Lpc2000

We are using the MAX1480EC fully isolated driver.  There is no
receiver enable, only a driver enable.  

Rich

--- In lpc2000@yahoogroups.com, Tom Walsh <tom@o...> wrote:
>
> jp_thrower wrote:
> 
> >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.
> >
> >  
> >
> Yeah.  I also use a half-duplex RS485 protocol and I tie the Driver 
> Enable and Receive Enable pins together on the LTC485.  So, when I 
> activate the driver the reciever is disabled.
> 
> TomW
> 
> 
> >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
> >>
> >>    
> >>
> >
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> > 
> >Yahoo! Groups Links
> >
> >
> >
> > 
> >
> >
> >  
> >
> 
> 
> -- 
> Tom Walsh - WN3L - Embedded Systems Consultant
> http://openhardware.net, http://cyberiansoftware.com
> "Windows? No thanks, I have work to do..."
> ----------------------------------------------------
>