lcdfinal.v

用状态机实现密码锁State machine used to achieve code lock

module lcdfinal
	(
		////////////////////	Clock Input	 	////////////////////	 
	
		CLOCK_50,						//	50 MHz
        SW,
	    
		////////////////////	LCD Module 16X2		////////////////
		LCD_ON,							//	LCD Power ON/OFF
		LCD_BLON,						//	LCD Back Light ON/OFF
		LCD_RW,							//	LCD Read/Write Select, 0 = Write, 1 = Read
		LCD_EN,							//	LCD Enable
		LCD_RS,							//	LCD Command/Data Select, 0 = Command, 1 = Data
		LCD_DATA,						//	LCD Data bus 8 bits
		////////////////////	LED Module 		////////////////
        HEX0,HEX1,HEX2,HEX3,HEX4,HEX5,HEX6,HEX7,
		LEDR
	);

////////////////////////	Clock Input	 	////////////////////////

input			CLOCK_50;				//	50 MHz
input           [17:0]SW;
output [17:13]LEDR;
////////////////////	LCD Module 16X2	////////////////////////////
inout	[7:0]	LCD_DATA;				//	LCD Data bus 8 bits
output			LCD_ON;					//	LCD Power ON/OFF
output			LCD_BLON;				//	LCD Back Light ON/OFF
output			LCD_RW;					//	LCD Read/Write Select, 0 = Write, 1 = Read
output			LCD_EN;					//	LCD Enable
output			LCD_RS;					//	LCD Command/Data Select, 0 = Command, 1 = Data
////////////////////	LED Module 		////////////////
output [6:0]HEX0,HEX1,HEX2,HEX3,HEX4,HEX5,HEX6,HEX7;
assign HEX0=7'bzzzzzzz,HEX1=7'bzzzzzzz,HEX2=7'bzzzzzzz,HEX3=7'bzzzzzzz,HEX4=7'bzzzzzzz,HEX5=7'bzzzzzzz,HEX6=7'bzzzzzzz,HEX7=7'bzzzzzzz;
assign LEDR[17:13]=cmd[4:0];
//	LCD ON
assign	LCD_ON		=	1'b1;
assign	LCD_BLON	=	1'b0;

wire		DLY_RST;
reg	[4:0]LCD_XX;

Reset_Delay			r0	(	.iCLK(CLOCK_50),.oRESET(DLY_RST)	);	

///////////////////SW scaning////////////////////////////////  
reg[19:0]  cnt;	//计数寄存