Actel ProASIC3/E, Руководство пользователя, Страница: 42 / 106

Quick Start Tutorial
42 ProASIC3/E Starter Kit User’s Guide and Tutorial
2. Draw Waveforms
3. Export the Testbench
Import Signal Information
To launch WaveFormer Lite and import signal information:
Right-click the Top.vhd file in the Design Hierarchy tab and select Create Stimulus > HDL Source files (source files) .
WaveFormer Lite launches with the port signals in the Diagram window, as shown in Figure 7-12 .
Figure 7-12. WaveFormer Lite Timing Diagram Window
Draw Waveforms
The state buttons are the buttons with the waveforms drawn on their face: HIGH, LOW, TRIstate, VALid, INValid,
WHI weak high, and WLO weak low, as shown in
Figure 7-13 .
Figure 7-13. State Buttons
When a state button is activated, it is pushed in and colored red. The active state is the type of waveform that is drawn
next. Click a state button to activate it.
The state buttons automatically toggle between the two most recently activated states. The state with the small red “T”
above the name will be the toggle state. The initial activated state is HIGH and the initial toggle state is LOW.
Signal edges are automatically aligned to the closest edge grid when signals are drawn using the mouse. Control the edge
grid from the
Options > Grid Settings menu item.
To draw a waveform:
1. Select the High state and place the mouse cursor inside the Diagram window at the same vertical row as the signal
name.
2. Click the mouse button. This draws a waveform from the end of the signal to the mouse cursor. The red state button
on the button bar determines the type of waveform drawn. The cursor shape also mirrors the red state button.
3. Move the mouse to the right and click again to draw another segment.