Lpc2000

---- Original Message ----
From: "Robert Adsett" <subscriptions@...>
To: <lpc2000@yahoogroups.com>
Sent: Saturday, January 14, 2006 6:46 AM
Subject: Re: [lpc2000] LPC2148 and UART with hardware handshaking

> At 05:49 PM 1/13/06 +0000, Gus wrote:
>> Is it possible enable TX,RX,CTS and RTS on UART1 on LPC2148 (with HW
>> handshaking) while using the rest of UART1 pins as general purpose
>> pins?
>
> The short answer would be yes.
>
> The longer answer is to ask 'What are you expecting that to do?'
>
> If you expect the handshake to take place automatically then no.  The
> status and control pins on UART1 must be driven and read by the SW as
> appropriate.  In fact the only advantage really is that the status
> pins will provide an UART based interrupt.  The control pins have to
> be set by the SW when you want them to change.  It's the standard
> configuration in that family of UARTs since the 8250 when they were
> added mainly so that a single chip could handle the whole serial port.

The UARTs in LPC214x and LPC2101/02/03 actually have hardware auto-RTS and 
auto-CTS flow control (and a fractional baudrate generator, and functions 
that can help with baudrate detection).

Karl Olsen