How to create decimal array parameter with width set by another parameter? - verilog

Question

My module has a configurable width input of signals sensor_line[WIDTH-1:0] where WIDTH is parameter.
For each sensor_line I have a recorder module instantiated with a generate block in a for loop.
I need to pass a decimal number parameter to this recorder which is different for each sensor_line.
I need to create some decimal array parameter to give to my module in the top, which it’s width will be aligned with the WIDTH parameter. I don’t mind if I need to match the given array size myself as long as I can do it from the top when instantiating my module.
Looking for a solution, I found only for passing an array of bits (binary value).
For example, to pass 5 bits for each sensor_line, a code like this can be used:
module my_module #(
parameter WIDTH = 4, // number of input lines
parameter [4:0] CYCELS [WIDTH-1:0] = '{ WIDTH{5'b0}}
)
(
Input clk;
input [WIDTH-1:0] sensor_line;
…
);
logic [WIDTH-1:0] sensor_line_out;
…
genvar i;
generate
for (i=0; i< WIDTH; i=i+1) begin : sensor_sync
recorder #(
. CYCELS(CYCELS [(i+1)*5:i*5])
)
recorder_instance(
.in(sensor_line[i]),
.out(sensor_line_out[i]),
.clk(clk),
…
);
end
endgenerate
…
endmodule
How can I pass decimal values to the recorder module, not bits like in the example, like passing integer array in C and then point to the array at index [i] and at the end instance my module like this:
my_module #(
.WIDTH(4), // number of input lines
.CYCELS([2,3,5,4])
) my_module_1 (
...
)
my_module #(
.WIDTH(3), // number of input lines
.CYCELS([3,2,2])
) my_module_2 (
...
)

Answer 1

The syntax you used to pass an array of decimal values is incorrect. For example, change:
.CYCELS([2,3,5,4])
to:
.CYCELS('{2,3,5,4}) // an assignment pattern
or
.CYCELS({2,3,5,4}) // an unpacked array concatenation
Here is actual code that compiles:
module my_module #(
parameter WIDTH = 4, // number of input lines
parameter [4:0] CYCELS [WIDTH-1:0] = '{default:'0}
);
for (genvar i=0; i< WIDTH; i++) begin : sensor_sync
initial $display("%m CYCELS[%0d]=%0d", i, CYCELS[i]);
end
endmodule
module top;
my_module #(
.WIDTH(4), // number of input lines
.CYCELS('{2,3,5,4})
) my_module_1 (
);
my_module #(
.WIDTH(3), // number of input lines
.CYCELS('{3,2,2})
) my_module_2 (
);
endmodule
Output:
top.my_module_1.sensor_sync[0] CYCELS[0]=4
top.my_module_1.sensor_sync[1] CYCELS[1]=5
top.my_module_1.sensor_sync[2] CYCELS[2]=3
top.my_module_1.sensor_sync[3] CYCELS[3]=2
top.my_module_2.sensor_sync[0] CYCELS[0]=2
top.my_module_2.sensor_sync[1] CYCELS[1]=2
top.my_module_2.sensor_sync[2] CYCELS[2]=3