Source: http://blog.sina.com.cn/s/blog_3ef1296d0101aob6.html
three, FPGA pin allocation file Preservation method
When using someone else's project, sometimes can't find his pin file, but can save his already bound pin, output to the file.
method One:
View pin bindings, Quartus-Assignment, Pins, open the FPGA pin interface, where the pin file can be saved in CSV format (tabular format) and TCL format in the menu of this interface.
Step: Select Save name and save format with Export ....
Method Two:
The direct output pin configuration, assignmengt-I, export assignmengt, can be saved in QSF format, which can be viewed in Notepad, where the PIN information is also included in the file. Note: When you save, a new folder is created under the original project folder.
As for the other configuration of the components, can be set in the Qsf file and Tcl file with the statement, also can be set in assignment, device, interface.
Load:
With an existing pin file, you can select the pin file to load in the Import Assignment option assignment. At this point, you can load QSF and CSV (or txt) files.
saved CSV (TXT) documents, QSF file and Tcl the difference between files:
csv (TXT) file: contains all pin information of the chip, including assigned and unassigned;
QSF file: contains pin assignment information and chip information;
Tcl file: contains only the assigned PIN information.
(Differences between QSF files, TCL files, and CSV (TXT) files) FPGA pin Assignment File save, import and Export method