I got it to work!

I had everything setup the way you suggested but I could not get anything from any of the RX connections on my breakout-gs!  And that's when I found out that:

On R277 of the breakout GS I2C is labelled incorrectly. Is swapped with STUART silkscreen.

So, now by connecting to SCL I am able to see my GPS data and also log them into a text file by the tee command.
I was also able to send info out of the TX using the modified serial-log.c that you gave me.

I really appreciate your time and efforts.
Best Regards,

On 11/14/06, Dave Hylands <dhylands@gmail.com> wrote:
Hi Hossein,

> I have tried all of the RX connections on the breakout-gs with the TX
> connection of my GPS and I have not seen any output yet!
> I am using:
> http://www.sparkfun.com/datasheets/GPS/EM-406%20Produ ct_Guide1.pdf
> as my GPS.
> Do you have any idea about why I am not seeing anything on my screen!

What voltage are you supplying the GPS?

Did you connect up the ground to the ground on the breakout-gs (with
no common ground they won't communicate). Did you connect up both
grounds on the GPS?

Is the LED on the GPS doing anything?

Have you tried connected the Tx to Rx on the breakout (no GPS) and
verify that you can receive what you send?

The docs say it communicates at 4800 baud.

You should see data even if you don't have a fix.

How are you trying to read the serial port on the gumstix?

Dave Hylands
Vancouver, BC, Canada

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