Messages in this thread | | | Date | Wed, 28 Oct 2009 11:05:44 -0700 | From | Greg KH <> | Subject | Re: Dropped characters in serial connection without flow control |
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On Wed, Oct 28, 2009 at 06:59:37PM +0100, Peter Stuge wrote: > Peter Stuge wrote: > > I'm writing a line discipline for a serial port multiplexing > > hardware > > There is no(!) support for flow control in the hardware. > > Is there anything I can do to reduce serial port interrupt latency or > otherwise try to mitigate this in my ldisc or in Linux in general? I > realize that it will never be quite reliable without any flow > control.
What's wrong with XON/XOFF? That is a well-known flow control protocol for systems without hardware support for it.
And since when is adding a UART to a hardware chip expensive these days?
thanks,
greg k-h
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