信号定义： clk： 标准时钟信号，本例中，其频率为4Hz； clk_1k： 产生闹铃音、报时音的时钟信号，本例中其频率为1024Hz； mode： 功能控制信号； 为0：计时功能； 为1：闹钟功能； 为2：手动校时功能； turn： 接按键，在手动校时功能时，选择是调整小时，还是分钟； 若长时间按住该键，还可使秒信号清零，用于精确调时； change： 接按键，手动调整时，每按一次，计数器加1； 如果长按，则连续快速加1，用于快速调时和定时； hour,min,sec：此三信号分别输出并显示时、分、秒信号， 皆采用BCD码计数，分别驱动6个数码管显示时间； alert： 输出到扬声器的信号，用于产生闹铃音和报时音； 闹铃音为持续20秒的急促的“嘀嘀嘀”音，若按住“change”键， 则可屏蔽该音；整点报时音为“嘀嘀嘀嘀—嘟”四短一长音； LD_alert： 接发光二极管，指示是否设置了闹钟功能； LD_hour： 接发光二极管，指示当前调整的是小时信号； LD_min： 接发光二极管，指示当前调整的是分钟信号。
Signal definition: clk: standard clock signal, in this case, the frequency of 4Hz clk_1k: generating an alarm sound, the sound of the chime of the clock signal, in this case a frequency of 1024Hz mode: function control signal to 0: timing functions 1: alarm clock function 2: Manual calibration function turn: take the keys, function in the manual when school choice is to adjust the hours, or minutes if long press the button, but also to second signal cleared for precise time-setting change: access key, manually adjust the time, every time you press, the counter is incremented if long press, then in quick succession by 1, when used to quickly tune and timing hour, min, sec: The three signals are output and display hours, minutes, seconds signal using BCD code are counted separately driven six digital tube display time alert: a signal output to the speaker for generating an alarm tone chime tone alarm tone sustained 20 seconds of rapid " Didi tick" sound, if the hol (2015-12-09, VHDL, 16KB, 下载2次)
设计一台能显示时、分、秒的数字电子钟，具体要求如下：
（1）时计数器用24进制计时电路，分、秒计数器用60进制计分、计秒电路；
（2）可手动校时，能分别进行时、分的校正；
（3）能实现整点报时功能。
Design a table can display hours, minutes and seconds of digital electronic clock, the specific requirements are as follows: (a) when the counter with 24 hexadecimal timing circuits, minutes, seconds counter with 60 decimal points, namely, second circuit (2) may be Manually school, be able to separate hours, minutes correction (3) to achieve the whole point timekeeping function. (2013-06-23, VHDL, 913KB, 下载3次)
用 Verilog HDL 设计一个多功能数字钟，包含以下主要功能：
1） 计时，时间以 24 小时制显示；
2） 校时；
3） 闹钟：设定闹钟时间，可利用 LED 闪烁作为闹钟提示；
4） 跑表：启动、停止；
5） 其他。
Using Verilog HDL design a multi-functional digital clock contains the following main functions: 1) time, the time is displayed in 24-hour clock 2) school 3) Alarm Clock: Set the alarm time, you can use the LED flashes as an alarm 4) Stopwatch: start, stop 5) Other. (2013-04-24, VHDL, 1206KB, 下载33次)
本数字钟可实现正常计时，支持12小时和24小时两种计时方式的切换，允许用户手动调时和整点报时功能。
系统对外向用户提供了两个按键:功能键和调整键.功能键用于功能选择,调整键用于相关的时间调整. 当接通电源后系统便开始正常计时，如果按一下功能键，则进入调小时模式,再按一次则进入调分模式,再按则进入12/24小时模式选择设定,再按则恢复到正常计时状态. 在正常计时状态下，用户可以选择12或24小时的计时方式，第六个数码管的右下方小点亮表示是12小时模式，不亮表示24小时。整点报时时，六个数码管的小点会同时亮。
当用户通过按键进入校时状态时，第二个数码管的小点变亮，表示现在在对小时进行设置；同样，进行校分状态时，第四个数码管的小点会亮，表示现在正在对分钟进行设置。
The digital clock can achieve normal timing, support for 12 hours and 24 hours two timing mode switch allows the user to manually tune and the whole hour. Systems external to provide users with two keys: the function key and adjust the key function keys for function selection and adjustment button for the relevant time to adjust the power system began timing, if you click a function key, adjust the hour mode, and then once for the tone patterns, and then enter 12/24 hour mode select Settings, and then restored to normal timekeeping. in normal time status, the user can select 12 or 24 hours timing sixth of the way, the bottom right of the small digital tube light 12 hour mode, light 24 hours. The whole point of time when the dot of six digital tube light. Button to enter the school when the second digital tube light, that now the hour set Similarly, when the school sub-state, the fourth digital control points will be bright, said that now are minute set. (2012-05-25, VHDL, 17KB, 下载3次)
