三种图案霓虹灯控制器课程设计说明书

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1、学 号： 0121111360727课 程 设 计题 目三种图案霓虹灯控制器学 院自动化专 业自动化班 级1104姓 名傅晓通指导教师林伟 杨莉2013年7月5日课程设计任务书学生姓名：傅晓通 专业班级：1104指导教师：林伟 杨莉 工作单位：自动化1104题 目: 三种图案霓虹灯控制器设计 初始条件：1 运用所学的模拟电路和数字电路等知识；2 用到的元件：实验板、电源、连接导线、74系列芯片、555芯片等。要求完成的主要任务:1 现有4只彩灯，红绿蓝黄，试设计控制器，要求彩灯能实现如下追逐图案，彩灯控制器的三种图案及其状态转换如下所示：2 摇摆状态01011010，重复6次。3 暗点循环01

2、111011110111100111这样重复循环3次。4 逐个点亮，逐个熄灭，000010001100111011110111001100010000这样重复循环2次。5 霓虹灯控制工作状态按照上述2至4步自动重复循环。时间间隔为1秒。6 严格按照课程设计说明书要求撰写课程设计说明书。时间安排： 第1天 下达课程设计任务书，根据任务书查找资料；第24天 进行方案论证，软件模拟仿真并确定设计方案； 第5天 提交电路图，经审查后领取元器件；第68天 组装电路并调试，检查错误并提出问题；第911天 结果分析整理，撰写课程设计报告，验收调试结果；第1214天 补充完成课程设计报告和答辩。指导教师签名：

3、 2011年 6月26日系主任（或责任教师）签名： 2011年 6月26日目录引言 11. 设计意义及要求 21.1 设计意义 21.2 设计要求 .22. 方案设计32.1 系统方案 32.11 方案思路 .32.2 具体方案. 42.21 个人方案：单片机编码法和移位法 42.22 小组方案：门电路法 52.3 方案比较 .93. 部分电路及程序设计 93.1部分电路说明 .93.2 部分程序设计 103.2.1 摇摆图案单元 .103.22 暗点循环单元 .113.2.3 逐个点亮逐个熄灭单元 113.2.4 时间间隔单元 124 .调试与检测 135. 仿真操作步骤及使用说明 14结束

4、语 15参考文献 16附录 17本科生课程设计成绩评定表 20武汉理工大学电工电子综合课程设计说明书引言电工电子课程设计是一项极为锻炼学生动手能力和课本知识迁移能力的学生自主设计实践活动。课程设计为学生提供了设计命题，让学生以学过的知识为基础进行设计和仿真、答辩，最后形成设计成果。在本次课程设计中，学生通过自由分组的方式，组成一个设计小组，并从提供的设计题目中选择其中之一或者发挥自己的创造力，自行拟定设计课题，个人思考设计，完成一套个人设计方案，并通过Protues完成仿真、调试，同时小组成员互相互学习，相互讨论，集思广益，形成并优化出一套小组方案，并通过Protues完成仿真，最后进行答辩、

5、验收，形成最终的设计成果，意在过程中激发学生的设计创想，学会迁移课本知识，培养细致耐心谨慎的品质，学会团队合作与优化方案，巩固知识与能力，同时在创新和动手能力上力求达到一个新的高度。1. 设计意义及要求1.1 设计意义本次设计旨在帮助学生进一步巩固书本所学的模拟电路和数字电路知识，促使其学会分析设计命题，自主思考，独立设计个人方案，并交流合作形成小组方案，以达到强化知识，训练思维，激发创造力，提高实践动手能力的目的。三种图案霓虹灯控制器属于基础的一种自动控制电路组合，成型后将形成以三种图案循环变换的闪烁图案，可以广泛用于各种舞会装饰、商店装修以及活动现场装扮等场合，用途广泛，设计难度适中，具有

6、较强的操作性。1.2 设计要求1）用4只红绿蓝黄的彩灯设计控制器，要求彩灯能实现如下追逐图案，彩灯控制器的三种图案及其状态转换如下所示：1）摇摆状态01011010，重复6次；2）暗点循环01111011110111100111这样重复循环3次；3）逐个点亮，逐个熄灭，000010001100111011110111001100010000这样重复循环2次；4）霓虹灯控制工作状态按照上述2至4步自动重复循环。时间间隔为1秒。2）自主设计，并进行方案论证和软件模拟仿真，并讨论形成小组方案；3）提交电路图，经审查后领取元器件；4）组装电路并调试，检查错误并提出问题；5）进行结果分析和整理，严格按照

