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//parameter Green=2'b10, Red=2'b01;

s_test U2 (arduino_purchase,clk,reset,sen1_in,sen1_out,warning_sig,speaker1,speaker2,speaker3);

assign green=(warning_sig)?1'b0:1'b1;
assign red=(warning_sig)?1'b1:1'b0;
assign lamp=(warning_sig)?1'b1:1'b0;

endmodule
---------------------------------------------------------------------
//< 스위치 모듈>

// d_sw output timing -> 50[Mhz] 기준 BOUNCING DELAY 뒤에 출력
// BOUNCING_DELAY 값 조절가능

module sw_debouncing (clk, rst, b_sw, d_sw);

input clk, rst, b_sw;

output reg d_sw;

reg [25:0] cnt;
reg key_state;

parameter BOUNCING_DELAY = 12500000; // boungcing count num
parameter ACTIVE_HIGH = 1'b1; // active_high switch
parameter ACTIVE_LOW = 1'b0; // active_low switch
parameter KEY_ON = 0;
parameter KEY_OFF = 1;

always @(posedge clk, negedge rst) begin
if(!rst) begin
cnt <= 0;
key_state <= KEY_ON;
d_sw <= 0;
end
else begin
if(key_state == KEY_ON) begin //KEY_ON
cnt <= 0;
if(b_sw == ACTIVE_HIGH) begin
d_sw <= 1;
key_state <= KEY_OFF;
end
else begin
d_sw <= 0;

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