可以自己制作U盘 SM2246EN_tu

说明：  测试环境当前温度，用DS18b20传感器显示在lcd1602上(turnover temperature)

西门子S7-200 Modbus通信（主站）(S7-200 Modbus master)

AT89S51单片机与ADC0809模数转换器的三种典型连接(Three typical microcontroller AT89S51 with ADC0809 ADC connection)

实现计数器加法、减法、清零电路。用7448、74ls192实现，可以仿真成功，适用于初学者。(Realization counter addition, subtraction, clear circuit. By 7448,74 ls192 achieve success can be simulated, for beginners.)

speech emotion recognition,including feature extraction,training model and cllassifier.the main features are about formants,MFCC,picth etc.(speech emotion recognition)

说明：  简易示波器双通道，tim adc dma(Simple oscilloscope dual channel, Tim ADC DMA)

STM32 检测KS103超声波模块检测距离，串口发送(STM32 distance detection KS103 ultrasonic module, a serial port to send)

MCP3421驱动程序，支持多个IC控制(MCP3421 driver, supporting multiple IC controls)

编译语言：C语言 联合开发网 - pudn.com

LCD初始化代码，能够点亮SSD2119 driver IC液晶屏(init LCD)