UPGRADE YOUR BROWSER

We have detected your current browser version is not the latest one. Xilinx.com uses the latest web technologies to bring you the best online experience possible. Please upgrade to a Xilinx.com supported browser:Chrome, Firefox, Internet Explorer 11, Safari. Thank you!

AR# 22098

8.2i XST-"ERROR:HDLParsers:818 - Cannot determine the type of the selector &"

描述

When I run my design in XST, the following error occurs:

"ERROR:HDLParsers:818 - Can not determine the type of the selector &"

The following example results in the error:

signal a,b : std_logic;

case (a & b) is

end case;

解决方案

This error occurs when you concatenate two signals in the case condition. To work around this issue, create an intermediate signal for the concatenation.

For example:

signal a,b : std_logic;

signal concat : std_logic_vector (1 downto 0);

concat <= a & b ;

case (concat ) is

end case;

A fix is currently not scheduled for this issue.

AR# 22098
日期 12/15/2012
状态 Active
Type 综合文章
的页面