Added non-final versions of iris and tower firmware.

software/firmware/libraries/NeoGPS/README.md

@@ -0,0 +1,79 @@
+NeoGPS
+======
+
+This fully-configurable Arduino library uses _**minimal**_ RAM, PROGMEM and CPU time, 
+requiring as few as _**10 bytes of RAM**_, **866 bytes of PROGMEM**, and **less than 1mS of CPU time** per sentence.  
+
+It supports the following protocols and messages:
+
+#### NMEA 0183
+* GPGGA - System fix data
+* GPGLL - Geographic Latitude and Longitude
+* GPGSA - DOP and active satellites
+* GPGST - Pseudo Range Error Statistics
+* GPGSV - Satellites in View
+* GPRMC - Recommended Minimum specific GPS/Transit data
+* GPVTG - Course over ground and Ground speed
+* GPZDA - UTC Time and Date
+
+The "GP" prefix usually indicates an original [GPS](https://en.wikipedia.org/wiki/Satellite_navigation#GPS) source.  NeoGPS parses *all* Talker IDs, including
+  * "GL" ([GLONASS](https://en.wikipedia.org/wiki/Satellite_navigation#GLONASS)),
+  * "BD" or "GB" ([BeiDou](https://en.wikipedia.org/wiki/Satellite_navigation#BeiDou)),
+  * "GA" ([Galileo](https://en.wikipedia.org/wiki/Satellite_navigation#Galileo)), and
+  * "GN" (mixed)
+
+This means that GLRMC, GBRMC or BDRMC, GARMC and GNRMC from the latest GPS devices (e.g., ublox M8N) will also be correctly parsed.  See discussion of Talker IDs in [Configurations](extras/doc/Configurations.md#enabledisable-the-talker-id-and-manufacturer-id-processing).
+
+Most applications can be fully implemented with the standard NMEA messages above.  They are supported by almost all GPS manufacturers.  Additional messages can be added through derived classes.
+
+Most applications will use this simple, familiar loop structure:
+```
+NMEAGPS gps;
+gps_fix fix;
+
+void loop()
+{
+  while (gps.available( gps_port )) {
+    fix = gps.read();
+    doSomeWork( fix );
+  }
+}
+```
+For more information on this loop, see the [Usage](extras/doc/Data%20Model.md#usage) section on the [Data Model](extras/doc/Data%20Model.md) page.
+
+(This is the plain Arduino version of the [CosaGPS](https://github.com/SlashDevin/CosaGPS) library for [Cosa](https://github.com/mikaelpatel/Cosa).)
+
+Goals
+======
+In an attempt to be reusable in a variety of different programming styles, this library supports:
+* resource-constrained environments (e.g., ATTINY targets)
+* sync or async operation (reading in `loop()` vs interrupt processing)
+* event or polling (deferred handling vs. continuous calls in `loop()`)
+* coherent fixes (merged from multiple sentences) vs. individual sentences
+* optional buffering of fixes
+* optional floating point
+* configurable message sets, including hooks for implementing proprietary NMEA messages
+* configurable message fields
+* multiple protocols from same device
+* any kind of input stream (Serial, [NeoSWSerial](https://github.com/SlashDevin/NeoSWSerial), I2C, PROGMEM arrays, etc.)
+
+Inconceivable!
+=============
+
+Don't believe it?  Check out these detailed sections:
+
+Section  |  Description
+-------- |  ------------
+[License](LICENSE) | The Fine Print
+[Installing](extras/doc/Installing.md) | Copying files
+[Data Model](extras/doc/Data%20Model.md) | How to parse and use GPS data
+[Configurations](extras/doc/Configurations.md) | Tailoring NeoGPS to your needs
+[Performance](extras/doc/Performance.md) | 37% to 72% faster!  Really!
+[RAM requirements](extras/doc/RAM.md) | Doing it without buffers!
+[Program Space requirements](extras/doc/Program.md) | Making it fit
+[Examples](extras/doc/Examples.md) | Programming styles
+[Troubleshooting](extras/doc/Troubleshooting.md) | Troubleshooting
+[Extending NeoGPS](extras/doc/Extending.md) | Using specific devices
+[ublox](extras/doc/ublox.md) | ublox-specific code
+[Tradeoffs](extras/doc/Tradeoffs.md) | Comparing to other libraries
+[Acknowledgements](extras/doc/Acknowledgements.md) | Thanks!