Messages in this thread | | | Date | Wed, 28 Oct 2009 18:59:37 +0100 | From | Peter Stuge <> | Subject | Dropped characters in serial connection without flow control |
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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.
Baud rate is currently 115200 but could become 57600.
Is there something in particular that I can do wrong or right in the ldisc?
Might it be a good idea to add a circ_buf in the receiver path and move out any and all attempts at parsing incoming data? Currently it has a simple message buffer and a state machine in there.
Characters are dropped both going out and coming in. Nothing to do about the out direction, but maybe input can be made reliable?
I don't expect it, but maybe you know a trick?
//Peter
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