[maemo-developers] FW: [maemo-developers] Pinout of the port in the battery compartment?

[From: David Briggs]

Forwarding this reply to the list since it hasn't shown up. (probably because he's not on the list)

-----Original Message-----
From: Noli.Sicad at csiro.au [mailto:Noli.Sicad at csiro.au]
Sent: Tuesday, April 18, 2006 12:14 AM
To: David Briggs; maemo-developers at maemo.org
Subject: [maemo-developers] Pinout of the port in the battery
compartment?


Hi David,

I am not subscribe to maemo-developer/Nokia 770 developer list. I am
just reading.

I found this (below)

http://www.oesf.org/forums/index.php?showtopic=17994

I think this is you are looking.

Regards, Noli

Noli Sicad


~~~~~~~~~

Any one knows how to add a serial port to the Nokia770. I am trying to
debug the device and it is very hard with out any output.

I have noticed an 11 pins conector (pad) in the battery compartment of
the device, is their any chance that some of those pins are for serial
port?

~~~~
	
Here's what I've found via experimentation.

1-2-3-4-5-6
-7-8-9-A-B-

Pin 9 is RxD (Nokia receive input) and pin A is TxD (Nokia transmit
output). These are the third and second pins from the right towards the
battery, respectively.

I used the metal shield as a ground. The outputs are evidently 3.3v - I
used a USB-mobile phone cable as described in
http://www.nslu2-linux.org/wiki/HowTo/AddASerialPort and
http://www.i-hacked.com/content/view/66/47/ to connect to the device.

I enabled the R&D mode and set the serial console flag and connected via
8N1,115200.

I don't know of a suitable connector - I used a couple of stiff wires
held in place with electrical tape.