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Merge pull request #4743 from Dimand/Current_calibration_fix

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Changed the current calibration to be more sensible
This commit is contained in:
Michael Keller 2017-12-17 11:07:07 +13:00 • committed by GitHub
commit 7a7f1ceda5
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2 changed files with 5 additions and 4 deletions
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5
src/main/sensors/current.c
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@ -107,9 +107,10 @@ static int32_t currentMeterADCToCentiamps(const uint16_t src)
const currentSensorADCConfig_t *config = currentSensorADCConfig();
int32_t millivolts = ((uint32_t)src * ADCVREF) / 4096;
millivolts -= config->offset;
// y=x/m+b m is scale in (mV/10A) and b is offset in (mA)
int32_t centiAmps = (millivolts * 10000 / (int32_t)config->scale + (int32_t)config->offset) / 10;
return (millivolts * 1000) / (int32_t)config->scale; // current in 0.01A steps
return centiAmps; // Returns Centiamps to maintain compatability with the rest of the code
}
static void updateCurrentmAhDrawnState(currentMeterMAhDrawnState_t *state, int32_t amperageLatest, int32_t lastUpdateAt)

4
src/main/sensors/current.h
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@ -65,8 +65,8 @@ typedef struct currentMeterADCState_s {
} currentMeterADCState_t;
typedef struct currentSensorADCConfig_s {
int16_t scale; // scale the current sensor output voltage to milliamps. Value in 1/10th mV/A
int16_t offset; // offset of the current sensor in millivolt steps
int16_t scale; // scale the current sensor output voltage to milliamps. Value in mV/10A
int16_t offset; // offset of the current sensor in mA
} currentSensorADCConfig_t;
PG_DECLARE(currentSensorADCConfig_t, currentSensorADCConfig);