I\'ve heard of On Board Units (OBU) can communicate via RS485. My question is, how? For example, I would like to ask the state of some runtime variables from the OBU (what doors are open?, etc.)
I want to use rs485 placed on my card. I\'m working on arm-linux and with pxa255 processor. I hav开发者_JAVA技巧e already checked \"serial.h\" located in arm-linux tool chain but unfortunately i could
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I am writing a simple multi-drop RS485 protocol for serial communications within a distributed system.I am using an addressable model where slave devices are given a window of 20ms to respond.The mast
Can someone suggest an open source implementation of a Mo开发者_StackOverflow中文版dbus RTU Slave for a Microchip PIC18 processor? I\'m looking for an implementation of Modbus RTU for RS-232/RS-485, b
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