LC328是一款基于WiFi802.11b/g/n的无线CVBS转WiFi视频传输模块。支持多路
CVBS信号输入，时分复用，自适应NTSC和PAL制式，LC328转出的CVBS网络视频流
是业界通用标准，可以在IOS/Android/PC播放。
LC328同时提供1组串口，均支持串口透传功能，支持多种波特率，同时提供了1路
GPIO/PWM，方便透过LC328控制其他嵌入式设备，和其他设备通讯。
LC328采用了成熟WiFi解决方案，工作在AP模式下，其他终端可以直接连接LC328，
而无须外部额外路由器支持，可以独立组网，方便在野外使用。LC328的WiFi最高支持
150Mbps的速率，支持修改SSID和密码等。
LC328 is a wireless WiFi video transmission module based on WiFi 802.11 b/g/n, transmitting CVBS to WiFi signal. It supports multiple CVBS input, TDM(time division multiplexing), NTSC and PAL adaptation. The CVBS network video stream signal transmitted by LC328 complies with the general standard, can be played in the IOS/Android/PC player.
LC328 provides 1 serial port for transparent transmission, supporting all kinds of baud rate. And it also provide 1 GPIO/PWM to control other integrated devices to communication.
LC328 adopted mature WiFi solution and works in AP mode, for other device to connect with LC328 module directly without external router, so it can be independent networking and very convenient to use in the field. The highest WiFi transmission rate of LC328 is 150 Mbps, and the SSID and password can be modified. (2015-12-31, Unix_Linux, 1281KB, 下载3次)
Modbus协议是应用于电子控制器上的一种通用语言。通过此协议，控制器相互之间、控制器经由网络（例如以太网）和其它设备之间可以通信。它已经成为一通用工业标准。有了它，不同厂商生产的控制设备可以连成工业网络，进行集中监控。此协议定义了一个控制器能认识使用的消息结构，而不管它们是经过何种网络进行通信的。它描述了一控制器请求访问其它设备的过程，如何回应来自其它设备的请求，以及怎样侦测错误并记录。它制定了消息域格局和内容的公共格式。
Modbus protocol is used in a common language electronic controller. Through this agreement, between the controller, the controller can communicate via the network (such as Ethernet) and other devices. It has become a common industry standard. With it, different manufacturers of industrial control equipment can be connected into a network, centralized monitoring. This protocol defines a message structure used by the controller to recognize, regardless of what network they are communicating. It describes the process a controller requests access to other devices, and how to respond to requests from other devices, as well as how to detect errors and recorded. It formulated the message domain structure and content of a common format. (2014-08-14, Unix_Linux, 996KB, 下载3次)
带数码管显示的交通灯模拟控制系统设计. 硬件方面：8253产生1HZ的方波，脉冲到8259的IR1端，产生中断，调中断服务子程序。在加入紧急车道后，单脉冲（）连到8259的IRO端，产生一个高级的中断请求信号。
软件方面：主程序先对各个硬件初始化，在开CPU中断，然后空操作，等待中断。执行低级中断（IR1）时，8255的PA口负责选数码管，PB口负责显示数字，用查表法可查到0~9的数码管编码。
采用循环扫描方法，人眼即可看到连续的二位数。当倒计时减到零时，对红绿灯取反。若手动上下拨动单脉冲（）一次，则产生一个高级中断（IR0），程序转而执行此中断处理程序，处理完后返回继续执行低级中断（IR1）。
Traffic lights analog control system design with digital display (2014-05-12, Unix_Linux, 6KB, 下载3次)