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Altera_Forum's avatar
Altera_Forum
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15 years ago

testbench output control, stupid question

Hi to all! I have a quite stupid question, I think. I have a testbench, where I force the output to the right result. If my code works how I expect, the output would be exactly equal to the on...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
15 years ago

Are you forcing the output from the testbench or inside the entity?

For the answer you want, add this to the testbench:

error <= '1' when to_X01(forced_output) = 'X' else '0';

the to_X01 function will mean 'U', 'W', 'Z' and '-' are converted to 'X' too.