Trying to attach a Magellan Sportrak.

[Ubicumque]

Hi ppl, I'm trying to follow the steps of deniska interfacing a gps to the serial port of the psp. I've posted this 2 weeks ago in the dcemu deniska subforum, I'm repeating it here to see if there are someone that can point me into the right direction.

I'd love to add to the list of supported devices the following device.

Magellan Sportrak Pro

http://img100.imageshack.us/img100/8058 ... zzzez9.jpg
http://img157.imageshack.us/img157/7631 ... ea2wf6.jpg

It supports various versions of NMEA, the last that it can hold is the V2.1 GSA. I don't know if it is fully supported by the scripts of Deniska or if it will need some modifications, but this is not the point now =), and the following baud rates, [1200,4800,9600,19200,57600,115200].

According to pinouts.ru this is the pinout:

http://img92.imageshack.us/img92/459/pinoutsv7.jpg

So I've connected the units like this:
Magellan ---> PSP
pin 3 GND ---> pin 2 GND
pin 4 TXD ---> pin 6 RXD

I've checked the TX voltage with the multimeter and never exceeds 3.3V. I didn't try with any resistor, but I have some them here :D

GPSlim always says that isn't any unit connected, so I decided to try with the serial port echo from lua player, and this is what the screen shows.

I've tried all the baud rates changing the line "System.sioInit(xxxx)" and matching the baud rate in the unit but the result are always very similar to this:

http://img453.imageshack.us/img453/2686/echosu4.jpg

So... any suggestion?

A portion of nmea sentences from this device.

Code: Select all

$GPGLL,4022.4062,N,00355.0098,W,142703.812,A*28                                               
$GPGGA,142703.81,4022.4062,N,00355.0098,W,1,04,2.0,00627,M,,,,*3A                                                                 
$GPRMB,A,0.00,R,SIM001,SIM002,4024.9527,N,00355.0098,W,002.5,000,021.7,V*2D                                                                           
$GPRMC,142703.81,A,4022.4062,N,00355.0098,W,21.7,000.0,181106,02,W*43                                                                     
$GPAPB,A,A,0.0,R,N,,,002.3,M,SIM002,002.3,M,,*13 

Thanks in advance, and sorry about my bad english I'm from... well, look at the nmea file. ^^