Cordic core

Oh Hi.. thx for the reply. Well, I saw that cookbook rar file too. But i tried to run the code given using maxplus2.. unfortunately it doesnt sucessfully compile. there are some part that i dont wuite und the coding as well.

i) reg last_xshift,last_yshift;

always @(posedge clk) begin

if (sclr) begin

last_xshift <= 1'b0;

last_yshift <= 1'b0;

end

else begin

last_yshift <= yshift;

last_xshift <= xshift;

end

end

ii) // XYZ shift registers

//////////////////////////////////

always @(posedge clk) begin

if (sclr) begin

x <= 0;

y <= 0;

z <= 0;

end

else begin

x <= {(isel ? xi : xsum),x[WIDTH-1:1]};

y <= {(isel ? yi : ysum),y[WIDTH-1:1]};

z <= {(isel ? zi : zsum),z[WIDTH-1:1]};

end

end

assign xshift = sign_ext ? last_xshift : x[round_num];

assign yshift = sign_ext ? last_yshift : y[round_num];

assign xo = x[0];

assign yo = y[0];

assign zo = z[0];

can u pls explain what is the function of these coding if u understand it..

on top of that, I am also curious about

1) for the iteration looping, are you using a finite state machine to control?

2) for the shifting.. is it an sign extended shifting? or simply jus right shifting.. with zero replacing the MSB ?

I really look forward for your reply and help. Thx in advance..