51控制led顺序点亮, 通过控制p0.0使其能按不同的顺序

汇编语言程序设计，显示系统时间。 首先在数据段开辟一显示缓冲区，用来存储系统时间。调用BIOS中断，返回系统时间，并将来返回的二进制时间转换成ASCII码，方便时间显示时的调用。分别将来小时数、分钟数、秒数存入显示缓冲区。通过写显存将时间显示出来。由于获取了的系统时间不会自动刷新，所以我们要设计成刷新的方式来不断获取系统的时间，这样就形成了会跳动的电子钟了。-Assembly language programming, display system time. First of all, open up one paragraph in the data display buffer for the storage system time. BIOS interrupt calls to return system time, and the future return of the binary time into ASCII code for the call time is displayed. Respectively, the future number of hours, minutes, seconds into the display buffer. Time by writing to memory will be displayed. As the access to the system time does not automatically refresh, so we need to refresh the way designed to keep on getting the system time, so that will be formed beating electronic o

基于单片机控制的电子密码锁 摘要：本系统由单片机系统、矩阵键盘、LED显示和报警系统组成。系统能完成开锁、超时报警、超次锁定、管理员解密、修改用户密码基本的密码锁的功能。除上述基本的密码锁功能外，还具有调电存储、声光提示等功能，依据实际的情况还可以添加遥控功 -Based on MCU-controlled electronic code locks Abstract: This system consists of single-chip microcomputer system, matrix keyboard, LED display and alarm system. System to complete the unlock, overtime alarm, lock超次, administrators decrypt, modify the user s password locks the basic functions. In addition to the above basic code lock function, but also has a transfer electric storage, sound and light features such as tips, according to the actual situation can also add a remote control reactive

计时程序,对8253进行分频,使用二个计数器,使第二个计数器的OUT作为中断源,送到8259产生中断,在LED上显示时间-time procedures for the 8,253-frequency, the use of two counters, so that a second counter OUT interrupted as a source to have interrupted 8259, the time shown on the LED

无刷直流电机的SPWM程序,可以用来实现变频的作用-Brushless DC motor SPWM procedures, can be used to realize the role of frequency

内含十几个已编译成功的c代码，欢迎大家共享。-intron 10 has several successful c compiler code, we are happy to share.

将一个无序数组排为升序数组或降序数组，且不丢失原来数据。-A disorderly array of row arrays for ascending or descending array, without loss of the original data.

RPR200测电机转速，相应值由3位LED动态显示-RPR200 measuring motor speed, the corresponding value from the three LED dynamic display

本程序实现系统时间查看.-system to examine.

很好的哈达风景画 安定方法打发似的发达 安定反对发疯士大夫大 按时打发-very good

全国二级c语言公共基础知识总结，由专业培训机构的专业老师编写，包含了近几年来的二级考试公共基础知识点，分点总结，结合每年题型，非常全面，专业，实用。