RS485 half duplex: auto-switch to receive mode

[Anthony Loiseau]

Multitech Conduit device does support RS485 half duplex which can be enabled through struct serial_rs485, member flags (ref: http://www.multitech.net/developer/software/mlinux/using-mlinux/mlinux-using-accessory-cards/mtac-mfser-usage/).

RS485 half duplex requires a (fast) switch from TX to RX after each requests to get replies of those requests. I have some questions about that:

1. Is above configuration enough to enable auto-switch from TX to RX? (I understand it this way)
2. Can it ensure no reply get lost even when high baud-rate are in use (115200)? / Is this also supported with high CPU workloads (case of a big interruption trap triggered meanwhile for example)?
   (more or less, the question behind is to know if the switch is performed by the main CPU after end of sent-frame (driver-side – subject to latency) or if it is done by the RS485 module itself).

Best regards.

• This topic was modified 8 years, 6 months ago by Anthony Loiseau. Reason: text: fix mishandled html tags
• This topic was modified 8 years, 6 months ago by Anthony Loiseau. Reason: reword "IT" to "interruption"

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