum_states_1 is (
         IDLE,
         THINK,

> The version of GHDL I am using:
>      ghdl -v
>      GHDL 0.29 (20100109) [Sokcho edition]
>       Compiled with GNAT Version: 4.4.0 20080314 (experimental)
>       mcode code generator
>      Written by Tristan Gingold

I'm using ghdl from Debian's package repository ("jessie" aka "testing").  It looks like a similar version to yours with differences in the GNAT version and code generator.

    tensor(pts/0):~/m_think> ghdl -v
    GHDL 0.29 (20100109) [Sokcho edition]
     Compiled with GNAT Version: 4.4.4
     GCC back-end code generator
    Written by Tristan Gingold.