功能需求：
日期、时间、星期、按键校时、闹钟、温度测量、红外遥控校时。
人性化设计需求：
时间显示： 数码管(醒目)
星期显示：点阵(醒目+显示有限)
装饰： 来回流水灯
日期、温度和闹钟等辅助信息显示：液晶
近距离校时：按键
远距离遥控校时：红外遥控器
Functional requirements:
Date, time, week, when the school keys, alarm clock, temperature measurement, infrared remote control at school.
Humanized design requirements:
Time Display: Digital tube (striking)
Weekday: dot matrix (striking+ show limited)
Decorations: light water back and forth
Date, temperature and alarm clock, and other auxiliary information display: LCD
When you close the school: Key
When long-distance remote school: infrared remote control
(2014-07-02, Visual C++, 3KB, 下载2次)
基于c8051f020的寻迹智能小车的程序 校赛使用过
Based on c8051f020 intelligent tracing car used the program of the competition
(2014-05-18, C/C++, 3KB, 下载2次)
1．具有‘时’、‘分’、‘秒’、‘毫秒’的数码管十进制数字显示。
2. 具有手动校时、校分的功能。
3．具有定时与闹钟功能，能在设定的时间使LED灯亮光。
4．能进行整点报时。即从59分50秒起，每隔2秒钟绿色LED灯点亮一次，连续5次，最后一次红色LED灯点亮一次，表明到达整点。
5、具有秒表功能，能显示1 秒，手动停止。
6、具有倒计时功能，显示小时、分钟、秒。
1. With ' when' , ' points' , ' second' , ' ms' digital tube display decimal digits. (2) When a manual school, school of function. 3. With a timer and alarm clock function, can make the LED lights light at a set time. 4. Can carry the whole point timekeeping. Namely, from 59 minutes and 50 seconds, every 2 seconds the green LED lights up once, five consecutive times, the last time the red LED lights up, indicating that reaches the whole point. 5, with a stopwatch function that can display one percent second manually stopped. 6, with a countdown function, display of hours, minutes, seconds. (2014-03-10, VHDL, 2KB, 下载2次)
多功能电子时钟，配合普中科技的开发板，虽说普中很渣，但懒得搭电路了，在板子接线上稍有改动，参考了宋老师的书，可以显示时间，温度，可校时
The multifunctional electronic clock, with the development board of puzhong, though it is very weak, i am too lazy to take the circuit. There is a slight change in the board wiring. Referring to Mr. Song's book, it can show time, temperature and calibration time. (2017-12-11, WINDOWS, 108KB, 下载2次)
收音机源码，电子校时收音机，实现收音机功能，下载到PCB即可使用
Radio source, radio electronic school, realize radio, to PCB can be used to download (2016-06-26, Visual C++, 3331KB, 下载2次)
1．设计、安装、调试脉冲发生电路。
2．设计、安装、调试59′59″计时器电路。
3．设计、安装、调试译码显示电路。
4．设计、安装、调试任意状态清零电路。
5．设计、安装、调试快速校分电路。
6．设计、安装、调试整点报时电路（59′53″、59′55″、59′57″时发出频率为500Hz的低声；59′59″时发出频率为1KHz的高声）。
7．设计1－5项联接构成数字计时器电路
A digital clock in Multisim (2016-03-18, Others, 430KB, 下载2次)
CT107D平台开发电子钟C代码
有按键校时、整点报时等功能
When CT107D platform electronic clock C code is the key school, the whole point timekeeping functions (2016-01-14, C/C++, 1KB, 下载2次)
一共4个按键：确认/修改，移位，时间加，时间减
LCD1602界面说明：第一行为系统当前运行状态(两种)：
Runing-表示运行中不能设置任何参数
Timing-表示进入时间校时状态
第二行未当前时间显示与设置；
通过配合移位按键对应的时-分-秒进行闪烁指示，
再配合时间加/时间减进行参数校时；
A total of four buttons: confirm/modify, shift, time plus, time minus LCD1602 Interface Description: the first acts of the system is currently running (two kinds): Runing- indicates operation can not set any parameters Timing- that enter the school at the time state the second line is not the current time display and setting by corresponding with the shift keys- were flashes to indicate seconds, and then with time plus/minus time timing parameters- points (2015-05-28, C#, 96KB, 下载2次)
这是一个四位数码管的显示程序，具有数字钟基本的显示，校时等功能，很简单。
This is a four digital tube display program, with a basic digital clock display, school and other functions, is very simple. (2015-01-04, Visual C++, 1KB, 下载2次)
1、学习定时器T1溢出中断的使用
2、学习电脑时钟的编程方法
3、在程序运行时按SHIFT进行校时
使用注意：
1、应包含头文件slavr.h
2、在工程选项中的Additional Lib中填入slavr 使用编译器使用附加库文件
1, T1 timer overflow interrupt to learn the use of 2, to learn computer programming clock 3, the procedures for running the school by the use of SHIFT Note: 1, should include the header file slavr.h 2, in the project options Additional Lib fill slavr use the compiler to use the additional library file (2009-07-12, C/C++, 1KB, 下载2次)
是我在网上收集的一些单片机方面的经验之谈，看看后应该有帮助
歇效挟胁写泻协褬些携歇械袦袕袝肖胁袥邪袎袝袇笑袑袥褮袟袧校褑袝肖袨斜褖卸袔鞋袠袃袑袩袛袩袛袣褤谐袉袠校谐邪袗褟卸褮 (2008-08-07, C/C++, 61KB, 下载2次)
POJ2978，同样是状态DP好题，滑铁卢大学的校赛题目
POJ2978, state DP is also a good title, University of Waterloo s School Tour Title (2007-11-04, Visual C++, 1KB, 下载2次)
1参考电压需要足够精确,推荐使用外部高精准参考电压.
