Cyclone开发板的原理图，多种可自由选择，自行画板，无密码-Cyclone development board schematics, many designs，drawing board by myself, no password

该文档是基于单片机来实现双击串口通行，文档附带源代码，可实现，无密码-The document is based on the microcontroller to achieve double-click the serial port access, documentation included with the source code, can be achieved, without password

<嵌入式系统基础>书籍配套源码(无密码),供学习开发参考-< -Based embedded system> books matching source (no password), the development of reference for the study

1：io输入输出。 2：定时器用法。 3：3轴脉冲定位（参数可设置）。 4：采用485IC与上位机通信。 5：本程序特别适合51单片机初学者，以及在此程序上增加新功能玩玩还是不错的。 6：无密码-1: io input and output. 2: Timer usage. 3: 3-axis pulse positioning (settable parameter). 4: The 485IC communicate with the host. 5