此数字钟具有时，分，秒计时并显示功能；
2.能进行24/12小时制计时模块的切换；
3.具有校时，清除功能，能对时，分，秒进行调整；
4.具有整点报时功能：在59分51秒，59分53秒，59分55秒，59分57秒发出低音256HZ信号，在59分59秒发出一次高音1024HZ信号，音响持续一秒钟，在1024HZ音响结束时刻即为整点；
This digital clock with hours, minutes, seconds, chronograph and display 2 24/12 hour time capable of switching modules 3 with the school, clean up, can the hours, minutes, seconds to adjust 4 with The whole point timekeeping functions: in 59 minutes and 51 seconds, 59 minutes and 53 seconds, 59 minutes and 55 seconds, 59 minutes and 57 seconds bass 256HZ signal sent in 59 minutes and 59 seconds to issue a treble 1024HZ signals, sound for one second, sound in 1024HZ end time is the whole point (2011-11-13, VHDL, 703KB, 下载4次)
电子钟的设计，(1) 计时功能：这是本计时器设计的基本功能，可进行时、分、秒计时，并显示。
(2) 闹钟功能：如果当前时间与设置的闹钟时间相同，则扬声器发出一段音乐，并维持一分钟。
(3) 调时调分调闹钟功能：当需要校时或者要重新设置闹钟的时间时，可通过实验箱上的按键控制。
The design of electronic clock, (1) timer function: This is the basic design of the timer function, can be hours, minutes, seconds, time, and displayed. (2) Alarm function: If the current time and set the alarm clock the same time, the speaker issued a piece of music, and to maintain a minute. (3) adjusting the tone when the tone alarm sub-functions: the school or when when you need to re-set the alarm time, the experimental box through the keys on the control. (2010-11-30, VHDL, 82KB, 下载7次)
VerilogHDL编译基本功能具有“秒”、“分”、“时”计时功能，小时按24小时制计时。具有校时功能，能对“分”和“小时”进行调整。扩展功能
仿广播电台正点报时。在59分51秒、53秒、55秒、57秒发出低音512Hz信号，在59分59秒时发出一次高音1024Hz信号，音响持续1秒钟，在1024Hz音响结束时刻为整点。
定时控制，其时间自定；
可任意设定时间的闹钟
自动报整点小时数
小时显示：可切换12小时/24小时显示
VerilogHDL compile the basic functions of a " second" , " division" and " when" time function, hour by 24-hour time. When a school function, can " divide" and " hours" to adjust. Radio extension punctual timekeeping imitation. In 59 minutes and 51 seconds, 53 seconds, 55 seconds, 57 seconds sent the bass 512Hz signal, in 59 minutes and 59 seconds to issue a Treble 1024Hz signal, sound for 1 second, the end of the 1024Hz sound time for the whole point. Timing control, its time to custom can be arbitrarily set the time automatically report the whole point of the alarm clock an hour for several hours show: switchable 12 hours/24 hours display (2010-06-20, VHDL, 1KB, 下载5次)
具有“秒”、“分”、“时”计时功能，小时按24小时制计时。
具有校时功能，能够对“分”和“小时”进行调整。
具有整点报时功能。在59分51秒、53秒、55秒、57秒发出低音512Hz信号，在59分59秒时发出一次高音1024Hz信号，音响持续1秒钟，在1024Hz音响结束时刻为整点。
With "seconds", "minutes", "hour" timing function, hours at a 24-hour clock time. When a school function, be able to "minutes" and "hours" to adjust.With the whole point timekeeping function. In 59 minutes and 51 seconds, 53 seconds, 55 seconds, 57 seconds sent the bass 512Hz signal, in 59 minutes and 59 seconds to issue a Treble 1024Hz signal, Sound for 1 second, at 1024Hz audio end of the time for the whole point. (2010-01-25, VHDL, 330KB, 下载7次)
文通过ALTERA公司的quartus II软件，用Verilog HDL语言完成多功能数字钟的设计。主要完成的功能为：计时功能，24小时制计时显示；通过七段数码管动态显示时间；校时设置功能，可分别设置时、分、秒；跑表的启动、停止 、保持显示和清除。
Through the ALTERA company quartus II software, using Verilog HDL language to complete the design of multi-function digital clock. The main function of the completion are: time function, 24-hour time display through the Seven-Segment LED dynamic display time school settings function, can be set hours, minutes, seconds the stopwatch to start, stop, and maintain display and removal. (2008-12-11, VHDL, 178KB, 下载100次)