Lpc2000

At 12:28 PM 11/30/04 -0600, you wrote:

>At 12:07 PM 11/30/2004 , Lasse Madsen wrote:
> >
> >Hi R.M.
> >
> >>I wasn't aware of that limitation - that is an interesting issue.
> >
> >Now that's exactly why I proposed a list!
> >
> >Because there are many "limitations" on this processor and one can spend a
> >fortune finding them manually.
>
>Does the LPC2k UART support an interrupt on transmit complete?  That's
>really nice to have if you need driver control for RS-485.  I got stung on
>the H8/Tiny--it has a TC interrupt, but it fires on the last data bit, not
>the stop bit.

It just implements the standard 16550 interrupts so it only interrupts on 
buffer empty.  You can get the same timing by listening to your own 
transmission.  The receive interrupt will occur on transmit complete.  Hmm, 
CTI timing will come into play so maybe it only works if you can tolerate 
that delay before turning the line around.  Messy, messy.  I've always used 
an interpacket delay with a fixed minimum value.

Robert

" 'Freedom' has no meaning of itself.  There are always restrictions,
be they legal, genetic, or physical.  If you don't believe me, try to
chew a radio signal. "

                         Kelvin Throop, III