我是靠谱客的博主 优秀寒风,最近开发中收集的这篇文章主要介绍EDA实验(Quartus Ⅱ+fpga) (五)---多功能数字钟设计,觉得挺不错的,现在分享给大家,希望可以做个参考。

概述

前言:
本文主要介绍了EDA原理与应用这门课程的相关实验及代码。使用的软件是Quartus Ⅱ,该实验使用fpga芯片为cycloneⅤ 5CSEMA5F31C6。
(一)实验目的
(1)了解数字钟的工作原理;
(2)掌握综合且较复杂数字系统设计方法;
(3)掌握多层次、多模块数字系统设计方法。
(二)设计要求
设计一个多功能数字钟:
(1)数码管显示时、分、秒;
(2)具有正常计时和调时、调分等校时功能;
(3) 经设置应具有整点报时功能(在59分56秒后开始报时,并用一串LED管显示);
(4)经设置应具有闹钟功能(用LED管点亮表示,时间为一分钟)。
其他扩展功能自行设置。
分析:
系统需要两个六十进制计数器用于分钟和秒的计时,为方便译码采用10进制计数加6进制计数的方式;
系统需要一个24/12模可变的计数器用于小时的计时,为方便译码采用10进制计数加2/4进制计数的方式,一个模式控制输入端,一个进位输出端,用于扩展为日计时,一个模式输出用于指示当前模;设置为一个模10/4/2可变的计数器,其进位给一个模3的计数器,模3计数器的状态与模式输入一起决定模10/4/2可变的计数器的模式。
时分秒的计数器的时钟信号要前置一个选择模块,用于选择时种来源,即正常的计数时钟及调节时钟,以及一个允许/禁止输入用于控制是否输出时钟信号。
为提高计时准确度,秒的计数脉冲由外电路分频为0.1秒后由调节模块处理;
调节模块处理包含一个前置的模10计数器,用于将生成0.1秒的调节脉冲和1秒的计时脉冲。工作与否由调节模块的调节输入决定;
调节模块处理还包含一个模5计数器,用于当数字钟处于调节状态下,监测调节键按下的时间。调节键按下时允许0.1秒计数脉冲作用,否则以键按下产生的脉冲作为计数脉冲。调节按键没有被按下时,停止;
驱动数码管显示需要的bcd-7段显示码译码器;
功能键每按下恢复时,产生秒-分钟-小时-计时的切换,同一时间只允许其中之一的计数器使能计数,并且通过对调节模块的控制,改变时钟信号。
(三)实验代码

/*	
	mode 
		mb
			计时
				st-->开始计时(1)-->暂停计时(0)-->开始计时...
				rst-暂停计时时-->归零
		en
		  0 时间显示
				小时:0-23
				分钟:0-59
				秒:0-59
		  1 闹钟设置
				st--加1(默认分钟)
				rd--减1
				rst--切换小时/分钟设置		默认分钟-->小时-->分钟
					小时:0-23
					分钟:0-59
				mode-->返回时间显示(按过st,rst) 
		  2 时间设置
				st--
					秒(默认)-->归0
					分钟/分钟-->+1
				rd--
					秒(默认)-->归0
					分钟/分钟-->+1
				rst-->
					秒-->分钟-->小时
				mode-->返回时间显示(按过st,rst) 
*/
module clock(
				input clk1,en,clr,mb,
				input mode_an,st_an,rd_an,rst_an,//功能键,显示日期/加,减,预设闹钟时间/调整位置	
				
				output reg clk,	
				output reg [2:0] mode,			//功能
				output reg [5:0] shi,fen,miao,	//储存时分秒
				output reg [5:0] jss,jsf,jsm,		//储存计时							
				output reg [5:0] nzs,nzf,nzjs,	//闹钟时,分,闹钟计时
				output reg zddis,nzdis,				//整点报时,闹钟显示	
				output reg [6:0] SG0,SG1,SG2,SG3,SG4,SG5     //数码管的值  
					);
//wire !mode_an,!st_an,!rd_an,!rst_an;		//按键 按下--1
reg [5:0] rtmode;			//返回时间显示界面
reg js;						//计时设置时情况 1-开始计时,0-暂停
reg nz;						//闹钟设置情况	1-小时,0-分钟
reg [1:0]sj;				//时间设置情况	2-小时,1-分钟,0-秒

