Memory

说明：  STM32F407读nandflash串口上位机显示(STM32F407 Reads Nandflash Serial Port Display on PC)

程序为STM32 串口UART 使用DMA方式收发数据的实践(how to read data on UART by using DMA when number of bytes to receive is not known in advance.)

AD8638/AD8639：16V自稳零、轨到轨输出运算放大器(中文版PDF, 728 KB)(AD8638/AD8639: 16V Auto-Zero, Rail-to-Rail Output Operational Amplifier (Chinese edition PDF, 728 KB))

基于AT89S52单片机的超声波测距系统设计源代码(Ultrasonic ranging system based on single chip design based on Ultrasonic Ranging System source code source code source code of ultrasonic ranging system based on single chip design)

　　　锅炉是工业过程中不可缺少的动力设备，为确保安全，稳定生产，对锅炉的自动控制十分重要。汽包水位是锅炉运行的主要指标，汽包水位过高过低都会影响运行的安全与经济性，必须严格加以控制。本文主要是用MATLAB对锅炉汽包水位控制系统进行仿真研究。建立了锅炉汽包水位对象的数学模型和控制系统，并用Matlab语言在计算机上编制锅炉汽包水位控制系统的仿真程序。通过对象特性、最佳PID参数整定、控制系统比较分析，了解了汽包水位对象特性、整定出了最佳PID参数、总结出了各种控制方案的特点与适用场合。 (　　　Boiler is a necessary power plant in the process of industry. In order to ensure the production and security, the auto-control of it is very important. The drum water level is an important variable to be controlled, it is hard to get the mathematic model of the water level with adjustive process, it is characteristic of nonlinearity, instability and time lag. The traditional control mode of three-variable in the drum water level mostly use PID.The problem of automatic control in industry coal-fired boiler is discussed in this thesis. First of all，the technological process and characteristics of industry boiler is analyzed. The task of boiler regulator is expounded. And then the system scheme of control is presented. The dynamic characteristic of loops for water level is analyzed especially the reason of ostensible water level. On the basis of these a routine PID controller is designed to control the water level. The part of differential is sensitive to high frequency noise, and easi)

测试电脑鼠各个红外探测器的算法，可自行调试(Test each computer mouse infrared detector algorithm, self-debugging)

说明：  8051 练习项目，包含串口、定时器、红外遥控、LCD1602、SMI串行总线读写等功能。(8051 exercise items, including serial port, timer, infrared remote control, LCD1602, SMI serial bus reading and writing functions.)

STM32通过SPI通信控制ADC采集脑电、眼电、心电数据，并将得到的数据通过串口与蓝牙通信后将其发送至PC端进行处理(STM32 collects the data of EEG, eye and ECG through the SPI communication control ADC, and sends the obtained data to the PC side after communication through the serial port.)

说明：  STM32F407+串口接收数据采用DMA方式 六路串口(Stm32f407 + serial port adopts DMA mode six channel serial port to receive data)

说明：  STM32F103中的adc采样，实现DMA的adc采样，不占用CPU(STM32F10 series of ADC sampling source code to achieve ADC conversion up to 12bit precision)