Move the example into board preset.

[bertos.git] / examples / develgps / README

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-= DevelGPS v0.1 =
-
-== Overview ==
-
-The purpose of this project is to implement a portable GPS locator / geocaching
-finder tool using the Cortex-M3 based Luminary Micro LM3S1968 evaluation board.
-
-The device proposes a user interface to configure the GPS coordinates of a
-target location and shows on the OLED display the direction and distance to
-reach the target.
-
-== Hardware requirements ==
-
- - Luminary Micro LM3S1968 Evaluation Kit
- - a GPS module
- - a mobile phone battery
-
-== Software requirements ==
-
- - BeRTOS kernel
-
-BeRTOS components used for this project:
- - Kernel with preemptive scheduler and task priorities
- - Device drivers: UART, OLED display, navigation/select pushbuttons
- - NMEA parser
- - GFX library (+ menu management module)
-
-== Implementation ==
-
-The GPS module is connected to UART1 RX pin (UART0 is kept for debugging
-purposes). The mobile phone batter is used as a power source both for the GPS
-module and the LM3S1968 board.
-
-From the software's point of view, BeRTOS already provides the drivers to
-manage all the required devices and a NMEA parser to retrieve the right
-informations from the raw GPS strings: position, date & time, link quality.
-
-The multi-process environment and preemptive scheduler provided by BeRTOS is
-exploited to create independent threads operating in producer/consumer way:
- - a thread takes care of retrieving and processing NMEA string from the UART,
- - a thread manages the GUI, updating the OLED display on new GPS informations
-   or user's input,
- - a thread reports the status of the GPS receiver blinking a LED when GPS data
-   are correctly received.
-
-The GUI is organized using a main menu that allows to select:
- - a form to insert the target GPS coordinates,
- - a form showing a compass with target direction, distance and GPS positions
-   to reach the target,
- - a form to show the status of the GPS receiver.
-
-NOTE: the distance is evaluated using the Haversine formula between the current
-and target GPS position. The Haversine formula remains particularly
-well-conditioned for numerical computation even at small distances, making the
-device particularly useful when walking, hiking or moving at a close distance
-to the target.