cordic算法verilog实现（复杂版）

cordic算法verilog实现（复杂版）

modulecordic(clk,

rs

t_n,ena,phase_in,sin_out,cos_out,eps);

pa

ram

eterDATA_WIDTH=8;

parameter

PI

PELINE=8;

input

clk;

input

rst_n;

input

ena;

input

[DATA_WIDTH-1:0]

phase_in;

output[DATA_WIDTH-1:0]

sin_out;

output[DATA_WIDTH-1:0]

cos_out;

output[DATA_WIDTH-1:0]

eps;

reg

[DATA_WIDTH-1:0]

sin_out;

reg

[DATA_WIDTH-1:0]

cos_out;

reg

[DATA_WIDTH-1:0]

eps;

reg

[DATA_WIDTH-1:0]

phase_in_reg;

reg

[DATA_WIDTH-1:0]

x0,y0,z0;

reg

[DATA_WIDTH-1:0]

x1,y1,z1;

reg

[DATA_WIDTH-1:0]

x2,y2,z2;

reg

[DATA_WIDTH-1:0]

x3,y3,z3;

reg

[DATA_WIDTH-1:0]

x4,y4,z4;

reg

[DATA_WIDTH-1:0]

x5,y5,z5;

reg

[DATA_WIDTH-1:0]

x6,y6,z6;

reg

[DATA_WIDTH-1:0]

x7,y7,z7;

reg

[1:0]

quadrant[PIPELINE:0];

integeri;

//getrealquadrantandmaptofirst_nquadrant

always@(posedgeclk

or

negedgerst_n)

begin

if(!rst_n)

phase_in_reg<=8'b0000_0000;

else

if(ena)

begin

case(phase_in[7:6])

2'b00:phase_in_reg<=phase_in;

2'b01:phase_in_reg<=phase_in-8'h40;

//-pi/2

2'b10:phase_in_reg<=phase_in-8'h80;

//-pi

2'b11:phase_in_reg<=phase_in-8'hc0;

//-3pi/2

default:;

en

dc

ase

end

end

always@(posedgeclkornegedgerst_n)

begin

if(!rst_n)

begin

x0<=8'b0000_0000;

y0<=8'b0000_0000;

z0<=8'b0000_0000;

end

else

if(ena)

begin

x0<=8'h4D;

//defineaggregateconstantXi=1/P=1/1.6467=0.60725(Xi=2^7*P+8'h4D)

y0<=8'h00;

z0<=phase_in_reg;

end

end

//level1

always@(posedgeclkornegedgerst_n)

begin

if(!rst_n)

begin

x1<=8'b0000_0000;

y1<=8'b0000_0000;

z1<=8'b0000_0000;

end

else

if(ena)

if(z0[7]==1'b0)