Lpc2000

Your RS485 level conversion chip, such as an LTC485, should have a
receive enable pin.  Tie a line to that and disable reception during
transmit through a GPIO pin.

JP

--- In lpc2000@yahoogroups.com, "Richard" <richas@y...> wrote:
>
> I am working with a RS485 transceiver that echoes the transmitted data
> back through the receive channel.  When I switch transmission
> direction from receive to transmit I wish to ignore the incoming data
> as it is just a copy of what is being set.  I can't disable the UART1
> in the VIC as this would kill all UART operations.  So I am trying to
> disable the RBR interrupt in the U1IER register.  The problem is that
> when I do this it triggers an RDA interrupt immediatly.
> 
> What am I missing here?
> 
> Thanks
> 
> Rich
>