Altera Nios II, Руководство по разработке аппаратного обеспечения

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1–30 Chapter 1: Nios II Hardware Development
Creating the Design Example
Nios II Hardware Development Tutorial May 2011 Altera Corporation
To ensure the design meets timing, perform the following steps:
1. On the File menu, click Open .
2. In the Files of type list, select Script Files (*.tcl, *.sdc, *.qip) .
3. Browse to locate <design files directory> /hw_dev_tutorial.sdc and click Open . The
file opens in the text editor.
4. Locate the following
create_clock
command:
create_clock -name sopc_clk -period 20 [get_ports PLD_CLOCKINPUT]
5. Change the period setting from 20 to the clock period (1/frequency) in
nanoseconds of the oscillator driving the clock pin.
6. On the File menu, click Save .
7. On the Assignments menu, click Settings . The Settings dialog box appears.
8. Under Category , click TimeQuest Timing Analyzer .
Figure 1–18 shows the TimeQuest Timing Analyzer page of the Settings dialog box.
9. Next to File name , click the browse ( ... ) button.
10. Browse to locate <design files directory> /hw_dev_tutorial.sdc and click Open to
select the file.
Figure 1–18. TimeQuest Timing Analyzer Settings