Re: A serial port conundrum

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On Fri, 28 Feb 2003, Nikhil Nair wrote:

> Possible solutions:
> 
> a)  Hack the serial driver to use the FIFO for input but ignore it for
> output (as if the UART is a cross between a 16550A and a 16450); I don't
> understand enough about the low-level stuff to know if this is possible -
> it would mean delving deep into drivers/char/serial.c in the kernel, I
> would imagine.

You can't enable transmit and receive fifoes independently on the 16550.

> b)  Raise the priority of serial interrupts, and leave the FIFO off.  I
> don't know how to go about doing this, or what the dangers might be...

There is no irq priority in standard Linux.  Anyway I doubt that would solve 
the issue.

> Any thoughts, suggestions, advice etc. would be much appreciated!

Maybe a flow control problem?


Nicolas



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