Russell King wrote:
So, there are three distinct flow control scenarios:
So I'm clear on how you interpret these,
am I correct with the following?
- conventional RTS/CTS
RTS active = ready to receive
CTS active = allowed to send
- alternative RTS/CTS
RTS active = on before send, off after send
CTS active = allowed to send
- RS485
RTS active = on before send, off after send (RTS enables driver)
CTS ignored (2 wire mode, no CTS)
So maybe the extra control fields would be:
CRTSONTX - RTS on before send, off after send
CTXONCTS - wait for CTS before sending
--
Paul Fulghum
Microgate Systems, Ltd.
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