一、功能介绍
本次数字逻辑与EDA实验课程设计我设计的是电子闹钟，该电子闹钟具体能实现的功能如下：
基本功能
- 正常时间和闹钟时间显示功能
- 闹钟触发功能
设计功能
- 手动设置和修改闹钟时间功能
- 当正常时间有误时，矫正时间功能
- 利用有限状态机设计闹钟触发30s的LED彩灯提示功能
二、设计思路
首先设计一个分频模块，将50mhz的时钟分频得到1hz的时钟，分频的方法在前面的几次实验中多次用到。其次，是设计时钟模块，通过得到的1hz的时钟，在时钟上升沿进行触发，分别设置分钟和秒，当秒为59时，置零，然后分钟加1。当数满一个小时时，自动归零。然后需要设置修改正常时间和闹钟时间的模块，我通过引入寄存器型变量，能够临时存储修改的值，并且增加标记位的方式实现该模块。其次，还需要设置时间显示模块，通过控制输出，并进行管脚分配来在7段数码管上显示。最后还需设置一个闹钟触发模块，通过有限状态机设计，实现LED彩灯提示。
三、模块结构
四、代码及其注释
module clock(clk50mhz,clr,mod_time,mod_clock,mod_min,mod_sec,led,out1,out2,out3,out4);
(*chip_pin="Y2"*)input clk50mhz;
(*chip_pin="AB28"*)input clr; //SW[0] 清零信号，clear=1时时钟清零
(*chip_pin="M23"*)input mod_time; //KRY[0] 修改正常时间
(*chip_pin="M21"*)input mod_clock; //KEY[1] 设置（修改）闹钟时间
(*chip_pin="AD26,AC26,AB27,AD27,AC27,AC28"*)input [5:0] mod_min; //修改的分 SW[6]-SW[1]
(*chip_pin="AB23,AB24,AC24,AB25,AC25,AB26"*)input [5:0] mod_sec; //修改的秒 SW[12]-SW[7]
(*chip_pin="G21,G22,G20,H21,E24,E25,E22,E21"*)output reg[7:0] led; //LED黄灯
(*chip_pin="V21,U21,AB20,AA21,AD24,AF23,Y19,AA25,AA26,Y25,W26,Y26,W27,W28"*)output reg[13:0] out1;//HEX[3]与HEX[2] min
(*chip_pin="M24,Y22,W21,W22,W25,U23,U24,G18,F22,E17,L26,L25,J22,H22"*)output reg[13:0] out2; //HEX[1]与HEX[0] sec
(*chip_pin="AD17,AE17,AG17,AH17,AF17,AG18,AA14,AA17,AB16,AA16,AB17,AB15,AA15,AC17"*)output reg[13:0] out3; //HEX[7]与HEX[6] clock_min
(*chip_pin="AD18,AC18,AB18,AH19,AG19,AF18,AH18,AB19,AA19,AG21,AH21,AE19,AF19,AE18"*)output reg[13:0] out4; //HEX[5]与HEX[4] clock_sec
reg[5:0] min; //正常分钟
reg[5:0] sec; //正常秒
reg[5:0] clock_min=0;//闹钟分钟
reg[5:0] clock_sec=10; //闹钟秒
reg[5:0] min_temp;
reg[5:0] sec_temp;
reg flag=0; //时钟触发信号
reg flag_mod_time;
//1.分频模块,得到1s时钟信号
reg clk1hz;
reg[24:0] cout;
always@(posedge clk50mhz)
begin
if(cout==25'd24999999)
begin
cout = 0;
clk1hz = ~clk1hz;
end
else
cout = cout + 1;
end
//2.正常时间模块
always@(posedge clk1hz)
begin
if(clr)
begin
min=0;
sec=0;
end
else if(flag_mod_time)
begin
min=min_temp;
sec=sec_temp;
end
else
begin
if(sec==6'd59 && min==6'd59)
begin
sec=0;
min=0;
end
else if(sec==6'd59)
begin
sec=0;
min=min+1;
end
else
begin
sec=sec+1;
min=min;
end
end
if(min==clock_min && sec==clock_sec)
flag=1;
else if(min*60+sec-clock_min*60-clock_sec>30)
begin
flag=0;
end
end
//3.修改正常时间
always@(mod_time)
begin
if(mod_time==0)
begin
min_temp=mod_min;
sec_temp=mod_sec;
flag_mod_time=1;
end
else
begin
min_temp=min_temp;
