MVs18_01_06

国外一个非常经典的OBD2车辆检测的实例源代码，做相关开发的人员有非常高的参考价值。(Abroad, a very classic example of OBD2 vehicle detection source code, to do the personnel-related development has a very high reference value.)

C51控制AD9833实现程控波形发生器，在keil5上即刻运行(C51 Controls AD9833 to Realize Programmable Waveform Generator)

说明：  串口发射1khz信号或者并口发射1khz信号，(Transmitting 1 kHz signal)

运动控制卡的详细开发资料，可以用来驱动步进电机(Motion control card developed detailed information can be used to drive stepper motor)

protues的教程，初学者的必备，可以学习很多东西，对自己收益很大(study protues)

PowerPCB/PADS封装库，原版安装后没有的，有常见的SO、SOIC、TSSOP等格式，省去自己画封装的麻烦(PowerPCB/PADS package library, after the original installation, and have common SO, SOIC, TSSOP and other formats, saved themselves the trouble of packaging draw)

STM32F103RB USB模拟串口范例，参考官方版本，改写双缓冲+环型队列接收，改写环节队列发送。工程开发环境为COOCOX IDE。(STM32F103RB USB virtual serial port example, refer to the official version, rewritten double buffering+ ring queue receiver, rewritten ring queue to send. Development environment for COOCOX IDE.)

MCP2515实现CAN232功能 2515初始化程序 CAN发送子程序,查询发送 CAN接收子程序，中断接收 硬件连接： AT89S51/52+MCP2515(MCP2515 features to achieve CAN232 2515 initialization procedure CAN send subroutine, send a query CAN receives subroutine, interrupt reception Hardware connection: AT89S51/52+ MCP2515)

Pid Discrete whit state variant

DH4YHL frequency counter (VHF version) with 74hc04 and 74hc132 as prescaler