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单片机串口2取GPS时间经纬度等，然后通过GSM发送出去，同时显示发送出去的数据 串口1用于与GSM通信(Microcontroller serial port 2 to take GPS time, latitude and longitude, etc., and then sent via GSM, at the same time display of the data sent out the serial port 1 for GSM communication)

说明：  stm32f103通过spi接口扩展NRF24L01进行通信的例程(stm32f103 communicate with NRF24L01 by spi interface)

硬件电路比较简单，3个LED指示灯，5个按键控制上下左右及暂停，LCD显示。总共有20关。设计用到了逻辑门控制电路。(The hardware circuit is simple, 3 LED lights, 5 key control above and below and suspension, LCD display. A total of 20 customs. The design used in the logic gate control circuit. )

实现一个简单的电梯控制器,能够完成一个四层电梯的控制(The realization of a simple elevator controller, to complete a four storey elevator control)

说明：  两路光电开关驱动，2019电赛A组，测试程序(Two-way Photoelectric Switch Drive, Group A of 2019 Electricity Competition, Test Procedure)

本文档总结了CPM调制解调方法，涵盖GMSK，MSK，CPFSK等调制技术的总结，以及各种相干，非相干解调的matlab仿真结果，仅供参考。(This document summarizes the CPM modulation and demodulation methods, covering GMSK, MSK, CPFSK and other modulation techniques, as well as a variety of coherent, non coherent demodulation of the MATLAB simulation results, for reference only.)

DA9125 配置spi程序 正弦波产生(DA9125 configuration spi program sine wave generated)

基于AT89C52和MAX197的多路模拟量采集系统(A mutilple Analog Data Acquisition system based on AT89C52 and MAX197)

基于PCF8591的51单片机温度监测系统，串行AD转换，程序已验证可行，显示准确，含proteus仿真文件(Based on PCF8591 51 single chip temperature monitoring system, serial AD conversion, the program has been verified feasible, accurate display, including proteus simulation file.)

驱动IC-LG4524的驱动程序。该程序能点亮TFT2。2的LCM(Driver IC-LG4524 driver. The program can be lit TFT2. 2 of the LCM)