Assigning Packed Type to Unpacked Type

SystemVerilog
, , ,
1

I am trying to take input/output data from my FFT and pass it into my checker function (which I have imported), but I am getting the following error:

Cannot assign a packed type ‘bit[31:0]’ to an unpacked type 'bit[31:0] []



module tb_top; 
...
        bit [31:0] data_in_real [$];
	bit [31:0] data_in_imag [$];
	bit [31:0] data_out_real [$];
	bit [31:0] data_out_imag [$];

initial begin : tester
	   
	   bit  [63:0] data_out_queue [$];
	   bit  [63:0] data_in_queue [$];
	   
	   bit [63:0] in_data_fq;
	   bit [63:0] out_data_fq;
	   
	   bit [63:0] in_real;
	   bit [63:0] in_imag;
	   bit [63:0] out_real;
	   bit [63:0] out_imag;
...

                @(posedge clk);
                repeat (128) begin : random_data_loop
	        @(posedge clk);
	        s_axis_data_tdata = get_data();	
		data_in_queue.push_back(s_axis_data_tdata);
			
	        if(i == 127) begin
	            s_axis_data_tlast = 1'b1;
	            i = 0;
	            @(posedge clk);
	            s_axis_data_tlast = 1'b0;
	        end
			
		data_out_queue.push_back(m_axis_data_tdata);
		i++;
			
		in_data_fq = data_in_queue.pop_front();
		out_data_fq = data_out_queue.pop_front();

			
		data_in_real = in_data_fq[31:0];
		data_in_imag = in_data_fq[63:32];
		data_out_real = out_data_fq[31:0];
		data_out_imag = out_data_fq[63:32];
			
		DPI_fft_checker(dpic_h, data_in_real, data_in_imag, data_out_real, data_out_imag, nrms);
			
	    end	: random_data_loop
			
		#1000
		$stop;
		
		end : tester

Any help would be massively appreciated!

2

In reply to ms153:

We could certainly help you better if you told us which line the error was on, and provided the declarations of all variables/functions involved in the error.

You can do

data_in_real = {in_data_fq[31:0]};
data_in_imag = {in_data_fq[63:32]};
data_out_real = {out_data_fq[31:0]};
data_out_imag = {out_data_fq[63:32]};

or

data_in_real.push_back(in_data_fq[31:0]);
data_in_imag.push_back(in_data_fq[63:32]);
data_out_real.push_back(out_data_fq[31:0]);
data_out_imag.push_back(out_data_fq[63:32];)
3

You can use push_back instead:

"
data_in_real = in_data_fq[31:0];
data_in_imag = in_data_fq[63:32];
data_out_real = out_data_fq[31:0];
data_out_imag = out_data_fq[63:32];
"

data_in_real.push_back(in_data_fq[31:0]);

…

4

In reply to dave_59:

That seems to have worked, silly me!
Thanks