sec_temp=sec_temp;
flag_mod_time=0;
end
end
//4.修改闹钟时间
always@(mod_clock)
begin
if(mod_clock==0)
begin
clock_min=mod_min;
clock_sec=mod_sec;
end
else
begin
clock_min=clock_min;
clock_sec=clock_sec;
end
end
//5.显示正常时间和闹钟时间
always@(min or sec or clock_min or clock_sec)
begin
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
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
case(clock_min)
6'd0:out3=14'b0000001_0000001;
6'd1:out3=14'b0000001_1001111;
6'd2:out3=14'b0000001_0010010;
6'd3:out3=14'b0000001_0000110;
6'd4:out3=14'b0000001_1001100;
6'd5:out3=14'b0000001_0100100;
6'd6:out3=14'b0000001_0100000;
6'd7:out3=14'b0000001_0001111;
6'd8:out3=14'b0000001_0000000;
6'd9:out3=14'b0000001_0000100;
6'd10:out3=14'b1001111_0000001;
6'd11:out3=14'b1001111_1001111;
6'd12:out3=14'b1001111_0010010;
6'd13:out3=14'b1001111_0000110;
6'd14:out3=14'b1001111_1001100;
6'd15:out3=14'b1001111_0100100;
6'd16:out3=14'b1001111_0100000;
6'd17:out3=14'b1001111_0001111;
6'd18:out3=14'b1001111_0000000;
6'd19:out3=14'b1001111_0000100;
6'd20:out3=14'b0010010_0000001;
6'd21:out3=14'b0010010_1001111;
6'd22:out3=14'b0010010_0010010;
6'd23:out3=14'b0010010_0000110;
6'd24:out3=14'b0010010_1001100;
6'd25:out3=14'b0010010_0100100;
6'd26:out3=14'b0010010_0100000;
6'd27:out3=14'b0010010_0001111;
6'd28:out3=14'b0010010_0000000;
6'd29:out3=14'b0010010_0000100;
6'd30:out3=14'b0000110_0000001;
6'd31:out3=14'b0000110_1001111;
6'd32:out3=14'b0000110_0010010;
6'd33:out3=14'b0000110_0000110;
6'd34:out3=14'b0000110_1001100;
6'd35:out3=14'b0000110_0100100;
6'd36:out3=14'b0000110_0100000;
6'd37:out3=14'b0000110_0001111;
6'd38:out3=14'b0000110_0000000;
6'd39:out3=14'b0000110_0000100;
6'd40:out3=14'b1001100_1111110;
6'd41:out3=14'b1001100_1001111;
6'd42:out3=14'b1001100_0010010;
6'd43:out3=14'b1001100_0000110;
6'd44:out3=14'b1001100_1001100;
6'd45:out3=14'b1001100_0100100;
6'd46:out3=14'b1001100_0100000;
6'd47:out3=14'b1001100_0001111;
6'd48:out3=14'b1001100_0000000;
6'd49:out3=14'b1001100_0000100;
6'd50:out3=14'b0100100_1111110;
6'd51:out3=14'b0100100_1001111;
6'd52:out3=14'b0100100_0010010;
6'd53:out3=14'b0100100_0000110;
6'd54:out3=14'b0100100_1001100;
6'd55:out3=14'b0100100_0100100;
6'd56:out3=14'b0100100_0100000;
6'd57:out3=14'b0100100_0001111;
6'd58:out3=14'b0100100_0000000;
6'd59:out3=14'b0100100_0000100;
default:out3=14'b1000100_1000100;
endcase
