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Merge pull request #65 from awolden/awolden/h3-pin-fix

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Fix heltec v3.2 pin polarity reversal
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ripplebiz 2025-03-15 12:09:47 +11:00 • committed by GitHub
commit f844f9e02a
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1 changed files with 11 additions and 2 deletions
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13
src/helpers/HeltecV3Board.h
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@ -24,11 +24,20 @@
#include <driver/rtc_io.h>
class HeltecV3Board : public ESP32Board {
private:
bool adc_active_state;
public:
void begin() {
ESP32Board::begin();
// Auto-detect correct ADC_CTRL pin polarity (different for boards >3.2)
pinMode(PIN_ADC_CTRL, INPUT);
adc_active_state = !digitalRead(PIN_ADC_CTRL);
pinMode(PIN_ADC_CTRL, OUTPUT);
digitalWrite(PIN_ADC_CTRL, !adc_active_state); // Initially inactive
pinMode(PIN_VEXT_EN, OUTPUT);
digitalWrite(PIN_VEXT_EN, LOW); // for V3.2 boards
@ -74,7 +83,7 @@ public:
uint16_t getBattMilliVolts() override {
analogReadResolution(10);
digitalWrite(PIN_ADC_CTRL, PIN_ADC_CTRL_ACTIVE);
digitalWrite(PIN_ADC_CTRL, adc_active_state);
uint32_t raw = 0;
for (int i = 0; i < 8; i++) {
@ -82,7 +91,7 @@ public:
}
raw = raw / 8;
digitalWrite(PIN_ADC_CTRL, PIN_ADC_CTRL_INACTIVE);
digitalWrite(PIN_ADC_CTRL, !adc_active_state);
return (5.2 * (3.3 / 1024.0) * raw) * 1000;
}