You are an expert Verilog hardware designer working on a complete FPGA or ASIC project. You are given the full source code of a Verilog project. One of the modules in the project is incomplete — its implementation is missing and marked with:

// >>> Module Implementation Begin

// <<< Module Implementation End

Your task is to complete the missing implementation so that the entire project functions correctly. You must infer what the missing module or logic is supposed to do by analyzing the rest of the codebase: module names, signal connections, instantiations, comments, and usage patterns.

Follow these rules:

1. Only generate Verilog code to go between the `// >>> Module Implementation Begin` and `// <<< Module Implementation End` comments.
2. Use Verilog-2001 syntax. Ensure the code is synthesizable.
3. Assume the goal is a working, integrated hardware design — your code must make the whole system function as intended.
4. Analyze the naming, I/O ports, and how the module is instantiated or used in other parts of the project.
5. Implement correct behavior based on design context. Do not guess randomly — reason it out.
6. Avoid vendor-specific features unless explicitly required.
7. Do not output comments, explanation, or anything outside the required code region unless explicitly asked.

Your output should contain **only the Verilog code** that fits inside the marked region.

`default_nettype none

module tt_um_TT06_pwm (
    input  wire clk,
    input  wire rst_n,
    input  wire [7:0] ui_in,
    output wire [7:0] uo_out,
    input  wire [7:0] uio_in,
    output wire [7:0] uio_out,
    output wire [7:0] uio_oe,
    input  wire ena
);

    // Active-low reset → convert to active-high
    wire reset = ~rst_n;

    // Duty cycle from ui_in[6:0]
    wire [6:0] dc = ui_in[6:0];
    wire pwm_out;
    wire pwm_out1;

    // Internal PWM module
    pwm pwm_inst (
        .clk(clk),
        .reset(reset),
        .dc(dc),
        .pwm_out(pwm_out),
        .pwm_out1(pwm_out1)
    );

    // Map outputs
    assign uo_out[0] = pwm_out;
    assign uo_out[1] = pwm_out1;
    assign uo_out[7:2] = 0;

    // Not using bidirectional IOs
    assign uio_out = 8'b0;
    assign uio_oe  = 8'b0;
    wire _unused = &{ui_in[7], uio_in[7:0], ena};

endmodule


`default_nettype none

module pwm (
    input clk,
    input reset,
    input wire [6:0] dc,
    output reg pwm_out,
    output reg pwm_out1
);
// >>> Module Implementation Begin

// <<< Module Implementation End
endmodule




Reference solution:
rtl/generated.v:     reg [7:0] count;
    wire [7:0] threshold;

    assign threshold = (dc * 255) / 100;

    always @(posedge clk or negedge reset) begin
        if (!reset) begin
            count <= 8'd0;
            pwm_out <= 0;
            pwm_out1 <= 0;
        end else begin
            count <= count + 1;

            if (threshold == 0) begin
                pwm_out <= 0;
            end else if (dc >= 7'd100) begin
                pwm_out <= 1;
            end else if (count <= threshold) begin
                pwm_out <= 1;
            end else begin
                pwm_out <= 0;
            end

            pwm_out1 <= pwm_out;
        end
    end