7、课程设计说明书要求撰写课程设计报告，验收调试结果；6）补充完成课程设计报告和答辩。2. 方案设计2.1 系统方案2.11 方案思路系统框图如图2-11所示，本设计以控制电路为核心，以四个颜色分为红、黄、蓝、绿的LED灯作为工作部分，预期当输出为低电平0时使LED灯处于熄灭状态，当输出为高电平1时使LED灯为点亮状态，通过设置控制部分的电路，采取如单片机或者门电路、集成芯片等器件组成控制三种亮暗图案循环变换的控制电路，其控制方式以输出1010、0101或0001等电平组合的形式来实现。设计的关键在于控制部分，具体电路由具体方案的选择决定，采用单片机控制则控制部分主要为单片机及其最小电路，若选用数

8、电门电路，则控制部分主要有74系列集成芯片和555定时器芯片构成，其控制核心都在于构建控制电路，使得连接四个LED工作灯的输出端能够持续循环地按照要求输出0、1的高低电平，以实现设计要求中的三种图案显示。考虑到个人方案设计中器件限制较少，加之为了简化电路，因此个人方案选用单片机控制电路来实现设计要求，采用51系列单片机及其最小应用系统组成其核心控制部分；而对于小组方案，则采用74LS90，74LS193,74LS154,74LS08，74L139集成芯片和逻辑门共同组成电路的控制部分。电源部分控制部分工作部分图2-11系统框图2.2 具体方案2.21 个人方案：单片机编码法和移位法1.原理说明

9、：分析设计命题中的三个要求：1)摇摆状态01011010，重复6次；2)暗点循环01111011110111100111这样重复循环3次；3)逐个点亮，逐个熄灭，000000010011011111111110110010000000这样重复循环2次；4)霓虹灯控制工作状态按照上述2至4步自动重复循环。时间间隔为1秒。本设计中选用的微处理芯片是STC89C52它是一种低功耗、高性能CMOS8位微控制器，具有8K 在系统可编程Flash 存储器。在单芯片上，拥有灵巧的8 位CPU 和在系统可编程Flash，使得STC89C52为众多嵌入式控制应用系统提供高灵活、超有效的解决方案。具有以下标准功能

10、：8k字节Flash，512字节RAM，32 位I/O 口线，看门狗定时器，内置4KB EEPROM，MAX810复位电路，2个16 位定时器/计数器，一个6向量2级中断结构，全双工串行口。另外STC89X52 可降至0Hz 静态逻辑操作，支持2种软件可选择节电模式。空闲模式下，CPU 停止工作，允许RAM、定时器/计数器、串口、中断继续工作。掉电保护方式下，RAM内容被保存，振荡器被冻结，单片机一切工作停止，直到下一个中断或硬件复位为止。最高运作频率35MHz，6T/12T可选。51单片机P0口内部没有上拉电阻，为高阻态，所以不能正常地输出高/低电平，因此该组I/O口在使用时务必要外加上拉电

11、阻。从0和1表示的LED亮暗状态中我们可以发现第一个图案摇摆状态可以看作是0101和1010的重复转换，鉴于单片机P0口地址为8位，所以看做是00000101和00001010的转换，每次转换一次，整个状态重复六次；对于第二个状态，则看作是00000111,00001011,000001101，00001110的循环转换，每次装换一次，整个状态重复三次；第三个状态则看作00001111的循环左移，每次移动一位，整个状态重复两次。 对于各个图案的循环我们通过for(;)循环控制，对于整个大循环则通过while(1)循环实现。针对每一步的延迟秒，以及灯变化的人眼分辨时间则通过执行一个timems(

12、int)来实现，编程过程中我们通过调试timems(int)部分的程序，以达到人眼能清楚分辨LED灯的明暗变化和各个图案转换之间的秒间隔的要求。编程后经检查无误，编译生成一个hex文件，导入到protues里的单片机进行仿真检验。2.单片机设计电路原理图图1 单片机设计电路图2.22 小组方案：门电路法1.门电路法原理说明：对于设计要求的图案，摇摆图案（01011010）采用具有数据选择功能的74LS151芯片和双时钟4位二进制同步可逆计数器74LS193来实现；对于第二种暗点循环图案（01111011110111100111），采用二进制译码器74LS139和双时钟4位二进制同步可逆计数器7

