一、功能介绍
本次数字逻辑与EDA技术实验课程设计用FPGA实现了一个总时长为一小时的闹钟，它所具有的功能如下：
基本功能：
(1)正常时间显示，按照正常的时钟进行计时；
(2)闹钟时间显示，显示出来设置的闹钟时间；
(3)闹钟触发，时钟走到闹钟时间后触发闹钟。
设计功能：
(1)手动调整时间，如果某时刻的时钟时间与正常时间有偏差，可以进行手动调整，使之与正常时间一致；
(2)八路彩灯，时钟走到闹钟时间后，会进行8秒的彩灯闪烁，彩灯依次从全亮到逐渐向中间熄灭，再到向两边闪烁直到全亮，提醒使用者设置的闹钟到点了。
二、设计思路
(1)对本次设计所需要的彩灯以及显示器还有开关进行一个汇总，并提前查阅其各自的管脚，进行分配；
(2)用实验三分频的方法设计出来一个1s的时钟，用于后面的时钟时间显示以及状态转移的持续时间；
(3)分别设计出来时钟自动计时以及手动调节时间的分秒进位，以及目前时钟显示的时间与设置闹钟的时间是否一致；
(4)设计分秒的显示；
(5)用实验四有限状态机的设计方法进行8路彩灯的显示。
三、模块结构
(1)模块一：设计得到1s的时钟信号；
(2)模块二：手动设置与自动计时的控制；
(3)模块三：设置闹钟与闹钟触发；
(4)模块四：手动调整时间；
(5)模块五：分秒显示；
(6)模块六：闹钟触发的8路彩灯显示。
四、代码
module ljw_clock(clk50,clear,set_mod,set_clock,set_option,add_time,led,out1,out2);
(*chip_pin="Y2"*)input clk50;
(*chip_pin="AB28"*)input clear;
(*chip_pin="AC27"*)input set_mod;
(*chip_pin="AC28"*)input set_clock;
(*chip_pin="M23"*)input set_option;
(*chip_pin="M21"*)input add_time;
(*chip_pin="G19,F19,E19,F21,F18,E18,J19,H19"*)output reg[7:0] led;
(*chip_pin="V21,U21,AB20,AA21,AD24,AF23,Y19,AA25,AA26,Y25,W26,Y26,W27,W28"*)output reg[13:0] out1;
(*chip_pin="M24,Y22,W21,W22,W25,U23,U24,G18,F22,E17,L26,L25,J22,H22"*)output reg[13:0] out2;
reg[5:0] sec;
reg[5:0] min;
//the first module
reg clk1;
reg[24:0] cout;
always@(posedge clk50)
begin
if(cout==25'd24999999)
begin
cout = 0;
clk1 = ~clk1;
end
else
cout = cout + 1;
end
//the second module
reg[5:0] sec_1;
reg[5:0] min_1;
reg[5:0] sec_2;
reg[5:0] min_2;
reg flag;
reg[3:0] CS;
reg[3:0] NS;
always@(posedge clk1)
begin
// 2-1
if(flag==1 && sec-10<clock_sec)
begin
CS = NS;
NS = sec - clock_sec;
case(NS)
4'd0:NS = s1;
4'd1:NS = s2;
4'd2:NS = s3;
4'd3:NS = s4;
4'd4:NS = s5;
4'd5:NS = s6;
4'd6:NS = s7;
4'd7:NS = s8;
4'd8:NS = s9;
4'd9:NS = s0;
default:NS = s0;
endcase
end
// 2-2
if(flag==1 && sec-10>=clock_sec)
begin
flag = 0;
end
// 2-3
if(set_mod==1)
begin
if(sec_1==59)
begin
sec_1 = 0;
begin
if(min_1==9) min_1 = 0;
else min_1 = min_1 + 1;
end
end
else sec_1 = sec_1 + 1;
end
// 2-4
else if(set_mod==0 && set_clock==0)
begin
sec_1 = sec_2;
min_1 = min_2;
end
// 2-5
if(min==clock_min && sec==clock_sec)
begin
flag = 1;
end
end
//the third module
reg[5:0] clock_sec;
reg[5:0] clock_min;
always@(posedge add_time)
begin
// 3-1
if(set_mod==0 && set_clock==0)
begin
// 3-1-1
if(set_option==1)
begin
if(clear==0)
begin
if(sec_2==59) sec_2 = 0;
else sec_2 = sec_2 + 1;
end
else sec_2 = 0;
end
// 3-1-2
else
begin
if(clear==0)
begin
if(min_2==59) min_2 = 0;
else min_2 = min_2 + 1;
end
else min_2 = 0;
end
end
// 3-2
if(set_mod==0 && set_clock==1)
begin
// 3-2-1
if(set_option==1)
begin
if(clear==0)
begin
if(clock_sec==59) clock_sec = 0;
else clock_sec = clock_sec + 1;
end
else clock_sec = 0;
end
// 3-2-2
else
begin
if(clear==0)
begin
if(clock_min==59) clock_min = 0;
else clock_min = clock_min + 1;
end
else clock_min = 0;
end
end
end
//the fourth module
always@(sec_1 or min_1 or sec_2 or min_2)
begin
// 4-1
