4位密码锁完成

STM8串口中断，适用于初学者，应用方便，理解起来比较容易，希望对大家以后的学习有所帮助(Serial interrupt template used in STM8L Series Singlechip)

从事dspic单片机开发的嵌入式开发人员必不可少的参考手册(Engaged in the the dspic MCU development of embedded developers essential reference manual)

使用SSD1306或者SH1106驱动芯片的OLED程序初始化代码。(OLED init for the driver chip SSD1306 or SH1106.)

华为智能光伏电站解决方案设计图纸，包括子阵布局，逆变器，选配件，无线部分，监控系统，逆变器安装，一次系统等(HUAWEI smart photovoltaic power plant solutions design drawings, including sub array layout, inverter, accessories, wireless parts, monitoring system, inverter installation, a system, etc.)

步进电机的工作原理，可以详细了解步进电机的工作原理，对于时序问题，也是个很好的了解(Stepper motor works, you can learn more about the working principle of stepper motor, for the timing issue, but also a very good understanding of)

the computer comunication with FX3u plc,no need setting the D8120

基于STM32f407ZGT6编写的4*4矩阵键盘程序，并通过TFT显示屏显示(4*4 Matrix Keyboard Program Based on STM32f407ZGT6 and Displayed by TFT Display Screen)

Quectel移远MC20 GSM/GNSS/BLE模块的全部文档、资源，大部分未曾公开。分7个部分上传： 1. MC20模块介绍、指令/软件/使用手册、应用/生产指导、驱动 2. MC20硬件文档和设计指导 3. MC20 OpenCPU文档 4. MC20 OpenCPU SDK V1.1 5. MC20 OpenCPU SDK V1.3 6. MC20开发工具，含全部版本的QFlash 7. MC20开发OpenCPU所需的GCC编译器(Complete resource of Quectel MC20 GSM/GNSS/BLE module, most not disclosed. Uploaded in seven parts: 1. MC20 module introductions, command / software / user manuals, application / production guides, drivers 2. MC20 hardware documents and design guides 3. MC20 OpenCPU documents 4. MC20 OpenCPU SDK V1.1 5. MC20 OpenCPU SDK V1.3 6. MC20 development tools, including all versions of QFlash 7. GCC compiler needed for MC20 to OpenCPU development)

基于51单片机，12864液晶整屏滚动显示，动态显示(Based on 51 single-chip, full-screen scroll 12864 LCD display, dynamic display)

C8051f120的AD程序，调节电位器控制八个led灯的亮灭和闪烁频率(C8051f120 the AD process, adjust potentiometer control eight led lights out and flicker frequency)