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总体方案设计 CAN 总线接口电路主要包括:单片机、控制器接口、总线收发器和看门狗电路等。采用Philips公司生产的SJA1000控制器和与其配套的 82C250CAN收发器。按照CAN总线物理层协议选择总线介质,设计布线方案,连接成CAN网络。双绞屏蔽线可设两套,在两套介质上同时进行信息传输,接收方只用一个介质。在冗余和非冗余段的连接临界点处进行总线切换。 硬件电路的设计主要...[详细]