基于TMS320VC5402的RS_485通信设计

完成了基于TMS320VC5402DSP的RS_485通信的硬件设计和软件编程.基于美国TI公司TMS320VC5402DSP芯片的多通道缓冲口(McBSP)进行适当的硬件扩展,以SPI方式直接和MAXIM公司的MAX3100通用异步串行收发器接口,然后经Linear Technology公司的LTC1480超低功耗RS_485收发器,从而实现了一种新的基于RS_485标准接口串行通讯的数据传输,充分利用了DSP的片上资源,使硬件和软件结构尽量简单化.

艾讯推出两款全新CAN Bus工业级转换器

艾讯公司全新推出分别由CAN埠转换为RS-232／422／485接口以及CAN端口转换为USB埠的工业级转换器iCON-101CS与iCON—101CU，提供更快速、简易地将CAN设备连接到USB埠或RS-232／422／485接口的Pc或程序装置的方式，使用1组9-pin male D—Sub（DB9）连结器的接口至CAN端口。

基于CAN总线驱动器PCA82C250的多主结构分布式工业测控系统的应用研究

本文给出一种全新的、基于 CAN 总线驱动器 PCA82C250的分布式工业测控系统的网络组成。该系统克服了 RS-485的许多缺点,既具有 CAN 总线传输距离远、传输速率快、可靠性高等的特点,又具有等同于 RS-232的编程容易、接口简单的优势,可以使工程师完全摆脱对 CAN 控制器82C200(或者 SJ1000)的接口和编程。实际应用表明,这是一种可以替代 RS-485,组成简易、实用的 CAN BUS 系统。

基于STM32的RFID电子支付系统研究

针对射频识别技术电子支付系统普遍存在的读卡缓慢、效率低和稳定性差等问题,本文设计了基于STM32微控制器和射频识别技术读卡器的电子支付系统。系统选用STM32F407ZET6作为主要控制处理器芯片,读卡器选用广州思腾公司的ST_RF04,卡片选用飞利浦公司生产的M1(mifare one)S50卡,并通过RS_485实现实时通讯;同时,在KEIL-MDK的软件开发平台上,开发支付系统的软件程序,实现读卡、写卡、充值、扣款等功能。测试结果表明,该系统实现了对M1卡的高速读写等功能,具有稳定、快捷和高效的特点,满足人们对电子支付系统高效安全的要求。因此,该研究在电子支付方面具有广阔的应用前景。

Design of Intelligent Fire Alarm System for Large Storage Places Based on AVRmega128 Single Chip Microcomputer

With principles of reliability, independence, practicality and economical effi- ciency, a set of intelligent fire alarm system based on AVRmega128 single chip microcomputer was designed to solve problems of fire alarm system in many large- scale warehouses. Using advanced flame sensor, 485 bus communication, computer interactive software and related peripheral devices, this intelligent fire alarm system has functions of sound-light alarm and intelligent fire extinguishing. The human-com- puter interactive software was adopted for the remote control of the alarm main control panel through the 485 bus communication. This design of intelligent fire alarm system shows high reference and practical value to the development of intel- ligent alarm products with high integration and high reliability.

ASIC Design of High-Speed Low-Power HDLC Controller

Combined with the engineering requirement, a high-speed low-power ASIC design of HDLC controller based on RS-485 bus is given in this paper. On principle of Top-Down design, this ASIC design uses multi-techniques to reduce its die area and dynamic power, and overcomes some problems appeared frequently in application systems of the RS-485 circuits formed by the Standard Interface Chips. This design also improves the system reliability and reduces the system area.

Design of Distributed Temperature Measurement System for Switchgear

This paper develops a novel distributed temperature measurement system based on DSP and DS18B20 digital thermometer. The real-time temperature of each node in the switchgear is obtained by several DS18B20s which are connected on the 1-wire bus together. RS-485 master-slave communication protocol is used to centralize monitoring temperatures of several switchgear cabinets. The system also has the function of temperature alarm. The operation of simulation experiment has showed that the system is able to complete monitoring real-time temperatures in high voltage switchgear.

载人六足机器人操控系统设计

本文以大型载人六足机器人的研究为背景,采用基于ARM内核处理器的Vx Works实时多任务操作系统对机器人的操纵控制系统进行了研究。采用具有高性能的远程数据采集和控制系统的CAN总线和RS485总线通信接口,设计开发了基于uc GUI嵌入式图形支持系统的操控系统显示界面。该操控系统能够在一个50ms周期内实时把采集到的操控命令传输到底层控制系统,并在下一个周期能够及时完成底层控制系统反馈数据的处理及显示。

电力监控和能源管理分布式智能监测系统在低压配电系统中的应用

介绍一种新型的电力监控和能源管理分布式智能监测系统，它基于RS485 Modbus、RJ45 Bus和以太网Modbus TCP协议，在现场的各个监测点安装电压和电流监测模块，对这些设备进行直接监测，并与上层显示和监控单元或者上位机之间相连，向上传递采集到的实时电参数及电能质量等数据。