FFT64點(diǎn)傅里葉變換verilog蝶形運(yùn)算

名稱：FFT64點(diǎn)verilog傅里葉變換（代碼在文末付費(fèi)下載）

軟件：Quartus

語(yǔ)言：Verilog

代碼功能：

使用verilog代碼實(shí)現(xiàn)64點(diǎn)FFT變換，使用蝶形運(yùn)算實(shí)現(xiàn)傅里葉變換。

演示視頻：

FPGA代碼資源下載網(wǎng)：hdlcode.com

部分代碼展示

`timescale?1ns?/?1ps
//64點(diǎn)FFT
module?top(input?clk,
??input?rst,
??input?[7:0]?data_in_r,
??input?[7:0]?data_in_i,
??input?data_in_ready,
??output?[19:0]?data_out_r,
??output?[19:0]?data_out_i,
??output?reg?data_out_ready
);
wire??working;
reg?[5:0]?count;
reg?[5:0]?count_out;
reg?flag;
reg?working_flag_0;
reg?working_flag_1;?
reg?working_flag_2;
reg?working_flag_3;?
reg?working_flag_4;
reg?working_flag_5;?
reg?working_flag_6;
reg?working_flag_7;?
assign??working?=?data_in_ready?||?working_flag_1;
always?@(posedge?clk)
begin
if(rst)
begin
count<=6'd0;
end
else
begin
if(!data_in_ready)
count<=6'd0;
else
begin
if(count?<?6'd63)
count<=count+6'b1;
else
count?<=?count;
end
end
end
always@(posedge?clk)
begin
if(rst)
working_flag_0?<=?0;
else
if(working?&&?working_flag_1?==?0)
working_flag_0?<=?1;
else
working_flag_0?<=?0;
end
always@(posedge?clk)
begin
if(rst)
flag?<=?0;
else
if(count?==?6'd62?&&?flag?==?0)
flag?<=?1;
else
flag?<=?0;
end
always@(posedge?clk)
begin
if(rst)
working_flag_1?<=?0;
else
if(count?==?6'd63?&&?flag?==?1)
working_flag_1?<=?1;
else
working_flag_1?<=?0;
end
always@(posedge?clk)
begin
if(rst)
working_flag_2?<=?0;
else
if(working_flag_1)
working_flag_2?<=?1;
else
working_flag_2?<=?0;
end
always@(posedge?clk)
begin
if(rst)
working_flag_3?<=?0;
else
if(working_flag_2)
working_flag_3?<=?1;
else
working_flag_3?<=?0;
end
always@(posedge?clk)
begin
if(rst)
working_flag_4?<=?0;
else
if(working_flag_3)
working_flag_4?<=?1;
else
working_flag_4?<=?0;
end
always@(posedge?clk)
begin
if(rst)
working_flag_5?<=?0;
else
if(working_flag_4)
working_flag_5?<=?1;
else
working_flag_5?<=?0;
end
always@(posedge?clk)
begin
if(rst)
working_flag_6?<=?0;
else
if(working_flag_5)
working_flag_6?<=?1;
else
working_flag_6?<=?0;
end
always@(posedge?clk)
begin
if(rst)
working_flag_7?<=?0;
else
if(working_flag_6)
working_flag_7?<=?1;
else
if(count_out?<?6'd63?&&?working_flag_7?==?1)
working_flag_7?<=?1;
else
working_flag_7?<=?0;
end
always@(posedge?clk)
begin
if(rst)
count_out?<=?0;
else
if(working_flag_6)
count_out?<=?0;
else
if(count_out?<?6'd63)
count_out?<=?count_out?+?1;
else
count_out?<=?0;
end
always@(posedge?clk)
begin
if(rst)
data_out_ready?<=?0;
else
if(working_flag_7?==?1?&&?data_out_ready?==?0)
data_out_ready?<=?1;
else
if(count_out?<?6'd63)
data_out_ready?<=?data_out_ready;
else
data_out_ready?<=?6'b0;
end
wire?[15:0]?data_in_r_15;
wire?[15:0]?data_in_i_15;
assign?data_in_r_15={data_in_r[7],data_in_r[7],data_in_r[7],data_in_r[7],data_in_r[7],data_in_r[7],data_in_r[7],data_in_r[7],data_in_r};
assign?data_in_i_15={data_in_i[7],data_in_i[7],data_in_i[7],data_in_i[7],data_in_i[7],data_in_i[7],data_in_i[7],data_in_i[7],data_in_i};
butterfly?butterfly(.clk(clk),
??.rst(rst),
??.data_in_r(data_in_r_15),
??.data_in_i(data_in_i_15),
??.count(count),
??.count_out(count_out),
??.working_flag_0(working_flag_0),
??.working_flag_1(working_flag_1),
??.working_flag_2(working_flag_2),
??.working_flag_3(working_flag_3),
??.working_flag_4(working_flag_4),
??.working_flag_5(working_flag_5),
??.working_flag_6(working_flag_6),
??.working_flag_7(working_flag_7),
??.data_out_r(data_out_r),
??.data_out_i(data_out_i)
);
endmodule

設(shè)計(jì)文檔：

1.工程文件

2. 程序文件

3.Testbench

4.modelsim仿真圖