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BitGen Syntax
The following syntax creates a bitstream from your NCD file:
bitgen [options] infile[.ncd] [outfile] [pcf_file.pcf]
options is one or more of the options listed in "BitGen Options".
infile is the name of the NCD design for which you want to create the bitstream. You may specify only one design file, and it must be the first file specified on the command line.
Note: You do not have to use an extension. If you do not use an extension, then .ncd is assumed. If you do use an extension, then the extension must be .ncd.
outfile is the name of the output file. If you do not specify an output file name, BitGen creates a .bit file in your input file directory. If you specify any of the following options, the corresponding file is created in addition to the .bit file. If you do not specify an extension, BitGen appends the correct one for the specified option.
A report file containing all BitGen output is automatically created under the same directory as the output file. The report file has the same root name as the output file and a .bgn extension.
pcf_file is the name of a physical constraints file. BitGen uses this file to interpret CONFIG constraints, which control bitstream options. These CONFIG constraints override default behavior and can be overridden by configuration options. See "–g (Set Configuration)." BitGen automatically reads the .pcf file by default. If the PCF is the second file specified on the command line, it must have a .pcf extension. If it is the third file specified, the extension is optional; .pcf is assumed. If a .pcf file name is specified, it must exist; otherwise, the input design name with a .pcf extension is assumed.
Type the following syntax to see a complete list of BitGen command line options and supported devices:
bitgen —h
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