在verilog中的窦

Question

所以我需要得到正弦波形。 如果我写了x和y轴的值在2pi范围内

如何在这个范围内得到窦的波形？

module sinus1(in,clk,res,out);
input clk,res;
input [7:0]in;
output reg [7:0]out;
always @(posedge clk)
if (res)
case (in)
8'b00000000: out<=8'b10000000;
8'b00000001: out<=8'b10000011;
8'b00000010: out<=8'b10000110;
8'b00000011: out<=8'b10001001;
8'b00000100: out<=8'b10001100;
8'b00000101: out<=8'b10001111;
8'b00000110: out<=8'b10010010;
...
...
...
8'b11111111: out<=8'b01111101;
endcase
else out<=8'b00000000;
endmodule

module testbench;
reg clk,res;
reg [7:0]in;
sinus1 sinusoid(in,clk,res,out);
always #5 clk=~clk
initial
begin
clk=0;res=0;
#5 res=1;
#5000 $finish;
end
endmodule

Answer 1

如果要获取每个输入的值，您应该扫描测试平台中的值，可能是0到255.这是在Eda Playground上执行此操作的链接：

http://www.edaplayground.com/x/2bx

输出：

in=00000000, out = sin(in) = 10000000
in=00000001, out = sin(in) = 10000011
in=00000010, out = sin(in) = 10000110
in=00000011, out = sin(in) = 10001001
in=00000100, out = sin(in) = 10001100
in=00000101, out = sin(in) = 10001111
...