摘要
基于MSP430单片机开发一种T5557射频卡读写系统。为了实现仪表应用的低成本、低功耗和高可靠性要求,利用单片机片内外设产生125kHz信号经功率放大调制后给射频卡提供电源和数据;同时利用片内外设接收解码卡片返回数据,实现了射频卡的读写功能。将该设计应用于预付费热量表系统进行数据交换,成功地实现了充值和系统维护等功能;经实验,完全满足该仪表系统设计的性能、成本及功耗要求。
A T5557 RF card system based on microcontroller MSP430 is developed. In order to achieve low cost, low power consumption and high reliability requirements of instrumentation applications, this paper uses micrecontreller on-chip peripherals to generate 125kHz signal, which is amplified by power and modulation to provide power and data for RF card; While taking advantage of the on-chip timer measuring RF card returns signal pulse width to decoder card to return data and achieve RF card read/ write function. By applying this design in the prepaid calorimeter, the system successfully achieves such as data exchange recharge and maintenance etc functions ; by experiment, it fully meets the requirements of performance, cost and power of instrumentation system.
出处
《计算机与现代化》
2013年第5期227-230,234,共5页
Computer and Modernization
