16位输入cordic算法的verilog代码与medelsim测试代码
时间: 2024-05-14 16:18:23 浏览: 14
以下是一个简单的16位CORDIC算法的Verilog代码和ModelSim测试代码。
Verilog代码:
```verilog
module cordic_16bit (
input signed [15:0] x,
input signed [15:0] y,
output signed [15:0] cos_out,
output signed [15:0] sin_out,
input clk,
input rst
);
reg signed [15:0] x_reg;
reg signed [15:0] y_reg;
reg signed [15:0] z_reg;
reg signed [15:0] dx_reg;
reg signed [15:0] dy_reg;
reg signed [15:0] dz_reg;
reg [3:0] i;
reg [3:0] j;
assign cos_out = x_reg;
assign sin_out = y_reg;
always @(posedge clk) begin
if (rst) begin
x_reg <= 0;
y_reg <= 0;
z_reg <= 0;
dx_reg <= y;
dy_reg <= x;
dz_reg <= 0;
i <= 0;
j <= 13;
end else begin
if (z_reg > 0) begin
x_reg <= x_reg + (dx_reg >> j);
y_reg <= y_reg - (dy_reg >> j);
z_reg <= z_reg - (1 << j);
end else begin
x_reg <= x_reg - (dx_reg >> j);
y_reg <= y_reg + (dy_reg >> j);
z_reg <= z_reg + (1 << j);
end
dx_reg <= dx_reg - (y_reg >> j);
dy_reg <= dy_reg + (x_reg >> j);
dz_reg <= dz_reg + (1 << j);
i <= i + 1;
j <= j - 1;
end
end
endmodule
```
ModelSim测试代码:
```verilog
`timescale 1ns / 1ps
module cordic_16bit_tb;
reg signed [15:0] x;
reg signed [15:0] y;
wire signed [15:0] cos_out;
wire signed [15:0] sin_out;
reg clk;
reg rst;
cordic_16bit dut (
.x(x),
.y(y),
.cos_out(cos_out),
.sin_out(sin_out),
.clk(clk),
.rst(rst)
);
initial begin
clk = 0;
forever #5 clk = ~clk;
end
initial begin
rst = 1;
x = 0;
y = 0;
#10 rst = 0;
#10 x = 16384; y = 0; // cos(0) = 1
#100;
x = 0; y = 16384; // sin(90) = 1
#100;
x = -16384; y = 0; // cos(180) = -1
#100;
x = 0; y = -16384; // sin(270) = -1
#100 $stop;
end
endmodule
```
这个测试代码会对CORDIC算法进行四个测试:计算cos(0)、sin(90)、cos(180)和sin(270)。你可以根据你的需要进行修改。