Does anyone have experience with RS485 and ATMEGA128 ?
Do I need RS232 for it ? or RS485 is replacing my RS232 ?
Any references or clues will be appreciated..
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Ross McKenzie, Melbourne Australia
I have an olimex mega128 board, and it has an rs232 gizmo so the avr can talk to an rs232 device like an old pc. When I want to use rs485, it is usually several devices all listening to the same two rs485 wires. Like a bunch of temperature sensors. rs232 is used from one device to another... point to point. rs485 is for multidrop. You might be wondering how a computer can send and receive to several devices all using the same pair of wires. The freaks can explain this, but you need to get an avr with a serial port and write a program that sends and receives ascii characters using the serial port first.
Imagecraft compiler user
...like any other processor ever made in the past 40 years or so...
But you may want to have a look here https://www.avrfreaks.net/index.p... and here http://www.members.optusnet.com....
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