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

[Jan D. <ja...@ja...>]

Mm, the attribute is declared in pck_myhdl but probably this
is namespace issue. Iff a port uses an enum, then a top-level
package is needed and the declaration is not seen, unlike
when the enum type is declared in the architecture.

Jan

On 09/03/2013 09:48 PM, David Holl wrote:
> Hello, When using ghdl for syntax checks, I get the following error
> for any state machine where encoding="one_hot": pcie_drx.vhd:137:11:
> no declaration for "enum_encoding"
>
> I can resolve ghdl's complaints by adding attribute enum_encoding:
> string; to the generated .vhd file.
>
> Is there a way to have this line included automatically in .vhd
> output?  I could add it via a shell script, but I'm wondering if
> there is "better way" to do it.  (or is GHDL in error?)
>
>
> For example, here is an trimmed-down excerpt from the top of the .vhd
> file showing where I add the line:
>
> package pck_pcie_drx is attribute enum_encoding: string;  <--- I need
> to add this line.
>
> type t_enum_t_state_22 is (
>
> IDLE,
>
> THINK,
>
> SEND_CMD,
>
> ADVANCE
>
> );
>
> attribute enum_encoding of t_enum_t_state_22: type is "0001 0010 0100
> 1000";
>
> type t_enum_t_state_23 is ( CMD, MWR_H0H1, MWR32_H2D0, MWR32_D1D2,
> MWR32_D3XX, MWR64_H2H3, MWR64_D0D1, DROP ); attribute enum_encoding
> of t_enum_t_state_23: type is "00000001 00000010 00000100 00001000
> 00010000 00100000 01000000 10000000"; end package pck_pcie_drx;
> library IEEE; etc...
>
>
>
>
> - David ps:  Thank you for the fantastic MyHDL.
>
>
>
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-- 
Jan Decaluwe - Resources bvba - http://www.jandecaluwe.com
     Python as a HDL: http://www.myhdl.org
     VHDL development, the modern way: http://www.sigasi.com
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