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Altera_Forum
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10 years ago

arithmetic mode for LE from vhdl

I have searched many threads for the solution and the answers were incomplete. So i try to do some investigation. this code in vhdl definitely put your counter in arithmetic mode for LE. if you ha...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
10 years ago

It can only use the cin if count-en is generated on a LE in the same LE column so that it can put the signal on the carry chain, which I assume it isn't.

Why do you use count en as the add word? This will just get converted to logic 1 because the register only enables the the input when enable is 1, hence you always add 1.