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SubjectRe: [PATCH] RS485: fix inconsistencies in the meaning of some variables
> Perhaps the RTS toggle after transmit delay needs to be large, and 
> they'd rather do it in userspace than block in the driver. I also
> recall a protocol that would send a master assertion command and hold
> on to RTS afterwards. I can easily imagine needing to quickly

Appletalk does this for one. Some protocols use it for priming low cpu
power receivers. You fire a header message at the target which fits
into its serial fifo, it then responds and can sit in a tight loop
getting the following frame data.

Alan


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