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Altera_Forum's avatar
Altera_Forum
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8 years ago

Passing parameter/generic to the top level in Quartus/tcl?

I'm trying to pass a git sha1 as a parameter to the top level in Quartus tcl I added a source probe: gits u_gits (.probe (160'habbaface000000000000000000000000acdcba...
Altera_Forum's avatar
Altera_Forum
Icon for Honored Contributor rankHonored Contributor
8 years ago

Up to 32-bit integers... I find it a bit odd. They have a parser capable of parsing Verilog numbers so why not use this to parse the expression passed by the set_parameter tcl command.

In Verilog it's possible to use the pre-processor as a work around: 

module top
`ifdef M_GIT_SHA1
 # ( parameter GIT_SHA1 = `M_GIT_SHA1)
`else
 # ( parameter GIT_SHA1 = {20{8'h42}})
`endif
   ( input wire        pad_clk_50m_fpga,

And then set: 

set_global_assignment -name VERILOG_MACRO "M_GIT_SHA1=160'h$sha1"

in the build script, which yields: 

$./read-gits.sh 
GIT_SHA1: 1B15850CADD9D969468FEE6669D86837E7B19239
$git rev-parse HEAD
1b15850cadd9d969468fee6669d86837e7b19239