Demonstrates the use of the HM55B Compass module.

Version 1.0
(09/11/2006) Initial release

Version 1.1
(02/09/2008) Fixed sign detection at improper bit location

Version 1.2
(01/12/2008) Added calibration scheme - This demo shows the RAW heading with a "RED" compass arrow, along with the Correct heading after calibration with a "YELLOW" arrow on a TV display.

Version 1.3
(02/06/2008) Partitioned calibration scheme into separate Add-on program. This modular approach makes it easier to use in other applications without being wrapped up in the demo.

Version 1.4 - (03/24/2009) Calibration values displayed for easier interpolation

Note: The Serial version uses DEBUG graphics to draw a compass (see screenshot under Auxillary files)