case(clock_sec)
6'd0:out4=14'b0000001_0000001;
6'd1:out4=14'b0000001_1001111;
6'd2:out4=14'b0000001_0010010;
6'd3:out4=14'b0000001_0000110;
6'd4:out4=14'b0000001_1001100;
6'd5:out4=14'b0000001_0100100;
6'd6:out4=14'b0000001_0100000;
6'd7:out4=14'b0000001_0001111;
6'd8:out4=14'b0000001_0000000;
6'd9:out4=14'b0000001_0000100;
6'd10:out4=14'b1001111_0000001;
6'd11:out4=14'b1001111_1001111;
6'd12:out4=14'b1001111_0010010;
6'd13:out4=14'b1001111_0000110;
6'd14:out4=14'b1001111_1001100;
6'd15:out4=14'b1001111_0100100;
6'd16:out4=14'b1001111_0100000;
6'd17:out4=14'b1001111_0001111;
6'd18:out4=14'b1001111_0000000;
6'd19:out4=14'b1001111_0000100;
6'd20:out4=14'b0010010_0000001;
6'd21:out4=14'b0010010_1001111;
6'd22:out4=14'b0010010_0010010;
6'd23:out4=14'b0010010_0000110;
6'd24:out4=14'b0010010_1001100;
6'd25:out4=14'b0010010_0100100;
6'd26:out4=14'b0010010_0100000;
6'd27:out4=14'b0010010_0001111;
6'd28:out4=14'b0010010_0000000;
6'd29:out4=14'b0010010_0000100;
6'd30:out4=14'b0000110_0000001;
6'd31:out4=14'b0000110_1001111;
6'd32:out4=14'b0000110_0010010;
6'd33:out4=14'b0000110_0000110;
6'd34:out4=14'b0000110_1001100;
6'd35:out4=14'b0000110_0100100;
6'd36:out4=14'b0000110_0100000;
6'd37:out4=14'b0000110_0001111;
6'd38:out4=14'b0000110_0000000;
6'd39:out4=14'b0000110_0000100;
6'd40:out4=14'b1001100_0000001;
6'd41:out4=14'b1001100_1001111;
6'd42:out4=14'b1001100_0010010;
6'd43:out4=14'b1001100_0000110;
6'd44:out4=14'b1001100_1001100;
6'd45:out4=14'b1001100_0100100;
6'd46:out4=14'b1001100_0100000;
6'd47:out4=14'b1001100_0001111;
6'd48:out4=14'b1001100_0000000;
6'd49:out4=14'b1001100_0000100;
6'd50:out4=14'b0100100_0000001;
6'd51:out4=14'b0100100_1001111;
6'd52:out4=14'b0100100_0010010;
6'd53:out4=14'b0100100_0000110;
6'd54:out4=14'b0100100_1001100;
6'd55:out4=14'b0100100_0100100;
6'd56:out4=14'b0100100_0100000;
6'd57:out4=14'b0100100_0001111;
6'd58:out4=14'b0100100_0000000;
6'd59:out4=14'b0100100_0000100;
default:out4=14'b1000100_1000100;
endcase
end
//6.闹钟触发模块
reg[3:0] cs;
reg[3:0] ns;
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@(posedge clk1hz)
begin
if(flag==1)
begin
cs=ns;
end
else cs=s0;
end
always@(cs)
begin
case(cs)
s0:ns=s1;
s1:ns=s2;
s2:ns=s3;
s3:ns=s4;
s4:ns=s5;
s5:ns=s6;
s6:ns=s7;
s7:ns=s8;
s8:ns=s9;
s9:ns=s0;
default:ns=s0;
endcase
end
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
效果展示
