基于S3C2440A的时统终端系统的设计  

Design of Time Unified and Terminal System Based on S3C2440A

作　　者：佟刚[1] 崔明[1] 

机构地区：[1]中国科学院长春光学精密机械与物理研究所,吉林长春130033

出　　处：《仪表技术与传感器》2012年第7期42-44,共3页Instrument Technique and Sensor

基　　金：国家863发展计划资助项目(2010AA8080202)

摘　　要：S3C2440A是一款16/32位RISC微处理器,具有强大的控制和信号处理能力。S3C2440A集成了8路10位A/D转换模块,支持快速的A/D转换,并带有采样保持电路,具有内部参考电压发生器,将其应用在IRIG-B码(AC码)的解调中。IRIG-B码是标准时间码格式之一,广泛应用于靶场时间信息的传递和各系统的时间同步。详细介绍了IRIG-B码信号解码和编码技术的原理及方法,自动增益电路和过零检测电路的硬件设计。S3C2440A的软件采用C语言编写,使程序有很强的可移植性。结果表明:该系统解码精度高,运行稳定,具有较强的抗干扰能力和实际应用价值。S3C2440A is a 16/32-bit RISC microprocessor, has a strong ability to control and signal processing. The lO-bit ADC is a recycling type device with 8-channel analog inputs, supports fast analog-to-digital conversions, sample select control and reference generator, can be used in the IRIG - B code demodulator. IRIG - B code is one of the standard time code format, used for time information transfer and time synchronization between different ranges in the shooting range system. The theory of digitM de- code and coding technique and the hardware design of automatic gain and zero-crossing detection circuit were presented in detail. C language was adopted to carry out software design,which makes the program transplantable. The results demonstrate that tile sys- tem runs steadily, posses high synchronization precision and better anti-interference.

关 键 词：S3C2440A A/D转换 IRIG-B码 时间码 

分 类 号：TN919.3[电子电信—通信与信息系统]