freescale hc12_C32 例程

ICCavr编写的TWI总线协议读写函数，测试通过-ICCavr prepared by TWI bus protocol to read and write function, the test

点阵LCD的驱动原理.绝对的精品.望给初学者以帮助-Dot matrix LCD driver principle. Absolute quality. Look to the beginners in order to help

按键扫描 51单片机加8279 8279通过74LS 138译码器扩展4×4键盘、6位显示器。 由3-8译码器对SL0～SL2译出键扫描线，由另一3-8译码器译出显示器的位扫描线，并采用了编码扫描方式。 为了防止出现重键现象，扫描输出线高位SL3不参加键扫描译码。CPU对8279的监视采用了查询方式，故8279的中断请求信号IRQ悬空未用。 -Scan button 82,798,279 plus 51 single-chip decoder 74LS 138 through the expansion of 4 × 4 keyboard, the display 6. From 3-8 decoder SL0 ~ SL2 translated to the key scanning line, by another 3-8 decoder translated display scan line, and uses code scanning. In order to prevent the emergence of the phenomenon of re-key, scan the output line does not take part in high level SL3 scan decoding keys. CPU on the 8279 surveillance using the query mode, the 8279 interrupt request signal IRQ left unused.

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基于51单片机的温度和电压采集与循环显示的控制程序，其中温度传感器为LMA95，采用I2C总线传输，显示器为8段LED数码管-51 single-chip-based temperature and voltage of the cycle of acquisition and display of the control procedures, including temperature sensors for LMA95, using I2C bus transmission, display for the 8 LED digital tube

TDK 6521 SOC 芯片 DEMO程序，由TDK 公司提供，可直接使用。开发平台keil c51。-TDK 6521 SOC chip DEMO procedures provided by the TDK Corporation, can be used directly. Development platform keil c51.

一个电路中电阻计算的小工具，可以快速计算如并联电阻的等效阻值等。很不错-Resistance in a circuit computing a small tool that can quickly calculate the equivalent parallel resistance, such as resistance and so on. Good

DS18B20温度控制器是以美国MAXIM/DALLAS半导体公司的单总线温度传感器DS18B20为核心，以ATMEL公司的AT89C52为控制器制作的结构简单、测温准确、具有一定控制功能的智能温度控制器。适合于恶劣环境的现场温度测量，如：环境控制、设备或过程控制、测温类消费电子产品。现实生活中的电冰箱，电脑机箱，就使用的这种经济的温度传感器显示工作环境温度。通过这种动态的温度测量，能实时的了解各种仪器设备的工作温度，进而判断仪器设备工作是否正常。-DS18B20 temperature controller is based on the United States MAXIM/DALLAS Semiconductor single-bus temperature sensor DS18B20 as the core, ATMEL Corporation AT89C52 produced for the controller structure is simple, accurate temperature measurement has a certain control functions of the smart temperature controller. Suited to harsh environment of the scene temperature measurement, such as: environmental control, equipment or process control, temperature measurement Consumer electronic products. Real-life refrigerators, computer chassis, on the use of such economic temperature sensor shows the temperature working environment. Through this dynamic temperature measurement, real-time understanding of a variety of instruments and equipment operating temperature, and the

用单片机16F877A外接MAX518实现正弦波输出-16F877A MCU external realize sinusoidal output MAX518

本软件程序为KEILc51开发环境，实现AT89S52单片机与PS2键盘的通讯，同时用液晶LM3037实现同步显示-the software development environment for KEILc51 achieve AT89S52 SCM and PS2 keyboard communications, LCD display synchronized LM3037