# GPS on CAN

In this task you will need to receive Can-frames on the can-bus that contain the GPS location of the
vehicle. The raw data has to be converted to arc-milliseconds

    1°2'5" == (1*3600+ 2*60 + 5)*1000

Beware that the system you are running your code on will not support floating point operations.
Use only unsigned and signed integers!
Still the precision of your calculations has to be +-100 milli-arc-seconds


## Conversion to Arc-Degree

inDegree hex = 180/(2^31-1) * (hex) [°]

## GPS Datalayout in CAN Message

		Byte7 ST_LAT_NAVI
		Byte6 ST_LAT_NAVI
		Byte5 ST_LAT_NAVI
		Byte4 ST_LAT_NAVI
		Byte3 ST_LONG_NAVI
		Byte2 ST_LONG_NAVI
		Byte1 ST_LONG_NAVI
		Byte0 ST_LONG_NAVI

## Byteorder

Little Endian (Least Significant Byte is at lowest address)

## Status Longitude Navigation

		ST_LONG_NAVI

### Possible Values

		-180° ...  +180°

### signal type

32 Bit Signed Integer (Byte 0 ... Byte 3)

### Invalid Data

Invalid-Value: 80 00 00 00h
Signal not available value: 7F FF FF FF

## Status Latitude Navigation

		ST_LAT_NAVI

### Possible Values

		-180° ...  +180°

### signal type

32 Bit Signed Integer (Byte 4 ... Byte 7)

### Invalid Data

Invalid-Value: 80 00 00 00h
Signal not available value: 7F FF FF FF

## Running the tests

you will need a working ruby installation to execute the tests

### Install the bake tool

see https://esrlabs.com/gems/doc/bake-toolkit/


### run the tests

execute `rake run` from this directory