[dorkbotpdx-blabber] another chip-level question ...

[Donald Delmar Davis]

The 644p which is the foundation of the sanguino has a pair of uarts.  
You should also think about replacing the serial with one of the two  
synchronous serial protocols which are  bussable (i2c,spi);

On May 15, 2009, at 11:08 AM, Brian Richardson wrote:

> Hah!  Nice find.  I thought serial needed the other lines exposed  
> (CTS, etc).. but it doesn't look like it!
>
> On Fri, May 15, 2009 at 11:03 AM, Fred Smith <fxsmith at gmail.com>  
> wrote:
> >so i'm asking: what do you do when you want your arduino
> >to have more serial ports?
>
> Have you looked at this?
>
> "In this tutorial you will learn how to implement Asynchronous serial
> communication on the Arduino in software to communicate with other
> serial devices. Using software serial allows you to create a serial
> connection on any of the digital i/o pins on the Arduino. This should
> be used when multiple serial connections are necessary."
>
> http://www.arduino.cc/en/Tutorial/SoftwareSerial
>
>
> On Thu, May 14, 2009 at 3:54 PM, Mykle Hansen <mykle at mykle.com> wrote:
> > hi again,
> >
> > for this new speedvest+plus+weirdness design i'm making, i
> > plan to have an arduino talking to several different chips.
> > my arduino only has one UART, and i have two devices that
> > want to talk to it -- one supertex chip that wants to read
> > out a bit pattern, and one GPS unit that wants to write
> > various location data at 4800 baud.  also, i would love to
> > be able to maintain a serial connection to the computer
> > for debug output while i develop this thing.
> >
> > so i'm asking: what do you do when you want your arduino
> > to have more serial ports?  is there a strategy for sharing
> > one UART between many devices?  is there a sub-chip that
> > can MUX several serial conversations into one?  is there
> > a way to repurpose the SPI or TW units in the ATmega168
> > into standard serial ports?   what would dorkbot do?
> >
> > my fallback is to use bit-bashing to send the output,
> > use the UART for the input, and reduce the debugging
> > to a vocabulary of "the green LED means it's working."
> >
> > thanks for your help.  i promise that if i get anything
> > blinking before i leave town for the Faire, i will bring
> > it to the meeting or send a picture.
> >
> > -mykle-
> > ---
> > HELP!  A Bear is Eating Me!
> > http://helpabeariseatingme.com
> >
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> >
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