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AR# 19263

XST - Direct Instantiation using the UniSim library does not work

描述

In a "Direct" instantiation method, a library and component are declared during instantiation, as in the following example:

:

architecture behavioral of top is

begin

instance: entity my_library.lower(lower_arch)

port map (i => i, o => o);

end behavioral;

In the above code, "my_library" is a user library, "lower" is the entity, and "lower_arch" is the architecture that belongs to "lower". When this method is used, there is no need to perform a library and component declaration. The UniSim library contains all primitives as components instantiated as black boxes, so the required architecture names are not available.

解决方案

There is no way to work around the direct instantiation of primitives from the UniSim library. The "classical" style of instantiation must be used.

AR# 19263
日期 12/15/2012
状态 Active
Type 综合文章
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