kbd.v

一个基于FPGA的游戏,其中包含多个项目,有吃豆子,可以连接到LCD的显示输出.该源码用xilinx的ise仿真综合成功,并且用spartan3开发板测试.可以有2个人在键盘上对弈.

`timescale 1ns / 1ps
//////////////////////////////////////////////////////////////////////////////////
// Company: 
// Engineer: 
// 
// Create Date:    09:49:48 03/20/2007 
// Design Name: 
// Module Name:    kbd 
// Project Name: 
// Target Devices: 
// Tool versions: 
// Description: 
//
// Dependencies: 
//
// Revision: 
// Revision 0.01 - File Created
// Additional Comments: 
//
//////////////////////////////////////////////////////////////////////////////////
module kbd(kbdclk,kbddat,mclk,rst,dot,ssg,an,key_out);
input kbdclk;
input kbddat;
input mclk;
input rst;
output dot;
output[6:0]ssg;
output[3:0]an;
output[2:0]key_out;

reg an;
reg [5:0]memcnt;
reg [10:0]memhgn;
reg [10:0]mem;
reg [10:0]buffer;
reg [1:0]impulse=0;
reg [3:0]showd;
reg [3:0]showc;
reg [3:0]showb;
reg [3:0]showa;
reg ext;
reg setf0;
reg key_out;
clkdev clkdev1 (mclk,scanclk);
sggctrl sggctrl1 (an,showa,showb,showc,showd,dot,ssg);
always@(negedge kbdclk or posedge rst)
begin
	if(rst) 
	begin 
		memcnt<=0;
		showd<=0;
		showc<=11;
		showb<=2;
		showa<=1;
	end
	else
	begin	
	mem[memcnt]<=kbddat;
	memcnt<=memcnt+1;		
	if(memcnt==10)
		begin
			memcnt<=0;
			buffer<=mem[8:1];
			if(buffer==8'he0) ext<=1;
			else if(buffer==8'hf0)
			begin
				ext<=0;
				setf0<=1;
			end
			else if(setf0==1)setf0<=0;
			else if(ext==1)
			begin
				showd<=4'he;
				showc<=4'h0;
				showb<=buffer[7:4];
				showa<=buffer[3:0];
				ext<=0;
				if(buffer[7:0]==4'h75) key_out<=1;
				else if(buffer[7:0]==4'h74) key_out<=4;
				else if(buffer[7:0]==4'h72) key_out<=3;
				else if(buffer[7:0]==4'h6b) key_out<=2;
			end
			else
			begin
				showd<=4'h0;
				showc<=4'h0;
				showb<=buffer[7:4];
				showa<=buffer[3:0];
			end
		end
	else key_out<=0;
	end
end

always@(posedge scanclk)
begin
   impulse<=impulse+1;
	case(impulse)
	2'b00 :an<=4'b1110;
	2'b01 :an<=4'b1101;
	2'b10 :an<=4'b1011;
	2'b11 :an<=4'b0111;
	endcase
end

endmodule