13、4LS193来实现；而对于第三种逐个点亮和逐个熄灭的图案（000010001100111011110111001100010000）则采用具有移位寄存功能的74LS199芯片来实现；对于循环次数的要求则是通过74LS193和74LS194芯片实现；而图案转换间的1秒间隔则采用555定时器构成的单稳态触发器来实现；整个系统使用的时钟脉冲则通过555定时器构成的多谐振荡器来实现。2.门电路法电路原理图：图2门电路法电路原理图3.部分芯片原理图74LS151为互补输出的8选1数据选择器，引脚排列如图所示：图3 74LS151引脚图选择控制端（地址端）为CA，按二进制译码，从8个输入数据D0D7中，选

14、择一个需要的数据送到输出端Y，G为使能端，低电平有效。 （1）使能端G1时，不论CA状态如何，均无输出（Y0，W1），多路开关被禁止。838电子 （2）使能端G0时，多路开关正常工作，根据地址码C、B、A的状态选择D0D7中某一个通道的数据输送到输出端Y。 如：CBA000，则选择D0数据到输出端，即YD0。新艺图库 如：CBA001，则选择D1数据到输出端,即YD1，其余类推。74LS151功能表:表1 74LS151功能表4LS139 为两个2线4 线译码器，共有 54/74S139和 54/74LS139 两种线路结构型式，当选通端（G1）为低电平，可将地址端（A、B）的二进制编码在一个

15、对应的输出端以低电平译出。 若将选通端（G1）作为数据输入端时，139 还可作数据分配器。74LS139的逻辑功能表如表2所示，引脚图如图8所示：表2 74LS139逻辑功能表 图3 74LS139引脚图及逻辑图74LS199的逻辑功能表如下表所示：表3 74LS199逻辑功能表2.3 方案比较经过仿真验证，个人与小组两种方案都能很好的实现三种霓虹灯图案的控制，各有各的优缺点，对于个人方案即单片机控制的移位法和编码法，器件线路简单，连接方便，只需搭建单片机最小电路，编写控制程序并导入即可实现，调试与改善电路都较为方便，方法也更为智能化，但是考虑到若将此设计应用于批量生产与应用，则单片机成本较为

16、昂贵，而且颇有大材小用的味道；而对于小组的门电路法，采用74LS系列集成芯片、555定时器和一些逻辑门电路搭建，成本较低，有利于设计的批量生产和应用推广，但是由于芯片较多，线路较为复杂，所以存在着连接、检查、调试与改善电路时较为繁琐的缺点，同时占用空间也较大，导致成品内部结构较为复杂。3. 部分电路及程序设计3.1部分电路说明1）按键复位按键复位就是在复位电容上并联一个开关，当开关按下时电容被放电、RST也被拉到高电平，而且由于电容的充电，会保持一段时间的高电平来使单片机复位。电路图如图2.1图2.1 按键复位电路2）振荡电路单片机系统里都有晶振，在单片机系统里晶振作用非常大，全称叫晶体振荡器

17、，它结合单片机内部电路产生单片机所需的时钟频率，单片机晶振提供的时钟频率越高，那么单片机运行速度就越快，单片接的一切指令的执行都是建立在单片机晶振提供的时钟频率。在通常工作条件下，普通的晶振频率绝对精度可达百万分之五十。高级的精度更高。有些晶振还可以由外加电压在一定范围内调整频率，称为压控振荡器（VCO）。晶振用一种能把电能和机械能相互转化的晶体在共振的状态下工作，以提供稳定，精确的单频振荡。单片机晶振的作用是为系统提供基本的时钟信号。通常一个系统共用一个晶振，便于各部分保持同步。有些通讯系统的基频和射频使用不同的晶振，而通过电子调整频率的方法保持同步。 晶振通常与锁相环电路配合使用，以提供系

18、统所需的时钟频率。如果不同子系统需要不同频率的时钟信号，可以用与同一个晶振相连的不同锁相环来提供。 STC89C51使用11.0592MHz的晶体振荡器作为振荡源，由于单片机内部带有振荡电路，所以外部只要连接一个晶振和两个电容即可，电容容量一般在15pF至50pF之间。其电路原理图如2.2所示。图2.2 晶体振荡电路3.2 部分程序设计3.2.1 摇摆图案单元为了实现摇摆图案（01011010），且重复循环六次，作如下编程：for(i=6;i0;i-) /摇摆状态6次循环P0=0x05; /P0口低四位按0101显示delay(1000); /延时1sP0=0x0a; /1010delay(1

