20150115_KUAS_Verilog_FullAdder_4bit(Altera)

/***************************************/
/** 20141211 4-Bit Adder              **/
/** Maker  : Yan                      **/
/** E-Mail : [email protected] **/
/** Date   : 2014/12/11 pm.04:16      **/
/***************************************/

module Adder_4Bit(in1, in2, out1, out2, _set, _reset);
    input       [3:0]   in1, in2;
    input       _set, _reset;
    output      [6:0]   out1, out2;

    reg     [7:0]   temp_out;
    always@(negedge _set or negedge _reset) begin
        if(_reset == 0) begin
            temp_out = 8'b00000000;
        end
        else
            if(_set == 0) begin
                temp_out = in1 + in2;
            end
    end

    Seven_Change    tmp1 (temp_out[3:0], out1);
    Seven_Change    tmp2 (temp_out[7:4], out2);
endmodule

module Seven_Change(in, out);
    input       [3:0]   in;
    output reg  [6:0]   out;
    always@(in) begin
        case(in)
            // 0
            4'b0000: out = 7'b1000000;
            // 1
            4'b0001: out = 7'b1111001;
            // 2
            4'b0010: out = 7'b0100100;
            // 3
            4'b0011: out = 7'b0110000;
            // 4
            4'b0100: out = 7'b0011001;
            // 5
            4'b0101: out = 7'b0010010;
            // 6
            4'b0110: out = 7'b0000010;
            // 7
            4'b0111: out = 7'b1111000;
            // 8
            4'b1000: out = 7'b0000000;
            // 9
            4'b1001: out = 7'b0011000;
            // A
            4'b1010: out = 7'b0001000;
            // b
            4'b1011: out = 7'b0000011;
            // C
            4'b1100: out = 7'b1000110;
            // d
            4'b1101: out = 7'b0100001;
            // E
            4'b1110: out = 7'b0000110;
            // F
            4'b1111: out = 7'b0001110;
        endcase
    end
endmodule