摘要:基于RS-485总线构建的分布式监测网络具有数据传输距离远、组态灵活、可靠性高、成本低等优点.本文采用了通用异步收发器MAX3140实现DSP与RS-485网络的数据通信,介绍了MAX3140的主要功能和使用特点,以及TMS320VC5402的多通道缓冲串口(McBSP)的时钟停止模式(SPI);给出了接口的硬件电路和基于RS-485通信协议的通信测试软件设计.
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