Re: Serial issue

[Russell King <rmk+lkml@arm.linux.org.uk>]

On Fri, Aug 18, 2006 at 04:32:43PM -0400, Mark Hounschell wrote:
> Lee Revell wrote:
> > On Fri, 2006-08-18 at 16:25 -0400, Mark Hounschell wrote:
> >> Take it from someone who actually still uses dumb terminals every day,
> >> any thing over 9600 baud still requires some kind of flow control for
> >> reliable consistent operation. Software (Xon/Xoff) and or hardware
> >> (RTS/RTS/DTE) flow control.
> >>
> > 
> > Any idea why the serial console does not work at all with flow control
> > enabled (regardless of whether the host runs Linux or another OS)?
> > 
> > Lee
> > 
> > 
> 
> Your cable is probably wrong.  Both ends have to be using the type of flow
> control your cable is wired for.

Not quite true.  You can use XON/XOFF or hardware flow with a fully
populated cable, but if you have a sparsely populated cable (RX,TX,GND
only) then hardware flow control can't (and won't) work.

-- 
Russell King
 Linux kernel    2.6 ARM Linux   - http://www.arm.linux.org.uk/
 maintainer of:  2.6 Serial core