wire [3:0] miaog,miaos,feng,fens,shig,shis;	//数码管显示时间
wire [3:0] jsmg,jsms,jsfg,jsfs,jssg,jsss;	//数码管显示计时
wire [3:0] nzfg,nzfs,nzsg,nzss;				//数码管显 示闹钟
reg [30:0] cnt;

always @(posedge clk1)
	if(mb)
		begin cnt=cnt+1;
			if(cnt>10) 
				begin clk=1'b1;cnt=0; end
			else clk=1'b0;
		end
	else if(en)
		begin cnt=cnt+1;
				if(cnt>1) 
					begin clk=1'b0;cnt=0; end
				else clk=1'b1;
		end
		
always @(posedge clk or posedge clr)
begin
	if(clr)
		begin 
			mode<=0;
			shi<=23;fen<=59;miao<=56; sj<=0;
			jss<=0;jsf<=0;jsm<=0;js<=0;
			nzs<=0;nzf<=0;nz<=0;	
		end
	else if(mb)
		begin
			begin
						if(!st_an)	//按下st,开始计时,再按下暂停计时。。
							begin
								js<=js+1;
								if(js==1)
									js<=0;							
							end
						begin
							case(js)
								0:	//暂停时间
									begin
										if(!rst_an)	//按下rst置0
											begin 
												jsm<=0;jsf<=0;jss<=0;
											end		
									end
								1://开始计时
									begin	
										jsm<=jsm+1;
										if(jsm==99)
										begin 
											jsf<=jsf+1;jsm<=0; 
											if(jsf==59)
											begin 
												jss<=jss+1;jsf<=0; 
												if(jss==59)
													begin jss<=0;	end
												end
											end
										end
								default:	begin jsm<=0;jsf<=0;jss<=0;end
							endcase
						end	
					end
		end
	else if(en)
		begin
			if(!mode_an)
				begin
					mode<=mode+1;
					if(mode==3)
						mode<=0;
				end
			case(mode)
				0://时间显示
					begin
						miao<=miao+1;
						if(miao==59)
							begin 
								fen<=fen+1;miao<=0; 
								if(fen==59)
									begin 
										shi<=shi+1;fen<=0; 
										if(shi==23)
										 begin shi<=0;	end
									end
							end
					end
				1://闹钟设置
					begin
						miao<=miao+1;
						if(miao==59)
							begin 
								fen<=fen+1;miao<=0; 
								if(fen==59)
									begin 
										shi<=shi+1;fen<=0; 
										if(shi==23)
											begin shi<=0;	end
									end
							end
						if(!rst_an)	//切换小时/分钟,默认分钟-小时(第一次按下rst)
							begin
								nz<=nz+1;
								rtmode<=rtmode+1;
								if(nz==1)
									nz<=0;
							end
						begin
							case(nz)
								0:	//调节闹钟分钟
									begin	
										if(!st_an)	//按下st,+1
										begin
											rtmode<=rtmode+1;
											nzf<=nzf+1;
											if(nzf==59)
												nzf<=0; 
										end
										if(!rd_an)	//按下rd,-1
										begin
											rtmode<=rtmode+1;
											nzf<=nzf-1;
											if(nzf==0)
												nzf<=59; 
										end
									end
								1:	//调节闹钟小时
									begin	
										if(!st_an)	//按下st,+1
										begin
											rtmode<=rtmode+1;
											nzs<=nzs+1;
											if(nzs==23)
												nzs<=0; 
										end
										if(!rd_an)	//按下rd,-1
										begin
											rtmode<=rtmode+1;
											nzs<=nzs-1;
											if(nzs==0)
												nzs<=23; 
										end
									end
								default:	begin nzf<=0;nzs<=0; end
							endcase
						end
						if(rtmode!=0&&!mode_an)	//按下mode返回时间显示
							begin mode<=0;rtmode<=0;nz<=0; end
					end
				2://时间设置
					begin
						if(!rst_an)	//秒(默认)/分钟/小时
							begin
								sj<=sj+1;
								rtmode<=rtmode+1;
								if(sj==2)
									sj<=0;
							end
						begin
							case(sj)
								0:	//秒
									begin	
										if(!st_an)	//重置
										begin
											rtmode<=rtmode+1;
											miao<=0;
										end
									end
								1: //分
									begin	
										if(!st_an)	//+1
										begin
											rtmode<=rtmode+1;
											fen<=fen+1;
											if(fen==59)
												fen<=0; 
										end
										if(!rd_an)	//-1
										begin
											rtmode<=rtmode+1;
											fen<=fen-1;
											if(fen==0)
												fen<=59; 
										end
									end
								2:	//小时
									begin	
										if(!st_an)	//+1
										begin
											rtmode<=rtmode+1;
											shi<=shi+1;
											if(shi==23)
												shi<=0; 
										end
										if(!rd_an)	//-1
										begin
											rtmode<=rtmode+1;
											shi<=shi-1;
											if(shi==0)
												shi<=23; 
										end
									end
								default:	begin shi<=0;fen<=0;miao<=0;end
							endcase
						end
						if(rtmode!=0&&!mode_an)	//按下mode返回时间显示
							begin mode<=0;rtmode<=0;sj<=0; end
					end
			endcase
		end
end

