increase_speed.v.bak

module increase_speed
(
  // Clock Input (50 MHz)
  input  CLOCK_50,
  //  Push Buttons
  input  [3:0]  KEY,
  //  DPDT Switches 
  input  [17:0]  SW,
  //  7-SEG Displays
  output  [6:0]  HEX0, HEX1, HEX2, HEX3, HEX4, HEX5, HEX6, HEX7,
  //  LEDs
  output  [8:0]  LEDG,  //  LED Green[8:0]
  output  [17:0]  LEDR //  LED Red[17:0]
);

// Connect dip switches to red LEDs
assign LEDR[17:0] = SW[17:0];

// turn off green LEDs
assign LEDG[8:0] = 0;

reg [3:0] A;
reg [3:0] OVERFLOW;

// map to 7-segment displays
hex_7seg dsp0(OVERFLOW,HEX7);
hex_7seg dsp1(A[3:0],HEX6);

wire [6:0] blank = ~7'h00; 

// blank remaining digits
assign HEX0 = blank;
assign HEX1 = blank;
assign HEX2 = blank;
assign HEX3 = blank;
assign HEX4 = blank;
assign HEX5 = blank;

// control (set) value of A, signal with KEY3
always @( negedge KEY[3]  )
	if( KEY[3] ) begin
		if (A<9) begin
			 A <= A + 1'b1;
			 OVERFLOW <= OVERFLOW + 1'b0;
		end
		else begin
			 A <= 4'b0000;
			 OVERFLOW <= OVERFLOW + 1'b1;
	end
end/*
else if( ~KEY[2]) begin
	if (A>0) begin
		 A <= A - 1'b1;
		 OVERFLOW <= OVERFLOW - 1'b0;
	end
	else begin
		 A <= 4'b1001;
		 OVERFLOW <= OVERFLOW - 1'b1;
	end
end*/


endmodule