Date: Mon, 08 Dec 2008 10:49:51 -0800 From: Marcel Moolenaar <xcllnt@mac.com> To: Mike Tancsa <mike@sentex.net> Cc: freebsd-current@freebsd.org Subject: Re: uart vs sio differences ? Message-ID: <ED8BC24F-EAC3-4266-AF54-4C6262DDC156@mac.com> In-Reply-To: <200812081621.mB8GLMxB041498@lava.sentex.ca> References: <200812081621.mB8GLMxB041498@lava.sentex.ca>
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On Dec 8, 2008, at 8:21 AM, Mike Tancsa wrote: > Unfortunately, we only control the FreeBSD side of things and the > other end of the serial connection is a windows app we dont > control. Everything seems to work ok from our side, but the other > side which we dont control seems to be missing some things we are > sending it and vice versa. It looks to me that flow-control is disabled, is that right? Not only does uart(4) make use of the larger buffer of the hardware, it's also more efficient under puc(4) than sio(4) is because of the use of the serdev I/F. It's possible that the receiver can not keep up when uart(4) is used. A serial line analyzer should tell you more... FYI, -- Marcel Moolenaar xcllnt@mac.com
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