这样的cic对不对? 根据论坛给的程序改的!
//*********************************************************
//cic滤波器 5阶8倍抽取,延迟1, R=8,M=1,N=5
//32+5*log8=47, 所以扩展位sxtx 47位,输出为24位。
//*********************************************************
module cic(clk, x_in, clk2, y_out); //----> Interface
input clk;
input [31:0] x_in;
output [23:0] y_out;
output clk2;
reg clk2;
parameter hold=0, sample=1;
reg [1:0] state;
reg [4:0] count;
reg [31:0] x; // 输入寄存
wire [46:0] sxtx; // 符号扩展输入
reg [46:0] i0,i1,i2,i3,i4;
reg [46:0] i4d1, c1, c0;
reg [46:0] c1d1, c2;
reg [46:0] c2d1, c3;
reg [46:0] c3d1, c4;
reg [46:0] c4d1, c5;
// 抽取器
always @(posedge clk)
begin : FSM
if (count == 7) begin
count <= 0;
state <= sample;
clk2 <= 1;
end
else begin
count <= count + 1;
state <= hold;
clk2 <= 0;
end
end
assign sxtx = {{15{x[31]}},x};
//积分器
always @(posedge clk)
begin : Int
x <= x_in;
i0 <= i0 + sxtx;
i1 <= i1 + i0 ;
i2 <= i2 + i1 ;
i3 <= i3 + i2 ;
i4 <= i4 + i3 ; //五级积分
end
//梳状器
always @(posedge clk)
begin : Comb
if (state == sample) begin
c0 <= i4;
i4d1 <= c0;
c1 <= c0 - i4d1;
c1d1 <= c1;
c2 <= c1 - c1d1;
c2d1 <= c2;
c3 <= c2 - c2d1;
c3d1 <= c3;
c4 <= c3 - c3d1;
c4d1 <= c4;
c5 <= c4 - c4d1; //五级梳状
end
end
assign y_out = c5[46:23];
endmodule
这样的对不对呢?5级8倍抽取...对不对呢?
还有,matlab生成的数据quartus如何读取?
另外仿真生成波形数据如何让matlab读取呢?
求助了