[Vivado] FSM (Stop Watch, 가산기)

.

`timescale 1ns/1ps

module LED_FSM(
    input clk,
    input reset,
    input i_ledSwitch,
    output reg o_led
);
parameter S_OFF = 1'b0, S_ON = 1'b1 ;
reg state = S_OFF, nextState;

//state register
    always @ (posedge clk, posedge reset) begin //next state part
        if (reset) state <= S_OFF;
        else state <= nextState;
    end

// next state logic - event, change state
    always @ (i_ledSwitch, state) begin
        case (state)
            S_OFF : begin
                     if(i_ledSwitch == 1'b1) nextState = S_ON;
                    else nextState = S_OFF;
            end

            S_ON : begin
                     if(i_ledSwitch == 1'b0) nextState = S_OFF;
                    else nextState = S_ON;
            end
            default : nextState = S_OFF; 
        endcase

    end

/*// output logic - event, change state / moor
    always @ (state) begin
        case (state)
            S_OFF : begin
                    o_led = 1'b0;
            end

            S_ON : begin
                    o_led = 1'b1;
            end
            default : o_led = 1'b0; 
        endcase
        
    end
*/
// output logic - event, change state / meleay
    always @ (state, i_ledSwitch) begin
        case (state)
            S_OFF : begin
                    if(i_ledSwitch == 1'b1) o_led = 1'b1;
                    else o_led = 1'b0;
            end

            S_ON : begin
                    if(i_ledSwitch == 1'b0) o_led = 1'b0;
                    else o_led = 1'b1;
            end
            default : o_led = 1'b0; 
        endcase
        
    end
endmodule

`timescale 1ns / 1ps

module Calculator(
    input clk,
    input reset,
    input [7:0] i_swa,
    input [7:0] i_swb,
    input i_pbStopRun,
    input i_pbClear,
    output [3:0] o_digitSel,
    output [7:0] o_fndFont
    );

    wire [8:0] w_add;
    wire [13:0] w_stopWatchValue, w_FNDSourceValue;
    wire w_stopRunSW = i_swa[0], w_clearSW = i_swa[1], w_mode = i_swb[7];
    wire w_stopRun, w_clear, w_pbStopRun, w_pbClear;
    
    PushButtonOneShot U_PB_StopRun(
        .clk(clk),
        .reset(reset),
        .i_pb(i_pbStopRun),
        .o_pb(w_pbStopRun)
    );

    PushButtonOneShot U_PB_Clear(
        .clk(clk),
        .reset(reset),
        .i_pb(i_pbClear),
        .o_pb(w_pbClear)
    );

    FSM_Stopwatch U_FSM_stopwatch(
        .clk(clk),
        .reset(reset),
        .i_stopRunSw(w_pbStopRun),
        .i_clearSW(w_pbClear),
        .o_stop_run(w_stopRun),
        .o_clear(w_clear)
    );

    Stopwatch U_stopwatch(
        .clk(clk),
        .reset(reset),
        .i_run_stop(w_stopRun),
        .i_clear(w_clear),
        .o_upCounter(w_stopWatchValue)
    );

    FullAdder_8bit U_FullAdder_8bit(
        .i_a(i_swa),
        .i_b(i_swb),
        .o_Sum(w_add[7:0]),
        .o_Crry(w_add[8])
	);

    Mux_14bit U_Mux_14bit(
        .i_sel(w_mode),
        .i_x0({{5{1'b0}}, w_add}),
        .i_x1(w_stopWatchValue),
        .o_y(w_FNDSourceValue)
    );

    FndController U_FndController(
        .clk(clk),
        .reset(reset),
        .i_sw(w_FNDSourceValue),
        .o_digitSel(o_digitSel),
        .o_fndFont(o_fndFont)
    );

endmodule