if(set_mod==1)
begin
sec = sec_1;
min = min_1;
end
// 4-2
if(set_mod==0 && set_clock==0)
begin
sec = sec_2;
min = min_2;
end
end
//the fifth module
always@(min or sec or clock_min or clock_sec)
begin
// 5-1
if(set_clock==0)
begin
// 5-1-1
case(min)
6'd0:out1=14'b0000001_0000001;
6'd1:out1=14'b0000001_1001111;
6'd2:out1=14'b0000001_0010010;
6'd3:out1=14'b0000001_0000110;
6'd4:out1=14'b0000001_1001100;
6'd5:out1=14'b0000001_0100100;
6'd6:out1=14'b0000001_0100000;
6'd7:out1=14'b0000001_0001111;
6'd8:out1=14'b0000001_0000000;
6'd9:out1=14'b0000001_0000100;
6'd10:out1=14'b1001111_0000001;
6'd11:out1=14'b1001111_1001111;
6'd12:out1=14'b1001111_0010010;
6'd13:out1=14'b1001111_0000110;
6'd14:out1=14'b1001111_1001100;
6'd15:out1=14'b1001111_0100100;
6'd16:out1=14'b1001111_0100000;
6'd17:out1=14'b1001111_0001111;
6'd18:out1=14'b1001111_0000000;
6'd19:out1=14'b1001111_0000100;
6'd20:out1=14'b0010010_0000001;
6'd21:out1=14'b0010010_1001111;
6'd22:out1=14'b0010010_0010010;
6'd23:out1=14'b0010010_0000110;
6'd24:out1=14'b0010010_1001100;
6'd25:out1=14'b0010010_0100100;
6'd26:out1=14'b0010010_0100000;
6'd27:out1=14'b0010010_0001111;
6'd28:out1=14'b0010010_0000000;
6'd29:out1=14'b0010010_0000100;
6'd30:out1=14'b0000110_0000001;
6'd31:out1=14'b0000110_1001111;
6'd32:out1=14'b0000110_0010010;
6'd33:out1=14'b0000110_0000110;
6'd34:out1=14'b0000110_1001100;
6'd35:out1=14'b0000110_0100100;
6'd36:out1=14'b0000110_0100000;
6'd37:out1=14'b0000110_0001111;
6'd38:out1=14'b0000110_0000000;
6'd39:out1=14'b0000110_0000100;
6'd40:out1=14'b1001100_0000001;
6'd41:out1=14'b1001100_1001111;
6'd42:out1=14'b1001100_0010010;
6'd43:out1=14'b1001100_0000110;
6'd44:out1=14'b1001100_1001100;
6'd45:out1=14'b1001100_0100100;
6'd46:out1=14'b1001100_0100000;
6'd47:out1=14'b1001100_0001111;
6'd48:out1=14'b1001100_0000000;
6'd49:out1=14'b1001100_0000100;
6'd50:out1=14'b0100100_0000001;
6'd51:out1=14'b0100100_1001111;
6'd52:out1=14'b0100100_0010010;
6'd53:out1=14'b0100100_0000110;
6'd54:out1=14'b0100100_1001100;
6'd55:out1=14'b0100100_0100100;
6'd56:out1=14'b0100100_0100000;
6'd57:out1=14'b0100100_0001111;
6'd58:out1=14'b0100100_0000000;
6'd59:out1=14'b0100100_0000100;
default:out1=14'b1111111_1111111;
endcase
// 5-1-2
case(sec)
6'd0:out2=14'b0000001_0000001;
6'd1:out2=14'b0000001_1001111;
6'd2:out2=14'b0000001_0010010;
6'd3:out2=14'b0000001_0000110;
6'd4:out2=14'b0000001_1001100;
6'd5:out2=14'b0000001_0100100;
6'd6:out2=14'b0000001_0100000;
6'd7:out2=14'b0000001_0001111;
6'd8:out2=14'b0000001_0000000;
6'd9:out2=14'b0000001_0000100;
6'd10:out2=14'b1001111_0000001;
6'd11:out2=14'b1001111_1001111;
6'd12:out2=14'b1001111_0010010;
6'd13:out2=14'b1001111_0000110;
6'd14:out2=14'b1001111_1001100;
6'd15:out2=14'b1001111_0100100;
6'd16:out2=14'b1001111_0100000;
6'd17:out2=14'b1001111_0001111;
6'd18:out2=14'b1001111_0000000;
6'd19:out2=14'b1001111_0000100;
