- Define float versions of math functions to the double versions
on AVR (eg. #define sinf sin).
- These macros appear to be missing in older versions of avr-libs.
- Include AP_Math.h rather than math.h to get these definitions.
this adds register level emulation of the ADS7844 and the RC
input/output hardware on the APM1, allowing for SITL testing without
enabling HIL in the code
Ben Nizette
Andrew Tridgell
James Bielman
Pat Hickey