//整点报时		
always @(negedge clk)
		begin
			if(mode==0)	//时间显示时才报时
				begin
					if(fen==0&&miao==0)
						zddis<=1;
					else
						zddis<=0;
				end
		end
//闹钟		
always @(negedge clk)
		begin
			if(mode==0)	//时间显示时闹钟才启动
				begin
					if(fen==nzf&&shi==nzs)
						begin 
							nzdis<=1;nzjs<=nzjs+1; 
							if(nzjs==59)
							begin nzdis<=0;nzjs<=0; end
						end
					else if(fen!=nzf||shi!=nzs)
					begin nzdis<=0;nzjs<=0; end
				end
		end


assign miaos=miao/10;assign miaog=miao%10;assign fens=fen/10;assign feng=fen%10;assign shis=shi/10;assign shig=shi%10;
assign jsms=jsm/10;assign jsmg=jsm%10;assign jsfs=jsf/10;assign jsfg=jsf%10;assign jsss=jss/10;assign jssg=jss%10;
assign nzss=nzs/10;assign nzsg=nzs%10;assign nzfs=nzf/10;assign nzfg=nzf%10;
always @(negedge clk)
	begin	
		if(mb)
			begin
						case(jsmg)
								0:SG0<=7'b1000000; 1:SG0<=7'b1111001;
								2:SG0<=7'b0100100; 3:SG0<=7'b0110000;
								4:SG0<=7'b0011001; 5:SG0<=7'b0010010;
								6:SG0<=7'b0000010; 7:SG0<=7'b1111000;
								8:SG0<=7'b0000000; 9:SG0<=7'b0010000; //7段译码值 
						endcase
						case(jsms)
								0:SG1<=7'b1000000; 1:SG1<=7'b1111001;
								2:SG1<=7'b0100100; 3:SG1<=7'b0110000;
								4:SG1<=7'b0011001; 5:SG1<=7'b0010010;
								6:SG1<=7'b0000010; 7:SG1<=7'b1111000;
								8:SG1<=7'b0000000; 9:SG1<=7'b0010000; //7段译码值 
						endcase
						case(jsfg)
								0:SG2<=7'b1000000; 1:SG2<=7'b1111001;
								2:SG2<=7'b0100100; 3:SG2<=7'b0110000;
								4:SG2<=7'b0011001; 5:SG2<=7'b0010010;
								6:SG2<=7'b0000010; 7:SG2<=7'b1111000;
								8:SG2<=7'b0000000; 9:SG2<=7'b0010000; //7段译码值 
						endcase
						case(jsfs)
								0:SG3<=7'b1000000; 1:SG3<=7'b1111001;
								2:SG3<=7'b0100100; 3:SG3<=7'b0110000;
								4:SG3<=7'b0011001; 5:SG3<=7'b0010010;
								6:SG3<=7'b0000010; 7:SG3<=7'b1111000;
								8:SG3<=7'b0000000; 9:SG3<=7'b0010000; //7段译码值 
						endcase
						case(jssg)
								0:SG4<=7'b1000000; 1:SG4<=7'b1111001;
								2:SG4<=7'b0100100; 3:SG4<=7'b0110000;
								4:SG4<=7'b0011001; 5:SG4<=7'b0010010;
								6:SG4<=7'b0000010; 7:SG4<=7'b1111000;
								8:SG4<=7'b0000000; 9:SG4<=7'b0010000; //7段译码值 
						endcase
						case(jsss)
								0:SG5<=7'b1000000; 1:SG5<=7'b1111001;
								2:SG5<=7'b0100100; 3:SG5<=7'b0110000;
								4:SG5<=7'b0011001; 5:SG5<=7'b0010010;
								6:SG5<=7'b0000010; 7:SG5<=7'b1111000;
								8:SG5<=7'b0000000; 9:SG5<=7'b0010000; //7段译码值 
						endcase
