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Chapter 16: Qsys Design Example 16–15

Simulating the Qsys System

August 2014 Altera Corporation IP Compiler for PCI Express User Guide

7. Open the file altera_pcie_bfm.v in a text editor.

8. Replace the following line of code:

parameter PIPE_MODE_SIM = 1’b1;

with the following replacement code:

parameter PIPE_MODE_SIM = 1’b0.

9. Save and close the file.

In the Qsys design flow, the

altgxb_reconfig

block must be instantiated outside the

Qsys system. Therefore, the design example Qsys system does not include an

altgxb_reconfig

block. When simulating the Qsys system in serial simulation mode,

you must force the

busy_altgxb_reconfig

signal to zero to ensure that the reset

controller never detects a

busy_altgxb_reconfig

signal falling edge; because the

transceiver reconfiguration block is not instantiated, the reset controller subsequent

actions would lead to failure. In PIPE mode, the

altgxb_reconfig

signal is ignored. In

the full design example, the altgxb_reconfig module is instantiated outside the Qsys

system.

Running Simulation

To run the Qsys testbench, follow these steps:

1. Start the ModelSim simulator.

2. In the ModelSim simulator, change directories to your testbench directory,

<project_dir

>/hip_s4gx_gen1x8_qsys/testbench. Call this directory <testbench

directory>.

3. To run the setup script, type the following command at the simulator command

prompt:

do mti_setup.tcl

4. To compile all the files and load the design in Modelsim, type one of the following

commands at the simulator prompt:

■ To prepare to debug with waveforms, type the following command:

ld_debug r

■ To prepare to simulate in optimized mode, type the following command:

ld r

5. To set up a waveform file if you have not already done so, follow these steps:

a. In the ModelSim Objects tab, highlight files you wish to display in your

simulation waveform.

b. Right-click on your selected signals, select Add > To Wave and click Selected

Signals. The Wave tab displays with your selected signals.

c. On the File menu, click Save Format. The Save Format dialog box appears.

d. Change Pathname to <testbench directory>/

wave_presets.do

e. Click OK.

Your simulation run is set up to display these signals. In future runs, you can skip

step 5.

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