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Altera_Forum's avatar
Altera_Forum
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15 years ago

A_en is 'X' problems

Hi there, i have wrote some VHDL program in QuartusII (10.1)as custom instruction for NIOSII and implemented a SOPC system with Nios II. Then i go to the EDA (eclipse) generate a hallo world progr...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
15 years ago

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'X' usually occurs when you drive one signal from multiple places. You'll have to look at the drivers of A_en.

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thx for reply, but what is A_en, i didn't define this signal...:(