Messages in this thread | | | Date | Mon, 14 Nov 2011 12:07:45 +0000 | From | Alan Cox <> | Subject | Re: [PATCH] RS485: fix inconsistencies in the meaning of some variables |
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> 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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