ittrative method and hex0-7 display

Altera_Forum · ‎04-15-2008

I have a itterative fn to aproximate a square root the 8 bit value

root_x = 0 initially and 0111_0000 when the input x is 49 ie

0111_0000 = 7.0 (so for 51 ~ 7.12). When I run the below wrapper

module I always get 0 for

root_x[7:4] and root_x[3:0] since they dont get the correct answer

until as few itterations 150ns latter any Idea how I would sample

these 2 values at 150ns ?

module extra(clk, x,increment,root_x, MSD, LSD, f0,

f1,compute,num,num1);

input [7:0] x;

input clk, compute;

output [10:0] increment;

output [7:0] root_x,num,num1;

reg [7:0] num,num1;

output [6:0] MSD, LSD, f0, f1;

wire [7:0] root_x;

sqrt sq (clk, x, root_x, increment,p1,p2);

always @ *

begin

//p2 = root_x[7:4];

//p1 = root_x[3:0];

if (compute)

begin

num = {4'b000, root_x[7:4]};

case (root_x[3:0])

4'b0000: num1=8'd0;

4'b0001: num1=8'd6;

4'b0010: num1=8'd12;

4'b0011: num1=8'd18;

4'b0100: num1=8'd25;

4'b0101: num1=8'd32;

4'b0110: num1=8'd37;

4'b0111: num1=8'd43;

4'b1000: num1=8'd50;

4'b1001: num1=8'd56;

4'b1010: num1=8'd62;

4'b1011: num1=8'd68;

4'b1100: num1=8'd75;

4'b1101: num1=8'd81;

4'b1110: num1=8'd87;

4'b1111: num1=8'd93;

endcase

end

else

num = x;

end

ss_display SSD (num, MSD, LSD);

ss_display SSD1 (num1, f0, f1);

endmodule

`include "sqrt.v"

`include "ss_display.v"