Technical data

Basic VHDL simulation

Tutorial: Using ModelSim PE Getting Started with ModelSim PE

run @ <timestep>

Use the

run

command with @ to run to time 5000:

run @5000

Step 20.

To see the effect of the break feature, you are now going to start a long simulation run and then

click the

BREAK

button during the run to stop the simulator. On the menu bar, select

Run >

Run Forever

. (The

run -a

command produces the same effect.)

Step 21.

To stop the simulator while it is running, click the

BREAK

button. This updates the Source

window; an arrow will be pointing to the next VHDL statement to be executed.

Note:

Your window won’t look like the illustration above. Your simulation will probably stop at a

different point.

Step 22.

If your Source window is hard to read because the standard tabs are too big for the window size,

change the tabs with the

Options > Simulation Options

menu sequence. Select the

Misc

tab

in the

Simulation Options

dialog box, then change the

Tab Width

to 2 characters, leaving the

other options unchanged. Click

, then

Yes

, to save your changes.