How can I use a Verilog HDL header file that contains only parameter values?

Description

Use the 'include directive to include all your header files within the module body.

When synthesizing header files in the Quartus® Prime Software, do not add the header file to the list of files in the Quartus® Prime project. Header files should not be analyzed as separate Verilog HDL files. Instead, use the `include directive so that the header file is correctly analyzed when the Quartus® Prime Software analyzes the top-level file.

If you add a header file containing only parameter values to the list of files in the Quartus® Prime project, you may see an error like the following:

Error (10839): Verilog HDL error at <filename>.v(<line number>): declaring global objects is a SystemVerilog feature

Resolution

The following example instantiates an lpm_dff function with its parameter set in another file (param.v).

. . .
//file : dffveri.v

module dffveri (q, data, clock);
`include "param.v"

//parameter width = 5;
//coming from param.v

input [width-1:0] data;
input clock;
output [width-1:0] q;

lpm_dff dfff (.data(data), .clock(clock), .q(q));
defparam dfff.lpm_width = width;

endmodule
. . .

//file param.v

parameter width = 5;