LSIC - 7 segment displays

`timescale 1ns/1ps

module SevenSegmentController(
    input [31:0] ms_count,  // Millisecond count input
    output reg [6:0] hex0,  // 7-segment output for digit 0 (LSB)
    output reg [6:0] hex1,  // 7-segment output for digit 1
    output reg [6:0] hex2,  // 7-segment output for digit 2
    output reg [6:0] hex3,  // 7-segment output for digit 3
    output reg [6:0] hex4,  // 7-segment output for digit 4
    output reg [6:0] hex5   // 7-segment output for digit 5 (MSB)
);

    // Local variables for extracted digits
    reg [3:0] digit[5:0];

    // 7-segment encoding (active low):
    // a-g segments for digits 0-9
    function [6:0] encode;
        input [3:0] value;
        case (value)
            4'd0: encode = 7'b1000000; // 0
            4'd1: encode = 7'b1111001; // 1
            4'd2: encode = 7'b0100100; // 2
            4'd3: encode = 7'b0110000; // 3
            4'd4: encode = 7'b0011001; // 4
            4'd5: encode = 7'b0010010; // 5
            4'd6: encode = 7'b0000010; // 6
            4'd7: encode = 7'b1111000; // 7
            4'd8: encode = 7'b0000000; // 8
            4'd9: encode = 7'b0010000; // 9
            default: encode = 7'b1111111; // Blank
        endcase
    endfunction

    // Extract digits from ms_count
    always @(*) begin
        // Convert ms_count into individual digits (BCD extraction)
        digit[0] = ms_count % 10;
        digit[1] = (ms_count / 10) % 10;
        digit[2] = (ms_count / 100) % 10;
        digit[3] = (ms_count / 1000) % 10;
        digit[4] = (ms_count / 10000) % 10;
        digit[5] = (ms_count / 100000) % 10;

        // Map digits to corresponding 7-segment displays
        hex0 = encode(digit[0]);
        hex1 = encode(digit[1]);
        hex2 = encode(digit[2]);
        hex3 = encode(digit[3]);
        hex4 = encode(digit[4]);
        hex5 = encode(digit[5]);
    end

endmodule