超声波测距LC1602显示

STC15F104E+DS18B20温度计2位数码管显示(STC15F104E+DS18B20Thermometer 2 digital display )

自己用51写的智能台灯项目，包含自动手动调节亮度，语音模块程序，自动光强检测控制led开启和关闭等(I used to write intelligent lamp 51 projects, including automatic and manual brightness adjustment, voice module program, automatic light intensity control led detect the opening and closing, etc.)

凌阳GPC系列,24个按键,3个模式,每按一个按键播放一段语音,模式3播的时候琴键播放Melody(Sunplus GPC Series, 24 keys, 3 mode, each press of a button play a voice, when the broadcast mode 3 keyboard player Melody)

说明：  下面的程序利用友元函数求两点间的距离。请你将有关的程序补充完整，并总结为什么这里要用友元函数来求两点间的距离。(using friend to get the result.)

该代码实现了IIC对24C02的读写，写采用页写的方式，读采用随机的方式。(This code implements the IIC on 24C02 read and write, write, write using the page mode, read random way.)

52单片机PWM（直流电机c语言源码(52 single chip PWM (DC motor) routine)

TM7711 是应用于电子秤低频测量的单通道模拟前端。 该器件可以接受直接来自传感器的低电平的 输入信号，然后产生串行的数字输出。利用 Σ-Δ 转换技术实现了 24 位无丢失代码性能。通过选定的输 入信号被送到一个基于模拟调制器的增益可编程专用前端。 片内数字滤波器处理调制器的输出信号， 通 过通信口发命令可调节滤波器的截止点和输出更新速率，从而对数字滤波器的第一个陷波进行编程。 TM7711 只需 2.6~5.5V 单电源供电。TM7711 是全差分模拟输入，带有一个基准输入。 TM7711 是一款用于高精度电子秤系统的理想产品，由于采用特殊的结构确保器件具有极低功耗， 并且内建有掉电模式以减少待机功耗。该芯片还具有集成度高、响应速度快、抗干扰强等优点，可以大 大降低电子秤系统的整机成本，提高整机系统的性能和可靠性。(TM7711 is used in electronic scales measuring the low-frequency single-channel analog front-end. The device can accept a low level directly the sensor Input signal, and then generates a serial digital output. Use Σ-Δ converter technology to achieve 24-bit no missing code performance. Via the selected output The signal is fed to an analog modulator based on a dedicated front-end programmable gain. Chip digital filter processing modulator output signal through Send commands over the communication port can adjust the filter cutoff and output update rate, and thus the first notch digital filter can be programmed. TM7711 only 2.6 ~ 5.5V single power supply. TM7711 is a fully differential analog input with a reference input. TM7711 is an ideal product for high-precision electronic scale systems, the use of a special structure to ensure that the device has a very low power consumption, And built-in power-down mode to reduce standby power consumption. The chip also features high integra)

说明：  通过计算机25针并口读写SPI总线Flash存储器(25-pin through the computer parallel port read and write SPI bus Flash memory)

将小文件写入外部SPI FLASH中，现将文件写入到单片机的某块flash区域，然后在写入外部falsh，适合小文件(Write the small file to the external SPI FLASH, now write the file to a single chip flash area of the single chip, and then write the external falsh to suit the small file.)

说明：  ministm32综合实验程序，包括9项功能，时钟，闹钟，记事本，画图等(ministm32comprehensive experimental program, including 9 functions, clock, alarm clock, notepad, drawing, etc.)