Hi experts! I'm trying to send/receive messages via RS485 using a simple MAX485 IC connected to a Netarm processor (Digi Connect-ME). The problem is that I need to enable/disable the transmit option through the UART RTS line but RTS remains high after the transmission, causing the RS485 slaves to not to respond to the master's query.
I tried to command RTS from my application but the delays were too big. Thus, I guess I will have to modify the existing serial driver (serial_netarm_dma.c) to correctly manage RTS following my needs. Did anyone do a similar hack? Any other idea? Thank you very much! -- Daniel Berenguer http://www.usapiens.com http://www.opnode.org
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