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Altera_Forum's avatar
Altera_Forum
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18 years ago

Functional simulation problem

I wrote my first design in AHDL and it complied fine. When i did the functional simulation. I added various nodes in the simulation which contained both Input/Output pins and buried registers. My pro...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
18 years ago

Hi,

Under node finder in vwf, if you filter to "Registers post fitting", you can see that what you are look for is not there. This is because the registers have been compiled out by quartus.

Scanning over your code I can see whats wrong is on line 75

Serial_Out_D[].clrn = GND;

clrn is active low, so the Serial_Out_D reg is getting removed. This needs to be tied to VCC.

After changing this, I can now see all the registers in simulation.

Regards