Lpc2000

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.
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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
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>--- In lpc2000@yahoogroups.com, "Richard" <richas@y...> wrote:
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>>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
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-- 
Tom Walsh - WN3L - Embedded Systems Consultant
http://openhardware.net, http://cyberiansoftware.com
"Windows? No thanks, I have work to do..."
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