					end
		else if(en)
			case(mode)
				0:	//显示时间
					begin 
						case(miaog)
								0:SG0<=7'b1000000; 1:SG0<=7'b1111001;
								2:SG0<=7'b0100100; 3:SG0<=7'b0110000;
								4:SG0<=7'b0011001; 5:SG0<=7'b0010010;
								6:SG0<=7'b0000010; 7:SG0<=7'b1111000;
								8:SG0<=7'b0000000; 9:SG0<=7'b0010000; //7段译码值 
								default: SG0<=7'b1111111;
						endcase
						case(miaos)
								0:SG1<=7'b1000000; 1:SG1<=7'b1111001;
								2:SG1<=7'b0100100; 3:SG1<=7'b0110000;
								4:SG1<=7'b0011001; 5:SG1<=7'b0010010;
								6:SG1<=7'b0000010; 7:SG1<=7'b1111000;
								8:SG1<=7'b0000000; 9:SG1<=7'b0010000; //7段译码值 
								default: SG1<=7'b1111111;
						endcase
						case(feng)
								0:SG2<=7'b1000000; 1:SG2<=7'b1111001;
								2:SG2<=7'b0100100; 3:SG2<=7'b0110000;
								4:SG2<=7'b0011001; 5:SG2<=7'b0010010;
								6:SG2<=7'b0000010; 7:SG2<=7'b1111000;
								8:SG2<=7'b0000000; 9:SG2<=7'b0010000; //7段译码值 
						endcase
						case(fens)
								0:SG3<=7'b1000000; 1:SG3<=7'b1111001;
								2:SG3<=7'b0100100; 3:SG3<=7'b0110000;
								4:SG3<=7'b0011001; 5:SG3<=7'b0010010;
								6:SG3<=7'b0000010; 7:SG3<=7'b1111000;
								8:SG3<=7'b0000000; 9:SG3<=7'b0010000; //7段译码值 
						endcase
						case(shig)
								0:SG4<=7'b1000000; 1:SG4<=7'b1111001;
								2:SG4<=7'b0100100; 3:SG4<=7'b0110000;
								4:SG4<=7'b0011001; 5:SG4<=7'b0010010;
								6:SG4<=7'b0000010; 7:SG4<=7'b1111000;
								8:SG4<=7'b0000000; 9:SG4<=7'b0010000; //7段译码值 
						endcase
						case(shis)
								0:SG5<=7'b1000000; 1:SG5<=7'b1111001;
								2:SG5<=7'b0100100; 3:SG5<=7'b0110000;
								4:SG5<=7'b0011001; 5:SG5<=7'b0010010;
								6:SG5<=7'b0000010; 7:SG5<=7'b1111000;
								8:SG5<=7'b0000000; 9:SG5<=7'b0010000; //7段译码值 
						endcase
					end
				1://闹钟显示
					begin				
						case(nzfg)
								0:SG0<=7'b1000000; 1:SG0<=7'b1111001;
								2:SG0<=7'b0100100; 3:SG0<=7'b0110000;
								4:SG0<=7'b0011001; 5:SG0<=7'b0010010;
								6:SG0<=7'b0000010; 7:SG0<=7'b1111000;
								8:SG0<=7'b0000000; 9:SG0<=7'b0010000; //7段译码值 
						endcase
						case(nzfs)
								0:SG1<=7'b1000000; 1:SG1<=7'b1111001;
								2:SG1<=7'b0100100; 3:SG1<=7'b0110000;
								4:SG1<=7'b0011001; 5:SG1<=7'b0010010;
								6:SG1<=7'b0000010; 7:SG1<=7'b1111000;
								8:SG1<=7'b0000000; 9:SG1<=7'b0010000; //7段译码值 
						endcase
						case(nzsg)
								0:SG2<=7'b1000000; 1:SG2<=7'b1111001;
								2:SG2<=7'b0100100; 3:SG2<=7'b0110000;
