Re: serial port not working correctly (you better read it if you want PPP)

[Ian Duggan]

> The CTIi interrupt you are seeing is a timeout interrupt. This is used
> to cover the case where anough bytes aren't recieved to trigger the high
> water interrupt. The serial hardware issues these at a regular interval
> to keep the buffer clear.

Actually, the interrupt is issued if the time between bytes being
received exceeds the timeout value. The hardware is a little smarter
than just issuing an interrupt at a regular interval.

-- Ian

~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Ian Duggan                    ian@ianduggan.net
                              http://www.ianduggan.net