19、000); /延时1s其中for循环用以实现六次重复， 每次循环编码输出改变，从00000101经过一秒变为00001010，LED得到高电平发光，从而实现摇摆图案。 3.22 暗点循环单元为了实现暗点循环图案（01111011110111100111），作如下编程：for(i=3;i0;i-)P0=0x07; /0111delay(1000);P0=0x0b; /1011delay(1000);P0=0x0d; /1101delay(1000);P0=0x0e; /1110delay(1000); 其中for循环是用于实现三次图案的循环，四个赋值语句P0=0x07，P0=0x0b，P0=0x

20、0d，P0=0x0e，以及dalay语句以实现暗点循环图案，而delay（）程序则是为了产生人眼分辨灯工作状态变换的时间间隔。3.2.3 逐个点亮逐个熄灭单元为了实现逐个点亮和逐个熄灭图案（000010001100111011110111001100010000）做如下编程：for(i=2;i0;i-)for(j=8;j0;j-)P0=a; /令P0各I/O口为00001111初始状态delay(1000);a=_crol_(a,1); /每次循环左移一位同理的，赋值语句P0=a和_ a=_crol_(a,1)语句用以实现000000000000000100000011000001110000

21、111100011110001111000111100011110000的数码循环，及所需要的图案，for循环同样用于实现图案的两次重复，delay（）用于时间间隔。3.2.4 时间间隔单元为了实现图案转换间的1秒时间间隔以及LED灯工作状态变换的人眼识别时间编写如下的timems程序：void delay(uint z)/延迟z毫秒uint i,j;for(i=z;i0;i-)for(j=110;j0;j-);通过设置空执行的循环语句，以单片机自身运行时间为基础，编程调试出所需要的时间间隔。4 .调试与检测调试中故障及解决办法遇到的问题：（1）在运行时发现图案的变换与所设想的完全相反；（2）

22、LED灯一直不亮；解决的办法：（1）正确连接高低位，红灯对应0接口，绿灯对应P0.0接口；（2）使用P0口输出时要外加上拉电阻，否则输出都为高阻态；5. 仿真操作步骤及使用说明打开对应的protues文件，查看是否将先前编辑好的hex文件导入单片机中，并检查元件之间的关联路径是否正确，线路之间有没有短路点。检查无误后，点击启动按钮进行仿真，可以观察到三种霓虹灯图案的变换。摇摆状态01011010，重复6次后，进行暗点循环01111011110111100111，重复循环3次后，进行逐个点点亮和熄灭，000000000000000100000011000001110000111100011110

23、001111000111100011110000，这样循环2次后，再进行摇摆状态，达成设计目标。结束语单片机作为我们的主要专业课之一，虽然在大二学年我对这门课并没有什么兴趣，觉得那些程序枯燥乏味，但在这次课程设计后我发现自己在一点一滴的努力中对单片机的兴趣也在逐渐增加。这次单片机课程设计我们历时两个星期，在我们班里算是倒数几组完成的吧，但经过这两个星期的实践和体验下来，我们又怎么会去在乎那个先后问题呢，因为对我来说学到的不仅是那些知识，更多的是团队和合作。现在想来，也许学校安排的课程设计有着它更深层的意义吧，它不仅仅让我们综合那些理论知识来运用到设计和创新，还让我们知道了一个团队凝聚在一起时所

24、能发挥出的巨大潜能。在做本次课程设计的过程中，我感触最深的当属查阅大量的设计资料了。为了让自己的设计更加完善，查阅这方面的设计资料是十分必要的，同时也是必不可少的。我们是在做单片机课程设计，但我们不是艺术家，他们可以抛开实际尽情在幻想的世界里翱翔，而我们一切都要有据可依，有理可寻，不切实际的构想永远只能是构想，永远无法升级为设计。作为一名自动化专业的大二学生，我觉得做单片机课程设计是十分有意义的，而且是十分必要的。在已度过的大学时间里，我们大多数接触的是专业课。我们在课堂上掌握的仅仅是专业课的理论知识，如何去锻炼我们的实践能力？如何把我们所学的专业基础课理论知识运用到实践中去呢？我想做类似的课

25、程设计就为我们提供了良好的实践平台。参考文献1郭天祥.51单片机C语言教程.电子工业出版社,20082Atmel Microcontriller Handbook ,20063伍时和数字电子技术基础清华大学出版社，20084谭浩强，C语言设计（第四版），清华大学出版社，2010附录个人方案移位法源程序：#include#include #include #define uchar unsigned char#define uint unsigned intvoid delay(uint z)/延迟z毫秒uint i,j;for(i=z;i0;i-)for(j=110;j0;j-);int ma

