-static inline int16_t ao_delta_pressure_to_adc(uint32_t pressure)
-{
- static const double volts_base = 0.5;
- static const double volts_max = 4.5;
-
- double volts = (double) pressure / AO_FULL_SCALE_PRESSURE * (volts_max - volts_base);
- double adc_volts = volts * 10.0/15.6; /* voltage divider in front of the ADC input */
- if (adc_volts > 1.0)
- adc_volts = 1.0;
- double adc = adc_volts * 32767.0;
-
- if (adc < 0)
- adc = 0;
- return (int16_t) adc;
-}
-
-#define AO_BOOST_DETECT ao_delta_pressure_to_adc(AO_BOOST_DETECT_PRESSURE)
-#define AO_QUIET_DETECT ao_delta_pressure_to_adc(AO_QUIET_DETECT_PRESSURE)