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Finder/Fitter VHDL Constants
There are 3 VHDL packages which contain constants derived from the ZPD basic
parameters such as the minimum pT, number of
1/pT bins, etc.:
- finder.finder_lut_init
- finder.prm_constants
- fitter.lut_init
The VHDL for these packages is generated by
dumpZpdLut -v
Which is part of the L1DctConfig package.
This will generate 3 files:
- finder_lut_init_package_body.vhd
- prm_constants_package.vhd
- fitter_lut_init_pkg_body.vhd
If you need to change the ZPD basic parameters (e.g. to change the minimum
pT or the number of tanλ bins), edit
L1DctConfig/dumpZpdLut to
change the basic parameter values from their defaults, compile, and re-run.
Then copy the generated files:
- finder_lut_init_package_body.vhd → src/finder/finder_lut_init/_package_body.vhd
- prm_constants_package.vhd → src/finder/prm_constants/_package.vhd
- fitter_lut_init_pkg_body.vhd → src/fitter/fitter_lut_init/_package_body.vhd
Note that the PRM constants are the package header (_package.vhd) while the
others are the package body (_package_body.vhd). The somewhat odd naming
scheme is due to a combination of history and Mentor Graphics HDL Designer
Series pickiness about what packages are called.
Then follow the
synthesis instructions to remake the Finder/Fitter firmware.
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