qixiang

KeilC uVision3，最新的keil C编程软件，可以编写51单片机的程序（keilC或汇编语言）(KeilC uVision3, the latest keil C programming software, you can write 51 MCU programs (keilC or assembly language))

stm32 dma 和串口接收大数据的处理(STM32, DMA and serial receive large data processing)

PROFIBUS-DP现场总线智能节点的设计程序和源码电路图(Design of intelligent node based on PROFIBUS-DP)

触摸芯片讲解使用和应用原理讲解触摸芯片使用规则(Touch to explain the use and application of the principle chips)

说明：  采用4路红外对管进行循迹，电机控制小车运动。(Four infrared channels are used to track the tube, and the motor controls the motion of the car.)

采用12位MAX 197对外部信号采样。采用全周波傅立叶积分算法，对采样信号进行处理，对电力系统的电压有效值、功率等特征量进行实时在线监测；采用全数字测量法测量相位差；并采用自适应技术调整采样间隔，消除非同步采样对计算造成的误差，利用PIC18F458捕获功能实时监测电力系统频率波动，修订采样间隔。分析了各量的测量误差，均达到标准。并提供友好的人机交互界面。(used 12 MAX 197 pairs external signal sampling. Using Fourier-Cycle Integration Algorithm for the sampling signal processing, power systems to the RMS voltage, power characteristics of the volume in real-time on-line monitoring; All digital measuring method phase difference; Adaptive technology and the sampling interval, the elimination of non-synchronous sampling of the calculation error using PIC18F458 capture real-time monitoring of power system frequency fluctuations amended sampling interval. The analysis of the measurement error are up to standard. And to provide a friendly man-machine interface.)

说明：  模糊PID控制器,解决了规则爆炸的问题,同时改善了系统的动态性能和实时性(Fuzzy PID controller to solve the rule explosion problem, while improving the system dynamic performance and real-time)

说明：  使用定时器TIM3输出四路的SPWM波，其中一二路、三四路波形一致，一二路与三四路波形相差180°(Timer TIM3 is used to output four SPWM waveforms, of which one, two, three and four waveforms are identical, and one, two and three and four waveforms are 180 degrees different.)

说明：  野火官方基于OV5640解码二维码例程。单片机是F429.解码部分代码可以移植至其他IC。此库已经用在公司项目二维码门禁反扫功能上。(Wildfire officials decode two-dimensional code routines based on ov5640. The MCU is f429. The decoding part of the code can be transplanted to other IC. This library has been used in the company project QR code access control anti scanning function.)

简单打字速度练习，采用倒计时10分钟进行速度练习。(Simply typing speed exercises for 10 minutes using the countdown speed exercises.)