我目前正在使用 Verilog 生成随机数。消息来源表明,使用线性反馈移位寄存器是随机化 MSB 的最佳方法之一。所以我决定编写一个 LFSR 代码和测试平台。片段如下:
module lfsr_counter(clk, reset, ce, lfsr_done);
input clk, reset, ce;
output lfsr_done;
reg lfsr_done;
reg [10:0] lfsr;
initial lfsr_done = 0;
wire d0,lfsr_equal;
xnor(d0,lfsr[10],lfsr[8]);
assign lfsr_equal = (lfsr == 11'h359);
always @(posedge clk,posedge reset) begin
if(reset) begin
lfsr <= 0;
lfsr_done <= 0;
end
else begin
if(ce)
lfsr <= lfsr_equal ? 11'h0 : {lfsr[9:0],d0};
lfsr_done <= lfsr_equal;
end
end
endmodule
module testbench();
reg clk, reset, ce;
wire lfsr_done;
lfsr_counter dut(clk, reset, ce, lfsr_done); // Design Under Test
initial
begin
reset = 0;
clk = 1;
ce = 0;
#100
ce = 1;
#200 $finish;
end
//Generate Clock
always #10 clk = !clk;
endmodule
但我不断收到这些解析错误:
我真的不明白。我正在使用 Verilogger Pro 顺便说一句