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C HAPTER 4: P LACE AND R OUTE
U SING I NCREMENTAL C OMPILATION
You can start a full compilation in the Quartus II software, which includes
the Fitter module, or you can start the Fitter separately. You must run
Analysis & Synthesis successfully before starting the Fitter separately. For
information about performing a full compilation, refer to “Graphical User
Interface Design Flow” on page 3 in Chapter 1, “Design Flow.”
!
Using the quartus_fit executable
You can also run the Fitter separately at the command prompt or in a script by using
the quartus_fit executable. You must run the Analysis & Synthesis executable
quartus_map before running the Fitter.
The quartus_fit executable creates a separate text-based report file that can be
viewed with any text editor.
If you want to get help on the quartus_fit executable, type one of the following
commands at the command prompt:
quartus_fit -h r
quartus_fit -help r
quartus_fit --help= <topic name>
r
Using Incremental Compilation
The Quartus II software performs incremental compilation to reuse
previous compilation results for unchanged entities in the design. For more
information, refer to “Design Methodologies and Planning” on page 14 in
Chapter 1, “Design Flow.”
The following steps describe the basic flow for performing an incremental
compilation:
1.
2.
3.
Perform Analysis & Elaboration.
Specify one or more entities of the project as partitions. Refer to
“Creating Design Partitions” on page 57 in Chapter 4, “Constraint
Entry.”
Set the appropriate Netlist Type for the partitions. To preserve
compilation and placement results, set the Netlist Type for the
partitions to Post-Fit .
A LTERA C ORPORATION
I NTRODUCTION TO THE Q UARTUS II S OFTWARE
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