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added battery voltage support for Heltec T114

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This commit is contained in:
recrof
2025-03-20 11:08:13 +01:00
parent fd55837eec
commit 41e01a0e25
1 changed files with 11 additions and 9 deletions
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20
src/helpers/nrf52/T114Board.h
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@@ -18,7 +18,8 @@
// built-ins // built-ins
#define PIN_VBAT_READ 4 #define PIN_VBAT_READ 4
#define ADC_MULTIPLIER (3 * 1.73 * 1.187 * 1000) #define PIN_BAT_CTL 6
#define MV_LSB (3000.0F / 4096.0F) // 12-bit ADC with 3.0V input range
class T114Board : public mesh::MainBoard { class T114Board : public mesh::MainBoard {
protected: protected:
@@ -37,17 +38,18 @@ public:
} }
#endif #endif
#define BATTERY_SAMPLES 8
uint16_t getBattMilliVolts() override { uint16_t getBattMilliVolts() override {
int adcvalue = 0;
analogReadResolution(12); analogReadResolution(12);
uint32_t raw = 0; analogReference(AR_INTERNAL_3_0);
for (int i = 0; i < BATTERY_SAMPLES; i++) { pinMode(PIN_BAT_CTL, OUTPUT); // battery adc can be read only ctrl pin 6 set to high
raw += analogRead(PIN_VBAT_READ); digitalWrite(PIN_BAT_CTL, 1);
}
raw = raw / BATTERY_SAMPLES;
return (ADC_MULTIPLIER * raw) / 4096; delay(10);
adcvalue = analogRead(PIN_VBAT_READ);
digitalWrite(6, 0);
return (uint16_t)((float)adcvalue * MV_LSB * 4.9);
} }
const char* getManufacturerName() const override { const char* getManufacturerName() const override {