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chore: improve VBAT measurement (#5635)

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This commit is contained in:
3djc
2024-10-30 11:14:14 +10:00
committed by GitHub
parent adf24e760f
commit 366df6080e
3 changed files with 23 additions and 15 deletions
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radio/src/hal/adc_driver.cpp
+4 -1
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@@ -314,7 +314,10 @@ uint16_t getBatteryVoltage()
int32_t instant_vbat = anaIn(adcGetInputOffset(ADC_INPUT_VBAT));
// TODO: remove BATT_SCALE / BATTERY_DIVIDER defines
#if defined(BATT_SCALE)
#if defined(VBAT_MOSFET_DROP)
// 1000 is used as multiplier for both numerator and denominator to allow to stay in integer domain
return (uint16_t)((instant_vbat * ADC_VREF_PREC2 * ((((1000 + g_eeGeneral.txVoltageCalibration)) * (VBAT_DIV_R2 + VBAT_DIV_R1)) / VBAT_DIV_R1)) / (2*RESX*1000)) + VBAT_MOSFET_DROP;
#elif defined(BATT_SCALE)
instant_vbat =
(instant_vbat * BATT_SCALE * (128 + g_eeGeneral.txVoltageCalibration)) /
BATTERY_DIVIDER;