(1)连接硬件 将开发板 RS485 的A、B、GND 引脚分别和 PC 机串口适配器(USB 转 485 转串口模块)的 A、B、GND 引脚相连。 (2)打开 PC 机串口终端 在终端打开 kermit,并设置波特率: $ sudo kermit C-Kermit>setline /dev/ttyUSB0 C-Kermit>setspeed9600C-Kermit>setflow-control none C-Kermit> connect...
参考链接: https://en.wikipedia.org/wiki/Universal_asynchronous_receiver-transmitter https://blog.csdn.net/gq1900/article/details/51885259 https://baike.baidu.com/item/UART/4429746 http://www.cnblogs.com/huanzxj/p/4522274.html http://www.eepw.com.cn/article/201606/292407.htm ———...
From Waveshare Wiki RS485 CAN Shield RS485 CAN Shield Designed for NUCLEO/XNUCLEO Introduction RS485 CAN Shield Designed for NUCLEO/XNUCLEO. More Feature Based on the standard Arduino interface design, it is compatible with development boards including UNO, Leonardo, NUCLEO, and XNUCLEO. ...
INT : Reserved interrupt port. tip When it is used as an input mode, you need to turn the switch to IN, and if it is used as an output mode, you need to turn the switch to OUT to prevent burning out. Connection Schematic ...
https://baike.baidu.com/item/RS-232/2022036https://en.wikipedia.org/wiki/RS-232https://baike.baidu.com/item/RS-485/9695794https://en.wikipedia.org/wiki/RS-485https://baike.baidu.com/item/RS-422https://en.wikipedia.org/wiki/RS-422...
[4]https://zh.wikipedia.org/wiki/EIA-485 [5]https://zh.wikipedia.org/wiki/EIA-422 [6]https://codertw.com/%E7%A8%8B%E5%BC%8F%E8%AA%9E%E8%A8%80/586303/ [7]https://www.itread01.com/content/1546130883.html [8]https://makerpro.cc/2020/01/uart-part3/ ...
RS485接口是一种广泛应用于工业自动化和通信领域的串行通信接口标准。它由电子工业协会(EIA)制定,全称为EIA-485-A。RS485接口主要用来进行长距离、多点间的通信,其最大通信距离可达1200米,支持多达32个节点的多主从通信。 RS485接口采用差分信号传输方式,具有较高的抗干扰能力,适合在噪声较大的环境中使用。它通过两...
数据在“A”和“B”上传输。“C”是地面参考。本节还通过A和B终端之间的极性定义逻辑状态1 (off)和0 (on)。如果A对B是负的,状态是二进制1。反极性(A + B−)是二进制0。标准没有为这两种状态分配任何逻辑函数 参考资料:https://en.wikipedia.org/wiki/RS-485...
https://en.wikipedia.org/wiki/RS-485 直接 杜邦线 接就行,TOOL的CH1接485-A,CH2接485-B,注意GND也要接上。 测试方式二: 当然,也可以使用TOOL自带的485接口输出测试: TOOL的 示波器 配置: 配置: 动态效果:
From Waveshare WikiJump to: navigation, search Pico-2CH-RS485 2-Channel RS485 Module for Raspberry Pi Pico, SP3485 Transceiver, UART To RS485 Contents 1 Overview 1.1 Features 1.2 Specification 1.3 Pinout 1.4 Hardware connection 1.4.1 Connection 1.5 Setup environment 1.6 Download example 1.7...