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LChow3's avatar
LChow3
Icon for Occasional Contributor rankOccasional Contributor
5 years ago

ModelSim - vector input not showing the correct binary

Please see the attached file. It's a 10's complement for 4-bit BCD. I have a 4-bit vector input, and 4-bit vector output. But, the vector input is not showing the correct binary number. It shows all...
LChow3's avatar
LChow3
Icon for Occasional Contributor rankOccasional Contributor
5 years ago

If I delete D, drag D from Object pane to Wave window, I couldn't key in the D binary values.

RichardT_altera's avatar
RichardT_altera
Icon for Super Contributor rankSuper Contributor
5 years ago

Do you mean to provide input stimulus? If so, you can right click the D in the wave window, select force and insert value. Then run simulation.

Insert one by one will become a tedious job, instead you can insert example line in the transcript.

VSIM> force -deposit /D 2#0, 2#1 20, 2#0 40, 2#1 60, 2#1 80

VSIM> run 200 ns

the line change D to binary value 0 (2#0) starting from time instant now. Then, 20 ns later, change the input to 1 (2#1 20).