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40 lines
898 B
Arduino
40 lines
898 B
Arduino
// Copyright (c) 2026 Oleg Kalachev <okalachev@gmail.com>
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// Repository: https://github.com/okalachev/flix
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// Power management
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#ifdef ESP32
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#include <soc/soc.h>
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#include <soc/rtc_cntl_reg.h>
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#endif
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#include "filter.h"
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#include "util.h"
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float voltage = NAN;
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LowPassFilter<float> voltageFilter(1);
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int voltagePin = -1;
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float voltageScale = 2;
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void setupPower() {
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#ifdef ESP32
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REG_CLR_BIT(RTC_CNTL_BROWN_OUT_REG, RTC_CNTL_BROWN_OUT_ENA); // disable reset on low voltage
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if (digitalPinToAnalogChannel(voltagePin) == -1) voltagePin = -1; // test ADC pin
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#endif
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}
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void readVoltage() {
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if (voltagePin < 0) return;
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static Rate rate(10);
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if (!rate) return;
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float v = 0;
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#if defined(ESP32)
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v = analogReadMilliVolts(voltagePin) * voltageScale / 1000.0f;
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#elif defined(ARDUINO_ARCH_STM32)
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v = analogRead(voltagePin) * voltageScale * 3.3f / 4095.0f;
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#endif
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voltage = voltageFilter.update(v);
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}
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