Experiment 2 design of function adjustable comprehensive timer

• The experiment purpose

1. master QuartusII And other experimental tools 、 comprehensive 、 Simulation 、 How to use the download
2. master DE2 The functional characteristics and application methods of the developed version of the device
3. master Verilog HDL The main methods and techniques of sequential logic system design
4. Master and apply EDA Design method and process

• Preview requirements

1. understand QuartusII Equal Discipline Distribution 、 Download method and process
2. Understand the input of development board 、 The output shows the working characteristics of the resource
3. Understand development board design 、 Development and testing methods and processes

• The experimental requirements

Design an adjustable integrated timer . Specific function ：

1. Show hours 、 branch 、 second , Provide zero setting function . Displayed in seven section pipe or LCD On the screen , You can consider 24/12 Hour mode switching function .
2. Capable of measuring seconds 、 branch 、 Hours are modified separately , It can be modified as a whole with two digits or independently with each digit
3. The hour report function , The whole point can show a certain form of LED To express .
4. Alarm function , Set a specific time , Arrive at a specific time LED Display to display the alarm clock . Pay attention to the duration of the alarm clock , You can also refer to the lazy alarm clock mode .

The initial operation is almost similar to experiment 1 , Please refer to Experiment 1 link ：Quartus Prime Hardware experimental development （DE2-115 plate ） Experiment 1 CPU Instruction arithmetic unit design _ Slag ye The blog of -CSDN Blog

It should be noted that , In Experiment 2 , need Replace the value corresponding to the pin , The specific value table is linked as follows ：

FPGA Hardware Experiment 2 function adjustable comprehensive timer design experimental design pin setting - Dataset document class resources -CSDN download

The main body of code ：

module shizhong(clkin,key0,hex0,hex1,hex2,hex3,hex4,hex5,hex6,hex7,KEY0,KEY1,key17,key16,key15,LEDR,LEDG,in,key14,key13,key12);
input clkin;
input key0,key17,key16,key15,key14,key13,key12;
input[6:1] in;
input KEY0,KEY1;
reg clk=0;
output reg[6:0] hex0,hex1,hex2,hex3,hex4,hex5,hex6,hex7;
output reg[7:0] LEDR,LEDG;
reg[7:0] out2,out3,out4,out5,out6,out7; 
reg[7:0] second;
reg[7:0] minute;
reg[7:0] hour;
reg[7:0] second1;
reg[7:0] minute1;
reg[7:0] hour1;
integer N=25000000;
integer i=0;
reg[16:0] naozhong=0;
reg[16:0] s=0;
integer a=86400;

always@(posedge clkin) // frequency division 
begin
if(i==N)
	begin
		i=0;
		clk=~clk;
	end
else i=i+1;
end

always@(posedge clk)
begin
if(key0) s=0; // Zeroing 
else 
// Count 
begin
// It's time for the hour 
if(s%3600==0)
begin 
LEDR=8'b11111111;
end
else
	begin
		LEDR=8'b00000000;
		s=(s+1)%a;
	end
if(key17&&key16==0&&key15==0) // Adjust the hours 
	begin
		if(KEY0==0)s=(s+3600)%a;
		else if(KEY1==0)s=(s-3600)%a;
		else s=s%a;
	end
else if(key17==0&&key16&&key15==0)   // Adjust the minutes 
	begin
		if(KEY0==0)s=(s+60)%a;
		else if(KEY1==0)s=(s-60)%a;
		else s=s%a;
	end
else if(key17==0&&key16==0&&key15)   // Adjust the second 
	begin
		if(KEY0==0)s=(s+1)%a;
		
		else if(KEY1==0)s=(s-1)%a;
		else s=s%a;
	end
end
end


always@(key17,key16,key15,s)
begin
// alarm clock 
if(key17==1&&key16==1&&key15==1)
	begin
		naozhong = 0;
		if(key12)naozhong=naozhong+in;
		else if(key13)naozhong=naozhong+in*60;
		else if(key14)naozhong=naozhong+in*3600;
		else naozhong=naozhong;

		second1=naozhong%60;
		minute1=naozhong/60%60;
		hour1=naozhong/3600;
		out7=hour1/10;
		out6=hour1%10;
		out5=minute1/10;
		out4=minute1%10;
		out3=second1/10;
		out2=second1%10;
		hex7=seven(out7);
		hex6=seven(out6);
		hex5=seven(out5);
		hex4=seven(out4);
		hex3=seven(out3);
		hex2=seven(out2);
		hex1=7'b1111111;
		hex0=7'b1111111;
	end
else
	begin
		second=s%60;minute=s/60%60;hour=s/3600;
		out7=hour/10;out6=hour%10;
		out5=minute/10;out4=minute%10;
		out3=second/10;out2=second%10;
		hex7=seven(out7);
		hex6=seven(out6);
		hex5=seven(out5);
		hex4=seven(out4);
		hex3=seven(out3);
		hex2=seven(out2);
		hex1=7'b1111111;
		hex0=7'b1111111;
	if(s==naozhong)LEDG=8'b11111111;
	else LEDG=8'b00000000;
	end

end


function[6:0] seven;
input [7:0] din;
case(din)
	4'h0:seven=7'b1000000;
	4'h1:seven=7'b1111001;
	4'h2:seven=7'b0100100;
	4'h3:seven=7'b0110000;
	4'h4:seven=7'b0011001;
	4'h5:seven=7'b0010010;
	4'h6:seven=7'b0000010;
	4'h7:seven=7'b1111000;
	4'h8:seven=7'b0000000;
	4'h9:seven=7'b0010000;
	default:seven=7'b1111111;
endcase
endfunction
endmodule

Hardware testing ：

Zeroing

Control time

set alarm , Time out , The green light is on