Re: Saving data from the serial port

["Stuart MacDonald" <stuartm@connecttech.com>]

From: "David Lawyer" <dave@lafn.org>
> On Fri, Apr 18, 2003 at 06:02:19PM -0400, Stuart MacDonald wrote:
> > From: "David Lawyer" <dave@lafn.org>
> > > I don't think so (but of course you should use flow control).  There
> > > just isn't any way to use flow control to protect the FIFO buffers
from
> > > overruns in Linux.  Flow control (for the input flow into a PC) only
> > > protects the serial 8K buffer in main memory.
> >
> > Not true. Many modern uarts have on-board flow control both hardware
> > and software based. Turn it on and the hardware does the magic when it
> > finds its fifos getting full.
>
> Does the Linux serial driver support this?  I didn't think that it did.
> David Lawyer

linux-2.4.20/drivers/char/serial.c:1774

Although support seems to be only for auto-cts. I coulda sworn it was
for both. The hardware based soft-flow control isn't being used
though.

..Stu