键盘去抖动CPLD设计经过验证,可以直接用数码管显示,同时也希望大家给于新想法

				//--------------------------------
				//Generate scan code
				//Filename : CODE.v
				//--------------------------------
				module CODE
					(
						CLK,
						SCAN_CODE
					);
				
				
					input	CLK;
				
					output	[1:0]	SCAN_CODE;
				
					parameter	leng=9;
				
					reg	[leng-1:0]	REG;
				
				always @ (posedge CLK)
				begin
					REG = REG + 9'b01;
				end
				
				assign SCAN_CODE = REG[leng-1:leng-2];
				
				endmodule