module top(CLK,BUT1,BUT2,LED1,LED2);

parameter OFF=8h'02
parameter ON=8h'04;
parameter SLEEP=8h'07, SLEEPD=8h'a5;
//To exit deep sleep mode, send HWRESET to the DRIVER

parameter WRITE=8h'10;
parameter REFRESH=8h'12, REFRESHD=8h'01;
//During REFRESH BUSY=0, after REFRESH, BUSY=1 again.

input red, black, clk_eink;
output DC, CS, DIN, RST, BUSY, eink_clk;

input CLK;				//input 100Mhz clock
input BUT1;				//input signal from button 1
input BUT2;				//input signal from button 2
output LED1;				//output signal to LED1
output LED2;				//output signal to LED2

reg BUT1_r;			//register to keep button 1 state
reg BUT2_r;			//register to keep button 2 state
reg LED1_m0_r;			//LED1 value in mode = 0
reg LED2_m0_r;			//LED2 value in mode = 0
reg LED1_m1_r;			//LED1 value in mode = 1
reg LED2_m1_r;			//LED2 value in mode = 1
reg [14:0] cntr;		// 15 bit counter for LED blink timing
reg [14:0] rst_cnt=0;		// 15 bit counter for button debounce
reg mode=1;			//mode set to 1 initially
reg dc_r, cs_r, din_r, rst_r, busy_r;
reg width=800;
reg height=480;

wire clk_24KHz;			//signal with approx 24KHz clock
wire reset;			//used for button debounce

assign DIN = din_r;
assign CS = cs_r;
assign DC = dc_r;
assign RST = rst_r;
assign BUSY = busy_r;

assign reset = rst_cnt[14];				//reset signal is connected to bit15 of rst_cnt
assign LED1 = mode ? LED1_m1_r : LED1_m0_r;		//multiplexer controlled by mode which connects LED1_m1_r or LED1_m0_r to LED1
assign LED2 = mode ? LED2_m1_r : LED2_m0_r;		//multiplexer controlled by mode which connects LED2_m1_r or LED2_m0_r to LED2


always @ (posedge clk_24KHz) begin			//on each positive edge of 24414Hz clock
	BUT1_r <= BUT1;					//capture button 1 state to BUT1_r
	BUT2_r <= BUT2;					//capture button 2 state to BUT2_r
	cntr <= cntr + 15'd1;				//increment cntr LED blink counter

	if(reset == 1'b0) begin				//if bit15 of rst_cnt is not set yet
		rst_cnt <= rst_cnt + 15'd1;		//increment the counter rst_cnt
	end

	if(BUT1_r == 1'b0 && BUT2_r == 1'b0 && reset == 1'b1) begin	//if bit15 of rst_cnt is set and both buttons are pressed
		mode <= mode ^ 1'b1;					//toggle the mode
		rst_cnt <= 15'd0;					//clear debounce rst_cnt
	end

	LED1_m0_r <= ~BUT1_r;				//copy inversed state of button 1 to LED1_m0_r
	LED2_m0_r <= ~BUT2_r;				//copy inversed state of button 2 to LED2_m0_r
	
	if(cntr == 15'd12207) begin			//when 0.5s pass
		LED1_m1_r <=  1'b0;			//reset LED1_m1_r
		LED2_m1_r <=  1'b1;			//set LED2_m1_r
	end
	if(cntr > 15'd24414) begin			//when 1.0s pass
		cntr <= 15'd0;				//clear cntr
		LED1_m1_r <=  1'b1;			//set LED1_m1_r
		LED2_m1_r <=  1'b0;			//reset LED2_m1_r
	end
end

always @ (negedge BUT1 | negedge BUT2) begin

end

endmodule

//Club 2 below for creating hex
// 2 frames : black 0 and white 1 , white 1 and red 0