Synthesis

[gongdori]

Hi all,

My code contains configuration declaration. When I tried to compile the design using SXT, it failed because it couldn't find the component I binded using the "configuration" in VHDL.
I wonder if anyone experienced the same thing. If so, how did you fix the problem?
Thanks,

[CODE]
configuration my_config of module_top is
for struct
for module_A_inst : module_A
use entity work.module_A_1(rtl)
end for;
end for;

[/CODE]

Gongdori

[viviany]

XST supports VHDL configuration. You can refer to "VHDL Component Configuration" section in the XST User Guide for information about VHDL configuration that is supported by XST.

Vivian

[gongdori]

It looks that XST supports only when a component is instantiated, but not by a configuration module using "configuration" in VHDL. Is that true?

[vishalm]

1)      Yes, XST supports configurations during the declaration of the component and not through the configuration block, Through configurations you can manually switch between architectures:

for <instantation_list> : <component_name> use <LibraryName>.<EntityName(<ArchName>);

Example:

for all : BUFRS use entity work.BUFRS(rtl_small);   

You can refer page 380 of the XST User Guide http://www.xilinx.com/support/documentation/sw_manuals/xilinx12_3/xst.pdf