This is the project GPSDisplay. The initial goal of the project is to have a similar device like the one described in FA 4/09 pg. 403 [1].
The original device is based on a PIC 18F252 and uses a Navilock NL-504ETTL or NL-501ETTL (Sirf3) as GPS module. By pressing a button one can schange the text displayed at the LCD between different display modes.
The GPS decoding routines stem mainly from the WhereAVR project of G.Dion (N4TXI) - see also ref. [2].
The LCD routines are taken from the library of P.Fleury [3]. Optionally, his UART routines can be used, too.
The button input routine is the 'famous' debounce code of Peter Danegger [4].
The used GPS module is a Garmin GPS25-LVC (12-channel receiver) [5].
The second version is using the NAVILOCK NL303P GPS module, its pinout is described here [6] (and in this file).
Pin Pin name Description 1 GND (black) Ground signal for power and data 2 VCC +5V (red) Power supply voltage to GPS +5V 3 Data TTL Rx (blue) Data to GPS, TTL levels 4 Data RS-232 Rx (white) Data to GPS, RS-232 levels 5 Data RS-232 Tx (green) Data from GPS, RS-232 levels 6 Data TTL Tx (yellow) Data from GPS, TTL levels
[1] - www.funkamateur.de
[2] - http://garydion.com/projects/whereavr/; WhereAVR_18JUL2005.zip
[3] - http://www.jump.to/fleury
[4] - http://www.mikrocontroller.net/topic/6492#new
[5] - GPS 25 Series, Technical Specification, Rev. G, Mar, 2000, https://buy.garmin.com/shop/store/manual.jsp?product=010-00124-00&cID=170&pID=70 https://buy.garmin.com/shop/shop.do?cID=170&pID=70&ra=true, http://www.gpscity.com/item-garmin-oem-25-lvc/oem25lvc.htm
[6] - http://pinouts.ru/GPS/navilock_gps_pinout.shtml
First you have to install a cross-build environment for AVR micro controllers.
The you have to get the LCD library (and eventually the UART library) from Peter Fleury. Change the path to these libraries in the Makefile.
This is how the LCD (2x16) is connected to the Atmel uController:
DATA0..3 = PC0..3 RS = PD3 RW = PD4 E = PD5