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实验二：闪烁灯

代码

//Name: led_flicker.v
//Function:
// 50MHz PIN_27 SW7 D8---D1
// clk rst led[7:0]
//Author: YanceyLu

module led_flicker(clk,rst,led);
input clk,rst;
output [7:0] led;

reg [7:0] led;
reg [25:0] delay_cnt;

always @(posedge clk or negedge rst)
begin
if(!rst)
delay_cnt<=0;
else
begin
if(delay_cnt==49999999)
delay_cnt<=0;
else
delay_cnt<=delay_cnt+1;
end
end

always @(posedge clk or negedge rst)
begin
if(!rst)
led<=8'b11111111;
else
begin
if(delay_cnt==49999999)
led<=~led;
else
led<=led;
end
end
endmodule



效果视频

实验三 流水灯

代码

//Name: led_water.v
//Function:
// 50MHz PIN_27 SW8 D8---D1
// clk rst led[7:0]
//Author: YanceyLu

module led_water(clk,rst,led);
input clk,rst;
output [7:0] led;

reg [7:0] led;
reg [25:0] delay_cnt;

always @(posedge clk or negedge rst)
begin
if(!rst)
delay_cnt<=0;
else
begin
if(delay_cnt==24999999)
delay_cnt<=0;
else
delay_cnt<=delay_cnt+1;
end
end

always @(posedge clk or negedge rst)
begin
if(!rst)
led<=8'b11111111;
else
begin
if(delay_cnt==24999999)
begin
led<=led>>1;
if(led==0)
led<=8'b11111111;
end
else
led<=led;
end
end
endmodule


效果视频

实验四 跑马灯

代码

//Name: led_run.v
//Function:
// 50MHz PIN_27 SW8 D8---D1
// clk rst led[7:0]
//Author: YanceyLu

module led_run(clk,rst,led);
input clk,rst;
output [7:0] led;

reg [7:0] led;
reg [25:0] delay_cnt;

always @(posedge clk or negedge rst)
begin
if(!rst)
delay_cnt<=0;
else
begin
if(delay_cnt==24999999)
delay_cnt<=0;
else
delay_cnt<=delay_cnt+1;
end
end

always @(posedge clk or negedge rst)
begin
if(!rst)
led<=8'b01111111;
else
begin
if(delay_cnt==24999999)
begin
led<={led[0],led[7:1]};
end
else
led<=led;
end
end
endmodule


效果视频

实验四 花样彩灯


代码

//Name: led_more.v
//Function:
// 50MHz PIN_27 SW8 D8---D1
// clk rst led[7:0]
//Author: YanceyLu

module led_more(clk,rst,led);
input clk,rst;
output [7:0] led;

reg [7:0] led;
reg [25:0] delay_cnt;
reg [7:0] state;
reg clk1;

wire newclk;
assign newclk=clk1;

always @(posedge clk or negedge rst)
begin
if(!rst)
begin
delay_cnt<=0;
clk1<=0;
end
else
begin
if(delay_cnt==12499999)
begin
delay_cnt<=0;
clk1<=~clk1;
end
else
delay_cnt<=delay_cnt+1;
end
end

always @(posedge newclk or negedge rst)
begin
if(!rst)
begin
led<=0;
state<=0;
end
else
begin
state<=state+1;
case(state)
//led flicker
0: led<=0;
1: led<=8'b11111111;
2: led<=0;
3: led<=8'b11111111;
//led water
4: led<=8'b01111110;
5: led<=8'b00111100;
6: led<=8'b00011000;
7: led<=0;
8: led<=8'b11111111;
9: led<=8'b01111110;
10: led<=8'b00111100;
11: led<=8'b00011000;
12: led<=0;
//led run
13: led<=8'b11111111;
14: led<=8'b01111110;
15: led<=8'b10111101;
16: led<=8'b11011011;
17: led<=8'b11100111;
18: led<=8'b11111111;
19: led<=8'b01111110;
20: led<=8'b10111101;
21: led<=8'b11011011;
22: led<=8'b11100111;
23: led<=8'b11111111;
default:
state<=0;
endcase
end
end
endmodule

效果视频