Xilinx VHDL Attribute syntax error

May 08, 2007 2 Replies

Hello,



I was switching UCF lines to VHDL attributes when I came into this syntax error. Can someone suggest what the problem is?



#UCF file works fine INST cam2_x0_ibufd_inst DIFF_TERM = TRUE; INST cam1_x0_obufds IOSTANDARD=LVDSEXT_25;


-- VHDL attribute DIFF_TERM : boolean; attribute DIFF_TERM of cam2_x0_ibufd_inst:label is true; -- works attribute IOSTANDARD : string; attribute IOSTANDARD of cam1_x0_obufds:label is LVDSEXT_25; -- syntax error



begin



The syntax error is -- Undefined symbol 'LVDSEXT_25'



Thanks,



Brad Smallridge AiVision


attribute IOSTANDARD of cam1_x0_obufds:label is "LVDSEXT_25";

Is it that you need quotes?

Dunno, try it! HTH, Syms.

That's it! Argh!

Thanks,

Brad

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