实验8 模拟音乐-八月桂花

AD9851驱动程序，采用串行写入方式，STM32写入频率控制字。(AD9851 driver, using serial write mode, STM32 write frequency control word.)

用整数存储私有成员：年、月和日。为类提供构造函数，能够对各成员进行初始 化，但出现错误的初值时, 成员为2000-1-。也可以不在不提供任何初值的情况 下日期为2000-1-1。另外可以用一个Date 对象进行初始化，成员函数应实现以 下功能： （1） 对所有成员一次性赋值，也能对某个成员单独赋值，能够一次返回所有成 员的值，也能单独返回某个成员的值 （2） 可以按照mm-dd-yyyy 格式输出日期。 （3） 有成员函数nextDay（），用于将日期增加一天(Integer stored the private Members: year, month, and day. Class provides a constructor to initialize the members, but the wrong initial value, members 2000-1-. The date can also be not the case does not provide any initial value 2000-1-1. Also available on a Date object is initialized, the member function should achieve the following functions: (1) all members of the one-time assignment, can also be a member of a separate assignment, to return once the value of all the members, but also separate return a The members of the value (2) according to the date of mm-dd-yyyy format output. (3) member function nextDay () for additional day date)

安卓摇一摇案例，安卓传感器的学习模版，值得学习(Andrews shake case study template Andrews sensor, it is worth learning)

Interfacing LED Dot Matrix with 8051 Microcontroller

说明：  使用128AVR单片机测量三相电的电压，电流，频率等数据并通过12864显示屏进行实时显示(Using 128AVR MCU to measure the voltage, current and frequency of three-phase electricity and display them in real time through 12864 display screen.)

说明：  在此基础上，设计一种温度测量系统，能够检测温度，并通过按键调整温度的上下限值，若超过该限值，进行报警提示。该系统的硬件子电路主要用Protues仿真软件实现，具体的子电路包括：恒流源电路（TLC2543芯片）、信号放大调理电路（两线制铂电阻PT100）、单片机最小系统（AT89C51）、A/D转换电路、按键电路、显示电路、声光报警器等。该系统的软件电路以C语言为基础，在Keil中实现。最后通过软硬结合，实现电路的各种情况仿真，以此验证电路设计的正确性和合理性。(On this basis, a temperature measurement system is designed, which can detect the temperature and adjust the upper and lower limits of the temperature by pressing the key. If it exceeds the limit, an alarm will be given. The hardware sub circuit of the system is mainly realized by Proteus simulation software. The specific sub circuits include: constant current source circuit (TLC2543 chip), signal amplification and conditioning circuit (two-wire platinum resistance PT100), minimum system of single chip microcomputer (AT89C51), a / D conversion circuit, key circuit, display circuit, sound and light alarm, etc. The software circuit of the system is based on C language and implemented in keil. Finally, through the combination of hardware and software, the circuit simulation is realized to verify the correctness and rationality of the circuit design.)

利用c++编写的任意波形发生器的人机界面,通过并口和下位机相连()

stm32f4范例，双ADC同时采样，通过DMA的双buffer模式传送，希望对初学者有帮助。范例完整，可直接在stm32f4dis上运行，环境nvision5(example for stm32f4dis,used to describe how to set double ADCs sampling simultaneous ,and send the data through the DMA Double buffer mode )

基于AD9854的DDS外围电路设计和程序(The AD9854 DDS based peripheral circuit design and procedures)

RS485和232的转换电路 带隔离的转换电路 RS485和232的转换电路 带隔离的转换电路(RS485 and 232 exchange cercuit with isolated RS485 and 232 exchange cercuit with isolated)