26、in()uint i,j,a=0xf0;while(1) /主循环for(i=6;i0;i-) /摇摆状态6次循环P0=0x05; /P0口低四位按0101显示delay(1000); /延时1sP0=0x0a; /1010delay(1000); /延时1sfor(i=3;i0;i-)P0=0x07; /0111delay(1000);P0=0x0b; /1011delay(1000);P0=0x0d; /1101delay(1000);P0=0x0e; /1110delay(1000); for(i=2;i0;i-)for(j=8;j0;j-)P0=a; /令P0各I/O口为0000111

27、1初始状态delay(1000);a=_crol_(a,1); /每次循环左移一位个人方案电路图：小组方案电路图：127（英文版 ） easily blame, to prevent the broken window effect. Supervise the leading cadres to play an exemplary role, take the lead in the strict implementation of the and , lead to safeguard the solemnity and authority of the party discipline,

28、 ensure that the party discipline and the laws and regulations for implementation in place. Throughout the discipline in the daily supervision and management, strengthen supervision and inspection, from the thorough investigation of violations of discipline behavior. Strengthen to key areas, key dep

29、artments and key projects as well as the masses reflect the concentration of the units and departments for supervision. - strengthening supervision, discipline inspection and supervision of cadres to set an example for compliance with the and is a man must be hexyl, blacksmith needs its own hardware

30、. Discipline inspection organs as the executor of the party discipline, and supervisor of the defenders, for its supervision must be more strictly, discipline inspection and supervision of cadres to firmly establish the awareness of Party Constitution, sense of discipline and rules consciousness, po

31、litics loyalty, sense obey. Action speak Ji Ordinance to set an example of the regulations of the rule of law, strengthen supervision and accept the supervision of the firmness and consciousness, do comply with and . To firmly establish the discipline must first be disciplined, the supervisor will b

32、e subject to the supervision of concept, and consciously safeguard and implement party compasses party, take the lead in practicing three strict real strict, so loyal, clean, play. To be good at learning, the Constitution and the as morality, politics and brought to fruition; to implement , do not w

33、ant to, dare not, not with disciplinary ruler to supervision; to discipline a ruler, often the control inspection, and consciously in the ideological red line to draw the row Ming Good accumulation is indeed the bottom line, so that the heart has fear, said to have quit, the line has ended. Attached

34、: indifferent to heart, calmly to the table in our life, there are many unpredictable things will happen, some good, some bad things, we cannot control is powerless to stop, but with time, you will find in life sometimes turns out to be not good, some bad things finally turned out to be a good thing

35、, but then we muddy however did not know, this is the life teach us things. 1, life can be complex, can also be simple. Want simple life of precipitation, to have enough time to reflect, to make Become more perfect. Life is the most important thing is not to win, but the struggle; not to have conque

36、red, but to have fought well. 2, the plain is the background of life. Live a plain life, give up on themselves is not a coward, but the wise answers; not disillusioned after the heart, such as ashes, but experience the storm after the enlightenment; not unrewarding perfunctorily, but calm attitude o

37、f life of unrestrained self-confidence. Plain living, there is no noise noisy, no earthly troubles, more did not fill in the discontent of desire, some just a calm, a calm. 3, memory of heart will not good things to erase the, life is a When no movie, pain is a beginning, the struggle is a kind of p

38、rocess, death is a kind of ending. Give up this giving up is the helpless, do not give up the abandoned, do not give up this giving up is ignorance, do not give up should not give up is persistent. 4, a thing figured is heaven, think impassability is hell. Since the living, to live better. Sometimes

39、 we because of too narrow-minded, too care around the chores and penny wise and pound foolish, not worth the candle. Some things to attract trouble and worry, completely depends on how we look at and deal with it. Dont always take everything back to things, and dont get into a blind alley, dont want

40、 to face, dont be narrow-minded. Poke to care, is a kind of open-minded, a free and easy. 5, I am not afraid of others behind me a knife, I afraid to look back and see stab me, is my intention to treat people; I am not afraid of the truth to tell the best friend, Im afraid he turned to it as a joke

41、to tell dont 6, when we are in a positive frame of mind, you will find many good things; and when we are in a negative state of mind, you will find many depressed things; life happy and worry, all is you of life attitude, optimistic, good luck; loss of sink, Eritrea company. When you are in adversit

