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Re: [Discuss-gnuradio] RS232_RXD/TXD on daughtercard interface

From: John Orlando
Subject: Re: [Discuss-gnuradio] RS232_RXD/TXD on daughtercard interface
Date: Tue, 19 Jan 2010 11:58:00 -0600

On Tue, Jan 19, 2010 at 11:55 AM, Matt Ettus <address@hidden> wrote:
> On 01/19/2010 09:41 AM, John Orlando wrote:
>> Hi all,
>> A while back I noticed there are two signals called RS232_RXD and
>> RS232_TXD exposed on the PMC connector going to the daughtercard slots
>> on the USRP.  Tracing these back on the USRP schematic, they go to the
>> Cypress EZUSB chip.  I searched around a bit but didn't find any
>> reference to any daughtercard using these, nor did grep find any
>> reference to these in the 3.2.2 release of GNUradio.  Is there any way
>> to send/receive UART data to these lines from within GNUradio?  If
>> not, what was the intent with these lines?
>> Thanks much...
> Those have never been used.  The original intention was to use it as a UART.
>  The USRP2 does not connect to those pins, so it's not a good idea to use
> them.

Gotcha...as always, thanks for the quick reply Matt!

John Orlando
CEO/System Architect
Epiq Solutions

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