Technical data

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Tcl/Tk and ModelSim

118

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ModelSim EE Lessons ModelSim EE Tutorial

The result is a traffic intersection interface similar to this illustration:

wm widget

Calls to the op-

erating system

window man-

ager to create

the "traffic"

window.

canvas widget

The background,

lines and traffic

lights are created

with the canvas

widget.

button widgets

Each button in-

vokes the indi-

cated VSIM run

or break com-

mand.

label widget

A static label is add-

ed to the end of the

connect_lights pro-

cedure to indicate

connection to the

simulator.

entry widget

The entry widget

(contained within

a frame widget)

can facilitate en-

try, or in this case,

provides a display

for a VSIM exam-

ine command.

frame and

scale widget

A scale widget

within a frame

widget creates

an analog entry

device for a min-

imum to a maxi-

mum value and

invokes the

VSIM force com-

mand