As far as I can see, devc-ser8250 will empty the fifo of all devices 
that are registered on the same interrupt, whenever it gets an
RX or LS interrupt.

Do the ports all fire the same interrupt?

Eric Patterson wrote:
>
> I have a devc-ser8250 from qnx 6.3.0 and was wondering if a fix has 
> been published or someone else has seen the problem with the driver 
> not getting all receive buffers of pending data on a multi-port board 
> if one interrupt is fired?
>
> A little more story on that would be I have a winsystem's pc/104 board 
> with 4 serial ports on it.  If two or more the receive buffers get 
> data at the same time (very rare but happens) then only one interrupt 
> is fired.  The devc-ser8250 that I am using will only empty one of the 
> receive buffers causing the board to not fire off any more interrupts 
> since there is still data to be grabbed on the other receive buffers.
>
> Help?
>
> Eric
>
> _______________________________________________
> OSTech
> http://community.qnx.com/sf/go/post2278
>

-- 
cburgess@qnx.com