Arm in this document, including basic knowledge of programming and related knowl...

str712的一些例子程序,ads1.2下运行,可以在官方板子上跑-str712 Some examples of programs, ads1.2 running, you can run on the official board

键盘状态扫描函数 /* 键盘扫描函数 读取当前键盘的状态 有按键按下返回相应按键值 无按键按下返回"0x00" */ -Keyboard status scan function/* keyboard scan function to read the current state of the keyboard keys have a corresponding button press to return to the value of non-button press to return to

该程序主要运用查询方式和中断方式两种方式进行键盘键值的获取，并显示在六个数码管上，显示的原则是最后按下的键值放在最低位的数码管上，其次的依次排列。-The main use of the program and the interruption of the way query in two ways to access the keyboard keys, and display in six digits, the principle is shown in the last key pressed on the lowest digital tube, followed by the sequence order.

两轴云台控制程序-two-axis tilt control procedures

应用背景The CMX990 provides, on-chip: a flexible, formattable GMSK packet and freeformat modem, a dual synthesiser fed from an external source, IF and RF transceiver stages for both Rx and Tx modes, and auxiliary ADCs and DACs for system control and monitoring.关键技术Operating in the range of 400MHz to 1GHz at data rates of 4 to 16 kbps. This single-chip, half-duplex device requires a minimum of external components, keeping end-product board size, power consumption and cost to an absolute minimum. The versatile GMSK modem is configured for either packet and freeformat data operation via an efficient task-oriented Rx and Tx format and command structure combined with data scrambling, interleaving and FEC and CRC capabilities. Rx data acquisition, extraction and tracking functions use Rx data-quality feedback to support varying signal environments. IF and RF functions in the Tx path handle all the signal processing requi

应用背景AM2321是广州奥松电子生产的数字式温湿度传感器。虽是国产品牌，其精度也可以与国外的主流温湿度传感IC媲美。美中不足：与国外同精度产品相比，AM2321的重复性和漂移指标偏大；只能手动焊接，量产时会很不方便。关键技术 AM2321支持5V工作，将电源、地、SCL、SDA四个管脚直接与开发板子的对应管脚相连。对于Arduino UNO，I2C总线的SDA信号线对应A4管脚，SCL时钟线对应A5管脚。之后，SCL、SDA线需要通过上拉电阻连接到5V电源，电阻值可取4.7k或10k。 IIC总线　LCD１６０２显示，ｕａｒｔ串口上传

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MSP430通用的单片机驱动程序源代码，内部FLASH读写函数。MSP430是TI公司推出的16bit超低功耗单片机。

嵌入式论文集，可以作为很好的学习丰富经验-Abstract The research and development of a real――time visual obstacle detection system are pre―- sented in the paper．The stereo vision system is realized by using a single camera and the optical and electrical identities of binocular image pair are kept．The image reprojection transformation brings zero disparities for the road surface features and thus facilitate the obstacle detection．The

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