FIFO 位宽转换

从8位转32位

module tb_fifo();reg clk,rst;   
initial beginclk=0;forever #4.545 clk=~clk;
end
initial beginrst=1;#9.09 rst=0;
endreg [31:0] cnts;
always @ (posedge clk or posedge rst)
beginif(rst)begincnts <= 32'd0;endelsebegincnts <= cnts + 1'b1;end
endreg  [7:0] din;
reg  wr_en;reg  rd_en;
wire [31:0] dout;wire [12:0] rd_data_count;
wire [14:0] wr_data_count;fifo_ICBR_8_32 FIFO (.rst(rst),                      // input wire rst.wr_clk(clk),                // input wire wr_clk.rd_clk(clk),                // input wire rd_clk.din(din),                      // input wire [7 : 0] din.wr_en(wr_en),                  // input wire wr_en.rd_en(rd_en),                  // input wire rd_en.dout(dout),                    // output wire [31 : 0] dout.full( ),                    // output wire full.empty( ),                  // output wire empty.rd_data_count(rd_data_count),  // output wire [12 : 0] rd_data_count.wr_data_count(wr_data_count)  // output wire [14 : 0] wr_data_count
);always @ (posedge clk or posedge rst)
beginif(rst)begindin <= 8'd0;wr_en <= 1'b0;rd_en <= 1'b0;endelsebegincase(cnts)32'd33: begin din<=8'h11;wr_en<=1'b1; end32'd34: begin din<=8'h22;wr_en<=1'b1; end32'd35: begin din<=8'h33;wr_en<=1'b1; end32'd36: begin din<=8'h44;wr_en<=1'b1; end32'd37: begin            wr_en<=1'b0; end32'd60: begin rd_en<=1'b1; end32'd61: begin rd_en<=1'b0; enddefault:begin din<=din;wr_en<=wr_en;rd_en<=rd_en; endendcaseend
end