6'd20:out2=14'b0010010_0000001;
6'd21:out2=14'b0010010_1001111;
6'd22:out2=14'b0010010_0010010;
6'd23:out2=14'b0010010_0000110;
6'd24:out2=14'b0010010_1001100;
6'd25:out2=14'b0010010_0100100;
6'd26:out2=14'b0010010_0100000;
6'd27:out2=14'b0010010_0001111;
6'd28:out2=14'b0010010_0000000;
6'd29:out2=14'b0010010_0000100;
6'd30:out2=14'b0000110_0000001;
6'd31:out2=14'b0000110_1001111;
6'd32:out2=14'b0000110_0010010;
6'd33:out2=14'b0000110_0000110;
6'd34:out2=14'b0000110_1001100;
6'd35:out2=14'b0000110_0100100;
6'd36:out2=14'b0000110_0100000;
6'd37:out2=14'b0000110_0001111;
6'd38:out2=14'b0000110_0000000;
6'd39:out2=14'b0000110_0000100;
6'd40:out2=14'b1001100_0000001;
6'd41:out2=14'b1001100_1001111;
6'd42:out2=14'b1001100_0010010;
6'd43:out2=14'b1001100_0000110;
6'd44:out2=14'b1001100_1001100;
6'd45:out2=14'b1001100_0100100;
6'd46:out2=14'b1001100_0100000;
6'd47:out2=14'b1001100_0001111;
6'd48:out2=14'b1001100_0000000;
6'd49:out2=14'b1001100_0000100;
6'd50:out2=14'b0100100_0000001;
6'd51:out2=14'b0100100_1001111;
6'd52:out2=14'b0100100_0010010;
6'd53:out2=14'b0100100_0000110;
6'd54:out2=14'b0100100_1001100;
6'd55:out2=14'b0100100_0100100;
6'd56:out2=14'b0100100_0100000;
6'd57:out2=14'b0100100_0001111;
6'd58:out2=14'b0100100_0000000;
6'd59:out2=14'b0100100_0000100;
default:out2=14'b1111111_1111111;
endcase
end
// 5-2
else
begin
// 5-2-1
case(clock_min)
6'd0:out1=14'b0000001_0000001;
6'd1:out1=14'b0000001_1001111;
6'd2:out1=14'b0000001_0010010;
6'd3:out1=14'b0000001_0000110;
6'd4:out1=14'b0000001_1001100;
6'd5:out1=14'b0000001_0100100;
6'd6:out1=14'b0000001_0100000;
6'd7:out1=14'b0000001_0001111;
6'd8:out1=14'b0000001_0000000;
6'd9:out1=14'b0000001_0000100;
6'd10:out1=14'b1001111_0000001;
6'd11:out1=14'b1001111_1001111;
6'd12:out1=14'b1001111_0010010;
6'd13:out1=14'b1001111_0000110;
6'd14:out1=14'b1001111_1001100;
6'd15:out1=14'b1001111_0100100;
6'd16:out1=14'b1001111_0100000;
6'd17:out1=14'b1001111_0001111;
6'd18:out1=14'b1001111_0000000;
6'd19:out1=14'b1001111_0000100;
6'd20:out1=14'b0010010_0000001;
6'd21:out1=14'b0010010_1001111;
6'd22:out1=14'b0010010_0010010;
6'd23:out1=14'b0010010_0000110;
6'd24:out1=14'b0010010_1001100;
6'd25:out1=14'b0010010_0100100;
6'd26:out1=14'b0010010_0100000;
6'd27:out1=14'b0010010_0001111;
6'd28:out1=14'b0010010_0000000;
6'd29:out1=14'b0010010_0000100;
6'd30:out1=14'b0000110_0000001;
6'd31:out1=14'b0000110_1001111;
6'd32:out1=14'b0000110_0010010;
6'd33:out1=14'b0000110_0000110;
6'd34:out1=14'b0000110_1001100;
6'd35:out1=14'b0000110_0100100;
6'd36:out1=14'b0000110_0100000;
6'd37:out1=14'b0000110_0001111;
6'd38:out1=14'b0000110_0000000;
6'd39:out1=14'b0000110_0000100;
6'd40:out1=14'b1001100_1111110;
6'd41:out1=14'b1001100_1001111;
6'd42:out1=14'b1001100_0010010;
6'd43:out1=14'b1001100_0000110;
6'd44:out1=14'b1001100_1001100;
6'd45:out1=14'b1001100_0100100;
6'd46:out1=14'b1001100_0100000;
