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Programming for RS-485 port on devboard_82.



I need some info about programming for the devboard_82 rs-485 port.

I’ve written code to communicate over the devboard_82 rs-232 ports.


In general, what’s different about programming for rs-232 and 485?


I understand that I may need to manipulate some control lines.


Is there a good reference somewhere that describes this?


I’m running Linux kernel v2.4.22.