蓝桥杯FPGA赛道第二次模拟题代码

一、顶层文件

module test(
input  wire sys_clk,
input  wire sys_rst,
input  wire [3:0]key_in,
output reg  [7:0]led,

output wire scl,
inout  wire sda,//i2c的信号

output wire [7:0]sel,
output wire [7:0]seg//数码管的驱动
);

wire [23:0] data ;
reg  [31:0] dsp_data;
reg  [23:0]	bcd;

wire S1_debounce,S1_debounce_reg;
wire S2_debounce,S2_debounce_reg;
wire S3_debounce,S3_debounce_reg;

localparam KEY1_STATE1=2'b00;//停止状态
localparam KEY1_STATE2=2'b01;//启动状态

localparam KEY2_STATE1=2'b00;
localparam KEY2_STATE2=2'b01;

reg [1:0] key1_state;//当前状态
reg [1:0] key2_state;//当前状态

//显示eeprom读取的数据
always @(posedge sys_clk or negedge sys_rst)begin
	if(!sys_rst)begin
		dsp_data <={4'd11,4'd10,4'd10,4'd10,4'd10,4'd10,4'd10,4'd10};//初始值，表示没有效数字时钟的显示
		led <=8'b11111111;
	end else begin
		if(S1_debounce_reg&&!S1_debounce)begin
	led[0]<=~led[0];
	end 
	
		bcd[7:4]<=data[7:0]/10;
		bcd[3:0]<=data[7:0]%10;
		
		bcd[11:8]<=data[15:8]%10;
		bcd[15:12]<=data[15:8]/10;
		
		bcd[19:16]<=data[23:16]%10;
		bcd[23:20]<=data[23:16]/10;
	  dsp_data<={4'd11,bcd[23:16],4'd10,bcd[15:8],4'd10,bcd[7:4]};
  end 
end 
//按键一的状态
always @(posedge sys_clk or negedge sys_rst)begin
	if(!sys_rst)begin 
	key1_state<=KEY1_STATE1;
	end else begin
	   if(S1_debounce_reg&&!S1_debounce) begin
			key1_state <= (key1_state ==KEY1_STATE1) ? KEY1_STATE2:KEY1_STATE1;
		end
	end 
end 
//检测按键二的状态
always @(posedge sys_clk or negedge sys_rst)begin
	if(!sys_rst)begin 
		key2_state<=KEY2_STATE1;
	end else begin
	   if(S2_debounce_reg&&!S2_debounce) begin
			key2_state <= (key2_state ==KEY2_STATE1) ? KEY2_STATE2:KEY2_STATE1;
		end
	end 
end

wire [23:0] rd_data;
wire  rd_data_vld;
//reg define
reg [23:0] wr_data;
reg  wr_req;
reg  rd_req=0;

//检测写入EEPROM的条件
always @(posedge sys_clk or negedge sys_rst)begin
 if(!sys_rst)begin
	wr_req<=1'b0;
 end 
    else if({key1_state==KEY1_STATE2&&(S1_debounce_reg&&!S1_debounce)}||{key1_state==KEY1_STATE1&&(S2_debounce_reg && !S2_debounce)})begin
		wr_data <=data;
	   wr_req <=1'b1;
 end 
 else 
     wr_req<=1'b0;
 end 
 
reg [3:0] state=0;
reg [15:0] debounce_couter=0;//去抖计数器
reg [15:0] debounce_couter2=0;//去抖计数器

//上电读取eeprom的数据
   always @(posedge sys_clk or negedge sys_rst)begin
	if(!sys_rst) begin
	state <=0;
	rd_req<=0;
	debounce_couter <=16'b0;
	end else begin 
		case(state)
		0:begin
		//状态0:等待读取开始
			state<=1;
		end 
	   1:begin
		//状态1;从EEprom读取数据
		 rd_req<=1;
		 if(debounce_couter<=16'hFFFF)
			debounce_couter <=debounce_couter+1;
		 else
			state <=2;
		   end
		2:begin
		//状态2：数据加载完毕
		//进一步处理逻辑
		rd_req<=0;
		debounce_couter<=16'b0;
		end 
		default:state <=0;
	 endcase
	end
end	
//eeprom module
eeprom inst_eeprom(
 .clk(sys_clk),
 .rst(sys_rst),
 .wr_req(wr_req),
 .rd_req((~key_in[2])||rd_req),//read data from EEProm
 .device_id(),
 .reg_addr(8'h03),
 .reg_addr_vld(1'b1),
 .wr_data(wr_data),
 .wr_data_vld(wr_req),
 .rd_data(rd_data),
 .rd_data_vld(rd_data_vld),
 .ready(),
 .scl(scl),
 .sda(sda)
);
//按键模块
key debounce_L1(
.sys_clk(sys_clk),
.rst(sys_rst),
.key_in(key_in[0]),
.S_debounce(S1_debounce),
.S_debounce_reg(S1_debounce_reg)
);

key debounce_L2(
.sys_clk(sys_clk),
.rst(sys_rst),
.key_in(key_in[1]),
.S_debounce(S2_debounce),
.S_debounce_reg(S2_debounce_reg)
);

key debounce_L3(
.sys_clk(sys_clk),
.rst(sys_rst),
.key_in(key_in[2]),
.S_debounce(S3_debounce),
.S_debounce_reg(S3_debounce_reg)
);
//时间计数模块
counter_time u_couter_time(
.clk(sys_clk),
.rst_n(sys_rst),
.key_in1(S1_debounce_reg &&!S1_debounce),
.key_in2(S2_debounce_reg &&!S2_debounce),
.key_in3(S3_debounce_reg &&!S3_debounce),
.rd_req(rd_req),
.rd_data(rd_data),
.din_out(data)
);
//数码管显示模块
segdisplay segdisplay_inst(
	.clk(sys_clk),
	.rst(sys_rst),
	.dsp_data(dsp_data),
	.seg(seg),
	.sel(sel)
);
endmodule 

二、数码管驱动

module segdisplay
(
	input	   wire 		      clk						,
	input 	wire 			   rst						,
	input 	wire	[31:0] 	dsp_data				,
	output 	reg 	[7:0] 	seg					,//段选端
	output 	reg 	[7:0] 	sel					//位选段
);
	
localparam [7:0] DIGIT0 =8'b1100_0000 ;//16精制C0
localparam [7:0] DIGIT1 =8'b1111_1001 ;//F9
localparam [7:0] DIGIT2 =8'b1010_0100;//A4
localparam [7:0] DIGIT3 =8'b1011_0000;//B0
localparam [7:0] DIGIT4 =8'b1001_1001;//99
localparam [7:0] DIGIT5 =8'b1001_0010;//92
localparam [7:0] DIGIT6 =8'b1000_0010;//82
localparam [7:0] DIGIT7 =8'b1111_1000;//F8
localparam [7:0] DIGIT8 =8'b1000_0000;//80
localparam [7:0] DIGIT9 =8'b1001_0000 ;//90
localparam [7:0] DIGITX =8'b1011_1111 ;//
localparam [7:0] DIGOFF =8'b1111_1111 ;//FF
localparam [7:0] DIGITC =8'hC6 ;
localparam 		DSP_COUNT = 20'