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Altera_Forum's avatar
Altera_Forum
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8 years ago

"For... Loop" simulates differently then discrete assignments?

Can someone help me understand why the first code snippet works as I would expect it, but the second snippet simulation holds all values at 'U'? Note: WRITE_ENABLE_FIBRE_REG(0) is assigned in a di...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
8 years ago

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you MUST assign ALL bits for that signal inside the process. This is why your temporary version works, as you do assign WRITE_ENABLE_FIBRE_REG_TEST inside the loop.

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Thanks, that is interesting. I'm surprised I didn't see a 'multiple driver' warning or something similar. At least I'll know to avoid doing that going forward.