基于TMS320VC5402的RS_485通信设计  

The RS_485 communication design based on TMS320VC5402

作　　者：宋坤[1] 黄浩乾[1] 刘明初 陈熙源[1] 

机构地区：[1]东南大学仪器科学与工程学院,南京210096 [2]南京杰思尔设备工程有限公司,南京210042

出　　处：《南京信息工程大学学报（自然科学版）》2011年第5期448-451,共4页Journal of Nanjing University of Information Science & Technology（Natural Science Edition）

基　　金：航空科学基金(20090869008)

摘　　要：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.The hardware design and software programming of the RS_485 communication is completed based on the TMS320VC5402 DSP. In order to extend the hardware, designer connects directly the multi-channel buffered port （MeBSP） of Texas Instrument＇s TMS320VC5402 DSP chip by the SPI mode with MAXIM＇s MAX3100 universal asynchronous serial transceiver interface, and then get through Linear Technology＇s LTC1480 which is a low power RS _485 transceiver, thus achieve a new standard interface based on RS_485 serial communication. The design makes full use of the DSP on-chip resources to simplify the hardware and software architecture as much as possible. The paper presents a hardware connection principle diagram and introduces related software programming.

关 键 词：多通道缓冲串行口(McBSP) 串行外设接口(SPI) 串行通信 通用异步收发传输器(UART) RS_485 

分 类 号：TN915.04[电子电信—通信与信息系统]