42、y, may wish to change a point of view to think everything over to the good Think, because good mentality decided the fate of the! 7, people are tired, rest; heart tired, calm. Grow up, mature, this society read. Tired and sad, squat down, to their a hug. Because the world no one can sympathize with

43、you, have mercy on you. You cry, tears is your own; you pain, no one can understand. Then you only tears to smile. 8, each people have youth,Each youth are a story, the life of the world never gets easier, I want what, wish the world all know, as has been the same; now want anything, for fear that o

44、thers know, or like to lose the same. 9, the heart move, everything in the world is followed by birth, Rangrang, important thing is often the most difficult to open ones mouth, because words will reduce its importance; to let strangers people care about your life in the good things, the original is

45、not easy 10, do not blame, do not laugh at who, also dont envy who. Like a person is a kind of feeling, not like a person is true. The truth is easy to explain, I feel Is unspeakable. The best travel life is that you in a strange place found a long lost touched. 11, happy life not in the bustling in

46、, and in the peace of mind; no matter how many grievances, how uncomfortable, and ultimately to heal themselves or their own, others may got you to comfort, but never know your heart is how wanjianchuanxin. 12, maam, like a movie, learn to appreciate, learn to be grateful, learn tolerance, and goodn

47、ess, helping others. Instead of accusing the society, as into one; and an exception is better to give than to what 13, dont envy him A sum of, dont lose your life and the life, respectively is: the former is a we experienced cannot escape in a day finally will last minute, while the latter is our pe

48、rsistent, we want to cherish the memory of those people and things. 14, learn to smile, learn to strong, the world you know so many people, so many people and you are, you cannot change also cant let everyone like you, so also do not want to do. Life is too short to go crazy to love to go to waste,

49、to chase the dream to regret. 15, when temper, a blessing to go. A wounding elegant people, the key is to control their own emotions. With the mouth is the most stupid behavior. A control negative emotions than a can take a city more powerful water flow slow, language is expensive. People spent two

50、years of time to learn to speak, but to spend a few years time to shut up. That is a kind of ability, that is a kind of wisdom. 16, life is not perfect, sometimes, growth is not a cry, not an eyeful of tears, there is no trace of emotion, there is no gleam of hope, no desire, no action, no static, t

51、here is only one kind of downward sinking feeling, sink A murky? 6? 7? 6? 7 sink? 6? 7? 6? 7 toward the bottom of the sink. 17, in some way, do not go, you will not know the other side scenery is beautiful. To you is not good, you do not mind too much, no one has an obligation to you; you learn know

52、ledge, is you have weapons, you can start from scratch, but not unarmed; how do you treat people, does not represent how others treat you, if cannot see through this point, only inviting worry. 18, time is like a sponge in the water, as long as you are willing to squeeze, the total water is still th

53、ere. Every life, after the ups and downs The best test of live, to life, survival and continuation, do not stop the struggle in the joys and sorrows of life on the road, so that different soul to bear life beat, acceptance of suffering. 19, indifferent to heart, calmly in table, elegant and comforta

54、ble life, do not take what is so important. The pursuit will be disappointed; to be alive, you will have trouble. Life is the most afraid of what all want to care about, but also what all grasp is not firm, without scenery, separated populations, such as not to desire, all docked in the fate of the

55、end. Why is too rigid, the natural, to go stay not to live, let go of obsession, revel is 20, if the fate of the broken Hopes of sailing, please dont despair, the coast is still, if the fate of the withered petals of the beautiful, please do not sink, the spring is still, life will always be endless

56、 trouble, please dont helpless, because they are still alive, is still a dream, the sun still, we still. Lost, keep memories; to get, must work to; but the most important is good to cherish their own. 21, life, select the complex, is to choose the pain; choose a simple, is choose to be happy. The co

57、mplex world like aSignificance of pride. Hope is the ornate palace, outside people admiring the magnificent, living in the deep knowledge of living it to pay the price. Simple world as a simple log cabin outside ridiculed shabby, the heart is willing to go live to know the joy. Suffering and joy is

58、their own choice. 22, learn how to use a single powerful heart, let the past be the past, let the future come. Life is really the end of the end of an eagle is flying wings, life is constantly pursuit. Dont miss to regret, dont wait for old just miss. Time to return, seize every moment, again painst

59、akingly again tired also Those struggling to fly. 23, life could not Yimapingchuan, even flat pavement, inevitably there will be a few pieces of roadblocks. Some of the rocks around the past, while others have to move it out. Just move others put the stone is very easy, because the stone from the appearance we can discern; difficult to m