lms algorithm LMS algorithm using output from XADC

[Shruthi]

Hello all,

I'm trying to simulate LMS algorithm with digital samples from XADC out of Auxillary channel 6.

In my step to update weight, I don't understand how to bring about weight update. It reads Weight_in and Weight_out as XXXX.

 

Please check the bolded. area in LMS_weight module.

 

***********************

module LMShruthi ( DCLK, RESET, Desired_in, mux ); 

input DCLK, RESET;

input   signed [15:0] Desired_in; 

output signed [15:0] mux; 

 

wire [15:0] mu; //mu=0.0000001

reg signed [15:0] Data_in; 

wire signed [15:0] e;

wire signed [31:0] Product_32, y; 

 

assign mu  = 16'b0000000001100110;   

 

always # (50000) Data_in = Desired_in;

 

assign Product_32 = mu * Data_in; 

 

    assign mux = Product_32[24:9];

 

LMS_weight uut3   ( .DCLK(DCLK), .RESET(RESET), .Data_in(Data_in), .mux(mux), .y(y) ); 

 

    assign e = Desired_in - y[24:9];  

    

endmodule 

 

***********************************************************

module LMS_weight (DCLK, RESET, Data_in, mux, y); 

    

    input DCLK,RESET;

    input signed [15:0] Data_in,mux; 

    output  signed [31:0] y; 

 

 

    wire signed [15:0] Weight_in;

    wire signed [15:0] Weight_out, emux; 

    wire signed [31:0] Product_32; 

 

    assign Product_32 = Data_in * mux; 

    assign emux = Product_32[26:11]; 

 

    assign Weight_in = (RESET==1'b1) ? 16'h0000 : (emux + Weight_out);

             

    assign y = Weight_out * Data_in; 

    

endmodule 

***********************************************************

Thank you,

Shruthi Sampathkumar.

[hamster]

Well, for a start, nothing in there looks to be clocked at all.

Without using a clock somewhere, you can't update any internal state.