2如果PGA可调,增益系数一般是越小噪声越低.
3一般最好用到满量程,此时AD精度不浪费.
4如果有偏置,需要进行自校.
5请注意在使用DEMO板调试时,会由调试口导入PC噪声,由信号连接线导入外部噪声,因此建议使用屏蔽电缆传输信号.
A sufficiently accurate reference voltage needs to recommend the use of an external high-precision reference voltage. 2 If the PGA adjustable gain coefficient the smaller the noise is generally lower. 3 generally best to use full-scale, precision is not a waste of time AD. 4 If there is bias, since the need for school. 5 Please note that the use of DEMO board debugging, the debug port to import from PC noise, by the signal cable into the external noise, it is proposed the use of shielded cable transmission signal. (2009-05-01, Visual C++, 1KB, 下载1次)
这个是PCF8563，IIC接口的实时时钟芯片。代码经过本人测试，可以正常使用
This is PCF8563, IIC interface real-time clock chip. Code after I test, can normal use
(2014-09-01, C/C++, 48KB, 下载1次)
可以计时还可以显示秒表计时，通过外部键盘改变时间和切换模式。还可以自动校时。
It can display time and count time .you also can change time by keys.It show in a 1cd. (2013-11-16, Visual C++, 8KB, 下载1次)
可以计时还可以显示秒表计时，通过外部键盘改变时间和切换模式。还可以自动校时。
It can display time and count time .you also can change time by keys.It show in a 1cd. (2013-11-16, Visual C++, 2KB, 下载1次)
开发环境为Keil，基于89RC51单片机简单I/O口的应用，使用到定时器中断，独立键盘，是简单的时钟，具有暂停、校时、校分、整点闹铃的功能。
Development environment for the Keil, based 89RC51 simple microcontroller I/O port of the application, use the timer interrupt, separate keyboard, it is a simple clock, with pause, school, school hours, the whole point of the alarm function. (2013-10-21, Others, 12KB, 下载1次)
1、实时时钟——DS1302
时钟量由单片机送LED数码管显示。LED数码管的使用方法见上文。参考程序1实现预置时间，由软件编程输入当前时间初值，运行程序后LED显示当前时间。参考程序2用按键实现（年、月、日）、（时、分、秒）这两种状态的切换。参考程序3实现按键校时，一个按键可进入或退出设置状态，进入设置状态后，一个键切换所需修改的位，两个键对数字进行加减修改，按键退出设置状态后即返回显示状态。
A real-time clock- DS1302 clock amount sent by the microcontroller LED digital display. LED digital tube use, see above. Reference procedure to achieve a preset time, enter the current time from the initial software programming, run the program, the LED displays the current time. 2 Use the keys to achieve reference program (year, month, day), (hours, minutes, seconds) to switch the two states. Reference procedure 3 to achieve key school, a key to enter or exit the setting mode, enter setup mode, a button to switch the bits you want to modify, add or subtract two keys on the numeric modify button to exit the setup display status after return . (2013-07-16, Visual C++, 9KB, 下载1次)
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。
If long press, the continuous rapid plus 1 for quick adjustment and timing,
Hour-by-hour, min, SEC: this three signal output and display when respectively, minutes and seconds signal,
All USES BCD counter, respectively driven six digital pipe display time,
Where the signal to the speaker: output, used to produce make primitive and strike the sound,
Make businessis about for lasts 20 seconds the urgent "di di di" sound, if hold "information" key,
Then can shield the sound, Integral point to announce the sound as "di di di di- du" four short a drawl,
LD_alert: connect the light emitting diode, instruction set the alarm clock function whether
LD_hour: connect the light emitting diode, instructions, the current is to adjust the hour signal,
LD_min: connect the light emitting diode, instructions, the current is to adjust the minutes signal. (2011-03-04, Others, 2KB, 下载1次)
应用8031单片机控制的数字时钟上，在设计上采用硬件计数与软件计数相结合的方式，并且定时器T0采用了中断方式，优先级最高。然后通过开关的闭合与关断来控制闹钟的校时，整点报时等功能。
Application of 8031 controlled digital clock, counting in the design of hardware and software using a combination of counts and using the timer interrupt T0, the highest priority. Then closed through the switch to control the clock and off the school, the whole point of time and other functions. (2010-12-14, VHDL, 862KB, 下载1次)