#include "ao.h"
#define MUL(p,m) ((int32_t) AO_ADC_REFERENCE_DV * ((p) + (m)))
-#define ADD(p,m) (MUL(p,m)/2)
#define DIV(p,m) ((int32_t) AO_ADC_MAX * (m))
+#define ADD(p,m) (DIV(p,m) / 2)
#define scale(v,p,m) (((int32_t) (v) * MUL(p,m) + ADD(p,m)) / DIV(p,m))
#if HAS_APRS || HAS_BATTERY_REPORT
int16_t
ao_battery_decivolt(int16_t adc)
{
- return scale(adc, AO_BATTERY_DIV_PLUS, AO_BATTERY_DIV_MINUS);
+ return (int16_t) scale(adc, AO_BATTERY_DIV_PLUS, AO_BATTERY_DIV_MINUS);
}
#endif
int16_t
ao_ignite_decivolt(int16_t adc)
{
- return scale(adc, AO_IGNITE_DIV_PLUS, AO_IGNITE_DIV_MINUS);
+ return (int16_t) scale(adc, AO_IGNITE_DIV_PLUS, AO_IGNITE_DIV_MINUS);
}
#endif