6'd47:out1=14'b1001100_0001111;
6'd48:out1=14'b1001100_0000000;
6'd49:out1=14'b1001100_0000100;
6'd50:out1=14'b0100100_1111110;
6'd51:out1=14'b0100100_1001111;
6'd52:out1=14'b0100100_0010010;
6'd53:out1=14'b0100100_0000110;
6'd54:out1=14'b0100100_1001100;
6'd55:out1=14'b0100100_0100100;
6'd56:out1=14'b0100100_0100000;
6'd57:out1=14'b0100100_0001111;
6'd58:out1=14'b0100100_0000000;
6'd59:out1=14'b0100100_0000100;
default:out1=14'b1000100_1000100;
endcase
// 5-2-2
case(clock_sec)
6'd0:out2=14'b0000001_0000001;
6'd1:out2=14'b0000001_1001111;
6'd2:out2=14'b0000001_0010010;
6'd3:out2=14'b0000001_0000110;
6'd4:out2=14'b0000001_1001100;
6'd5:out2=14'b0000001_0100100;
6'd6:out2=14'b0000001_0100000;
6'd7:out2=14'b0000001_0001111;
6'd8:out2=14'b0000001_0000000;
6'd9:out2=14'b0000001_0000100;
6'd10:out2=14'b1001111_0000001;
6'd11:out2=14'b1001111_1001111;
6'd12:out2=14'b1001111_0010010;
6'd13:out2=14'b1001111_0000110;
6'd14:out2=14'b1001111_1001100;
6'd15:out2=14'b1001111_0100100;
6'd16:out2=14'b1001111_0100000;
6'd17:out2=14'b1001111_0001111;
6'd18:out2=14'b1001111_0000000;
6'd19:out2=14'b1001111_0000100;
6'd20:out2=14'b0010010_0000001;
6'd21:out2=14'b0010010_1001111;
6'd22:out2=14'b0010010_0010010;
6'd23:out2=14'b0010010_0000110;
6'd24:out2=14'b0010010_1001100;
6'd25:out2=14'b0010010_0100100;
6'd26:out2=14'b0010010_0100000;
6'd27:out2=14'b0010010_0001111;
6'd28:out2=14'b0010010_0000000;
6'd29:out2=14'b0010010_0000100;
6'd30:out2=14'b0000110_0000001;
6'd31:out2=14'b0000110_1001111;
6'd32:out2=14'b0000110_0010010;
6'd33:out2=14'b0000110_0000110;
6'd34:out2=14'b0000110_1001100;
6'd35:out2=14'b0000110_0100100;
6'd36:out2=14'b0000110_0100000;
6'd37:out2=14'b0000110_0001111;
6'd38:out2=14'b0000110_0000000;
6'd39:out2=14'b0000110_0000100;
6'd40:out2=14'b1001100_0000001;
6'd41:out2=14'b1001100_1001111;
6'd42:out2=14'b1001100_0010010;
6'd43:out2=14'b1001100_0000110;
6'd44:out2=14'b1001100_1001100;
6'd45:out2=14'b1001100_0100100;
6'd46:out2=14'b1001100_0100000;
6'd47:out2=14'b1001100_0001111;
6'd48:out2=14'b1001100_0000000;
6'd49:out2=14'b1001100_0000100;
6'd50:out2=14'b0100100_0000001;
6'd51:out2=14'b0100100_1001111;
6'd52:out2=14'b0100100_0010010;
6'd53:out2=14'b0100100_0000110;
6'd54:out2=14'b0100100_1001100;
6'd55:out2=14'b0100100_0100100;
6'd56:out2=14'b0100100_0100000;
6'd57:out2=14'b0100100_0001111;
6'd58:out2=14'b0100100_0000000;
6'd59:out2=14'b0100100_0000100;
default:out2=14'b1000100_1000100;
endcase
end
end
//the sixth module
parameter s0=4'd0,s1=4'd1,s2=4'd2,s3=4'd3,s4=4'd4,
s5=4'd5,s6=4'd6,s7=4'd7,s8=4'd8,s9=4'd9;
always@(CS)
begin
case(CS)
4'd0:led=8'b00000000;
4'd1:led=8'b11111111;
4'd2:led=8'b11111111;
4'd3:led=8'b11100111;
4'd4:led=8'b11000011;
4'd5:led=8'b10000001;
4'd6:led=8'b11000011;
4'd7:led=8'b11100111;
4'd8:led=8'b11111111;
4'd9:led=8'b00000000;
default:led=8'b00000000;
endcase
end
endmodule