伊卡洛斯不知道如何解析localparam数组？

Question

I am using v10 of Icarus Verilog, Windows 8.1 and am having troubles compiling 1D arrays like:

localparam [15:0] A[0:5]  = {
    0,
    10920, 
    21840,
    32760,
    43680,
    54600
};

or 2D array like:

localparam [1:0] B[0:5][0:2] = {
    {2'b00, 2'b10, 2'b01},
    {2'b10, 2'b00, 2'b01},
    {2'b10, 2'b01, 2'b00},
    {2'b00, 2'b01, 2'b10},
    {2'b01, 2'b00, 2'b10},
    {2'b01, 2'b10, 2'b00}
};

When I try to compile this using iverilog inside command prompt like: iverilog -o tb.vvp ".v files here" I get the following errors:

tb.v:39: syntax error
tb.v:39: error: syntax error localparam list.
tb.v:54: syntax error
tb.v:54: error: syntax error localparam list.

Lines 39 and 54 are lines where upper two arrays are located.

What is wrong and how can I fix this ridicilous error?

Answer 1

Verilog does not support unpacked arrayed parameters/localparams; SystemVerilog does. See:

• How to initialize parameterized array parameter using loop/generate in verilog?
• How to initialize parameter array in verilog?

Icarus Verilog (iverilog) has limited SystemVerilog support. EDAplayground currently includes Icarus Verilog 0.10.0 11/23/14, which does not support unpacked arrayed parameters with SystemVerilog enabled. You can try with the latest version of Icarus. Enable SystemVerilog by changing your file extinctions from .v to .sv , you may need to add the -g2012 compile option.

If that doesn't work, you will need to convert the array into a large vector. You can slice the array with the +: operator (Added in Verilog 2001 and supported with Icarus Verilog. See Indexing vectors and arrays with +: ). Or change to another simulator that supports SystemVerilog.