								4:SG2<=7'b0011001; 5:SG2<=7'b0010010;
								6:SG2<=7'b0000010; 7:SG2<=7'b1111000;
								8:SG2<=7'b0000000; 9:SG2<=7'b0010000; //7段译码值 
						endcase
						case(nzss)
								0:SG3<=7'b1000000; 1:SG3<=7'b1111001;
								2:SG3<=7'b0100100; 3:SG3<=7'b0110000;
								4:SG3<=7'b0011001; 5:SG3<=7'b0010010;
								6:SG3<=7'b0000010; 7:SG3<=7'b1111000;
								8:SG3<=7'b0000000; 9:SG3<=7'b0010000; //7段译码值 
						endcase
								SG4<=7'b1111111;SG5<=7'b1111111;
					end
				2:	//时间显示
					begin 
						case(miaog)
								0:SG0<=7'b1000000; 1:SG0<=7'b1111001;
								2:SG0<=7'b0100100; 3:SG0<=7'b0110000;
								4:SG0<=7'b0011001; 5:SG0<=7'b0010010;
								6:SG0<=7'b0000010; 7:SG0<=7'b1111000;
								8:SG0<=7'b0000000; 9:SG0<=7'b0010000; //7段译码值 
								default: SG0<=7'b1111111;
						endcase
						case(miaos)
								0:SG1<=7'b1000000; 1:SG1<=7'b1111001;
								2:SG1<=7'b0100100; 3:SG1<=7'b0110000;
								4:SG1<=7'b0011001; 5:SG1<=7'b0010010;
								6:SG1<=7'b0000010; 7:SG1<=7'b1111000;
								8:SG1<=7'b0000000; 9:SG1<=7'b0010000; //7段译码值 
								default: SG1<=7'b1111111;
						endcase
						case(feng)
								0:SG2<=7'b1000000; 1:SG2<=7'b1111001;
								2:SG2<=7'b0100100; 3:SG2<=7'b0110000;
								4:SG2<=7'b0011001; 5:SG2<=7'b0010010;
								6:SG2<=7'b0000010; 7:SG2<=7'b1111000;
								8:SG2<=7'b0000000; 9:SG2<=7'b0010000; //7段译码值 
						endcase
						case(fens)
								0:SG3<=7'b1000000; 1:SG3<=7'b1111001;
								2:SG3<=7'b0100100; 3:SG3<=7'b0110000;
								4:SG3<=7'b0011001; 5:SG3<=7'b0010010;
								6:SG3<=7'b0000010; 7:SG3<=7'b1111000;
								8:SG3<=7'b0000000; 9:SG3<=7'b0010000; //7段译码值 
						endcase
						case(shig)
								0:SG4<=7'b1000000; 1:SG4<=7'b1111001;
								2:SG4<=7'b0100100; 3:SG4<=7'b0110000;
								4:SG4<=7'b0011001; 5:SG4<=7'b0010010;
								6:SG4<=7'b0000010; 7:SG4<=7'b1111000;
								8:SG4<=7'b0000000; 9:SG4<=7'b0010000; //7段译码值 
						endcase
						case(shis)
								0:SG5<=7'b1000000; 1:SG5<=7'b1111001;
								2:SG5<=7'b0100100; 3:SG5<=7'b0110000;
								4:SG5<=7'b0011001; 5:SG5<=7'b0010010;
								6:SG5<=7'b0000010; 7:SG5<=7'b1111000;
								8:SG5<=7'b0000000; 9:SG5<=7'b0010000; //7段译码值 
						endcase
					end
			endcase
		end

endmodule

(四)管脚分配
Input
clk1 AF14 en AC12
Clr AB12 mb AF9
mode_an,st_an,rd_an,rst_an 按键3-1
Output
SG0,SG1,SG2,SG3,SG4,SG5 数码管0-5
zddis,nzdis, led9-8

最后

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