周立功 485 用户指导手册，很强大。有详细电路图，不用找型号上面很清楚。 老外写的485通讯例子.485_guide.pdf RS485协议.pdf 485通讯.rar RS232转RS485电路图.doc RS485协议 485总线常识.pdf 485总线应用与选型指南.pdf 看完后基本不用找别的了。 -ZLG 485 user guide, very powerful. A detailed circuit diagram, do not look for models abov

各种串口接口屋里规格以及串口之间的相同不同点，串口接口协议-The same difference between a variety of serial interfaces room specifications and serial, serial interface protocol

STM32源码，在RTX中使用485通讯协议-STM32 source, in the RTX 485 communication protocol used

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