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/*

        SQmusic

        logarithmic PWM controller to use with SQMUSIC

  Version 0.1, tested on simulation only with Capcom's 1942

  (c) Jose Tejada Gomez, 11th May 2013

  You can use this file following the GNU GENERAL PUBLIC LICENSE version 3

  Read the details of the license in:

  http://www.gnu.org/licenses/gpl.txt

  Send comments to: jose.tejada@ieee.org

*/

// Compile with: 

// iverilog sqm_pwm_1_tb.v sqm_pwm.v -s sqm_pwm_1_tb -o sqm_pwm_1_tb

`timescale 1ns/1ps

module sqm_pwm_1_tb;

reg clk;

always begin

  clk=0;

  #10 clk <= ~clk;

end

reg [3:0]A;

always begin

  A=0;

  #5000 A <= A+1;

end

reg reset_n;

initial begin

  $dumpvars();

  $dumpon;

  reset_n=0;

  #15 reset_n=1;

  #80000 $finish;

end

SQM_PWM_1 apwm( .clk(clk), .reset_n(reset_n), .din(A), .pwm(y_a) );

endmodule