I'm new to Verilog, I'd really appreciate it if someone could help me figure this error out:
I'm trying to write a test bench PU_tb, which is instantiating this module:
PU_conv #(
.image_width ( image_width ),
.image_height ( image_height ),
.kernel_width ( kernel_width ),
.kernel_height ( kernel_height )
) convolution (
.ACLK ( ACLK ), //input
.image ( image ), //input
.kernel ( kernel ), //input
.result ( result ) //output
);
The module PU_conv looks like this:
module PU_conv
#( //Parameters
parameter integer image_width = 10,
parameter integer image_height = 4,
parameter integer kernel_width = 2,
parameter integer kernel_height = 2
)( //PORTS
input wire ACLK,
input wire [0:image_width][image_height:0] image,
input wire [0:kernel_width][kernel_height:0] kernel,
output reg [0:image_width][image_height:0] result
);
I'm getting this error:
error: Unable to bind parameter 'image_height' in 'PU_tb'
error: Unable to bind parameter 'image_width' in 'PU_tb'
error: Unable to bind parameter 'kernel_height' in 'PU_tb'
error: Unable to bind parameter 'kernel_width' in 'PU_tb'
The kernel and image widths and heights are declared as follows:
reg[5:0] param_kw;
reg[5:0] param_kh;
reg[5:0] param_iw;
reg[5:0] param_ih; ....
integer kernel_width, kernel_height, image_width, image_height;
always @(param_kw)
kernel_width = param_kw;
always @(param_kh)
kernel_height = param_kh;
always @(param_iw)
image_width = param_iw;
always @(param_ih)
image_height = param_ih;
What am I doing wrong?
The following code works fine. Make sure you have declared parameters correctly in top/tb module.
module PU_conv
#( //Parameters
parameter integer image_width = 10,
parameter integer image_height = 4,
parameter integer kernel_width = 2,
parameter integer kernel_height = 2
) ( //PORTS
input wire ACLK,
input wire [0:image_width][image_height:0] image,
input wire [0:kernel_width][kernel_height:0] kernel,
output reg [0:image_width][image_height:0] result
);
initial
begin
$display("image_width = %0d image_height = %0d",image_width,image_height);
$display("kernel_width = %0d kernel_height = %0d",kernel_width,kernel_height);
end
endmodule
module top();
parameter integer image_width = 8;
parameter integer image_height = 7;
parameter integer kernel_width = 6;
parameter integer kernel_height = 5;
wire ACLK;
wire [0:image_width][image_height:0] image;
wire [0:kernel_width][kernel_height:0] kernel;
reg [0:image_width][image_height:0] result;
PU_conv #(
.image_width ( image_width ),
.image_height ( image_height ),
.kernel_width ( kernel_width ),
.kernel_height ( kernel_height )
) convolution (
.ACLK ( ACLK ), //input
.image ( image ), //input
.kernel ( kernel ), //input
.result ( result ) //output
);
endmodule
Multi dimensional arrays as inputs are supported in SystemVerilog only. Following is the output display:
// Overridden parameters
image_width = 8 image_height = 7
kernel_width = 6 kernel_height = 5
Similar question is posted in Verilog Parameter over ridding.